/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/mono-crafted_9.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 19:00:43,237 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 19:00:43,239 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 19:00:43,278 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 19:00:43,320 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 19:00:43,320 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 19:00:43,322 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 19:00:43,323 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-20 19:00:43,334 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 19:00:43,335 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 19:00:43,337 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 19:00:43,337 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 19:00:43,337 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 19:00:43,337 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 19:00:43,337 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 19:00:43,337 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 19:00:43,337 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 19:00:43,338 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 19:00:43,338 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 19:00:43,338 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 19:00:43,338 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 19:00:43,339 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 19:00:43,339 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 19:00:43,339 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 19:00:43,339 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 19:00:43,339 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 19:00:43,339 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 19:00:43,339 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 19:00:43,340 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 19:00:43,340 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-20 19:00:43,340 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 19:00:43,517 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 19:00:43,547 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 19:00:43,550 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 19:00:43,551 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 19:00:43,551 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 19:00:43,552 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_9.c [2022-03-20 19:00:43,614 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0b6ae742/00fe0bea67694ee1901cdbf1515b08cb/FLAG0bf735957 [2022-03-20 19:00:43,980 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 19:00:43,980 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_9.c [2022-03-20 19:00:43,985 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0b6ae742/00fe0bea67694ee1901cdbf1515b08cb/FLAG0bf735957 [2022-03-20 19:00:43,999 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0b6ae742/00fe0bea67694ee1901cdbf1515b08cb [2022-03-20 19:00:44,000 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 19:00:44,013 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 19:00:44,025 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 19:00:44,025 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 19:00:44,027 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 19:00:44,028 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 07:00:43" (1/1) ... [2022-03-20 19:00:44,028 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71606082 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:00:44, skipping insertion in model container [2022-03-20 19:00:44,029 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 07:00:43" (1/1) ... [2022-03-20 19:00:44,033 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 19:00:44,049 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 19:00:44,188 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/mono-crafted_9.c[318,331] [2022-03-20 19:00:44,201 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 19:00:44,206 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 19:00:44,212 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/mono-crafted_9.c[318,331] [2022-03-20 19:00:44,214 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 19:00:44,222 INFO L208 MainTranslator]: Completed translation [2022-03-20 19:00:44,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:00:44 WrapperNode [2022-03-20 19:00:44,222 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 19:00:44,223 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 19:00:44,223 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 19:00:44,223 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 19:00:44,231 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:00:44" (1/1) ... [2022-03-20 19:00:44,231 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:00:44" (1/1) ... [2022-03-20 19:00:44,236 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:00:44" (1/1) ... [2022-03-20 19:00:44,236 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:00:44" (1/1) ... [2022-03-20 19:00:44,239 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:00:44" (1/1) ... [2022-03-20 19:00:44,241 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:00:44" (1/1) ... [2022-03-20 19:00:44,246 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:00:44" (1/1) ... [2022-03-20 19:00:44,247 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 19:00:44,248 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 19:00:44,248 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 19:00:44,248 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 19:00:44,249 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:00:44" (1/1) ... [2022-03-20 19:00:44,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 19:00:44,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:00:44,271 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 19:00:44,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 19:00:44,292 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 19:00:44,292 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 19:00:44,292 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 19:00:44,292 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 19:00:44,292 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 19:00:44,292 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 19:00:44,293 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 19:00:44,293 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 19:00:44,293 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 19:00:44,293 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 19:00:44,293 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 19:00:44,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 19:00:44,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 19:00:44,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 19:00:44,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 19:00:44,293 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 19:00:44,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 19:00:44,331 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 19:00:44,332 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 19:00:44,399 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 19:00:44,403 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 19:00:44,403 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 19:00:44,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 07:00:44 BoogieIcfgContainer [2022-03-20 19:00:44,404 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 19:00:44,405 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 19:00:44,405 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 19:00:44,410 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 19:00:44,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 07:00:43" (1/3) ... [2022-03-20 19:00:44,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50d16587 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 07:00:44, skipping insertion in model container [2022-03-20 19:00:44,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:00:44" (2/3) ... [2022-03-20 19:00:44,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50d16587 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 07:00:44, skipping insertion in model container [2022-03-20 19:00:44,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 07:00:44" (3/3) ... [2022-03-20 19:00:44,423 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_9.c [2022-03-20 19:00:44,426 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 19:00:44,426 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 19:00:44,454 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 19:00:44,459 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 19:00:44,459 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 19:00:44,470 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) [2022-03-20 19:00:44,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-20 19:00:44,475 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:00:44,476 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:00:44,476 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:00:44,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:00:44,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1325153485, now seen corresponding path program 1 times [2022-03-20 19:00:44,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:00:44,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [627894880] [2022-03-20 19:00:44,496 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:00:44,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1325153485, now seen corresponding path program 2 times [2022-03-20 19:00:44,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:00:44,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960133541] [2022-03-20 19:00:44,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:00:44,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:00:44,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:00:44,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:00:44,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:00:44,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:00:44,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:00:44,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960133541] [2022-03-20 19:00:44,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960133541] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:00:44,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:00:44,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 19:00:44,644 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:00:44,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [627894880] [2022-03-20 19:00:44,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [627894880] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:00:44,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:00:44,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 19:00:44,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019615929] [2022-03-20 19:00:44,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:00:44,647 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 19:00:44,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:00:44,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 19:00:44,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 19:00:44,682 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) [2022-03-20 19:00:44,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:00:44,728 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-03-20 19:00:44,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 19:00:44,730 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 [2022-03-20 19:00:44,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:00:44,733 INFO L225 Difference]: With dead ends: 32 [2022-03-20 19:00:44,733 INFO L226 Difference]: Without dead ends: 13 [2022-03-20 19:00:44,735 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 19:00:44,737 INFO L913 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 [2022-03-20 19:00:44,738 INFO L914 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] [2022-03-20 19:00:44,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-03-20 19:00:44,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-03-20 19:00:44,796 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) [2022-03-20 19:00:44,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2022-03-20 19:00:44,798 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2022-03-20 19:00:44,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:00:44,798 INFO L478 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2022-03-20 19:00:44,799 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) [2022-03-20 19:00:44,799 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2022-03-20 19:00:44,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-20 19:00:44,799 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:00:44,799 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:00:44,799 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 19:00:44,800 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:00:44,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:00:44,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1315918275, now seen corresponding path program 1 times [2022-03-20 19:00:44,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:00:44,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [849541107] [2022-03-20 19:00:44,801 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:00:44,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1315918275, now seen corresponding path program 2 times [2022-03-20 19:00:44,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:00:44,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700226968] [2022-03-20 19:00:44,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:00:44,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:00:44,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:00:44,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:00:44,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:00:44,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:00:44,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:00:44,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700226968] [2022-03-20 19:00:44,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700226968] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:00:44,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:00:44,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:00:44,884 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:00:44,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [849541107] [2022-03-20 19:00:44,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [849541107] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:00:44,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:00:44,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:00:44,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704902775] [2022-03-20 19:00:44,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:00:44,885 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 19:00:44,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:00:44,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 19:00:44,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 19:00:44,886 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) [2022-03-20 19:00:44,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:00:44,920 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2022-03-20 19:00:44,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 19:00:44,921 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 [2022-03-20 19:00:44,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:00:44,921 INFO L225 Difference]: With dead ends: 22 [2022-03-20 19:00:44,921 INFO L226 Difference]: Without dead ends: 15 [2022-03-20 19:00:44,922 INFO L912 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 [2022-03-20 19:00:44,922 INFO L913 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 [2022-03-20 19:00:44,923 INFO L914 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] [2022-03-20 19:00:44,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-03-20 19:00:44,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-03-20 19:00:44,926 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) [2022-03-20 19:00:44,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-03-20 19:00:44,926 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2022-03-20 19:00:44,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:00:44,927 INFO L478 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-03-20 19:00:44,927 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) [2022-03-20 19:00:44,927 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-03-20 19:00:44,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-20 19:00:44,927 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:00:44,927 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:00:44,927 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 19:00:44,928 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:00:44,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:00:44,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1372110560, now seen corresponding path program 1 times [2022-03-20 19:00:44,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:00:44,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2485851] [2022-03-20 19:00:44,991 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:00:44,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1209153456, now seen corresponding path program 1 times [2022-03-20 19:00:44,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:00:44,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337164934] [2022-03-20 19:00:44,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:00:44,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:00:45,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:00:45,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:00:45,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:00:45,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:00:45,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:00:45,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337164934] [2022-03-20 19:00:45,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337164934] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:00:45,057 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:00:45,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 19:00:45,089 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:00:45,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2485851] [2022-03-20 19:00:45,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2485851] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:00:45,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:00:45,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 19:00:45,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57122918] [2022-03-20 19:00:45,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:00:45,090 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 19:00:45,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:00:45,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 19:00:45,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-03-20 19:00:45,093 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) [2022-03-20 19:00:45,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:00:45,142 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2022-03-20 19:00:45,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 19:00:45,143 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 [2022-03-20 19:00:45,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:00:45,143 INFO L225 Difference]: With dead ends: 22 [2022-03-20 19:00:45,143 INFO L226 Difference]: Without dead ends: 17 [2022-03-20 19:00:45,144 INFO L912 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 [2022-03-20 19:00:45,146 INFO L913 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 [2022-03-20 19:00:45,147 INFO L914 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] [2022-03-20 19:00:45,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-03-20 19:00:45,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-03-20 19:00:45,165 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) [2022-03-20 19:00:45,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-03-20 19:00:45,166 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2022-03-20 19:00:45,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:00:45,166 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-03-20 19:00:45,166 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) [2022-03-20 19:00:45,166 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-03-20 19:00:45,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-20 19:00:45,166 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:00:45,166 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:00:45,167 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-20 19:00:45,167 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:00:45,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:00:45,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1059749499, now seen corresponding path program 1 times [2022-03-20 19:00:45,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:00:45,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2053637886] [2022-03-20 19:00:49,883 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:00:49,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1150048112, now seen corresponding path program 1 times [2022-03-20 19:00:49,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:00:49,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650314826] [2022-03-20 19:00:49,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:00:49,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:00:49,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:00:49,899 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:00:49,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:00:49,937 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:00:49,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1059749499, now seen corresponding path program 2 times [2022-03-20 19:00:49,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:00:49,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619544452] [2022-03-20 19:00:49,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:00:49,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:00:49,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:00:49,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:00:49,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:00:50,001 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:00:50,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:00:50,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619544452] [2022-03-20 19:00:50,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619544452] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:00:50,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161506758] [2022-03-20 19:00:50,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:00:50,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:00:50,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:00:50,004 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:00:50,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 19:00:50,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:00:50,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:00:50,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-20 19:00:50,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:00:50,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:00:50,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:00:50,134 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:00:50,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161506758] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:00:50,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:00:50,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-20 19:00:50,136 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:00:50,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2053637886] [2022-03-20 19:00:50,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2053637886] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:00:50,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:00:50,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 19:00:50,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6226667] [2022-03-20 19:00:50,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:00:50,136 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 19:00:50,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:00:50,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 19:00:50,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-20 19:00:50,137 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) [2022-03-20 19:00:50,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:00:50,164 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2022-03-20 19:00:50,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 19:00:50,165 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 [2022-03-20 19:00:50,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:00:50,165 INFO L225 Difference]: With dead ends: 26 [2022-03-20 19:00:50,165 INFO L226 Difference]: Without dead ends: 19 [2022-03-20 19:00:50,166 INFO L912 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 [2022-03-20 19:00:50,169 INFO L913 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 [2022-03-20 19:00:50,169 INFO L914 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] [2022-03-20 19:00:50,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-03-20 19:00:50,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-03-20 19:00:50,172 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) [2022-03-20 19:00:50,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-03-20 19:00:50,173 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2022-03-20 19:00:50,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:00:50,173 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-03-20 19:00:50,173 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) [2022-03-20 19:00:50,173 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-03-20 19:00:50,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 19:00:50,173 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:00:50,174 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:00:50,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 19:00:50,387 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 [2022-03-20 19:00:50,388 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:00:50,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:00:50,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1870563496, now seen corresponding path program 3 times [2022-03-20 19:00:50,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:00:50,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [313743110] [2022-03-20 19:00:50,663 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:00:50,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1090942768, now seen corresponding path program 1 times [2022-03-20 19:00:50,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:00:50,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668352143] [2022-03-20 19:00:50,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:00:50,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:00:50,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:00:50,670 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:00:50,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:00:50,675 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:00:50,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1870563496, now seen corresponding path program 4 times [2022-03-20 19:00:50,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:00:50,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714679027] [2022-03-20 19:00:50,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:00:50,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:00:50,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:00:50,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:00:50,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:00:50,707 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:00:50,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:00:50,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714679027] [2022-03-20 19:00:50,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714679027] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:00:50,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962896865] [2022-03-20 19:00:50,708 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:00:50,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:00:50,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:00:50,709 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:00:50,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 19:00:50,733 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:00:50,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:00:50,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 19:00:50,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:00:50,769 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:00:50,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:00:50,836 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:00:50,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962896865] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:00:50,836 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:00:50,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-03-20 19:00:50,837 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:00:50,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [313743110] [2022-03-20 19:00:50,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [313743110] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:00:50,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:00:50,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:00:50,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444191938] [2022-03-20 19:00:50,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:00:50,839 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 19:00:50,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:00:50,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 19:00:50,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-03-20 19:00:50,841 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:00:50,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:00:50,886 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2022-03-20 19:00:50,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 19:00:50,887 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 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 [2022-03-20 19:00:50,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:00:50,887 INFO L225 Difference]: With dead ends: 28 [2022-03-20 19:00:50,887 INFO L226 Difference]: Without dead ends: 21 [2022-03-20 19:00:50,888 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2022-03-20 19:00:50,888 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:00:50,889 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 19 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:00:50,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-03-20 19:00:50,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-03-20 19:00:50,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 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) [2022-03-20 19:00:50,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-03-20 19:00:50,896 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 17 [2022-03-20 19:00:50,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:00:50,896 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-03-20 19:00:50,898 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:00:50,898 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-03-20 19:00:50,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-20 19:00:50,899 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:00:50,899 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:00:50,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 19:00:51,115 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 [2022-03-20 19:00:51,116 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:00:51,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:00:51,117 INFO L85 PathProgramCache]: Analyzing trace with hash -402805515, now seen corresponding path program 5 times [2022-03-20 19:00:51,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:00:51,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [561824647] [2022-03-20 19:00:51,335 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:00:51,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1031837424, now seen corresponding path program 1 times [2022-03-20 19:00:51,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:00:51,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562118406] [2022-03-20 19:00:51,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:00:51,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:00:51,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:00:51,343 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:00:51,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:00:51,347 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:00:51,348 INFO L85 PathProgramCache]: Analyzing trace with hash -402805515, now seen corresponding path program 6 times [2022-03-20 19:00:51,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:00:51,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202464116] [2022-03-20 19:00:51,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:00:51,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:00:51,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:00:51,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:00:51,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:00:51,395 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:00:51,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:00:51,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202464116] [2022-03-20 19:00:51,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202464116] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:00:51,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174400080] [2022-03-20 19:00:51,396 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 19:00:51,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:00:51,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:00:51,412 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:00:51,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 19:00:51,441 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-20 19:00:51,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:00:51,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 19:00:51,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:00:51,498 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 19:00:51,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:00:51,555 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 19:00:51,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174400080] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:00:51,556 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:00:51,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 13 [2022-03-20 19:00:51,556 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:00:51,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [561824647] [2022-03-20 19:00:51,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [561824647] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:00:51,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:00:51,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 19:00:51,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99115425] [2022-03-20 19:00:51,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:00:51,558 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 19:00:51,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:00:51,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 19:00:51,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-03-20 19:00:51,558 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 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) [2022-03-20 19:00:51,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:00:51,622 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2022-03-20 19:00:51,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 19:00:51,623 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 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 [2022-03-20 19:00:51,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:00:51,625 INFO L225 Difference]: With dead ends: 30 [2022-03-20 19:00:51,625 INFO L226 Difference]: Without dead ends: 23 [2022-03-20 19:00:51,625 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=152, Unknown=0, NotChecked=0, Total=272 [2022-03-20 19:00:51,628 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 12 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:00:51,629 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 24 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:00:51,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-20 19:00:51,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-03-20 19:00:51,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 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) [2022-03-20 19:00:51,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2022-03-20 19:00:51,637 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 19 [2022-03-20 19:00:51,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:00:51,637 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2022-03-20 19:00:51,638 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 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) [2022-03-20 19:00:51,638 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2022-03-20 19:00:51,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-20 19:00:51,638 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:00:51,638 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:00:51,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 19:00:51,855 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 [2022-03-20 19:00:51,855 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:00:51,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:00:51,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1363341138, now seen corresponding path program 7 times [2022-03-20 19:00:51,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:00:51,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [67262513] [2022-03-20 19:00:52,050 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:00:52,050 INFO L85 PathProgramCache]: Analyzing trace with hash -972732080, now seen corresponding path program 1 times [2022-03-20 19:00:52,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:00:52,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069870109] [2022-03-20 19:00:52,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:00:52,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:00:52,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:00:52,055 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:00:52,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:00:52,067 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:00:52,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1363341138, now seen corresponding path program 8 times [2022-03-20 19:00:52,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:00:52,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274583389] [2022-03-20 19:00:52,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:00:52,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:00:52,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:00:52,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:00:52,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:00:52,113 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:00:52,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:00:52,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274583389] [2022-03-20 19:00:52,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274583389] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:00:52,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855726736] [2022-03-20 19:00:52,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:00:52,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:00:52,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:00:52,115 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:00:52,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 19:00:52,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:00:52,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:00:52,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 19:00:52,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:00:52,199 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:00:52,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:00:52,254 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:00:52,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855726736] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:00:52,254 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:00:52,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-03-20 19:00:52,254 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:00:52,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [67262513] [2022-03-20 19:00:52,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [67262513] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:00:52,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:00:52,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 19:00:52,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885737287] [2022-03-20 19:00:52,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:00:52,255 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 19:00:52,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:00:52,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 19:00:52,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-03-20 19:00:52,255 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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) [2022-03-20 19:00:52,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:00:52,303 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-03-20 19:00:52,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 19:00:52,304 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 [2022-03-20 19:00:52,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:00:52,304 INFO L225 Difference]: With dead ends: 32 [2022-03-20 19:00:52,304 INFO L226 Difference]: Without dead ends: 25 [2022-03-20 19:00:52,305 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=196, Unknown=0, NotChecked=0, Total=342 [2022-03-20 19:00:52,305 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:00:52,306 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 24 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:00:52,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-03-20 19:00:52,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-03-20 19:00:52,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 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) [2022-03-20 19:00:52,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2022-03-20 19:00:52,312 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 21 [2022-03-20 19:00:52,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:00:52,312 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2022-03-20 19:00:52,312 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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) [2022-03-20 19:00:52,312 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-03-20 19:00:52,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 19:00:52,313 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:00:52,313 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:00:52,329 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-20 19:00:52,531 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 [2022-03-20 19:00:52,531 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:00:52,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:00:52,532 INFO L85 PathProgramCache]: Analyzing trace with hash 2118192751, now seen corresponding path program 9 times [2022-03-20 19:00:52,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:00:52,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [982701674] [2022-03-20 19:00:52,752 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:00:52,753 INFO L85 PathProgramCache]: Analyzing trace with hash -913626736, now seen corresponding path program 1 times [2022-03-20 19:00:52,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:00:52,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294745667] [2022-03-20 19:00:52,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:00:52,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:00:52,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:00:52,758 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:00:52,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:00:52,762 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:00:52,762 INFO L85 PathProgramCache]: Analyzing trace with hash 2118192751, now seen corresponding path program 10 times [2022-03-20 19:00:52,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:00:52,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585512138] [2022-03-20 19:00:52,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:00:52,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:00:52,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:00:52,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:00:52,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:00:52,800 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:00:52,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:00:52,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585512138] [2022-03-20 19:00:52,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585512138] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:00:52,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346709614] [2022-03-20 19:00:52,801 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:00:52,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:00:52,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:00:52,802 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:00:52,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 19:00:52,845 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:00:52,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:00:52,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 19:00:52,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:00:52,881 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:00:52,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:00:52,959 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:00:52,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346709614] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:00:52,960 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:00:52,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-03-20 19:00:52,960 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:00:52,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [982701674] [2022-03-20 19:00:52,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [982701674] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:00:52,960 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:00:52,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 19:00:52,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932949700] [2022-03-20 19:00:52,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:00:52,961 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 19:00:52,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:00:52,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 19:00:52,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2022-03-20 19:00:52,961 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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) [2022-03-20 19:00:53,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:00:53,014 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-03-20 19:00:53,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 19:00:53,014 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 [2022-03-20 19:00:53,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:00:53,014 INFO L225 Difference]: With dead ends: 34 [2022-03-20 19:00:53,014 INFO L226 Difference]: Without dead ends: 27 [2022-03-20 19:00:53,015 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=198, Invalid=264, Unknown=0, NotChecked=0, Total=462 [2022-03-20 19:00:53,015 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 14 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:00:53,015 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 24 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:00:53,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-20 19:00:53,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-03-20 19:00:53,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 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) [2022-03-20 19:00:53,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2022-03-20 19:00:53,018 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 23 [2022-03-20 19:00:53,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:00:53,018 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2022-03-20 19:00:53,018 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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) [2022-03-20 19:00:53,019 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2022-03-20 19:00:53,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-20 19:00:53,019 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:00:53,019 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:00:53,035 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-20 19:00:53,233 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 [2022-03-20 19:00:53,233 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:00:53,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:00:53,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1681119820, now seen corresponding path program 11 times [2022-03-20 19:00:53,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:00:53,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [623214181] [2022-03-20 19:00:53,428 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:00:53,428 INFO L85 PathProgramCache]: Analyzing trace with hash -854521392, now seen corresponding path program 1 times [2022-03-20 19:00:53,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:00:53,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426374302] [2022-03-20 19:00:53,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:00:53,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:00:53,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:00:53,432 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:00:53,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:00:53,436 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:00:53,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1681119820, now seen corresponding path program 12 times [2022-03-20 19:00:53,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:00:53,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796575151] [2022-03-20 19:00:53,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:00:53,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:00:53,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:00:53,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:00:53,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:00:53,480 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:00:53,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:00:53,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796575151] [2022-03-20 19:00:53,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796575151] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:00:53,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154365845] [2022-03-20 19:00:53,480 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 19:00:53,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:00:53,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:00:53,481 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:00:53,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 19:00:53,506 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 19:00:53,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:00:53,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 19:00:53,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:00:53,563 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 19:00:53,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:00:53,641 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 19:00:53,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154365845] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:00:53,641 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:00:53,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 18 [2022-03-20 19:00:53,642 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:00:53,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [623214181] [2022-03-20 19:00:53,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [623214181] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:00:53,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:00:53,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 19:00:53,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968580038] [2022-03-20 19:00:53,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:00:53,642 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 19:00:53,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:00:53,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 19:00:53,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-03-20 19:00:53,643 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2022-03-20 19:00:53,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:00:53,711 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2022-03-20 19:00:53,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 19:00:53,711 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 [2022-03-20 19:00:53,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:00:53,712 INFO L225 Difference]: With dead ends: 36 [2022-03-20 19:00:53,712 INFO L226 Difference]: Without dead ends: 29 [2022-03-20 19:00:53,713 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=264, Invalid=336, Unknown=0, NotChecked=0, Total=600 [2022-03-20 19:00:53,714 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 15 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:00:53,715 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 29 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:00:53,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-03-20 19:00:53,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-03-20 19:00:53,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 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) [2022-03-20 19:00:53,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-03-20 19:00:53,720 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 25 [2022-03-20 19:00:53,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:00:53,721 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-03-20 19:00:53,721 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2022-03-20 19:00:53,721 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-03-20 19:00:53,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-20 19:00:53,722 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:00:53,722 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:00:53,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 19:00:53,935 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 [2022-03-20 19:00:53,936 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:00:53,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:00:53,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1734139159, now seen corresponding path program 13 times [2022-03-20 19:00:53,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:00:53,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1006700243] [2022-03-20 19:00:54,082 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:00:54,083 INFO L85 PathProgramCache]: Analyzing trace with hash -795416048, now seen corresponding path program 1 times [2022-03-20 19:00:54,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:00:54,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903456918] [2022-03-20 19:00:54,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:00:54,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:00:54,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:00:54,086 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:00:54,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:00:54,090 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:00:54,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1734139159, now seen corresponding path program 14 times [2022-03-20 19:00:54,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:00:54,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079071903] [2022-03-20 19:00:54,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:00:54,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:00:54,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:00:54,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:00:54,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:00:54,153 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:00:54,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:00:54,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079071903] [2022-03-20 19:00:54,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079071903] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:00:54,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043420046] [2022-03-20 19:00:54,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:00:54,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:00:54,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:00:54,154 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:00:54,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 19:00:54,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:00:54,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:00:54,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 19:00:54,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:00:54,221 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:00:54,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:00:54,321 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:00:54,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043420046] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:00:54,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:00:54,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 20 [2022-03-20 19:00:54,322 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:00:54,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1006700243] [2022-03-20 19:00:54,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1006700243] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:00:54,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:00:54,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 19:00:54,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687874296] [2022-03-20 19:00:54,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:00:54,323 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 19:00:54,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:00:54,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 19:00:54,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2022-03-20 19:00:54,323 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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) [2022-03-20 19:00:54,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:00:54,406 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2022-03-20 19:00:54,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 19:00:54,407 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 [2022-03-20 19:00:54,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:00:54,407 INFO L225 Difference]: With dead ends: 38 [2022-03-20 19:00:54,407 INFO L226 Difference]: Without dead ends: 31 [2022-03-20 19:00:54,408 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=326, Invalid=430, Unknown=0, NotChecked=0, Total=756 [2022-03-20 19:00:54,408 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 16 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:00:54,408 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 34 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:00:54,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-20 19:00:54,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-03-20 19:00:54,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 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) [2022-03-20 19:00:54,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2022-03-20 19:00:54,411 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 27 [2022-03-20 19:00:54,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:00:54,411 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2022-03-20 19:00:54,411 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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) [2022-03-20 19:00:54,411 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2022-03-20 19:00:54,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 19:00:54,411 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:00:54,412 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:00:54,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 19:00:54,627 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 [2022-03-20 19:00:54,628 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:00:54,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:00:54,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1851963462, now seen corresponding path program 15 times [2022-03-20 19:00:54,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:00:54,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [129318969] [2022-03-20 19:00:54,840 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:00:54,840 INFO L85 PathProgramCache]: Analyzing trace with hash -736310704, now seen corresponding path program 1 times [2022-03-20 19:00:54,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:00:54,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615055919] [2022-03-20 19:00:54,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:00:54,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:00:54,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:00:54,844 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:00:54,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:00:54,847 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:00:54,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1851963462, now seen corresponding path program 16 times [2022-03-20 19:00:54,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:00:54,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590392894] [2022-03-20 19:00:54,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:00:54,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:00:54,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:00:54,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:00:54,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:00:54,907 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:00:54,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:00:54,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590392894] [2022-03-20 19:00:54,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590392894] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:00:54,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574756547] [2022-03-20 19:00:54,907 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:00:54,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:00:54,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:00:54,908 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:00:54,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 19:00:54,939 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:00:54,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:00:54,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-20 19:00:54,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:00:54,990 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:00:54,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:00:55,116 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:00:55,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574756547] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:00:55,117 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:00:55,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 22 [2022-03-20 19:00:55,117 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:00:55,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [129318969] [2022-03-20 19:00:55,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [129318969] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:00:55,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:00:55,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 19:00:55,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246305485] [2022-03-20 19:00:55,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:00:55,117 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 19:00:55,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:00:55,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 19:00:55,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2022-03-20 19:00:55,118 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 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) [2022-03-20 19:00:55,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:00:55,202 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2022-03-20 19:00:55,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 19:00:55,203 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 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 [2022-03-20 19:00:55,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:00:55,203 INFO L225 Difference]: With dead ends: 40 [2022-03-20 19:00:55,203 INFO L226 Difference]: Without dead ends: 33 [2022-03-20 19:00:55,204 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=402, Invalid=528, Unknown=0, NotChecked=0, Total=930 [2022-03-20 19:00:55,204 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 17 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:00:55,204 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 34 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:00:55,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-20 19:00:55,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-03-20 19:00:55,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 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) [2022-03-20 19:00:55,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2022-03-20 19:00:55,207 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 29 [2022-03-20 19:00:55,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:00:55,208 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2022-03-20 19:00:55,208 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 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) [2022-03-20 19:00:55,208 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2022-03-20 19:00:55,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-20 19:00:55,208 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:00:55,208 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:00:55,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 19:00:55,417 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 [2022-03-20 19:00:55,418 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:00:55,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:00:55,418 INFO L85 PathProgramCache]: Analyzing trace with hash -762156445, now seen corresponding path program 17 times [2022-03-20 19:00:55,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:00:55,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [827906341] [2022-03-20 19:00:55,603 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:00:55,603 INFO L85 PathProgramCache]: Analyzing trace with hash -677205360, now seen corresponding path program 1 times [2022-03-20 19:00:55,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:00:55,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043254385] [2022-03-20 19:00:55,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:00:55,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:00:55,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:00:55,606 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:00:55,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:00:55,609 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:00:55,609 INFO L85 PathProgramCache]: Analyzing trace with hash -762156445, now seen corresponding path program 18 times [2022-03-20 19:00:55,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:00:55,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882769843] [2022-03-20 19:00:55,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:00:55,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:00:55,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:00:55,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:00:55,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:00:55,671 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:00:55,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:00:55,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882769843] [2022-03-20 19:00:55,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882769843] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:00:55,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217920931] [2022-03-20 19:00:55,671 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 19:00:55,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:00:55,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:00:55,673 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:00:55,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 19:00:55,701 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 19:00:55,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:00:55,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 19:00:55,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:00:55,749 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-03-20 19:00:55,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:00:55,811 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-03-20 19:00:55,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217920931] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:00:55,811 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:00:55,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4, 4] total 17 [2022-03-20 19:00:55,812 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:00:55,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [827906341] [2022-03-20 19:00:55,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [827906341] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:00:55,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:00:55,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 19:00:55,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024560951] [2022-03-20 19:00:55,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:00:55,812 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 19:00:55,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:00:55,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 19:00:55,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2022-03-20 19:00:55,813 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:00:55,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:00:55,913 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2022-03-20 19:00:55,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 19:00:55,913 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-03-20 19:00:55,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:00:55,914 INFO L225 Difference]: With dead ends: 42 [2022-03-20 19:00:55,914 INFO L226 Difference]: Without dead ends: 35 [2022-03-20 19:00:55,914 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=292, Invalid=410, Unknown=0, NotChecked=0, Total=702 [2022-03-20 19:00:55,915 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 18 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:00:55,915 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 34 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:00:55,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-20 19:00:55,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-03-20 19:00:55,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 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) [2022-03-20 19:00:55,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2022-03-20 19:00:55,918 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 31 [2022-03-20 19:00:55,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:00:55,918 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2022-03-20 19:00:55,918 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:00:55,918 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2022-03-20 19:00:55,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 19:00:55,918 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:00:55,918 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:00:55,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 19:00:56,135 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 [2022-03-20 19:00:56,135 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:00:56,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:00:56,135 INFO L85 PathProgramCache]: Analyzing trace with hash -375518912, now seen corresponding path program 19 times [2022-03-20 19:00:56,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:00:56,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1482649543] [2022-03-20 19:00:56,300 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:00:56,301 INFO L85 PathProgramCache]: Analyzing trace with hash -618100016, now seen corresponding path program 1 times [2022-03-20 19:00:56,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:00:56,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842893834] [2022-03-20 19:00:56,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:00:56,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:00:56,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:00:56,305 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:00:56,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:00:56,307 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:00:56,307 INFO L85 PathProgramCache]: Analyzing trace with hash -375518912, now seen corresponding path program 20 times [2022-03-20 19:00:56,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:00:56,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833338708] [2022-03-20 19:00:56,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:00:56,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:00:56,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:00:56,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:00:56,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:00:56,406 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:00:56,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:00:56,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833338708] [2022-03-20 19:00:56,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833338708] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:00:56,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758415268] [2022-03-20 19:00:56,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:00:56,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:00:56,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:00:56,407 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:00:56,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 19:00:56,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:00:56,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:00:56,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 19:00:56,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:00:56,493 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:00:56,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:00:56,659 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:00:56,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758415268] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:00:56,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:00:56,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-03-20 19:00:56,660 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:00:56,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1482649543] [2022-03-20 19:00:56,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1482649543] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:00:56,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:00:56,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 19:00:56,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331118797] [2022-03-20 19:00:56,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:00:56,660 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 19:00:56,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:00:56,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 19:00:56,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-03-20 19:00:56,661 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 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) [2022-03-20 19:00:56,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:00:56,762 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2022-03-20 19:00:56,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 19:00:56,763 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 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 [2022-03-20 19:00:56,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:00:56,763 INFO L225 Difference]: With dead ends: 44 [2022-03-20 19:00:56,763 INFO L226 Difference]: Without dead ends: 37 [2022-03-20 19:00:56,764 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=578, Invalid=754, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 19:00:56,764 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 19 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:00:56,764 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 24 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:00:56,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-20 19:00:56,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-03-20 19:00:56,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 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) [2022-03-20 19:00:56,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2022-03-20 19:00:56,767 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 33 [2022-03-20 19:00:56,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:00:56,767 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2022-03-20 19:00:56,767 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 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) [2022-03-20 19:00:56,767 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2022-03-20 19:00:56,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-20 19:00:56,768 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:00:56,768 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:00:56,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 19:00:56,984 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 [2022-03-20 19:00:56,985 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:00:56,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:00:56,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1815962845, now seen corresponding path program 21 times [2022-03-20 19:00:56,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:00:56,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1776134548] [2022-03-20 19:00:57,197 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:00:57,197 INFO L85 PathProgramCache]: Analyzing trace with hash -558994672, now seen corresponding path program 1 times [2022-03-20 19:00:57,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:00:57,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132730735] [2022-03-20 19:00:57,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:00:57,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:00:57,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:00:57,200 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:00:57,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:00:57,203 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:00:57,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1815962845, now seen corresponding path program 22 times [2022-03-20 19:00:57,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:00:57,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308158502] [2022-03-20 19:00:57,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:00:57,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:00:57,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:00:57,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:00:57,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:00:57,292 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:00:57,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:00:57,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308158502] [2022-03-20 19:00:57,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308158502] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:00:57,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961855359] [2022-03-20 19:00:57,293 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:00:57,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:00:57,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:00:57,294 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:00:57,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 19:00:57,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:00:57,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:00:57,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 19:00:57,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:00:57,374 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:00:57,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:00:57,584 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:00:57,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961855359] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:00:57,584 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:00:57,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 28 [2022-03-20 19:00:57,584 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:00:57,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1776134548] [2022-03-20 19:00:57,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1776134548] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:00:57,584 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:00:57,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 19:00:57,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427697936] [2022-03-20 19:00:57,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:00:57,585 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 19:00:57,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:00:57,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 19:00:57,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2022-03-20 19:00:57,586 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 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) [2022-03-20 19:00:57,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:00:57,704 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2022-03-20 19:00:57,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 19:00:57,705 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 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 [2022-03-20 19:00:57,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:00:57,706 INFO L225 Difference]: With dead ends: 46 [2022-03-20 19:00:57,706 INFO L226 Difference]: Without dead ends: 39 [2022-03-20 19:00:57,706 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=678, Invalid=882, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 19:00:57,706 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 20 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:00:57,707 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 34 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:00:57,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-20 19:00:57,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-03-20 19:00:57,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.088235294117647) internal successors, (37), 34 states have internal predecessors, (37), 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) [2022-03-20 19:00:57,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2022-03-20 19:00:57,709 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 35 [2022-03-20 19:00:57,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:00:57,710 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2022-03-20 19:00:57,710 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 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) [2022-03-20 19:00:57,710 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2022-03-20 19:00:57,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-20 19:00:57,710 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:00:57,710 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:00:57,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 19:00:57,911 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 [2022-03-20 19:00:57,911 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:00:57,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:00:57,911 INFO L85 PathProgramCache]: Analyzing trace with hash -999011014, now seen corresponding path program 23 times [2022-03-20 19:00:57,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:00:57,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [120010480] [2022-03-20 19:00:58,064 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:00:58,065 INFO L85 PathProgramCache]: Analyzing trace with hash -499889328, now seen corresponding path program 1 times [2022-03-20 19:00:58,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:00:58,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842241370] [2022-03-20 19:00:58,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:00:58,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:00:58,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:00:58,068 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:00:58,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:00:58,071 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:00:58,071 INFO L85 PathProgramCache]: Analyzing trace with hash -999011014, now seen corresponding path program 24 times [2022-03-20 19:00:58,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:00:58,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731892374] [2022-03-20 19:00:58,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:00:58,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:00:58,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:00:58,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:00:58,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:00:58,171 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:00:58,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:00:58,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731892374] [2022-03-20 19:00:58,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731892374] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:00:58,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664394681] [2022-03-20 19:00:58,172 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 19:00:58,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:00:58,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:00:58,173 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:00:58,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 19:00:58,199 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 19:00:58,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:00:58,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 19:00:58,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:00:58,267 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-03-20 19:00:58,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:00:58,331 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-03-20 19:00:58,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664394681] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:00:58,331 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:00:58,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 4, 4] total 20 [2022-03-20 19:00:58,331 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:00:58,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [120010480] [2022-03-20 19:00:58,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [120010480] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:00:58,332 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:00:58,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 19:00:58,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782971878] [2022-03-20 19:00:58,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:00:58,332 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 19:00:58,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:00:58,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 19:00:58,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2022-03-20 19:00:58,333 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:00:58,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:00:58,472 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2022-03-20 19:00:58,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 19:00:58,473 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-03-20 19:00:58,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:00:58,473 INFO L225 Difference]: With dead ends: 48 [2022-03-20 19:00:58,473 INFO L226 Difference]: Without dead ends: 41 [2022-03-20 19:00:58,474 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=433, Invalid=623, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 19:00:58,474 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 21 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:00:58,474 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 34 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:00:58,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-20 19:00:58,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-03-20 19:00:58,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 36 states have internal predecessors, (39), 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) [2022-03-20 19:00:58,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2022-03-20 19:00:58,477 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 37 [2022-03-20 19:00:58,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:00:58,477 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2022-03-20 19:00:58,477 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:00:58,478 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2022-03-20 19:00:58,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-20 19:00:58,478 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:00:58,478 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:00:58,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 19:00:58,678 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 [2022-03-20 19:00:58,679 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:00:58,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:00:58,679 INFO L85 PathProgramCache]: Analyzing trace with hash -359493033, now seen corresponding path program 25 times [2022-03-20 19:00:58,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:00:58,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [256459152] [2022-03-20 19:00:58,881 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:00:58,881 INFO L85 PathProgramCache]: Analyzing trace with hash -440783984, now seen corresponding path program 1 times [2022-03-20 19:00:58,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:00:58,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183410807] [2022-03-20 19:00:58,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:00:58,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:00:58,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:00:58,901 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:00:58,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:00:58,904 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:00:58,904 INFO L85 PathProgramCache]: Analyzing trace with hash -359493033, now seen corresponding path program 26 times [2022-03-20 19:00:58,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:00:58,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818019863] [2022-03-20 19:00:58,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:00:58,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:00:58,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:00:58,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:00:58,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:00:58,999 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:00:58,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:00:58,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818019863] [2022-03-20 19:00:58,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818019863] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:00:58,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338632155] [2022-03-20 19:00:58,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:00:59,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:00:59,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:00:59,016 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:00:59,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 19:00:59,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:00:59,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:00:59,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 19:00:59,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:00:59,103 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:00:59,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:00:59,287 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:00:59,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338632155] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:00:59,287 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:00:59,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 32 [2022-03-20 19:00:59,287 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:00:59,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [256459152] [2022-03-20 19:00:59,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [256459152] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:00:59,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:00:59,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 19:00:59,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859198503] [2022-03-20 19:00:59,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:00:59,291 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 19:00:59,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:00:59,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 19:00:59,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-03-20 19:00:59,292 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 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) [2022-03-20 19:00:59,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:00:59,457 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2022-03-20 19:00:59,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 19:00:59,457 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 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 [2022-03-20 19:00:59,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:00:59,458 INFO L225 Difference]: With dead ends: 50 [2022-03-20 19:00:59,458 INFO L226 Difference]: Without dead ends: 43 [2022-03-20 19:00:59,459 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=902, Invalid=1168, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 19:00:59,459 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 22 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:00:59,459 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 19 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:00:59,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-20 19:00:59,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-03-20 19:00:59,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 states have internal predecessors, (41), 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) [2022-03-20 19:00:59,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2022-03-20 19:00:59,462 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 39 [2022-03-20 19:00:59,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:00:59,462 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2022-03-20 19:00:59,462 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 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) [2022-03-20 19:00:59,462 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2022-03-20 19:00:59,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-20 19:00:59,463 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:00:59,463 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:00:59,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-20 19:00:59,680 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 [2022-03-20 19:00:59,680 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:00:59,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:00:59,680 INFO L85 PathProgramCache]: Analyzing trace with hash 36963380, now seen corresponding path program 27 times [2022-03-20 19:00:59,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:00:59,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1928770070] [2022-03-20 19:00:59,873 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:00:59,874 INFO L85 PathProgramCache]: Analyzing trace with hash -381678640, now seen corresponding path program 1 times [2022-03-20 19:00:59,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:00:59,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972096957] [2022-03-20 19:00:59,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:00:59,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:00:59,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:00:59,877 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:00:59,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:00:59,883 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:00:59,883 INFO L85 PathProgramCache]: Analyzing trace with hash 36963380, now seen corresponding path program 28 times [2022-03-20 19:00:59,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:00:59,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939778735] [2022-03-20 19:00:59,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:00:59,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:00:59,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:00,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:00,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:00,013 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:00,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:00,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939778735] [2022-03-20 19:01:00,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939778735] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:01:00,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146855839] [2022-03-20 19:01:00,014 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:01:00,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:01:00,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:01:00,020 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:01:00,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 19:01:00,045 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:01:00,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:01:00,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-20 19:01:00,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:01:00,113 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:00,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:01:00,398 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:00,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146855839] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:01:00,398 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:01:00,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 34 [2022-03-20 19:01:00,399 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:00,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1928770070] [2022-03-20 19:01:00,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1928770070] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:00,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:00,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 19:01:00,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131673209] [2022-03-20 19:01:00,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:00,400 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 19:01:00,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:00,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 19:01:00,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 19:01:00,404 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 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) [2022-03-20 19:01:00,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:00,575 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2022-03-20 19:01:00,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 19:01:00,575 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 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 [2022-03-20 19:01:00,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:00,576 INFO L225 Difference]: With dead ends: 52 [2022-03-20 19:01:00,576 INFO L226 Difference]: Without dead ends: 45 [2022-03-20 19:01:00,577 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1026, Invalid=1326, Unknown=0, NotChecked=0, Total=2352 [2022-03-20 19:01:00,577 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 23 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 34 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 [2022-03-20 19:01:00,577 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 34 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:01:00,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-20 19:01:00,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-03-20 19:01:00,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.075) internal successors, (43), 40 states have internal predecessors, (43), 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) [2022-03-20 19:01:00,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2022-03-20 19:01:00,581 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 41 [2022-03-20 19:01:00,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:00,581 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2022-03-20 19:01:00,581 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 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) [2022-03-20 19:01:00,581 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2022-03-20 19:01:00,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-20 19:01:00,581 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:00,581 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:00,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-20 19:01:00,791 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 [2022-03-20 19:01:00,791 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:00,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:00,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1220513071, now seen corresponding path program 29 times [2022-03-20 19:01:00,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:00,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [466191543] [2022-03-20 19:01:00,974 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:01:00,975 INFO L85 PathProgramCache]: Analyzing trace with hash -322573296, now seen corresponding path program 1 times [2022-03-20 19:01:00,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:00,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231115555] [2022-03-20 19:01:00,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:00,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:00,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:01:00,978 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:01:00,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:01:00,980 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:01:00,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1220513071, now seen corresponding path program 30 times [2022-03-20 19:01:00,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:00,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413792034] [2022-03-20 19:01:00,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:00,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:00,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:01,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:01,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:01,116 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:01,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:01,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413792034] [2022-03-20 19:01:01,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413792034] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:01:01,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011801587] [2022-03-20 19:01:01,116 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 19:01:01,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:01:01,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:01:01,122 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:01:01,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-20 19:01:01,146 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 19:01:01,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:01:01,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 19:01:01,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:01:01,212 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 45 proven. 1 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-03-20 19:01:01,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:01:01,274 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 45 proven. 1 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-03-20 19:01:01,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011801587] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:01:01,275 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:01:01,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 4, 4] total 23 [2022-03-20 19:01:01,275 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:01,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [466191543] [2022-03-20 19:01:01,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [466191543] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:01,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:01,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 19:01:01,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227551023] [2022-03-20 19:01:01,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:01,275 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 19:01:01,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:01,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 19:01:01,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2022-03-20 19:01:01,276 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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) [2022-03-20 19:01:01,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:01,441 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2022-03-20 19:01:01,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 19:01:01,441 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 [2022-03-20 19:01:01,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:01,442 INFO L225 Difference]: With dead ends: 54 [2022-03-20 19:01:01,442 INFO L226 Difference]: Without dead ends: 47 [2022-03-20 19:01:01,442 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=601, Invalid=881, Unknown=0, NotChecked=0, Total=1482 [2022-03-20 19:01:01,442 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 24 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:01,443 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 29 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:01:01,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-20 19:01:01,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-03-20 19:01:01,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 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) [2022-03-20 19:01:01,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2022-03-20 19:01:01,445 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 43 [2022-03-20 19:01:01,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:01,445 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2022-03-20 19:01:01,446 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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) [2022-03-20 19:01:01,446 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2022-03-20 19:01:01,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-20 19:01:01,446 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:01,446 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:01,475 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-03-20 19:01:01,655 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 [2022-03-20 19:01:01,655 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:01,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:01,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1525394990, now seen corresponding path program 31 times [2022-03-20 19:01:01,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:01,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [101450772] [2022-03-20 19:01:01,839 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:01:01,839 INFO L85 PathProgramCache]: Analyzing trace with hash -263467952, now seen corresponding path program 1 times [2022-03-20 19:01:01,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:01,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713450785] [2022-03-20 19:01:01,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:01,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:01,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:01:01,842 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:01:01,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:01:01,844 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:01:01,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1525394990, now seen corresponding path program 32 times [2022-03-20 19:01:01,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:01,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115170141] [2022-03-20 19:01:01,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:01,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:01,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:01,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:01,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:01,978 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 17 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:01,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:01,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115170141] [2022-03-20 19:01:01,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115170141] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:01:01,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176091302] [2022-03-20 19:01:01,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:01:01,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:01:01,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:01:01,993 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:01:01,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-20 19:01:02,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:01:02,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:01:02,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-20 19:01:02,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:01:02,080 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 17 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:02,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:01:02,357 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 17 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:02,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176091302] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:01:02,357 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:01:02,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 38 [2022-03-20 19:01:02,358 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:02,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [101450772] [2022-03-20 19:01:02,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [101450772] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:02,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:02,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 19:01:02,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651186123] [2022-03-20 19:01:02,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:02,359 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 19:01:02,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:02,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 19:01:02,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 19:01:02,360 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 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) [2022-03-20 19:01:02,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:02,534 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2022-03-20 19:01:02,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 19:01:02,534 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 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 [2022-03-20 19:01:02,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:02,534 INFO L225 Difference]: With dead ends: 56 [2022-03-20 19:01:02,535 INFO L226 Difference]: Without dead ends: 49 [2022-03-20 19:01:02,535 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1298, Invalid=1672, Unknown=0, NotChecked=0, Total=2970 [2022-03-20 19:01:02,536 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 25 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:02,536 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 19 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:01:02,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-03-20 19:01:02,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-03-20 19:01:02,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 44 states have internal predecessors, (47), 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) [2022-03-20 19:01:02,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2022-03-20 19:01:02,539 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 45 [2022-03-20 19:01:02,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:02,539 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2022-03-20 19:01:02,539 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 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) [2022-03-20 19:01:02,539 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2022-03-20 19:01:02,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-20 19:01:02,539 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:02,539 INFO L499 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:02,556 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-03-20 19:01:02,747 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 [2022-03-20 19:01:02,747 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:02,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:02,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1061845429, now seen corresponding path program 33 times [2022-03-20 19:01:02,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:02,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1868994435] [2022-03-20 19:01:02,899 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:01:02,900 INFO L85 PathProgramCache]: Analyzing trace with hash -204362608, now seen corresponding path program 1 times [2022-03-20 19:01:02,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:02,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525755035] [2022-03-20 19:01:02,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:02,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:02,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:01:02,910 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:01:02,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:01:02,918 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:01:02,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1061845429, now seen corresponding path program 34 times [2022-03-20 19:01:02,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:02,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637987788] [2022-03-20 19:01:02,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:02,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:02,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:03,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:03,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:03,032 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 18 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:03,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:03,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637987788] [2022-03-20 19:01:03,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637987788] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:01:03,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557620741] [2022-03-20 19:01:03,032 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:01:03,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:01:03,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:01:03,033 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:01:03,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-20 19:01:03,063 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:01:03,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:01:03,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 19:01:03,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:01:03,127 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 18 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:03,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:01:03,487 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 18 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:03,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557620741] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:01:03,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:01:03,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 40 [2022-03-20 19:01:03,487 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:03,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1868994435] [2022-03-20 19:01:03,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1868994435] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:03,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:03,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 19:01:03,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301458867] [2022-03-20 19:01:03,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:03,488 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 19:01:03,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:03,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 19:01:03,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 19:01:03,489 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 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) [2022-03-20 19:01:03,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:03,692 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2022-03-20 19:01:03,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 19:01:03,692 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 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 [2022-03-20 19:01:03,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:03,693 INFO L225 Difference]: With dead ends: 58 [2022-03-20 19:01:03,693 INFO L226 Difference]: Without dead ends: 51 [2022-03-20 19:01:03,694 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1446, Invalid=1860, Unknown=0, NotChecked=0, Total=3306 [2022-03-20 19:01:03,694 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 26 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:03,694 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 44 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:01:03,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-20 19:01:03,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-03-20 19:01:03,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.065217391304348) internal successors, (49), 46 states have internal predecessors, (49), 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) [2022-03-20 19:01:03,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2022-03-20 19:01:03,697 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 47 [2022-03-20 19:01:03,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:03,697 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2022-03-20 19:01:03,697 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 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) [2022-03-20 19:01:03,697 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2022-03-20 19:01:03,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-20 19:01:03,697 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:03,698 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:03,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-20 19:01:03,913 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 [2022-03-20 19:01:03,914 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:03,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:03,914 INFO L85 PathProgramCache]: Analyzing trace with hash -613823704, now seen corresponding path program 35 times [2022-03-20 19:01:03,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:03,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1818639662] [2022-03-20 19:01:04,068 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:01:04,068 INFO L85 PathProgramCache]: Analyzing trace with hash -145257264, now seen corresponding path program 1 times [2022-03-20 19:01:04,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:04,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900414848] [2022-03-20 19:01:04,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:04,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:04,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:01:04,071 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:01:04,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:01:04,073 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:01:04,073 INFO L85 PathProgramCache]: Analyzing trace with hash -613823704, now seen corresponding path program 36 times [2022-03-20 19:01:04,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:04,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571176531] [2022-03-20 19:01:04,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:04,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:04,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:04,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:04,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:04,240 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 19 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:04,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:04,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571176531] [2022-03-20 19:01:04,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571176531] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:01:04,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364501274] [2022-03-20 19:01:04,240 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 19:01:04,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:01:04,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:01:04,241 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:01:04,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-20 19:01:04,266 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 19:01:04,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:01:04,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 19:01:04,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:01:04,317 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 54 proven. 1 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2022-03-20 19:01:04,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:01:04,362 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 54 proven. 1 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2022-03-20 19:01:04,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364501274] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:01:04,363 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:01:04,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 4, 4] total 26 [2022-03-20 19:01:04,363 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:04,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1818639662] [2022-03-20 19:01:04,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1818639662] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:04,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:04,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-20 19:01:04,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539430292] [2022-03-20 19:01:04,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:04,364 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 19:01:04,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:04,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 19:01:04,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-03-20 19:01:04,364 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 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) [2022-03-20 19:01:04,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:04,535 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2022-03-20 19:01:04,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 19:01:04,536 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 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 [2022-03-20 19:01:04,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:04,536 INFO L225 Difference]: With dead ends: 60 [2022-03-20 19:01:04,536 INFO L226 Difference]: Without dead ends: 53 [2022-03-20 19:01:04,537 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=796, Invalid=1184, Unknown=0, NotChecked=0, Total=1980 [2022-03-20 19:01:04,537 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 27 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:04,537 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 29 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:01:04,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-03-20 19:01:04,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-03-20 19:01:04,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.0625) internal successors, (51), 48 states have internal predecessors, (51), 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) [2022-03-20 19:01:04,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2022-03-20 19:01:04,540 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 49 [2022-03-20 19:01:04,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:04,540 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2022-03-20 19:01:04,540 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 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) [2022-03-20 19:01:04,540 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2022-03-20 19:01:04,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-20 19:01:04,541 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:04,541 INFO L499 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:04,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-20 19:01:04,747 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 [2022-03-20 19:01:04,747 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:04,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:04,748 INFO L85 PathProgramCache]: Analyzing trace with hash 438324421, now seen corresponding path program 37 times [2022-03-20 19:01:04,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:04,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [693434087] [2022-03-20 19:01:04,937 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:01:04,937 INFO L85 PathProgramCache]: Analyzing trace with hash -86151920, now seen corresponding path program 1 times [2022-03-20 19:01:04,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:04,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325251195] [2022-03-20 19:01:04,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:04,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:04,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:01:04,940 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:01:04,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:01:04,943 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:01:04,943 INFO L85 PathProgramCache]: Analyzing trace with hash 438324421, now seen corresponding path program 38 times [2022-03-20 19:01:04,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:04,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278605867] [2022-03-20 19:01:04,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:04,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:04,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:05,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:05,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:05,204 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:05,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:05,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278605867] [2022-03-20 19:01:05,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278605867] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:01:05,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437431147] [2022-03-20 19:01:05,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:01:05,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:01:05,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:01:05,205 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:01:05,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-20 19:01:05,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:01:05,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:01:05,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 19:01:05,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:01:05,322 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:05,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:01:05,751 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:05,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437431147] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:01:05,751 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:01:05,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 44 [2022-03-20 19:01:05,751 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:05,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [693434087] [2022-03-20 19:01:05,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [693434087] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:05,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:05,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 19:01:05,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415101303] [2022-03-20 19:01:05,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:05,752 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 19:01:05,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:05,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 19:01:05,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2022-03-20 19:01:05,753 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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) [2022-03-20 19:01:05,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:05,910 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2022-03-20 19:01:05,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 19:01:05,912 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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 [2022-03-20 19:01:05,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:05,912 INFO L225 Difference]: With dead ends: 62 [2022-03-20 19:01:05,912 INFO L226 Difference]: Without dead ends: 55 [2022-03-20 19:01:05,914 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1766, Invalid=2266, Unknown=0, NotChecked=0, Total=4032 [2022-03-20 19:01:05,914 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 28 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:05,914 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 34 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:01:05,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-20 19:01:05,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-03-20 19:01:05,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.06) internal successors, (53), 50 states have internal predecessors, (53), 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) [2022-03-20 19:01:05,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2022-03-20 19:01:05,917 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 51 [2022-03-20 19:01:05,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:05,917 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2022-03-20 19:01:05,917 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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) [2022-03-20 19:01:05,917 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2022-03-20 19:01:05,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-20 19:01:05,917 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:05,917 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:05,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-20 19:01:06,131 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 [2022-03-20 19:01:06,132 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:06,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:06,132 INFO L85 PathProgramCache]: Analyzing trace with hash -2059609310, now seen corresponding path program 39 times [2022-03-20 19:01:06,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:06,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [245847801] [2022-03-20 19:01:06,250 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:01:06,250 INFO L85 PathProgramCache]: Analyzing trace with hash -27046576, now seen corresponding path program 1 times [2022-03-20 19:01:06,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:06,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129535061] [2022-03-20 19:01:06,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:06,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:06,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:01:06,265 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:01:06,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:01:06,284 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:01:06,284 INFO L85 PathProgramCache]: Analyzing trace with hash -2059609310, now seen corresponding path program 40 times [2022-03-20 19:01:06,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:06,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430002596] [2022-03-20 19:01:06,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:06,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:06,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:06,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:06,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:06,447 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 21 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:06,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:06,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430002596] [2022-03-20 19:01:06,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430002596] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:01:06,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202202926] [2022-03-20 19:01:06,448 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:01:06,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:01:06,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:01:06,449 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:01:06,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-20 19:01:06,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:01:06,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:01:06,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-20 19:01:06,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:01:06,579 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 21 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:06,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:01:07,055 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 21 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:07,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202202926] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:01:07,055 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:01:07,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 46 [2022-03-20 19:01:07,055 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:07,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [245847801] [2022-03-20 19:01:07,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [245847801] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:07,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:07,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-20 19:01:07,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186395990] [2022-03-20 19:01:07,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:07,056 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 19:01:07,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:07,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 19:01:07,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 19:01:07,057 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 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) [2022-03-20 19:01:07,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:07,308 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2022-03-20 19:01:07,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 19:01:07,309 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 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 [2022-03-20 19:01:07,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:07,309 INFO L225 Difference]: With dead ends: 64 [2022-03-20 19:01:07,309 INFO L226 Difference]: Without dead ends: 57 [2022-03-20 19:01:07,310 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1938, Invalid=2484, Unknown=0, NotChecked=0, Total=4422 [2022-03-20 19:01:07,311 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 29 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:07,311 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 39 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:01:07,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-03-20 19:01:07,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-03-20 19:01:07,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 52 states have internal predecessors, (55), 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) [2022-03-20 19:01:07,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2022-03-20 19:01:07,313 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 53 [2022-03-20 19:01:07,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:07,314 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2022-03-20 19:01:07,314 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 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) [2022-03-20 19:01:07,314 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2022-03-20 19:01:07,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-20 19:01:07,314 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:07,314 INFO L499 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:07,330 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-03-20 19:01:07,520 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 [2022-03-20 19:01:07,521 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:07,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:07,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1687206337, now seen corresponding path program 41 times [2022-03-20 19:01:07,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:07,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [216897355] [2022-03-20 19:01:07,647 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:01:07,647 INFO L85 PathProgramCache]: Analyzing trace with hash 32058768, now seen corresponding path program 1 times [2022-03-20 19:01:07,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:07,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741933164] [2022-03-20 19:01:07,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:07,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:07,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:01:07,650 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:01:07,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:01:07,653 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:01:07,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1687206337, now seen corresponding path program 42 times [2022-03-20 19:01:07,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:07,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019558521] [2022-03-20 19:01:07,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:07,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:07,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:07,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:07,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:07,878 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 22 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:07,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:07,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019558521] [2022-03-20 19:01:07,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019558521] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:01:07,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585056749] [2022-03-20 19:01:07,878 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 19:01:07,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:01:07,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:01:07,879 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:01:07,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-20 19:01:07,915 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 19:01:07,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:01:07,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 19:01:07,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:01:07,990 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 63 proven. 1 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-03-20 19:01:07,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:01:08,055 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 63 proven. 1 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-03-20 19:01:08,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585056749] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:01:08,056 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:01:08,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 4, 4] total 29 [2022-03-20 19:01:08,056 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:08,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [216897355] [2022-03-20 19:01:08,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [216897355] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:08,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:08,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-20 19:01:08,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446176809] [2022-03-20 19:01:08,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:08,056 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-20 19:01:08,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:08,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-20 19:01:08,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2022-03-20 19:01:08,057 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 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) [2022-03-20 19:01:08,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:08,341 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2022-03-20 19:01:08,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 19:01:08,341 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 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 [2022-03-20 19:01:08,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:08,342 INFO L225 Difference]: With dead ends: 66 [2022-03-20 19:01:08,342 INFO L226 Difference]: Without dead ends: 59 [2022-03-20 19:01:08,342 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1018, Invalid=1532, Unknown=0, NotChecked=0, Total=2550 [2022-03-20 19:01:08,343 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 30 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:08,343 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 49 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:01:08,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-03-20 19:01:08,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-03-20 19:01:08,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 54 states have internal predecessors, (57), 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) [2022-03-20 19:01:08,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2022-03-20 19:01:08,345 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 55 [2022-03-20 19:01:08,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:08,345 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2022-03-20 19:01:08,345 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 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) [2022-03-20 19:01:08,346 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2022-03-20 19:01:08,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-20 19:01:08,346 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:08,346 INFO L499 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:08,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-20 19:01:08,555 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 [2022-03-20 19:01:08,555 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:08,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:08,556 INFO L85 PathProgramCache]: Analyzing trace with hash -290234852, now seen corresponding path program 43 times [2022-03-20 19:01:08,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:08,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [265024789] [2022-03-20 19:01:08,752 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:01:08,752 INFO L85 PathProgramCache]: Analyzing trace with hash 91164112, now seen corresponding path program 1 times [2022-03-20 19:01:08,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:08,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746417979] [2022-03-20 19:01:08,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:08,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:08,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:01:08,755 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:01:08,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:01:08,757 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:01:08,757 INFO L85 PathProgramCache]: Analyzing trace with hash -290234852, now seen corresponding path program 44 times [2022-03-20 19:01:08,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:08,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510064844] [2022-03-20 19:01:08,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:08,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:08,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:08,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:08,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:08,972 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 23 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:08,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:08,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510064844] [2022-03-20 19:01:08,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510064844] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:01:08,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786798256] [2022-03-20 19:01:08,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:01:08,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:01:08,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:01:08,973 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:01:08,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-20 19:01:09,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:01:09,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:01:09,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-20 19:01:09,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:01:09,084 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 23 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:09,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:01:09,448 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 23 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:09,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786798256] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:01:09,448 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:01:09,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-03-20 19:01:09,449 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:09,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [265024789] [2022-03-20 19:01:09,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [265024789] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:09,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:09,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-20 19:01:09,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253708296] [2022-03-20 19:01:09,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:09,450 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 19:01:09,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:09,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 19:01:09,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-03-20 19:01:09,450 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 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) [2022-03-20 19:01:09,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:09,661 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2022-03-20 19:01:09,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-20 19:01:09,661 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 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 [2022-03-20 19:01:09,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:09,661 INFO L225 Difference]: With dead ends: 68 [2022-03-20 19:01:09,661 INFO L226 Difference]: Without dead ends: 61 [2022-03-20 19:01:09,663 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=2306, Invalid=2950, Unknown=0, NotChecked=0, Total=5256 [2022-03-20 19:01:09,666 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 31 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:09,666 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 39 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:01:09,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-03-20 19:01:09,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-03-20 19:01:09,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 56 states have internal predecessors, (59), 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) [2022-03-20 19:01:09,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2022-03-20 19:01:09,670 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 57 [2022-03-20 19:01:09,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:09,671 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2022-03-20 19:01:09,671 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 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) [2022-03-20 19:01:09,676 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2022-03-20 19:01:09,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-20 19:01:09,676 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:09,676 INFO L499 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:09,693 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-03-20 19:01:09,893 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 [2022-03-20 19:01:09,893 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:09,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:09,893 INFO L85 PathProgramCache]: Analyzing trace with hash -2125401415, now seen corresponding path program 45 times [2022-03-20 19:01:09,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:09,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1126712366] [2022-03-20 19:01:10,040 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:01:10,040 INFO L85 PathProgramCache]: Analyzing trace with hash 150269456, now seen corresponding path program 1 times [2022-03-20 19:01:10,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:10,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139877058] [2022-03-20 19:01:10,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:10,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:10,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:01:10,043 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:01:10,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:01:10,045 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:01:10,045 INFO L85 PathProgramCache]: Analyzing trace with hash -2125401415, now seen corresponding path program 46 times [2022-03-20 19:01:10,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:10,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443752929] [2022-03-20 19:01:10,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:10,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:10,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:10,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:10,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:10,222 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 24 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:10,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:10,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443752929] [2022-03-20 19:01:10,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443752929] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:01:10,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002422573] [2022-03-20 19:01:10,222 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:01:10,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:01:10,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:01:10,224 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:01:10,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-20 19:01:10,263 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:01:10,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:01:10,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 19:01:10,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:01:10,317 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 24 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:10,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:01:10,808 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 24 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:10,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002422573] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:01:10,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:01:10,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 52 [2022-03-20 19:01:10,808 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:10,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1126712366] [2022-03-20 19:01:10,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1126712366] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:10,808 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:10,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-20 19:01:10,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946470298] [2022-03-20 19:01:10,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:10,809 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-20 19:01:10,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:10,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-20 19:01:10,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2022-03-20 19:01:10,810 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 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) [2022-03-20 19:01:11,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:11,133 INFO L93 Difference]: Finished difference Result 70 states and 74 transitions. [2022-03-20 19:01:11,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-20 19:01:11,133 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 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 [2022-03-20 19:01:11,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:11,133 INFO L225 Difference]: With dead ends: 70 [2022-03-20 19:01:11,134 INFO L226 Difference]: Without dead ends: 63 [2022-03-20 19:01:11,135 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2502, Invalid=3198, Unknown=0, NotChecked=0, Total=5700 [2022-03-20 19:01:11,135 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 32 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:11,135 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 19 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:01:11,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-20 19:01:11,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-03-20 19:01:11,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 58 states have internal predecessors, (61), 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) [2022-03-20 19:01:11,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2022-03-20 19:01:11,138 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 59 [2022-03-20 19:01:11,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:11,138 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2022-03-20 19:01:11,138 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 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) [2022-03-20 19:01:11,138 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2022-03-20 19:01:11,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-20 19:01:11,138 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:11,138 INFO L499 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:11,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-20 19:01:11,359 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 [2022-03-20 19:01:11,359 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:11,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:11,360 INFO L85 PathProgramCache]: Analyzing trace with hash -488909802, now seen corresponding path program 47 times [2022-03-20 19:01:11,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:11,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [29467227] [2022-03-20 19:01:11,543 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:01:11,544 INFO L85 PathProgramCache]: Analyzing trace with hash 209374800, now seen corresponding path program 1 times [2022-03-20 19:01:11,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:11,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141300698] [2022-03-20 19:01:11,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:11,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:11,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:01:11,546 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:01:11,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:01:11,551 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:01:11,551 INFO L85 PathProgramCache]: Analyzing trace with hash -488909802, now seen corresponding path program 48 times [2022-03-20 19:01:11,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:11,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856145018] [2022-03-20 19:01:11,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:11,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:11,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:11,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:11,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:11,832 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 25 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:11,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:11,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856145018] [2022-03-20 19:01:11,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856145018] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:01:11,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659106834] [2022-03-20 19:01:11,832 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 19:01:11,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:01:11,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:01:11,848 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:01:11,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-20 19:01:11,872 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 19:01:11,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:01:11,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 19:01:11,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:01:11,952 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 72 proven. 1 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2022-03-20 19:01:11,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:01:12,055 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 72 proven. 1 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2022-03-20 19:01:12,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659106834] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:01:12,055 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:01:12,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 4, 4] total 32 [2022-03-20 19:01:12,055 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:12,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [29467227] [2022-03-20 19:01:12,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [29467227] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:12,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:12,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-03-20 19:01:12,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890167497] [2022-03-20 19:01:12,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:12,056 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-20 19:01:12,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:12,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-20 19:01:12,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-03-20 19:01:12,057 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 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) [2022-03-20 19:01:12,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:12,384 INFO L93 Difference]: Finished difference Result 72 states and 76 transitions. [2022-03-20 19:01:12,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-20 19:01:12,384 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 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 [2022-03-20 19:01:12,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:12,385 INFO L225 Difference]: With dead ends: 72 [2022-03-20 19:01:12,385 INFO L226 Difference]: Without dead ends: 65 [2022-03-20 19:01:12,385 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1267, Invalid=1925, Unknown=0, NotChecked=0, Total=3192 [2022-03-20 19:01:12,386 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:12,386 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 29 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:01:12,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-03-20 19:01:12,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-03-20 19:01:12,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.05) internal successors, (63), 60 states have internal predecessors, (63), 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) [2022-03-20 19:01:12,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2022-03-20 19:01:12,388 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 61 [2022-03-20 19:01:12,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:12,389 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2022-03-20 19:01:12,389 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 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) [2022-03-20 19:01:12,389 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2022-03-20 19:01:12,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-20 19:01:12,389 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:12,389 INFO L499 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:12,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-20 19:01:12,596 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 [2022-03-20 19:01:12,596 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:12,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:12,596 INFO L85 PathProgramCache]: Analyzing trace with hash 221499955, now seen corresponding path program 49 times [2022-03-20 19:01:12,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:12,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1503890959] [2022-03-20 19:01:12,733 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:01:12,733 INFO L85 PathProgramCache]: Analyzing trace with hash 268480144, now seen corresponding path program 1 times [2022-03-20 19:01:12,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:12,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235418864] [2022-03-20 19:01:12,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:12,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:12,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:01:12,760 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:01:12,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:01:12,764 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:01:12,764 INFO L85 PathProgramCache]: Analyzing trace with hash 221499955, now seen corresponding path program 50 times [2022-03-20 19:01:12,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:12,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662876045] [2022-03-20 19:01:12,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:12,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:12,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:13,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:13,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:13,038 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 26 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:13,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:13,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662876045] [2022-03-20 19:01:13,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662876045] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:01:13,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513891694] [2022-03-20 19:01:13,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:01:13,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:01:13,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:01:13,041 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) [2022-03-20 19:01:13,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-20 19:01:13,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:01:13,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:01:13,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 19:01:13,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:01:13,174 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 26 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:13,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:01:13,737 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 26 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:13,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513891694] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:01:13,737 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:01:13,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 56 [2022-03-20 19:01:13,737 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:13,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1503890959] [2022-03-20 19:01:13,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1503890959] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:13,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:13,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-20 19:01:13,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091261189] [2022-03-20 19:01:13,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:13,738 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-20 19:01:13,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:13,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-20 19:01:13,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2022-03-20 19:01:13,739 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 28 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) [2022-03-20 19:01:14,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:14,018 INFO L93 Difference]: Finished difference Result 74 states and 78 transitions. [2022-03-20 19:01:14,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-20 19:01:14,018 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 28 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 [2022-03-20 19:01:14,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:14,019 INFO L225 Difference]: With dead ends: 74 [2022-03-20 19:01:14,019 INFO L226 Difference]: Without dead ends: 67 [2022-03-20 19:01:14,020 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2918, Invalid=3724, Unknown=0, NotChecked=0, Total=6642 [2022-03-20 19:01:14,020 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 34 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:14,020 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 24 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:01:14,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-20 19:01:14,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-03-20 19:01:14,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 62 states have internal predecessors, (65), 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) [2022-03-20 19:01:14,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2022-03-20 19:01:14,027 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 63 [2022-03-20 19:01:14,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:14,027 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2022-03-20 19:01:14,028 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 28 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) [2022-03-20 19:01:14,028 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2022-03-20 19:01:14,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-20 19:01:14,028 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:14,028 INFO L499 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:14,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-20 19:01:14,245 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 [2022-03-20 19:01:14,245 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:14,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:14,245 INFO L85 PathProgramCache]: Analyzing trace with hash 25476368, now seen corresponding path program 51 times [2022-03-20 19:01:14,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:14,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [818846777] [2022-03-20 19:01:14,408 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:01:14,408 INFO L85 PathProgramCache]: Analyzing trace with hash 327585488, now seen corresponding path program 1 times [2022-03-20 19:01:14,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:14,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072543982] [2022-03-20 19:01:14,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:14,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:14,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:01:14,415 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:01:14,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:01:14,433 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:01:14,433 INFO L85 PathProgramCache]: Analyzing trace with hash 25476368, now seen corresponding path program 52 times [2022-03-20 19:01:14,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:14,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303913909] [2022-03-20 19:01:14,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:14,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:14,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:14,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:14,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:14,614 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 27 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:14,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:14,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303913909] [2022-03-20 19:01:14,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303913909] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:01:14,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405824186] [2022-03-20 19:01:14,614 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:01:14,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:01:14,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:01:14,615 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) [2022-03-20 19:01:14,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-20 19:01:14,654 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:01:14,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:01:14,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-20 19:01:14,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:01:14,727 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 27 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:14,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:01:15,158 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 27 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:15,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405824186] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:01:15,158 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:01:15,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 58 [2022-03-20 19:01:15,158 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:15,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [818846777] [2022-03-20 19:01:15,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [818846777] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:15,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:15,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-03-20 19:01:15,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041525285] [2022-03-20 19:01:15,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:15,159 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-20 19:01:15,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:15,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-20 19:01:15,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2022-03-20 19:01:15,171 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 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) [2022-03-20 19:01:15,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:15,429 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2022-03-20 19:01:15,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-20 19:01:15,429 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 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 [2022-03-20 19:01:15,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:15,432 INFO L225 Difference]: With dead ends: 76 [2022-03-20 19:01:15,432 INFO L226 Difference]: Without dead ends: 69 [2022-03-20 19:01:15,433 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=3138, Invalid=4002, Unknown=0, NotChecked=0, Total=7140 [2022-03-20 19:01:15,439 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 35 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:15,440 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 34 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:01:15,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-03-20 19:01:15,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-03-20 19:01:15,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.046875) internal successors, (67), 64 states have internal predecessors, (67), 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) [2022-03-20 19:01:15,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2022-03-20 19:01:15,445 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 65 [2022-03-20 19:01:15,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:15,450 INFO L478 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2022-03-20 19:01:15,450 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 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) [2022-03-20 19:01:15,450 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2022-03-20 19:01:15,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-20 19:01:15,451 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:15,451 INFO L499 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:15,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-20 19:01:15,663 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 [2022-03-20 19:01:15,663 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:15,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:15,664 INFO L85 PathProgramCache]: Analyzing trace with hash 625370285, now seen corresponding path program 53 times [2022-03-20 19:01:15,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:15,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [293684224] [2022-03-20 19:01:15,778 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:01:15,779 INFO L85 PathProgramCache]: Analyzing trace with hash 386690832, now seen corresponding path program 1 times [2022-03-20 19:01:15,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:15,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573238910] [2022-03-20 19:01:15,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:15,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:15,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:01:15,799 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:01:15,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:01:15,801 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:01:15,802 INFO L85 PathProgramCache]: Analyzing trace with hash 625370285, now seen corresponding path program 54 times [2022-03-20 19:01:15,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:15,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979807549] [2022-03-20 19:01:15,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:15,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:15,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:16,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:16,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:16,008 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 28 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:16,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:16,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979807549] [2022-03-20 19:01:16,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979807549] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:01:16,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962079325] [2022-03-20 19:01:16,009 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 19:01:16,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:01:16,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:01:16,010 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) [2022-03-20 19:01:16,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-20 19:01:16,069 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 19:01:16,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:01:16,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 19:01:16,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:01:16,128 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 81 proven. 1 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2022-03-20 19:01:16,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:01:16,183 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 81 proven. 1 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2022-03-20 19:01:16,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962079325] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:01:16,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:01:16,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 4, 4] total 35 [2022-03-20 19:01:16,184 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:16,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [293684224] [2022-03-20 19:01:16,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [293684224] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:16,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:16,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-03-20 19:01:16,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700664564] [2022-03-20 19:01:16,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:16,184 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-20 19:01:16,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:16,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-20 19:01:16,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 19:01:16,185 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 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) [2022-03-20 19:01:16,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:16,434 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2022-03-20 19:01:16,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-20 19:01:16,435 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 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 [2022-03-20 19:01:16,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:16,435 INFO L225 Difference]: With dead ends: 78 [2022-03-20 19:01:16,435 INFO L226 Difference]: Without dead ends: 71 [2022-03-20 19:01:16,436 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1543, Invalid=2363, Unknown=0, NotChecked=0, Total=3906 [2022-03-20 19:01:16,436 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 36 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:16,436 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 39 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:01:16,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-03-20 19:01:16,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-03-20 19:01:16,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 66 states have internal predecessors, (69), 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) [2022-03-20 19:01:16,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2022-03-20 19:01:16,439 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 67 [2022-03-20 19:01:16,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:16,439 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2022-03-20 19:01:16,439 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 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) [2022-03-20 19:01:16,439 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2022-03-20 19:01:16,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-20 19:01:16,440 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:16,440 INFO L499 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:16,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-20 19:01:16,655 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 [2022-03-20 19:01:16,655 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:16,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:16,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1597806858, now seen corresponding path program 55 times [2022-03-20 19:01:16,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:16,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [495321788] [2022-03-20 19:01:16,783 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:01:16,784 INFO L85 PathProgramCache]: Analyzing trace with hash 445796176, now seen corresponding path program 1 times [2022-03-20 19:01:16,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:16,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917169927] [2022-03-20 19:01:16,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:16,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:16,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:01:16,790 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:01:16,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:01:16,794 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:01:16,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1597806858, now seen corresponding path program 56 times [2022-03-20 19:01:16,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:16,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874834838] [2022-03-20 19:01:16,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:16,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:16,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:17,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:17,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:17,145 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 29 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:17,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:17,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874834838] [2022-03-20 19:01:17,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874834838] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:01:17,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313089695] [2022-03-20 19:01:17,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:01:17,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:01:17,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:01:17,147 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) [2022-03-20 19:01:17,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-20 19:01:17,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:01:17,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:01:17,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-20 19:01:17,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:01:17,289 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 29 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:17,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:01:18,136 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 29 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:18,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313089695] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:01:18,137 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:01:18,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 62 [2022-03-20 19:01:18,137 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:18,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [495321788] [2022-03-20 19:01:18,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [495321788] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:18,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:18,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-03-20 19:01:18,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926744550] [2022-03-20 19:01:18,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:18,137 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-20 19:01:18,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:18,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-20 19:01:18,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2022-03-20 19:01:18,138 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 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) [2022-03-20 19:01:18,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:18,555 INFO L93 Difference]: Finished difference Result 80 states and 84 transitions. [2022-03-20 19:01:18,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-20 19:01:18,555 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 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 [2022-03-20 19:01:18,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:18,556 INFO L225 Difference]: With dead ends: 80 [2022-03-20 19:01:18,556 INFO L226 Difference]: Without dead ends: 73 [2022-03-20 19:01:18,557 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3602, Invalid=4588, Unknown=0, NotChecked=0, Total=8190 [2022-03-20 19:01:18,557 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 37 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:18,557 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 34 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:01:18,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-03-20 19:01:18,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-03-20 19:01:18,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 68 states have internal predecessors, (71), 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) [2022-03-20 19:01:18,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2022-03-20 19:01:18,570 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 69 [2022-03-20 19:01:18,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:18,571 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2022-03-20 19:01:18,571 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 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) [2022-03-20 19:01:18,571 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2022-03-20 19:01:18,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-20 19:01:18,571 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:18,571 INFO L499 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:18,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-20 19:01:18,779 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 [2022-03-20 19:01:18,779 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:18,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:18,780 INFO L85 PathProgramCache]: Analyzing trace with hash -193517017, now seen corresponding path program 57 times [2022-03-20 19:01:18,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:18,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [743150842] [2022-03-20 19:01:18,939 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:01:18,940 INFO L85 PathProgramCache]: Analyzing trace with hash 504901520, now seen corresponding path program 1 times [2022-03-20 19:01:18,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:18,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439300375] [2022-03-20 19:01:18,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:18,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:18,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:01:18,957 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:01:18,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:01:18,975 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:01:18,975 INFO L85 PathProgramCache]: Analyzing trace with hash -193517017, now seen corresponding path program 58 times [2022-03-20 19:01:18,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:18,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785616485] [2022-03-20 19:01:18,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:18,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:18,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:19,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:19,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:19,368 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 30 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:19,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:19,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785616485] [2022-03-20 19:01:19,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785616485] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:01:19,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136959698] [2022-03-20 19:01:19,369 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:01:19,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:01:19,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:01:19,370 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) [2022-03-20 19:01:19,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-20 19:01:19,408 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:01:19,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:01:19,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-20 19:01:19,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:01:19,487 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 30 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:19,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:01:20,417 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 30 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:20,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136959698] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:01:20,417 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:01:20,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 64 [2022-03-20 19:01:20,417 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:20,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [743150842] [2022-03-20 19:01:20,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [743150842] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:20,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:20,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-03-20 19:01:20,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954250200] [2022-03-20 19:01:20,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:20,418 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-20 19:01:20,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:20,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-20 19:01:20,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2022-03-20 19:01:20,419 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 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) [2022-03-20 19:01:20,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:20,824 INFO L93 Difference]: Finished difference Result 82 states and 86 transitions. [2022-03-20 19:01:20,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-20 19:01:20,824 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 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 [2022-03-20 19:01:20,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:20,824 INFO L225 Difference]: With dead ends: 82 [2022-03-20 19:01:20,824 INFO L226 Difference]: Without dead ends: 75 [2022-03-20 19:01:20,825 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3846, Invalid=4896, Unknown=0, NotChecked=0, Total=8742 [2022-03-20 19:01:20,826 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 38 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:20,826 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 39 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:01:20,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-03-20 19:01:20,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-03-20 19:01:20,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.042857142857143) internal successors, (73), 70 states have internal predecessors, (73), 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) [2022-03-20 19:01:20,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2022-03-20 19:01:20,828 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 71 [2022-03-20 19:01:20,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:20,829 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2022-03-20 19:01:20,829 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 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) [2022-03-20 19:01:20,829 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2022-03-20 19:01:20,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-20 19:01:20,829 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:20,829 INFO L499 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:20,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-20 19:01:21,039 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 [2022-03-20 19:01:21,039 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:21,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:21,040 INFO L85 PathProgramCache]: Analyzing trace with hash 626124804, now seen corresponding path program 59 times [2022-03-20 19:01:21,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:21,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1888638311] [2022-03-20 19:01:21,176 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:01:21,177 INFO L85 PathProgramCache]: Analyzing trace with hash 564006864, now seen corresponding path program 1 times [2022-03-20 19:01:21,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:21,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137663245] [2022-03-20 19:01:21,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:21,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:21,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:01:21,180 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:01:21,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:01:21,182 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:01:21,182 INFO L85 PathProgramCache]: Analyzing trace with hash 626124804, now seen corresponding path program 60 times [2022-03-20 19:01:21,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:21,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468911934] [2022-03-20 19:01:21,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:21,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:21,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:21,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:21,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:21,528 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 31 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:21,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:21,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468911934] [2022-03-20 19:01:21,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468911934] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:01:21,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742978723] [2022-03-20 19:01:21,529 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 19:01:21,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:01:21,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:01:21,530 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) [2022-03-20 19:01:21,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-20 19:01:21,555 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 19:01:21,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:01:21,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 19:01:21,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:01:21,683 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 90 proven. 1 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2022-03-20 19:01:21,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:01:21,789 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 90 proven. 1 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2022-03-20 19:01:21,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742978723] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:01:21,789 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:01:21,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 4, 4] total 38 [2022-03-20 19:01:21,790 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:21,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1888638311] [2022-03-20 19:01:21,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1888638311] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:21,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:21,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-03-20 19:01:21,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599912173] [2022-03-20 19:01:21,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:21,790 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-20 19:01:21,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:21,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-20 19:01:21,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 19:01:21,791 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 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) [2022-03-20 19:01:22,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:22,278 INFO L93 Difference]: Finished difference Result 84 states and 88 transitions. [2022-03-20 19:01:22,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-20 19:01:22,279 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 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 [2022-03-20 19:01:22,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:22,279 INFO L225 Difference]: With dead ends: 84 [2022-03-20 19:01:22,279 INFO L226 Difference]: Without dead ends: 77 [2022-03-20 19:01:22,280 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1846, Invalid=2846, Unknown=0, NotChecked=0, Total=4692 [2022-03-20 19:01:22,280 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 39 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:22,280 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 39 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:01:22,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-20 19:01:22,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-03-20 19:01:22,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 72 states have internal predecessors, (75), 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) [2022-03-20 19:01:22,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2022-03-20 19:01:22,283 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 73 [2022-03-20 19:01:22,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:22,283 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2022-03-20 19:01:22,283 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 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) [2022-03-20 19:01:22,283 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2022-03-20 19:01:22,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-20 19:01:22,284 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:22,284 INFO L499 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:22,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-20 19:01:22,501 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 [2022-03-20 19:01:22,501 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:22,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:22,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1972067679, now seen corresponding path program 61 times [2022-03-20 19:01:22,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:22,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1857967159] [2022-03-20 19:01:22,639 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:01:22,639 INFO L85 PathProgramCache]: Analyzing trace with hash 623112208, now seen corresponding path program 1 times [2022-03-20 19:01:22,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:22,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202587963] [2022-03-20 19:01:22,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:22,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:22,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:01:22,642 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:01:22,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:01:22,645 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:01:22,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1972067679, now seen corresponding path program 62 times [2022-03-20 19:01:22,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:22,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999061039] [2022-03-20 19:01:22,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:22,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:22,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:23,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:23,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:23,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 32 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:23,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:23,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999061039] [2022-03-20 19:01:23,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999061039] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:01:23,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597809036] [2022-03-20 19:01:23,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:01:23,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:01:23,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:01:23,032 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) [2022-03-20 19:01:23,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-20 19:01:23,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:01:23,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:01:23,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-20 19:01:23,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:01:23,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 32 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:23,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:01:24,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 32 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:24,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597809036] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:01:24,077 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:01:24,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 68 [2022-03-20 19:01:24,077 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:24,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1857967159] [2022-03-20 19:01:24,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1857967159] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:24,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:24,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-03-20 19:01:24,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816952102] [2022-03-20 19:01:24,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:24,078 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-20 19:01:24,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:24,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-20 19:01:24,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2022-03-20 19:01:24,079 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 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) [2022-03-20 19:01:24,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:24,523 INFO L93 Difference]: Finished difference Result 86 states and 90 transitions. [2022-03-20 19:01:24,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-20 19:01:24,524 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 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 [2022-03-20 19:01:24,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:24,524 INFO L225 Difference]: With dead ends: 86 [2022-03-20 19:01:24,524 INFO L226 Difference]: Without dead ends: 79 [2022-03-20 19:01:24,525 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=4358, Invalid=5542, Unknown=0, NotChecked=0, Total=9900 [2022-03-20 19:01:24,525 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 40 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:24,525 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 54 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:01:24,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-20 19:01:24,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-03-20 19:01:24,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 74 states have internal predecessors, (77), 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) [2022-03-20 19:01:24,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2022-03-20 19:01:24,528 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 75 [2022-03-20 19:01:24,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:24,529 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2022-03-20 19:01:24,529 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 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) [2022-03-20 19:01:24,529 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2022-03-20 19:01:24,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-20 19:01:24,529 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:24,529 INFO L499 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:24,547 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-03-20 19:01:24,730 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 [2022-03-20 19:01:24,730 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:24,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:24,730 INFO L85 PathProgramCache]: Analyzing trace with hash 835922430, now seen corresponding path program 63 times [2022-03-20 19:01:24,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:24,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [256696123] [2022-03-20 19:01:24,906 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:01:24,907 INFO L85 PathProgramCache]: Analyzing trace with hash 682217552, now seen corresponding path program 1 times [2022-03-20 19:01:24,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:24,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788181438] [2022-03-20 19:01:24,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:24,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:24,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:01:24,909 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:01:24,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:01:24,911 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:01:24,911 INFO L85 PathProgramCache]: Analyzing trace with hash 835922430, now seen corresponding path program 64 times [2022-03-20 19:01:24,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:24,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767556169] [2022-03-20 19:01:24,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:24,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:24,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:25,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:25,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:25,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 33 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:25,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:25,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767556169] [2022-03-20 19:01:25,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767556169] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:01:25,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981802862] [2022-03-20 19:01:25,302 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:01:25,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:01:25,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:01:25,303 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) [2022-03-20 19:01:25,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-20 19:01:25,342 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:01:25,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:01:25,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-20 19:01:25,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:01:25,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 33 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:25,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:01:26,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 33 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:26,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981802862] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:01:26,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:01:26,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 70 [2022-03-20 19:01:26,159 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:26,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [256696123] [2022-03-20 19:01:26,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [256696123] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:26,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:26,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-03-20 19:01:26,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511177496] [2022-03-20 19:01:26,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:26,160 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-20 19:01:26,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:26,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-20 19:01:26,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-03-20 19:01:26,161 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 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) [2022-03-20 19:01:26,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:26,527 INFO L93 Difference]: Finished difference Result 88 states and 92 transitions. [2022-03-20 19:01:26,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-20 19:01:26,527 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 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 [2022-03-20 19:01:26,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:26,532 INFO L225 Difference]: With dead ends: 88 [2022-03-20 19:01:26,532 INFO L226 Difference]: Without dead ends: 81 [2022-03-20 19:01:26,535 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=4626, Invalid=5880, Unknown=0, NotChecked=0, Total=10506 [2022-03-20 19:01:26,535 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 41 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:26,535 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 34 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:01:26,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-03-20 19:01:26,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-03-20 19:01:26,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 76 states have internal predecessors, (79), 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) [2022-03-20 19:01:26,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2022-03-20 19:01:26,549 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 77 [2022-03-20 19:01:26,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:26,549 INFO L478 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2022-03-20 19:01:26,549 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 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) [2022-03-20 19:01:26,549 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2022-03-20 19:01:26,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-20 19:01:26,550 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:26,550 INFO L499 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:26,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-20 19:01:26,766 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 [2022-03-20 19:01:26,767 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:26,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:26,767 INFO L85 PathProgramCache]: Analyzing trace with hash 2074955291, now seen corresponding path program 65 times [2022-03-20 19:01:26,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:26,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [632061272] [2022-03-20 19:01:26,913 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:01:26,914 INFO L85 PathProgramCache]: Analyzing trace with hash 741322896, now seen corresponding path program 1 times [2022-03-20 19:01:26,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:26,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589326995] [2022-03-20 19:01:26,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:26,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:26,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:01:26,927 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:01:26,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:01:26,941 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:01:26,941 INFO L85 PathProgramCache]: Analyzing trace with hash 2074955291, now seen corresponding path program 66 times [2022-03-20 19:01:26,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:26,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172962230] [2022-03-20 19:01:26,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:26,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:26,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:27,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:27,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:27,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 34 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:27,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:27,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172962230] [2022-03-20 19:01:27,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172962230] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:01:27,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216447514] [2022-03-20 19:01:27,203 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 19:01:27,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:01:27,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:01:27,206 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) [2022-03-20 19:01:27,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-20 19:01:27,230 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 19:01:27,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:01:27,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 19:01:27,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:01:27,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 99 proven. 1 refuted. 0 times theorem prover too weak. 1056 trivial. 0 not checked. [2022-03-20 19:01:27,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:01:27,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 99 proven. 1 refuted. 0 times theorem prover too weak. 1056 trivial. 0 not checked. [2022-03-20 19:01:27,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216447514] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:01:27,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:01:27,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 4, 4] total 41 [2022-03-20 19:01:27,471 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:27,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [632061272] [2022-03-20 19:01:27,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [632061272] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:27,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:27,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-03-20 19:01:27,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014852948] [2022-03-20 19:01:27,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:27,471 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-20 19:01:27,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:27,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-20 19:01:27,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2022-03-20 19:01:27,472 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 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) [2022-03-20 19:01:28,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:28,042 INFO L93 Difference]: Finished difference Result 90 states and 94 transitions. [2022-03-20 19:01:28,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-20 19:01:28,042 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 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 [2022-03-20 19:01:28,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:28,043 INFO L225 Difference]: With dead ends: 90 [2022-03-20 19:01:28,043 INFO L226 Difference]: Without dead ends: 83 [2022-03-20 19:01:28,044 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2176, Invalid=3374, Unknown=0, NotChecked=0, Total=5550 [2022-03-20 19:01:28,044 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 42 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:28,044 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 29 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:01:28,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-03-20 19:01:28,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-03-20 19:01:28,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.0384615384615385) internal successors, (81), 78 states have internal predecessors, (81), 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) [2022-03-20 19:01:28,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2022-03-20 19:01:28,047 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 79 [2022-03-20 19:01:28,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:28,047 INFO L478 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2022-03-20 19:01:28,047 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 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) [2022-03-20 19:01:28,047 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2022-03-20 19:01:28,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-20 19:01:28,048 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:28,048 INFO L499 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:28,065 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-03-20 19:01:28,255 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 [2022-03-20 19:01:28,255 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:28,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:28,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1215373576, now seen corresponding path program 67 times [2022-03-20 19:01:28,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:28,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2031144787] [2022-03-20 19:01:28,454 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:01:28,454 INFO L85 PathProgramCache]: Analyzing trace with hash 800428240, now seen corresponding path program 1 times [2022-03-20 19:01:28,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:28,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420830681] [2022-03-20 19:01:28,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:28,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:28,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:01:28,466 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:01:28,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:01:28,471 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:01:28,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1215373576, now seen corresponding path program 68 times [2022-03-20 19:01:28,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:28,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790415886] [2022-03-20 19:01:28,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:28,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:28,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:28,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:28,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:28,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 35 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:28,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:28,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790415886] [2022-03-20 19:01:28,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790415886] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:01:28,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140085705] [2022-03-20 19:01:28,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:01:28,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:01:28,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:01:28,884 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) [2022-03-20 19:01:28,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-20 19:01:28,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:01:28,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:01:28,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-20 19:01:28,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:01:28,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 35 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:28,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:01:29,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 35 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:29,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140085705] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:01:29,783 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:01:29,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 74 [2022-03-20 19:01:29,783 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:29,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2031144787] [2022-03-20 19:01:29,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2031144787] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:29,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:29,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-03-20 19:01:29,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346331401] [2022-03-20 19:01:29,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:29,784 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-20 19:01:29,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:29,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-20 19:01:29,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2022-03-20 19:01:29,784 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 37 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) [2022-03-20 19:01:30,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:30,291 INFO L93 Difference]: Finished difference Result 92 states and 96 transitions. [2022-03-20 19:01:30,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-20 19:01:30,291 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 37 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 [2022-03-20 19:01:30,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:30,292 INFO L225 Difference]: With dead ends: 92 [2022-03-20 19:01:30,292 INFO L226 Difference]: Without dead ends: 85 [2022-03-20 19:01:30,293 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=5186, Invalid=6586, Unknown=0, NotChecked=0, Total=11772 [2022-03-20 19:01:30,294 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 43 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:30,294 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 19 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:01:30,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-03-20 19:01:30,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-03-20 19:01:30,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.0375) internal successors, (83), 80 states have internal predecessors, (83), 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) [2022-03-20 19:01:30,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2022-03-20 19:01:30,311 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 81 [2022-03-20 19:01:30,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:30,311 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2022-03-20 19:01:30,311 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 37 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) [2022-03-20 19:01:30,311 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2022-03-20 19:01:30,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-03-20 19:01:30,312 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:30,312 INFO L499 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:30,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-20 19:01:30,519 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 [2022-03-20 19:01:30,519 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:30,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:30,520 INFO L85 PathProgramCache]: Analyzing trace with hash -2125484907, now seen corresponding path program 69 times [2022-03-20 19:01:30,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:30,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1093740365] [2022-03-20 19:01:30,683 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:01:30,683 INFO L85 PathProgramCache]: Analyzing trace with hash 859533584, now seen corresponding path program 1 times [2022-03-20 19:01:30,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:30,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731668927] [2022-03-20 19:01:30,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:30,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:30,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:01:30,686 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:01:30,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:01:30,688 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:01:30,688 INFO L85 PathProgramCache]: Analyzing trace with hash -2125484907, now seen corresponding path program 70 times [2022-03-20 19:01:30,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:30,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124061774] [2022-03-20 19:01:30,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:30,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:30,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:31,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:31,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:31,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 36 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:31,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:31,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124061774] [2022-03-20 19:01:31,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124061774] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:01:31,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428613993] [2022-03-20 19:01:31,013 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:01:31,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:01:31,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:01:31,027 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) [2022-03-20 19:01:31,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-20 19:01:31,070 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:01:31,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:01:31,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-20 19:01:31,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:01:31,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 36 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:31,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:01:31,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 36 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:31,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428613993] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:01:31,985 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:01:31,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 76 [2022-03-20 19:01:31,985 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:31,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1093740365] [2022-03-20 19:01:31,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1093740365] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:31,988 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:31,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-03-20 19:01:31,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261134596] [2022-03-20 19:01:31,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:31,988 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-20 19:01:31,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:31,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-20 19:01:31,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2022-03-20 19:01:31,989 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 38 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) [2022-03-20 19:01:32,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:32,401 INFO L93 Difference]: Finished difference Result 94 states and 98 transitions. [2022-03-20 19:01:32,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-20 19:01:32,402 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 38 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 [2022-03-20 19:01:32,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:32,402 INFO L225 Difference]: With dead ends: 94 [2022-03-20 19:01:32,402 INFO L226 Difference]: Without dead ends: 87 [2022-03-20 19:01:32,403 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=5478, Invalid=6954, Unknown=0, NotChecked=0, Total=12432 [2022-03-20 19:01:32,403 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 44 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:32,403 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 29 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:01:32,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-03-20 19:01:32,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2022-03-20 19:01:32,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.0365853658536586) internal successors, (85), 82 states have internal predecessors, (85), 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) [2022-03-20 19:01:32,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2022-03-20 19:01:32,406 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 83 [2022-03-20 19:01:32,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:32,407 INFO L478 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2022-03-20 19:01:32,407 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 38 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) [2022-03-20 19:01:32,407 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2022-03-20 19:01:32,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-20 19:01:32,407 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:32,407 INFO L499 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:32,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-20 19:01:32,623 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 [2022-03-20 19:01:32,624 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:32,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:32,624 INFO L85 PathProgramCache]: Analyzing trace with hash -569145614, now seen corresponding path program 71 times [2022-03-20 19:01:32,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:32,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [894054256] [2022-03-20 19:01:32,778 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:01:32,778 INFO L85 PathProgramCache]: Analyzing trace with hash 918638928, now seen corresponding path program 1 times [2022-03-20 19:01:32,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:32,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223837503] [2022-03-20 19:01:32,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:32,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:32,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:01:32,780 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:01:32,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:01:32,782 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:01:32,782 INFO L85 PathProgramCache]: Analyzing trace with hash -569145614, now seen corresponding path program 72 times [2022-03-20 19:01:32,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:32,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15401661] [2022-03-20 19:01:32,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:32,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:32,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:33,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:33,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:33,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 37 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:33,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:33,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15401661] [2022-03-20 19:01:33,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15401661] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:01:33,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719952750] [2022-03-20 19:01:33,089 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 19:01:33,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:01:33,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:01:33,090 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) [2022-03-20 19:01:33,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-20 19:01:33,116 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 19:01:33,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:01:33,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 19:01:33,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:01:33,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 108 proven. 1 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked. [2022-03-20 19:01:33,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:01:33,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 108 proven. 1 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked. [2022-03-20 19:01:33,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719952750] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:01:33,255 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:01:33,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 4, 4] total 44 [2022-03-20 19:01:33,256 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:33,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [894054256] [2022-03-20 19:01:33,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [894054256] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:33,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:33,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-03-20 19:01:33,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819876216] [2022-03-20 19:01:33,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:33,256 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-20 19:01:33,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:33,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-20 19:01:33,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2022-03-20 19:01:33,257 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand has 40 states, 40 states have (on average 2.025) internal successors, (81), 39 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) [2022-03-20 19:01:33,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:33,685 INFO L93 Difference]: Finished difference Result 96 states and 100 transitions. [2022-03-20 19:01:33,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-20 19:01:33,685 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.025) internal successors, (81), 39 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 [2022-03-20 19:01:33,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:33,686 INFO L225 Difference]: With dead ends: 96 [2022-03-20 19:01:33,686 INFO L226 Difference]: Without dead ends: 89 [2022-03-20 19:01:33,690 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=2533, Invalid=3947, Unknown=0, NotChecked=0, Total=6480 [2022-03-20 19:01:33,690 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 45 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:33,690 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 44 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:01:33,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-03-20 19:01:33,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-03-20 19:01:33,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.0357142857142858) internal successors, (87), 84 states have internal predecessors, (87), 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) [2022-03-20 19:01:33,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2022-03-20 19:01:33,699 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 85 [2022-03-20 19:01:33,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:33,699 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2022-03-20 19:01:33,699 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.025) internal successors, (81), 39 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) [2022-03-20 19:01:33,699 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2022-03-20 19:01:33,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-03-20 19:01:33,699 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:33,699 INFO L499 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:33,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-20 19:01:33,916 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 [2022-03-20 19:01:33,916 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:33,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:33,916 INFO L85 PathProgramCache]: Analyzing trace with hash 424295951, now seen corresponding path program 73 times [2022-03-20 19:01:33,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:33,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [645704803] [2022-03-20 19:01:34,077 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:01:34,077 INFO L85 PathProgramCache]: Analyzing trace with hash 977744272, now seen corresponding path program 1 times [2022-03-20 19:01:34,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:34,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970979234] [2022-03-20 19:01:34,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:34,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:34,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:01:34,080 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:01:34,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:01:34,082 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:01:34,082 INFO L85 PathProgramCache]: Analyzing trace with hash 424295951, now seen corresponding path program 74 times [2022-03-20 19:01:34,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:34,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098735165] [2022-03-20 19:01:34,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:34,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:34,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:34,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:34,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:34,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 38 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:34,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:34,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098735165] [2022-03-20 19:01:34,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098735165] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:01:34,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536130535] [2022-03-20 19:01:34,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:01:34,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:01:34,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:01:34,417 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) [2022-03-20 19:01:34,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-20 19:01:34,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:01:34,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:01:34,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-20 19:01:34,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:01:34,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 38 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:34,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:01:35,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 38 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:35,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536130535] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:01:35,773 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:01:35,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 80 [2022-03-20 19:01:35,773 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:35,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [645704803] [2022-03-20 19:01:35,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [645704803] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:35,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:35,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-03-20 19:01:35,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418823624] [2022-03-20 19:01:35,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:35,773 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-20 19:01:35,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:35,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-20 19:01:35,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2022-03-20 19:01:35,775 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 40 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) [2022-03-20 19:01:36,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:36,443 INFO L93 Difference]: Finished difference Result 98 states and 102 transitions. [2022-03-20 19:01:36,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-20 19:01:36,443 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 40 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 [2022-03-20 19:01:36,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:36,444 INFO L225 Difference]: With dead ends: 98 [2022-03-20 19:01:36,444 INFO L226 Difference]: Without dead ends: 91 [2022-03-20 19:01:36,445 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=6086, Invalid=7720, Unknown=0, NotChecked=0, Total=13806 [2022-03-20 19:01:36,445 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 46 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:36,446 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 29 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:01:36,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-03-20 19:01:36,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-03-20 19:01:36,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.0348837209302326) internal successors, (89), 86 states have internal predecessors, (89), 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) [2022-03-20 19:01:36,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2022-03-20 19:01:36,449 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 87 [2022-03-20 19:01:36,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:36,449 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2022-03-20 19:01:36,449 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 40 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) [2022-03-20 19:01:36,449 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2022-03-20 19:01:36,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-03-20 19:01:36,449 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:36,449 INFO L499 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:36,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-20 19:01:36,659 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 [2022-03-20 19:01:36,659 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:36,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:36,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1638900204, now seen corresponding path program 75 times [2022-03-20 19:01:36,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:36,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1866974758] [2022-03-20 19:01:36,869 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:01:36,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1036849616, now seen corresponding path program 1 times [2022-03-20 19:01:36,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:36,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841385866] [2022-03-20 19:01:36,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:36,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:36,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:01:36,872 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:01:36,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:01:36,874 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:01:36,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1638900204, now seen corresponding path program 76 times [2022-03-20 19:01:36,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:36,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552382464] [2022-03-20 19:01:36,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:36,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:36,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:37,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:37,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:37,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 39 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:37,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:37,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552382464] [2022-03-20 19:01:37,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552382464] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:01:37,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358884860] [2022-03-20 19:01:37,416 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:01:37,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:01:37,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:01:37,417 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) [2022-03-20 19:01:37,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-20 19:01:37,462 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:01:37,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:01:37,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-20 19:01:37,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:01:37,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 39 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:37,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:01:38,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 39 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:38,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358884860] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:01:38,596 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:01:38,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 82 [2022-03-20 19:01:38,596 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:38,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1866974758] [2022-03-20 19:01:38,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1866974758] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:38,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:38,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-03-20 19:01:38,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494001893] [2022-03-20 19:01:38,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:38,597 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-20 19:01:38,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:38,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-20 19:01:38,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2022-03-20 19:01:38,598 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand has 42 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 41 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) [2022-03-20 19:01:39,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:39,210 INFO L93 Difference]: Finished difference Result 100 states and 104 transitions. [2022-03-20 19:01:39,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-20 19:01:39,210 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 41 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 [2022-03-20 19:01:39,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:39,211 INFO L225 Difference]: With dead ends: 100 [2022-03-20 19:01:39,211 INFO L226 Difference]: Without dead ends: 93 [2022-03-20 19:01:39,212 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 968 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=6402, Invalid=8118, Unknown=0, NotChecked=0, Total=14520 [2022-03-20 19:01:39,212 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 47 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:39,212 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 49 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:01:39,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-03-20 19:01:39,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-03-20 19:01:39,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 88 states have (on average 1.0340909090909092) internal successors, (91), 88 states have internal predecessors, (91), 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) [2022-03-20 19:01:39,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2022-03-20 19:01:39,216 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 89 [2022-03-20 19:01:39,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:39,216 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2022-03-20 19:01:39,216 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 41 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) [2022-03-20 19:01:39,216 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2022-03-20 19:01:39,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-20 19:01:39,216 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:39,217 INFO L499 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:39,232 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-03-20 19:01:39,427 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 [2022-03-20 19:01:39,427 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:39,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:39,427 INFO L85 PathProgramCache]: Analyzing trace with hash 642482825, now seen corresponding path program 77 times [2022-03-20 19:01:39,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:39,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [297015587] [2022-03-20 19:01:39,625 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:01:39,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1095954960, now seen corresponding path program 1 times [2022-03-20 19:01:39,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:39,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976212889] [2022-03-20 19:01:39,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:39,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:39,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:01:39,628 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:01:39,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:01:39,632 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:01:39,632 INFO L85 PathProgramCache]: Analyzing trace with hash 642482825, now seen corresponding path program 78 times [2022-03-20 19:01:39,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:39,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654975039] [2022-03-20 19:01:39,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:39,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:39,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:40,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:40,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:40,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 40 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:40,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:40,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654975039] [2022-03-20 19:01:40,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654975039] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:01:40,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620909953] [2022-03-20 19:01:40,225 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 19:01:40,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:01:40,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:01:40,227 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) [2022-03-20 19:01:40,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-20 19:01:40,253 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 19:01:40,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:01:40,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 19:01:40,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:01:40,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 117 proven. 1 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2022-03-20 19:01:40,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:01:40,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 117 proven. 1 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2022-03-20 19:01:40,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620909953] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:01:40,522 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:01:40,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 4, 4] total 47 [2022-03-20 19:01:40,522 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:40,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [297015587] [2022-03-20 19:01:40,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [297015587] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:40,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:40,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-03-20 19:01:40,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505408603] [2022-03-20 19:01:40,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:40,522 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-20 19:01:40,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:40,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-20 19:01:40,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2022-03-20 19:01:40,523 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 42 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) [2022-03-20 19:01:41,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:41,230 INFO L93 Difference]: Finished difference Result 102 states and 106 transitions. [2022-03-20 19:01:41,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-20 19:01:41,231 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 42 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 [2022-03-20 19:01:41,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:41,231 INFO L225 Difference]: With dead ends: 102 [2022-03-20 19:01:41,231 INFO L226 Difference]: Without dead ends: 95 [2022-03-20 19:01:41,232 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2917, Invalid=4565, Unknown=0, NotChecked=0, Total=7482 [2022-03-20 19:01:41,232 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 48 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:41,232 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 49 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:01:41,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-03-20 19:01:41,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2022-03-20 19:01:41,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.0333333333333334) internal successors, (93), 90 states have internal predecessors, (93), 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) [2022-03-20 19:01:41,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2022-03-20 19:01:41,240 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 91 [2022-03-20 19:01:41,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:41,240 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2022-03-20 19:01:41,240 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 42 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) [2022-03-20 19:01:41,240 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2022-03-20 19:01:41,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-20 19:01:41,240 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:41,241 INFO L499 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:41,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-20 19:01:41,441 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 [2022-03-20 19:01:41,441 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:41,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:41,441 INFO L85 PathProgramCache]: Analyzing trace with hash 863088614, now seen corresponding path program 79 times [2022-03-20 19:01:41,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:41,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1120264165] [2022-03-20 19:01:41,566 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:01:41,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1155060304, now seen corresponding path program 1 times [2022-03-20 19:01:41,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:41,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009471187] [2022-03-20 19:01:41,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:41,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:41,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:01:41,569 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:01:41,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:01:41,572 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:01:41,572 INFO L85 PathProgramCache]: Analyzing trace with hash 863088614, now seen corresponding path program 80 times [2022-03-20 19:01:41,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:41,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190587800] [2022-03-20 19:01:41,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:41,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:41,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:42,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:42,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:42,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 41 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:42,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:42,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190587800] [2022-03-20 19:01:42,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190587800] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:01:42,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646054178] [2022-03-20 19:01:42,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:01:42,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:01:42,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:01:42,061 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) [2022-03-20 19:01:42,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-20 19:01:42,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:01:42,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:01:42,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-20 19:01:42,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:01:42,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 41 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:42,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:01:43,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 41 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:43,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646054178] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:01:43,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:01:43,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 43] total 86 [2022-03-20 19:01:43,884 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:43,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1120264165] [2022-03-20 19:01:43,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1120264165] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:43,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:43,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-03-20 19:01:43,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657297562] [2022-03-20 19:01:43,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:43,885 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-20 19:01:43,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:43,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-20 19:01:43,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2022-03-20 19:01:43,886 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 43 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) [2022-03-20 19:01:44,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:44,629 INFO L93 Difference]: Finished difference Result 104 states and 108 transitions. [2022-03-20 19:01:44,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-20 19:01:44,629 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 43 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 [2022-03-20 19:01:44,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:44,630 INFO L225 Difference]: With dead ends: 104 [2022-03-20 19:01:44,630 INFO L226 Difference]: Without dead ends: 97 [2022-03-20 19:01:44,630 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1059 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=7058, Invalid=8944, Unknown=0, NotChecked=0, Total=16002 [2022-03-20 19:01:44,631 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 49 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:44,631 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 49 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:01:44,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-03-20 19:01:44,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2022-03-20 19:01:44,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.0326086956521738) internal successors, (95), 92 states have internal predecessors, (95), 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) [2022-03-20 19:01:44,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2022-03-20 19:01:44,634 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 93 [2022-03-20 19:01:44,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:44,634 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2022-03-20 19:01:44,634 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 43 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) [2022-03-20 19:01:44,634 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2022-03-20 19:01:44,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-03-20 19:01:44,635 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:44,635 INFO L499 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:44,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-20 19:01:44,843 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 [2022-03-20 19:01:44,843 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:44,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:44,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1883112957, now seen corresponding path program 81 times [2022-03-20 19:01:44,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:44,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2144552814] [2022-03-20 19:01:45,025 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:01:45,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1214165648, now seen corresponding path program 1 times [2022-03-20 19:01:45,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:45,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419972910] [2022-03-20 19:01:45,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:45,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:45,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:01:45,028 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:01:45,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:01:45,029 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:01:45,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1883112957, now seen corresponding path program 82 times [2022-03-20 19:01:45,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:45,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301197882] [2022-03-20 19:01:45,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:45,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:45,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:45,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:45,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:45,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 42 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:45,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:45,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301197882] [2022-03-20 19:01:45,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301197882] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:01:45,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759435242] [2022-03-20 19:01:45,635 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:01:45,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:01:45,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:01:45,637 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) [2022-03-20 19:01:45,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-20 19:01:45,675 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:01:45,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:01:45,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-20 19:01:45,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:01:45,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 42 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:45,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:01:47,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 42 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:47,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759435242] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:01:47,537 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:01:47,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 88 [2022-03-20 19:01:47,538 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:47,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2144552814] [2022-03-20 19:01:47,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2144552814] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:47,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:47,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-03-20 19:01:47,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835413218] [2022-03-20 19:01:47,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:47,538 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-20 19:01:47,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:47,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-20 19:01:47,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2022-03-20 19:01:47,539 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand has 45 states, 45 states have (on average 2.022222222222222) internal successors, (91), 44 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) [2022-03-20 19:01:48,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:48,322 INFO L93 Difference]: Finished difference Result 106 states and 110 transitions. [2022-03-20 19:01:48,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-20 19:01:48,323 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.022222222222222) internal successors, (91), 44 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 [2022-03-20 19:01:48,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:48,323 INFO L225 Difference]: With dead ends: 106 [2022-03-20 19:01:48,323 INFO L226 Difference]: Without dead ends: 99 [2022-03-20 19:01:48,324 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1106 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=7398, Invalid=9372, Unknown=0, NotChecked=0, Total=16770 [2022-03-20 19:01:48,324 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 50 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:48,324 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 24 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:01:48,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-03-20 19:01:48,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-03-20 19:01:48,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.0319148936170213) internal successors, (97), 94 states have internal predecessors, (97), 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) [2022-03-20 19:01:48,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2022-03-20 19:01:48,328 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 95 [2022-03-20 19:01:48,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:48,328 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2022-03-20 19:01:48,328 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.022222222222222) internal successors, (91), 44 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) [2022-03-20 19:01:48,328 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2022-03-20 19:01:48,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-20 19:01:48,328 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:48,328 INFO L499 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:48,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-20 19:01:48,529 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 [2022-03-20 19:01:48,529 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:48,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:48,529 INFO L85 PathProgramCache]: Analyzing trace with hash 422064352, now seen corresponding path program 83 times [2022-03-20 19:01:48,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:48,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [223517832] [2022-03-20 19:01:48,726 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:01:48,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1273270992, now seen corresponding path program 1 times [2022-03-20 19:01:48,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:48,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315284236] [2022-03-20 19:01:48,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:48,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:48,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:01:48,729 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:01:48,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:01:48,731 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:01:48,731 INFO L85 PathProgramCache]: Analyzing trace with hash 422064352, now seen corresponding path program 84 times [2022-03-20 19:01:48,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:48,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982701889] [2022-03-20 19:01:48,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:48,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:48,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:49,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:49,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:49,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 43 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:49,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:49,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982701889] [2022-03-20 19:01:49,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982701889] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:01:49,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253253421] [2022-03-20 19:01:49,224 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 19:01:49,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:01:49,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:01:49,234 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) [2022-03-20 19:01:49,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-20 19:01:49,259 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 19:01:49,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:01:49,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 19:01:49,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:01:49,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 126 proven. 1 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2022-03-20 19:01:49,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:01:49,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 126 proven. 1 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2022-03-20 19:01:49,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253253421] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:01:49,430 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:01:49,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 4, 4] total 50 [2022-03-20 19:01:49,431 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:49,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [223517832] [2022-03-20 19:01:49,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [223517832] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:49,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:49,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-03-20 19:01:49,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850293550] [2022-03-20 19:01:49,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:49,431 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-20 19:01:49,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:49,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-20 19:01:49,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-03-20 19:01:49,447 INFO L87 Difference]: Start difference. First operand 99 states and 101 transitions. Second operand has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 45 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) [2022-03-20 19:01:49,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:49,963 INFO L93 Difference]: Finished difference Result 108 states and 112 transitions. [2022-03-20 19:01:49,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-20 19:01:49,963 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 45 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 [2022-03-20 19:01:49,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:49,964 INFO L225 Difference]: With dead ends: 108 [2022-03-20 19:01:49,964 INFO L226 Difference]: Without dead ends: 101 [2022-03-20 19:01:49,964 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=3328, Invalid=5228, Unknown=0, NotChecked=0, Total=8556 [2022-03-20 19:01:49,965 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 51 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:49,966 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 29 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:01:49,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-03-20 19:01:49,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2022-03-20 19:01:49,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.03125) internal successors, (99), 96 states have internal predecessors, (99), 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) [2022-03-20 19:01:49,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2022-03-20 19:01:49,984 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 97 [2022-03-20 19:01:49,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:49,984 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2022-03-20 19:01:49,984 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 45 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) [2022-03-20 19:01:49,984 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2022-03-20 19:01:49,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-20 19:01:49,984 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:49,984 INFO L499 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:50,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-20 19:01:50,201 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 [2022-03-20 19:01:50,202 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:50,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:50,202 INFO L85 PathProgramCache]: Analyzing trace with hash -505666435, now seen corresponding path program 85 times [2022-03-20 19:01:50,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:50,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1205091018] [2022-03-20 19:01:50,331 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:01:50,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1332376336, now seen corresponding path program 1 times [2022-03-20 19:01:50,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:50,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514853920] [2022-03-20 19:01:50,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:50,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:50,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:01:50,333 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:01:50,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:01:50,335 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:01:50,335 INFO L85 PathProgramCache]: Analyzing trace with hash -505666435, now seen corresponding path program 86 times [2022-03-20 19:01:50,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:50,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613362723] [2022-03-20 19:01:50,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:50,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:50,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:50,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:50,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:50,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 44 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:50,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:50,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613362723] [2022-03-20 19:01:50,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613362723] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:01:50,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533732030] [2022-03-20 19:01:50,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:01:50,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:01:50,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:01:50,760 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) [2022-03-20 19:01:50,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-20 19:01:50,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:01:50,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:01:50,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-20 19:01:50,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:01:50,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 44 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:50,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:01:52,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 44 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:52,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533732030] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:01:52,522 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:01:52,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 92 [2022-03-20 19:01:52,523 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:52,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1205091018] [2022-03-20 19:01:52,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1205091018] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:52,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:52,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-03-20 19:01:52,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039693691] [2022-03-20 19:01:52,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:52,523 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-20 19:01:52,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:52,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-20 19:01:52,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2022-03-20 19:01:52,524 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 46 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) [2022-03-20 19:01:53,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:53,146 INFO L93 Difference]: Finished difference Result 110 states and 114 transitions. [2022-03-20 19:01:53,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-20 19:01:53,146 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 46 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 [2022-03-20 19:01:53,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:53,147 INFO L225 Difference]: With dead ends: 110 [2022-03-20 19:01:53,147 INFO L226 Difference]: Without dead ends: 103 [2022-03-20 19:01:53,149 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=8102, Invalid=10258, Unknown=0, NotChecked=0, Total=18360 [2022-03-20 19:01:53,149 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 52 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:53,149 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 24 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:01:53,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-20 19:01:53,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-03-20 19:01:53,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.030612244897959) internal successors, (101), 98 states have internal predecessors, (101), 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) [2022-03-20 19:01:53,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 105 transitions. [2022-03-20 19:01:53,153 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 105 transitions. Word has length 99 [2022-03-20 19:01:53,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:53,153 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 105 transitions. [2022-03-20 19:01:53,153 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 46 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) [2022-03-20 19:01:53,153 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 105 transitions. [2022-03-20 19:01:53,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-03-20 19:01:53,153 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:53,153 INFO L499 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:53,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-20 19:01:53,363 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 [2022-03-20 19:01:53,363 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:53,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:53,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1298244826, now seen corresponding path program 87 times [2022-03-20 19:01:53,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:53,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [737201328] [2022-03-20 19:01:53,577 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:01:53,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1391481680, now seen corresponding path program 1 times [2022-03-20 19:01:53,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:53,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848931061] [2022-03-20 19:01:53,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:53,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:53,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:01:53,579 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:01:53,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:01:53,581 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:01:53,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1298244826, now seen corresponding path program 88 times [2022-03-20 19:01:53,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:53,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8852206] [2022-03-20 19:01:53,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:53,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:53,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:54,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:54,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:54,335 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 45 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:54,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:54,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8852206] [2022-03-20 19:01:54,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8852206] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:01:54,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046096041] [2022-03-20 19:01:54,336 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:01:54,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:01:54,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:01:54,337 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) [2022-03-20 19:01:54,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-20 19:01:54,376 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:01:54,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:01:54,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-20 19:01:54,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:01:54,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 45 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:54,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:01:56,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 45 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:56,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046096041] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:01:56,205 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:01:56,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47, 47] total 94 [2022-03-20 19:01:56,205 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:56,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [737201328] [2022-03-20 19:01:56,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [737201328] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:56,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:56,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-03-20 19:01:56,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589937018] [2022-03-20 19:01:56,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:56,206 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-20 19:01:56,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:56,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-20 19:01:56,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2022-03-20 19:01:56,207 INFO L87 Difference]: Start difference. First operand 103 states and 105 transitions. Second operand has 48 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 47 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) [2022-03-20 19:01:57,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:57,156 INFO L93 Difference]: Finished difference Result 112 states and 116 transitions. [2022-03-20 19:01:57,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-20 19:01:57,156 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 47 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 [2022-03-20 19:01:57,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:57,157 INFO L225 Difference]: With dead ends: 112 [2022-03-20 19:01:57,157 INFO L226 Difference]: Without dead ends: 105 [2022-03-20 19:01:57,159 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=8466, Invalid=10716, Unknown=0, NotChecked=0, Total=19182 [2022-03-20 19:01:57,159 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 53 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:57,159 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 34 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:01:57,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-03-20 19:01:57,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-03-20 19:01:57,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.03) internal successors, (103), 100 states have internal predecessors, (103), 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) [2022-03-20 19:01:57,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2022-03-20 19:01:57,175 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 101 [2022-03-20 19:01:57,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:57,175 INFO L478 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2022-03-20 19:01:57,176 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 47 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) [2022-03-20 19:01:57,176 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2022-03-20 19:01:57,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-03-20 19:01:57,176 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:57,176 INFO L499 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:57,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-20 19:01:57,387 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 [2022-03-20 19:01:57,387 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:57,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:57,388 INFO L85 PathProgramCache]: Analyzing trace with hash -309820937, now seen corresponding path program 89 times [2022-03-20 19:01:57,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:57,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [685746937] [2022-03-20 19:01:57,511 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:01:57,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1450587024, now seen corresponding path program 1 times [2022-03-20 19:01:57,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:57,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699013728] [2022-03-20 19:01:57,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:57,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:57,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:01:57,514 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:01:57,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:01:57,517 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:01:57,517 INFO L85 PathProgramCache]: Analyzing trace with hash -309820937, now seen corresponding path program 90 times [2022-03-20 19:01:57,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:57,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146530380] [2022-03-20 19:01:57,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:57,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:57,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:58,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:58,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:58,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 46 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:58,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:58,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146530380] [2022-03-20 19:01:58,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146530380] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:01:58,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275700866] [2022-03-20 19:01:58,190 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 19:01:58,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:01:58,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:01:58,193 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) [2022-03-20 19:01:58,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-20 19:01:58,220 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 19:01:58,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:01:58,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 19:01:58,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:01:58,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 135 proven. 1 refuted. 0 times theorem prover too weak. 1980 trivial. 0 not checked. [2022-03-20 19:01:58,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:01:58,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 135 proven. 1 refuted. 0 times theorem prover too weak. 1980 trivial. 0 not checked. [2022-03-20 19:01:58,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275700866] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:01:58,446 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:01:58,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 4, 4] total 53 [2022-03-20 19:01:58,446 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:58,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [685746937] [2022-03-20 19:01:58,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [685746937] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:58,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:58,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-03-20 19:01:58,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200851232] [2022-03-20 19:01:58,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:58,447 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-20 19:01:58,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:58,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-20 19:01:58,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2022-03-20 19:01:58,448 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 48 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) [2022-03-20 19:01:59,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:59,052 INFO L93 Difference]: Finished difference Result 114 states and 118 transitions. [2022-03-20 19:01:59,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-20 19:01:59,052 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 48 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 [2022-03-20 19:01:59,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:59,053 INFO L225 Difference]: With dead ends: 114 [2022-03-20 19:01:59,053 INFO L226 Difference]: Without dead ends: 107 [2022-03-20 19:01:59,054 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3766, Invalid=5936, Unknown=0, NotChecked=0, Total=9702 [2022-03-20 19:01:59,056 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 54 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:59,056 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 39 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:01:59,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-03-20 19:01:59,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2022-03-20 19:01:59,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.0294117647058822) internal successors, (105), 102 states have internal predecessors, (105), 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) [2022-03-20 19:01:59,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 109 transitions. [2022-03-20 19:01:59,068 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 109 transitions. Word has length 103 [2022-03-20 19:01:59,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:59,068 INFO L478 AbstractCegarLoop]: Abstraction has 107 states and 109 transitions. [2022-03-20 19:01:59,068 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 48 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) [2022-03-20 19:01:59,068 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 109 transitions. [2022-03-20 19:01:59,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-20 19:01:59,069 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:59,069 INFO L499 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:59,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-20 19:01:59,275 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 [2022-03-20 19:01:59,275 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:59,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:59,276 INFO L85 PathProgramCache]: Analyzing trace with hash 527207380, now seen corresponding path program 91 times [2022-03-20 19:01:59,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:59,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [477574352] [2022-03-20 19:01:59,420 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:01:59,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1509692368, now seen corresponding path program 1 times [2022-03-20 19:01:59,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:59,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847884871] [2022-03-20 19:01:59,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:59,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:59,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:01:59,423 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:01:59,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:01:59,425 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:01:59,425 INFO L85 PathProgramCache]: Analyzing trace with hash 527207380, now seen corresponding path program 92 times [2022-03-20 19:01:59,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:59,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998353296] [2022-03-20 19:01:59,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:59,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:59,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:02:00,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:02:00,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:02:00,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 47 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:02:00,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:02:00,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998353296] [2022-03-20 19:02:00,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998353296] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:02:00,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471137341] [2022-03-20 19:02:00,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:02:00,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:02:00,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:02:00,182 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) [2022-03-20 19:02:00,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-20 19:02:00,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:02:00,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:02:00,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-20 19:02:00,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:02:00,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 47 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:02:00,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:02:01,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 47 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:02:01,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471137341] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:02:01,804 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:02:01,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 49] total 98 [2022-03-20 19:02:01,804 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:02:01,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [477574352] [2022-03-20 19:02:01,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [477574352] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:02:01,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:02:01,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-03-20 19:02:01,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555327580] [2022-03-20 19:02:01,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:02:01,804 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-20 19:02:01,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:02:01,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-20 19:02:01,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-03-20 19:02:01,805 INFO L87 Difference]: Start difference. First operand 107 states and 109 transitions. Second operand has 50 states, 50 states have (on average 2.02) internal successors, (101), 49 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) [2022-03-20 19:02:02,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:02:02,406 INFO L93 Difference]: Finished difference Result 116 states and 120 transitions. [2022-03-20 19:02:02,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-20 19:02:02,406 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.02) internal successors, (101), 49 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 [2022-03-20 19:02:02,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:02:02,407 INFO L225 Difference]: With dead ends: 116 [2022-03-20 19:02:02,407 INFO L226 Difference]: Without dead ends: 109 [2022-03-20 19:02:02,408 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1356 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=9218, Invalid=11662, Unknown=0, NotChecked=0, Total=20880 [2022-03-20 19:02:02,409 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 55 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:02:02,409 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 49 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:02:02,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-03-20 19:02:02,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2022-03-20 19:02:02,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.0288461538461537) internal successors, (107), 104 states have internal predecessors, (107), 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) [2022-03-20 19:02:02,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 111 transitions. [2022-03-20 19:02:02,431 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 111 transitions. Word has length 105 [2022-03-20 19:02:02,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:02:02,431 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 111 transitions. [2022-03-20 19:02:02,431 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.02) internal successors, (101), 49 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) [2022-03-20 19:02:02,431 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 111 transitions. [2022-03-20 19:02:02,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-03-20 19:02:02,431 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:02:02,431 INFO L499 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:02:02,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-20 19:02:02,647 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 [2022-03-20 19:02:02,647 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:02:02,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:02:02,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1752535665, now seen corresponding path program 93 times [2022-03-20 19:02:02,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:02:02,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [810436220] [2022-03-20 19:02:02,849 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:02:02,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1568797712, now seen corresponding path program 1 times [2022-03-20 19:02:02,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:02:02,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665418629] [2022-03-20 19:02:02,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:02:02,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:02:02,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:02:02,852 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:02:02,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:02:02,855 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:02:02,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1752535665, now seen corresponding path program 94 times [2022-03-20 19:02:02,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:02:02,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428561334] [2022-03-20 19:02:02,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:02:02,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:02:02,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:02:03,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:02:03,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:02:03,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 48 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:02:03,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:02:03,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428561334] [2022-03-20 19:02:03,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428561334] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:02:03,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61761080] [2022-03-20 19:02:03,642 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:02:03,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:02:03,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:02:03,643 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) [2022-03-20 19:02:03,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-20 19:02:03,685 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:02:03,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:02:03,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-20 19:02:03,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:02:03,815 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 48 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:02:03,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:02:05,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 48 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:02:05,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61761080] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:02:05,139 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:02:05,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 100 [2022-03-20 19:02:05,139 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:02:05,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [810436220] [2022-03-20 19:02:05,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [810436220] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:02:05,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:02:05,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-03-20 19:02:05,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268723246] [2022-03-20 19:02:05,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:02:05,140 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-20 19:02:05,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:02:05,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-20 19:02:05,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2022-03-20 19:02:05,141 INFO L87 Difference]: Start difference. First operand 109 states and 111 transitions. Second operand has 51 states, 51 states have (on average 2.019607843137255) internal successors, (103), 50 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) [2022-03-20 19:02:05,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:02:05,998 INFO L93 Difference]: Finished difference Result 118 states and 122 transitions. [2022-03-20 19:02:05,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-20 19:02:05,998 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.019607843137255) internal successors, (103), 50 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 [2022-03-20 19:02:05,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:02:05,999 INFO L225 Difference]: With dead ends: 118 [2022-03-20 19:02:05,999 INFO L226 Difference]: Without dead ends: 111 [2022-03-20 19:02:06,000 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1409 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=9606, Invalid=12150, Unknown=0, NotChecked=0, Total=21756 [2022-03-20 19:02:06,001 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 56 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:02:06,001 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 29 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:02:06,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-03-20 19:02:06,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2022-03-20 19:02:06,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.028301886792453) internal successors, (109), 106 states have internal predecessors, (109), 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) [2022-03-20 19:02:06,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2022-03-20 19:02:06,005 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 107 [2022-03-20 19:02:06,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:02:06,005 INFO L478 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2022-03-20 19:02:06,005 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.019607843137255) internal successors, (103), 50 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) [2022-03-20 19:02:06,005 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2022-03-20 19:02:06,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-03-20 19:02:06,005 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:02:06,005 INFO L499 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:02:06,047 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-03-20 19:02:06,214 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 [2022-03-20 19:02:06,215 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:02:06,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:02:06,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1822988850, now seen corresponding path program 95 times [2022-03-20 19:02:06,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:02:06,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [548506655] [2022-03-20 19:02:06,364 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:02:06,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1627903056, now seen corresponding path program 1 times [2022-03-20 19:02:06,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:02:06,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059796021] [2022-03-20 19:02:06,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:02:06,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:02:06,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:02:06,367 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:02:06,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:02:06,368 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:02:06,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1822988850, now seen corresponding path program 96 times [2022-03-20 19:02:06,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:02:06,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497458575] [2022-03-20 19:02:06,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:02:06,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:02:06,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:02:06,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:02:06,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:02:06,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 49 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:02:06,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:02:06,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497458575] [2022-03-20 19:02:06,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497458575] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:02:06,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622076566] [2022-03-20 19:02:06,975 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 19:02:06,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:02:06,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:02:06,977 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) [2022-03-20 19:02:06,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-20 19:02:07,002 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 19:02:07,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:02:07,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 19:02:07,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:02:07,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 144 proven. 1 refuted. 0 times theorem prover too weak. 2256 trivial. 0 not checked. [2022-03-20 19:02:07,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:02:07,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 144 proven. 1 refuted. 0 times theorem prover too weak. 2256 trivial. 0 not checked. [2022-03-20 19:02:07,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622076566] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:02:07,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:02:07,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 4, 4] total 56 [2022-03-20 19:02:07,188 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:02:07,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [548506655] [2022-03-20 19:02:07,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [548506655] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:02:07,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:02:07,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-03-20 19:02:07,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45556123] [2022-03-20 19:02:07,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:02:07,188 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-03-20 19:02:07,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:02:07,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-03-20 19:02:07,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2022-03-20 19:02:07,189 INFO L87 Difference]: Start difference. First operand 111 states and 113 transitions. Second operand has 52 states, 52 states have (on average 2.019230769230769) internal successors, (105), 51 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) [2022-03-20 19:02:07,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:02:07,845 INFO L93 Difference]: Finished difference Result 120 states and 124 transitions. [2022-03-20 19:02:07,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-20 19:02:07,845 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.019230769230769) internal successors, (105), 51 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 [2022-03-20 19:02:07,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:02:07,847 INFO L225 Difference]: With dead ends: 120 [2022-03-20 19:02:07,847 INFO L226 Difference]: Without dead ends: 113 [2022-03-20 19:02:07,847 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=4231, Invalid=6689, Unknown=0, NotChecked=0, Total=10920 [2022-03-20 19:02:07,847 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 57 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:02:07,848 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 24 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:02:07,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-03-20 19:02:07,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2022-03-20 19:02:07,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.0277777777777777) internal successors, (111), 108 states have internal predecessors, (111), 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) [2022-03-20 19:02:07,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 115 transitions. [2022-03-20 19:02:07,851 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 115 transitions. Word has length 109 [2022-03-20 19:02:07,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:02:07,852 INFO L478 AbstractCegarLoop]: Abstraction has 113 states and 115 transitions. [2022-03-20 19:02:07,852 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.019230769230769) internal successors, (105), 51 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) [2022-03-20 19:02:07,852 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 115 transitions. [2022-03-20 19:02:07,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-03-20 19:02:07,852 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:02:07,852 INFO L499 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:02:07,869 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-03-20 19:02:08,068 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 [2022-03-20 19:02:08,069 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:02:08,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:02:08,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1928210965, now seen corresponding path program 97 times [2022-03-20 19:02:08,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:02:08,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2033150478] [2022-03-20 19:02:08,209 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:02:08,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1687008400, now seen corresponding path program 1 times [2022-03-20 19:02:08,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:02:08,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921040162] [2022-03-20 19:02:08,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:02:08,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:02:08,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:02:08,212 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:02:08,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:02:08,218 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:02:08,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1928210965, now seen corresponding path program 98 times [2022-03-20 19:02:08,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:02:08,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359198253] [2022-03-20 19:02:08,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:02:08,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:02:08,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:02:08,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:02:08,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:02:09,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 50 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:02:09,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:02:09,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359198253] [2022-03-20 19:02:09,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359198253] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:02:09,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126960340] [2022-03-20 19:02:09,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:02:09,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:02:09,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:02:09,001 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) [2022-03-20 19:02:09,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-20 19:02:09,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:02:09,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:02:09,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-20 19:02:09,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:02:09,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 50 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:02:09,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:02:11,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 50 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:02:11,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126960340] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:02:11,287 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:02:11,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 52] total 104 [2022-03-20 19:02:11,287 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:02:11,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2033150478] [2022-03-20 19:02:11,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2033150478] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:02:11,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:02:11,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-03-20 19:02:11,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375256211] [2022-03-20 19:02:11,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:02:11,287 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-20 19:02:11,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:02:11,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-20 19:02:11,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 19:02:11,288 INFO L87 Difference]: Start difference. First operand 113 states and 115 transitions. Second operand has 53 states, 53 states have (on average 2.018867924528302) internal successors, (107), 52 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) [2022-03-20 19:02:12,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:02:12,017 INFO L93 Difference]: Finished difference Result 122 states and 126 transitions. [2022-03-20 19:02:12,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-20 19:02:12,018 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.018867924528302) internal successors, (107), 52 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 [2022-03-20 19:02:12,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:02:12,018 INFO L225 Difference]: With dead ends: 122 [2022-03-20 19:02:12,018 INFO L226 Difference]: Without dead ends: 115 [2022-03-20 19:02:12,021 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1518 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=10406, Invalid=13156, Unknown=0, NotChecked=0, Total=23562 [2022-03-20 19:02:12,021 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 58 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:02:12,021 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 54 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:02:12,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-03-20 19:02:12,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2022-03-20 19:02:12,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.0272727272727273) internal successors, (113), 110 states have internal predecessors, (113), 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) [2022-03-20 19:02:12,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2022-03-20 19:02:12,025 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 111 [2022-03-20 19:02:12,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:02:12,025 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2022-03-20 19:02:12,025 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.018867924528302) internal successors, (107), 52 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) [2022-03-20 19:02:12,025 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2022-03-20 19:02:12,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-20 19:02:12,026 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:02:12,026 INFO L499 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:02:12,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-20 19:02:12,242 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 [2022-03-20 19:02:12,242 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:02:12,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:02:12,242 INFO L85 PathProgramCache]: Analyzing trace with hash 32551624, now seen corresponding path program 99 times [2022-03-20 19:02:12,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:02:12,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1867728672] [2022-03-20 19:02:12,460 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:02:12,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1746113744, now seen corresponding path program 1 times [2022-03-20 19:02:12,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:02:12,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630514368] [2022-03-20 19:02:12,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:02:12,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:02:12,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:02:12,463 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:02:12,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:02:12,465 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:02:12,465 INFO L85 PathProgramCache]: Analyzing trace with hash 32551624, now seen corresponding path program 100 times [2022-03-20 19:02:12,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:02:12,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092775857] [2022-03-20 19:02:12,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:02:12,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:02:12,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:02:13,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:02:13,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:02:13,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 51 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:02:13,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:02:13,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092775857] [2022-03-20 19:02:13,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092775857] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:02:13,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904624828] [2022-03-20 19:02:13,236 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:02:13,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:02:13,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:02:13,237 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) [2022-03-20 19:02:13,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-20 19:02:13,275 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:02:13,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:02:13,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-20 19:02:13,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:02:13,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 51 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:02:13,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:02:14,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 51 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:02:14,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904624828] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:02:14,906 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:02:14,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53, 53] total 106 [2022-03-20 19:02:14,906 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:02:14,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1867728672] [2022-03-20 19:02:14,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1867728672] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:02:14,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:02:14,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-03-20 19:02:14,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000942982] [2022-03-20 19:02:14,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:02:14,906 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-03-20 19:02:14,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:02:14,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-03-20 19:02:14,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2022-03-20 19:02:14,907 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand has 54 states, 54 states have (on average 2.0185185185185186) internal successors, (109), 53 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) [2022-03-20 19:02:15,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:02:15,613 INFO L93 Difference]: Finished difference Result 124 states and 128 transitions. [2022-03-20 19:02:15,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-20 19:02:15,613 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0185185185185186) internal successors, (109), 53 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 [2022-03-20 19:02:15,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:02:15,614 INFO L225 Difference]: With dead ends: 124 [2022-03-20 19:02:15,614 INFO L226 Difference]: Without dead ends: 117 [2022-03-20 19:02:15,617 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1574 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=10818, Invalid=13674, Unknown=0, NotChecked=0, Total=24492 [2022-03-20 19:02:15,617 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 59 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:02:15,617 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 59 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:02:15,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-03-20 19:02:15,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2022-03-20 19:02:15,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.0267857142857142) internal successors, (115), 112 states have internal predecessors, (115), 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) [2022-03-20 19:02:15,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 119 transitions. [2022-03-20 19:02:15,621 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 119 transitions. Word has length 113 [2022-03-20 19:02:15,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:02:15,621 INFO L478 AbstractCegarLoop]: Abstraction has 117 states and 119 transitions. [2022-03-20 19:02:15,621 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.0185185185185186) internal successors, (109), 53 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) [2022-03-20 19:02:15,621 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 119 transitions. [2022-03-20 19:02:15,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-20 19:02:15,622 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:02:15,622 INFO L499 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:02:15,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-03-20 19:02:15,838 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 [2022-03-20 19:02:15,839 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:02:15,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:02:15,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1165243291, now seen corresponding path program 101 times [2022-03-20 19:02:15,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:02:15,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2017013056] [2022-03-20 19:02:16,049 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:02:16,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1805219088, now seen corresponding path program 1 times [2022-03-20 19:02:16,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:02:16,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902041709] [2022-03-20 19:02:16,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:02:16,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:02:16,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:02:16,051 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:02:16,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:02:16,053 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:02:16,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1165243291, now seen corresponding path program 102 times [2022-03-20 19:02:16,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:02:16,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732424407] [2022-03-20 19:02:16,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:02:16,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:02:16,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:02:16,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:02:16,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:02:16,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 52 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:02:16,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:02:16,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732424407] [2022-03-20 19:02:16,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732424407] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:02:16,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236989867] [2022-03-20 19:02:16,643 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 19:02:16,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:02:16,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:02:16,644 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) [2022-03-20 19:02:16,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-20 19:02:16,670 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 19:02:16,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:02:16,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 19:02:16,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:02:16,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 153 proven. 1 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2022-03-20 19:02:16,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:02:16,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 153 proven. 1 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2022-03-20 19:02:16,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236989867] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:02:16,872 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:02:16,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 4, 4] total 59 [2022-03-20 19:02:16,872 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:02:16,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2017013056] [2022-03-20 19:02:16,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2017013056] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:02:16,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:02:16,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-03-20 19:02:16,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943539826] [2022-03-20 19:02:16,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:02:16,873 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-20 19:02:16,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:02:16,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-20 19:02:16,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2022-03-20 19:02:16,874 INFO L87 Difference]: Start difference. First operand 117 states and 119 transitions. Second operand has 55 states, 55 states have (on average 2.018181818181818) internal successors, (111), 54 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) [2022-03-20 19:02:17,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:02:17,726 INFO L93 Difference]: Finished difference Result 126 states and 130 transitions. [2022-03-20 19:02:17,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-20 19:02:17,726 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.018181818181818) internal successors, (111), 54 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 [2022-03-20 19:02:17,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:02:17,727 INFO L225 Difference]: With dead ends: 126 [2022-03-20 19:02:17,727 INFO L226 Difference]: Without dead ends: 119 [2022-03-20 19:02:17,728 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=4723, Invalid=7487, Unknown=0, NotChecked=0, Total=12210 [2022-03-20 19:02:17,728 INFO L913 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 [2022-03-20 19:02:17,728 INFO L914 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] [2022-03-20 19:02:17,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-03-20 19:02:17,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2022-03-20 19:02:17,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.0263157894736843) internal successors, (117), 114 states have internal predecessors, (117), 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) [2022-03-20 19:02:17,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2022-03-20 19:02:17,732 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 115 [2022-03-20 19:02:17,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:02:17,732 INFO L478 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2022-03-20 19:02:17,732 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.018181818181818) internal successors, (111), 54 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) [2022-03-20 19:02:17,732 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2022-03-20 19:02:17,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-03-20 19:02:17,733 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:02:17,733 INFO L499 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:02:17,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-20 19:02:17,933 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 [2022-03-20 19:02:17,933 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:02:17,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:02:17,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1194921278, now seen corresponding path program 103 times [2022-03-20 19:02:17,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:02:17,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [795224492] [2022-03-20 19:02:18,064 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:02:18,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1864324432, now seen corresponding path program 1 times [2022-03-20 19:02:18,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:02:18,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739365112] [2022-03-20 19:02:18,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:02:18,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:02:18,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:02:18,066 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:02:18,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:02:18,068 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:02:18,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1194921278, now seen corresponding path program 104 times [2022-03-20 19:02:18,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:02:18,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264866297] [2022-03-20 19:02:18,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:02:18,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:02:18,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:02:18,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:02:18,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:02:18,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 53 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:02:18,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:02:18,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264866297] [2022-03-20 19:02:18,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264866297] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:02:18,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765636383] [2022-03-20 19:02:18,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:02:18,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:02:18,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:02:18,806 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) [2022-03-20 19:02:18,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-20 19:02:18,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:02:18,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:02:18,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 54 conjunts are in the unsatisfiable core [2022-03-20 19:02:18,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:02:19,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 53 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:02:19,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:02:20,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 53 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:02:20,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765636383] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:02:20,652 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:02:20,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55, 55] total 110 [2022-03-20 19:02:20,652 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:02:20,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [795224492] [2022-03-20 19:02:20,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [795224492] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:02:20,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:02:20,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-03-20 19:02:20,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005538439] [2022-03-20 19:02:20,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:02:20,653 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-03-20 19:02:20,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:02:20,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-03-20 19:02:20,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2022-03-20 19:02:20,655 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand has 56 states, 56 states have (on average 2.017857142857143) internal successors, (113), 55 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) [2022-03-20 19:02:21,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:02:21,742 INFO L93 Difference]: Finished difference Result 128 states and 132 transitions. [2022-03-20 19:02:21,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-20 19:02:21,742 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.017857142857143) internal successors, (113), 55 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 [2022-03-20 19:02:21,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:02:21,742 INFO L225 Difference]: With dead ends: 128 [2022-03-20 19:02:21,742 INFO L226 Difference]: Without dead ends: 121 [2022-03-20 19:02:21,744 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1689 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=11666, Invalid=14740, Unknown=0, NotChecked=0, Total=26406 [2022-03-20 19:02:21,745 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 61 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:02:21,745 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 24 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:02:21,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-03-20 19:02:21,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-03-20 19:02:21,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.0258620689655173) internal successors, (119), 116 states have internal predecessors, (119), 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) [2022-03-20 19:02:21,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 123 transitions. [2022-03-20 19:02:21,748 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 123 transitions. Word has length 117 [2022-03-20 19:02:21,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:02:21,749 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 123 transitions. [2022-03-20 19:02:21,749 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.017857142857143) internal successors, (113), 55 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) [2022-03-20 19:02:21,749 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 123 transitions. [2022-03-20 19:02:21,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-03-20 19:02:21,749 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:02:21,749 INFO L499 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:02:21,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-20 19:02:21,965 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 [2022-03-20 19:02:21,965 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:02:21,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:02:21,966 INFO L85 PathProgramCache]: Analyzing trace with hash 349304287, now seen corresponding path program 105 times [2022-03-20 19:02:21,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:02:21,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2134895942] [2022-03-20 19:02:22,231 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:02:22,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1923429776, now seen corresponding path program 1 times [2022-03-20 19:02:22,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:02:22,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421388803] [2022-03-20 19:02:22,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:02:22,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:02:22,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:02:22,233 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:02:22,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:02:22,238 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:02:22,238 INFO L85 PathProgramCache]: Analyzing trace with hash 349304287, now seen corresponding path program 106 times [2022-03-20 19:02:22,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:02:22,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388077646] [2022-03-20 19:02:22,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:02:22,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:02:22,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:02:23,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:02:23,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:02:23,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 54 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:02:23,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:02:23,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388077646] [2022-03-20 19:02:23,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388077646] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:02:23,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181698130] [2022-03-20 19:02:23,063 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:02:23,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:02:23,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:02:23,064 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) [2022-03-20 19:02:23,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-20 19:02:23,104 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:02:23,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:02:23,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-20 19:02:23,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:02:23,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 54 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:02:23,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:02:24,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 54 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:02:24,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181698130] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:02:24,825 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:02:24,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56, 56] total 112 [2022-03-20 19:02:24,825 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:02:24,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2134895942] [2022-03-20 19:02:24,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2134895942] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:02:24,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:02:24,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-03-20 19:02:24,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768651489] [2022-03-20 19:02:24,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:02:24,826 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-03-20 19:02:24,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:02:24,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-03-20 19:02:24,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6107, Invalid=6325, Unknown=0, NotChecked=0, Total=12432 [2022-03-20 19:02:24,828 INFO L87 Difference]: Start difference. First operand 121 states and 123 transitions. Second operand has 57 states, 57 states have (on average 2.017543859649123) internal successors, (115), 56 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) [2022-03-20 19:02:25,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:02:25,600 INFO L93 Difference]: Finished difference Result 130 states and 134 transitions. [2022-03-20 19:02:25,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-20 19:02:25,600 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.017543859649123) internal successors, (115), 56 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 [2022-03-20 19:02:25,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:02:25,601 INFO L225 Difference]: With dead ends: 130 [2022-03-20 19:02:25,601 INFO L226 Difference]: Without dead ends: 123 [2022-03-20 19:02:25,603 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1748 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=12102, Invalid=15288, Unknown=0, NotChecked=0, Total=27390 [2022-03-20 19:02:25,603 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 62 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:02:25,603 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 29 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:02:25,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-03-20 19:02:25,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2022-03-20 19:02:25,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.0254237288135593) internal successors, (121), 118 states have internal predecessors, (121), 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) [2022-03-20 19:02:25,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 125 transitions. [2022-03-20 19:02:25,607 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 125 transitions. Word has length 119 [2022-03-20 19:02:25,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:02:25,607 INFO L478 AbstractCegarLoop]: Abstraction has 123 states and 125 transitions. [2022-03-20 19:02:25,607 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.017543859649123) internal successors, (115), 56 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) [2022-03-20 19:02:25,607 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 125 transitions. [2022-03-20 19:02:25,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-03-20 19:02:25,608 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:02:25,608 INFO L499 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:02:25,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-20 19:02:25,823 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 [2022-03-20 19:02:25,823 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:02:25,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:02:25,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1708612164, now seen corresponding path program 107 times [2022-03-20 19:02:25,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:02:25,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1382508905] [2022-03-20 19:02:25,992 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:02:25,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1982535120, now seen corresponding path program 1 times [2022-03-20 19:02:25,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:02:25,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261398293] [2022-03-20 19:02:25,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:02:25,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:02:25,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:02:25,995 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:02:25,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:02:25,997 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:02:25,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1708612164, now seen corresponding path program 108 times [2022-03-20 19:02:25,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:02:25,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654789171] [2022-03-20 19:02:25,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:02:25,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:02:26,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:02:26,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:02:26,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:02:26,654 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 55 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:02:26,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:02:26,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654789171] [2022-03-20 19:02:26,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654789171] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:02:26,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236466945] [2022-03-20 19:02:26,654 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 19:02:26,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:02:26,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:02:26,655 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) [2022-03-20 19:02:26,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-20 19:02:26,689 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 19:02:26,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:02:26,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 19:02:26,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:02:26,819 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 162 proven. 1 refuted. 0 times theorem prover too weak. 2862 trivial. 0 not checked. [2022-03-20 19:02:26,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:02:26,918 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 162 proven. 1 refuted. 0 times theorem prover too weak. 2862 trivial. 0 not checked. [2022-03-20 19:02:26,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236466945] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:02:26,919 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:02:26,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 4, 4] total 62 [2022-03-20 19:02:26,919 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:02:26,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1382508905] [2022-03-20 19:02:26,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1382508905] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:02:26,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:02:26,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-03-20 19:02:26,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896333661] [2022-03-20 19:02:26,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:02:26,920 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-03-20 19:02:26,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:02:26,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-03-20 19:02:26,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2022-03-20 19:02:26,921 INFO L87 Difference]: Start difference. First operand 123 states and 125 transitions. Second operand has 58 states, 58 states have (on average 2.0172413793103448) internal successors, (117), 57 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) [2022-03-20 19:02:27,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:02:27,713 INFO L93 Difference]: Finished difference Result 132 states and 136 transitions. [2022-03-20 19:02:27,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-20 19:02:27,713 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.0172413793103448) internal successors, (117), 57 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 [2022-03-20 19:02:27,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:02:27,714 INFO L225 Difference]: With dead ends: 132 [2022-03-20 19:02:27,714 INFO L226 Difference]: Without dead ends: 125 [2022-03-20 19:02:27,715 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=5242, Invalid=8330, Unknown=0, NotChecked=0, Total=13572 [2022-03-20 19:02:27,718 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 63 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:02:27,718 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 24 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:02:27,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-03-20 19:02:27,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2022-03-20 19:02:27,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.025) internal successors, (123), 120 states have internal predecessors, (123), 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) [2022-03-20 19:02:27,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 127 transitions. [2022-03-20 19:02:27,723 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 127 transitions. Word has length 121 [2022-03-20 19:02:27,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:02:27,723 INFO L478 AbstractCegarLoop]: Abstraction has 125 states and 127 transitions. [2022-03-20 19:02:27,723 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.0172413793103448) internal successors, (117), 57 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) [2022-03-20 19:02:27,723 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 127 transitions. [2022-03-20 19:02:27,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-03-20 19:02:27,724 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:02:27,724 INFO L499 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:02:27,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-03-20 19:02:27,937 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 [2022-03-20 19:02:27,937 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:02:27,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:02:27,937 INFO L85 PathProgramCache]: Analyzing trace with hash 613601881, now seen corresponding path program 109 times [2022-03-20 19:02:27,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:02:27,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [217311320] [2022-03-20 19:02:28,097 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:02:28,097 INFO L85 PathProgramCache]: Analyzing trace with hash 2041640464, now seen corresponding path program 1 times [2022-03-20 19:02:28,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:02:28,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934715764] [2022-03-20 19:02:28,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:02:28,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:02:28,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:02:28,100 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:02:28,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:02:28,101 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:02:28,101 INFO L85 PathProgramCache]: Analyzing trace with hash 613601881, now seen corresponding path program 110 times [2022-03-20 19:02:28,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:02:28,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196859062] [2022-03-20 19:02:28,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:02:28,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:02:28,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:02:29,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:02:29,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:02:29,161 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 56 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:02:29,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:02:29,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196859062] [2022-03-20 19:02:29,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196859062] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:02:29,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745673171] [2022-03-20 19:02:29,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:02:29,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:02:29,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:02:29,163 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) [2022-03-20 19:02:29,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-20 19:02:29,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:02:29,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:02:29,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-20 19:02:29,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:02:29,362 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 56 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:02:29,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:02:31,379 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 56 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:02:31,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745673171] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:02:31,380 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:02:31,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 58, 58] total 116 [2022-03-20 19:02:31,380 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:02:31,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [217311320] [2022-03-20 19:02:31,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [217311320] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:02:31,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:02:31,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-03-20 19:02:31,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73486139] [2022-03-20 19:02:31,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:02:31,380 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-03-20 19:02:31,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:02:31,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-03-20 19:02:31,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=6783, Unknown=0, NotChecked=0, Total=13340 [2022-03-20 19:02:31,382 INFO L87 Difference]: Start difference. First operand 125 states and 127 transitions. Second operand has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 58 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) [2022-03-20 19:02:32,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:02:32,185 INFO L93 Difference]: Finished difference Result 134 states and 138 transitions. [2022-03-20 19:02:32,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-20 19:02:32,185 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 58 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 [2022-03-20 19:02:32,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:02:32,186 INFO L225 Difference]: With dead ends: 134 [2022-03-20 19:02:32,186 INFO L226 Difference]: Without dead ends: 127 [2022-03-20 19:02:32,188 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1869 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=12998, Invalid=16414, Unknown=0, NotChecked=0, Total=29412 [2022-03-20 19:02:32,189 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 64 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:02:32,189 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 19 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:02:32,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-03-20 19:02:32,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2022-03-20 19:02:32,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.0245901639344261) internal successors, (125), 122 states have internal predecessors, (125), 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) [2022-03-20 19:02:32,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 129 transitions. [2022-03-20 19:02:32,194 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 129 transitions. Word has length 123 [2022-03-20 19:02:32,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:02:32,195 INFO L478 AbstractCegarLoop]: Abstraction has 127 states and 129 transitions. [2022-03-20 19:02:32,195 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 58 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) [2022-03-20 19:02:32,195 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 129 transitions. [2022-03-20 19:02:32,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-03-20 19:02:32,195 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:02:32,195 INFO L499 BasicCegarLoop]: trace histogram [57, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:02:32,211 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-03-20 19:02:32,411 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 [2022-03-20 19:02:32,411 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:02:32,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:02:32,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1121694794, now seen corresponding path program 111 times [2022-03-20 19:02:32,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:02:32,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1638342341] [2022-03-20 19:02:32,615 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:02:32,615 INFO L85 PathProgramCache]: Analyzing trace with hash 2100745808, now seen corresponding path program 1 times [2022-03-20 19:02:32,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:02:32,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255138898] [2022-03-20 19:02:32,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:02:32,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:02:32,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:02:32,617 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:02:32,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:02:32,620 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:02:32,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1121694794, now seen corresponding path program 112 times [2022-03-20 19:02:32,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:02:32,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947824326] [2022-03-20 19:02:32,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:02:32,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:02:32,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:02:33,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:02:33,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:02:33,523 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 57 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:02:33,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:02:33,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947824326] [2022-03-20 19:02:33,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947824326] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:02:33,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393729362] [2022-03-20 19:02:33,524 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:02:33,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:02:33,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:02:33,526 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) [2022-03-20 19:02:33,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-20 19:02:33,570 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:02:33,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:02:33,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-20 19:02:33,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:02:33,688 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 57 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:02:33,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:02:35,548 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 57 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:02:35,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393729362] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:02:35,548 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:02:35,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 59, 59] total 118 [2022-03-20 19:02:35,548 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:02:35,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1638342341] [2022-03-20 19:02:35,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1638342341] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:02:35,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:02:35,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-03-20 19:02:35,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073838478] [2022-03-20 19:02:35,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:02:35,549 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-03-20 19:02:35,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:02:35,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-03-20 19:02:35,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6788, Invalid=7018, Unknown=0, NotChecked=0, Total=13806 [2022-03-20 19:02:35,550 INFO L87 Difference]: Start difference. First operand 127 states and 129 transitions. Second operand has 60 states, 60 states have (on average 2.0166666666666666) internal successors, (121), 59 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) [2022-03-20 19:02:36,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:02:36,409 INFO L93 Difference]: Finished difference Result 136 states and 140 transitions. [2022-03-20 19:02:36,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-20 19:02:36,409 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.0166666666666666) internal successors, (121), 59 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 [2022-03-20 19:02:36,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:02:36,410 INFO L225 Difference]: With dead ends: 136 [2022-03-20 19:02:36,410 INFO L226 Difference]: Without dead ends: 129 [2022-03-20 19:02:36,411 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1931 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=13458, Invalid=16992, Unknown=0, NotChecked=0, Total=30450 [2022-03-20 19:02:36,412 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 65 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:02:36,412 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 34 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:02:36,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-03-20 19:02:36,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2022-03-20 19:02:36,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.0241935483870968) internal successors, (127), 124 states have internal predecessors, (127), 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) [2022-03-20 19:02:36,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 131 transitions. [2022-03-20 19:02:36,417 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 131 transitions. Word has length 125 [2022-03-20 19:02:36,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:02:36,417 INFO L478 AbstractCegarLoop]: Abstraction has 129 states and 131 transitions. [2022-03-20 19:02:36,417 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.0166666666666666) internal successors, (121), 59 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) [2022-03-20 19:02:36,417 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 131 transitions. [2022-03-20 19:02:36,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-20 19:02:36,418 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:02:36,418 INFO L499 BasicCegarLoop]: trace histogram [58, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:02:36,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-03-20 19:02:36,634 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 [2022-03-20 19:02:36,634 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:02:36,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:02:36,635 INFO L85 PathProgramCache]: Analyzing trace with hash 2000478675, now seen corresponding path program 113 times [2022-03-20 19:02:36,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:02:36,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [536675496] [2022-03-20 19:02:36,743 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:02:36,743 INFO L85 PathProgramCache]: Analyzing trace with hash -2135116144, now seen corresponding path program 1 times [2022-03-20 19:02:36,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:02:36,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125567173] [2022-03-20 19:02:36,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:02:36,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:02:36,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:02:36,746 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:02:36,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:02:36,748 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:02:36,748 INFO L85 PathProgramCache]: Analyzing trace with hash 2000478675, now seen corresponding path program 114 times [2022-03-20 19:02:36,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:02:36,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610201691] [2022-03-20 19:02:36,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:02:36,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:02:36,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:02:37,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:02:37,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:02:37,435 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 58 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:02:37,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:02:37,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610201691] [2022-03-20 19:02:37,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610201691] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:02:37,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040583083] [2022-03-20 19:02:37,435 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 19:02:37,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:02:37,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:02:37,436 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) [2022-03-20 19:02:37,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-20 19:02:37,462 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 19:02:37,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:02:37,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 19:02:37,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:02:37,570 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 171 proven. 1 refuted. 0 times theorem prover too weak. 3192 trivial. 0 not checked. [2022-03-20 19:02:37,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:02:37,676 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 171 proven. 1 refuted. 0 times theorem prover too weak. 3192 trivial. 0 not checked. [2022-03-20 19:02:37,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040583083] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:02:37,677 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:02:37,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 4, 4] total 65 [2022-03-20 19:02:37,677 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:02:37,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [536675496] [2022-03-20 19:02:37,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [536675496] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:02:37,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:02:37,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-03-20 19:02:37,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858350220] [2022-03-20 19:02:37,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:02:37,677 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-03-20 19:02:37,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:02:37,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-03-20 19:02:37,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2022-03-20 19:02:37,678 INFO L87 Difference]: Start difference. First operand 129 states and 131 transitions. Second operand has 61 states, 61 states have (on average 2.0163934426229506) internal successors, (123), 60 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) [2022-03-20 19:02:38,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:02:38,538 INFO L93 Difference]: Finished difference Result 138 states and 142 transitions. [2022-03-20 19:02:38,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-20 19:02:38,539 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.0163934426229506) internal successors, (123), 60 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 [2022-03-20 19:02:38,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:02:38,539 INFO L225 Difference]: With dead ends: 138 [2022-03-20 19:02:38,539 INFO L226 Difference]: Without dead ends: 131 [2022-03-20 19:02:38,540 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=5788, Invalid=9218, Unknown=0, NotChecked=0, Total=15006 [2022-03-20 19:02:38,541 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 66 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:02:38,541 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 34 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:02:38,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-03-20 19:02:38,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2022-03-20 19:02:38,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.0238095238095237) internal successors, (129), 126 states have internal predecessors, (129), 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) [2022-03-20 19:02:38,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 133 transitions. [2022-03-20 19:02:38,545 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 133 transitions. Word has length 127 [2022-03-20 19:02:38,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:02:38,545 INFO L478 AbstractCegarLoop]: Abstraction has 131 states and 133 transitions. [2022-03-20 19:02:38,545 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.0163934426229506) internal successors, (123), 60 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) [2022-03-20 19:02:38,545 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 133 transitions. [2022-03-20 19:02:38,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-03-20 19:02:38,545 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:02:38,546 INFO L499 BasicCegarLoop]: trace histogram [59, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:02:38,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-03-20 19:02:38,754 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 [2022-03-20 19:02:38,754 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:02:38,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:02:38,754 INFO L85 PathProgramCache]: Analyzing trace with hash 227042480, now seen corresponding path program 115 times [2022-03-20 19:02:38,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:02:38,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1873429394] [2022-03-20 19:02:38,971 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:02:38,972 INFO L85 PathProgramCache]: Analyzing trace with hash -2076010800, now seen corresponding path program 1 times [2022-03-20 19:02:38,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:02:38,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182807981] [2022-03-20 19:02:38,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:02:38,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:02:38,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:02:38,974 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:02:38,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:02:38,976 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:02:38,976 INFO L85 PathProgramCache]: Analyzing trace with hash 227042480, now seen corresponding path program 116 times [2022-03-20 19:02:38,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:02:38,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082692494] [2022-03-20 19:02:38,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:02:38,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:02:38,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:02:39,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:02:39,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:02:39,689 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 59 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:02:39,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:02:39,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082692494] [2022-03-20 19:02:39,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082692494] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:02:39,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219222190] [2022-03-20 19:02:39,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:02:39,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:02:39,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:02:39,691 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) [2022-03-20 19:02:39,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-20 19:02:39,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:02:39,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:02:39,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 60 conjunts are in the unsatisfiable core [2022-03-20 19:02:39,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:02:39,929 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 59 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:02:39,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:02:42,038 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 59 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:02:42,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219222190] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:02:42,038 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:02:42,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 61, 61] total 122 [2022-03-20 19:02:42,038 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:02:42,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1873429394] [2022-03-20 19:02:42,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1873429394] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:02:42,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:02:42,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-03-20 19:02:42,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187481929] [2022-03-20 19:02:42,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:02:42,039 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-03-20 19:02:42,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:02:42,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-03-20 19:02:42,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7262, Invalid=7500, Unknown=0, NotChecked=0, Total=14762 [2022-03-20 19:02:42,040 INFO L87 Difference]: Start difference. First operand 131 states and 133 transitions. Second operand has 62 states, 62 states have (on average 2.0161290322580645) internal successors, (125), 61 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) [2022-03-20 19:02:43,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:02:43,038 INFO L93 Difference]: Finished difference Result 140 states and 144 transitions. [2022-03-20 19:02:43,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-20 19:02:43,038 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.0161290322580645) internal successors, (125), 61 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 [2022-03-20 19:02:43,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:02:43,039 INFO L225 Difference]: With dead ends: 140 [2022-03-20 19:02:43,039 INFO L226 Difference]: Without dead ends: 133 [2022-03-20 19:02:43,040 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2058 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=14402, Invalid=18178, Unknown=0, NotChecked=0, Total=32580 [2022-03-20 19:02:43,040 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 67 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:02:43,040 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 39 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:02:43,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-03-20 19:02:43,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2022-03-20 19:02:43,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.0234375) internal successors, (131), 128 states have internal predecessors, (131), 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) [2022-03-20 19:02:43,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 135 transitions. [2022-03-20 19:02:43,049 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 135 transitions. Word has length 129 [2022-03-20 19:02:43,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:02:43,050 INFO L478 AbstractCegarLoop]: Abstraction has 133 states and 135 transitions. [2022-03-20 19:02:43,050 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.0161290322580645) internal successors, (125), 61 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) [2022-03-20 19:02:43,050 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 135 transitions. [2022-03-20 19:02:43,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-03-20 19:02:43,050 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:02:43,050 INFO L499 BasicCegarLoop]: trace histogram [60, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:02:43,066 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-03-20 19:02:43,251 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 [2022-03-20 19:02:43,251 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:02:43,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:02:43,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1056875597, now seen corresponding path program 117 times [2022-03-20 19:02:43,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:02:43,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1059946510] [2022-03-20 19:02:43,394 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:02:43,394 INFO L85 PathProgramCache]: Analyzing trace with hash -2016905456, now seen corresponding path program 1 times [2022-03-20 19:02:43,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:02:43,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664652849] [2022-03-20 19:02:43,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:02:43,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:02:43,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:02:43,396 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:02:43,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:02:43,398 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:02:43,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1056875597, now seen corresponding path program 118 times [2022-03-20 19:02:43,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:02:43,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344345902] [2022-03-20 19:02:43,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:02:43,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:02:43,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:02:44,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:02:44,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:02:44,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 60 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:02:44,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:02:44,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344345902] [2022-03-20 19:02:44,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344345902] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:02:44,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228737037] [2022-03-20 19:02:44,201 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:02:44,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:02:44,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:02:44,202 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) [2022-03-20 19:02:44,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-20 19:02:44,246 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:02:44,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:02:44,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-20 19:02:44,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:02:44,372 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 60 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:02:44,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:02:46,348 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 60 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:02:46,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228737037] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:02:46,349 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:02:46,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 62, 62] total 124 [2022-03-20 19:02:46,349 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:02:46,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1059946510] [2022-03-20 19:02:46,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1059946510] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:02:46,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:02:46,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-03-20 19:02:46,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964536823] [2022-03-20 19:02:46,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:02:46,350 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-03-20 19:02:46,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:02:46,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-03-20 19:02:46,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7505, Invalid=7747, Unknown=0, NotChecked=0, Total=15252 [2022-03-20 19:02:46,351 INFO L87 Difference]: Start difference. First operand 133 states and 135 transitions. Second operand has 63 states, 63 states have (on average 2.015873015873016) internal successors, (127), 62 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) [2022-03-20 19:02:47,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:02:47,299 INFO L93 Difference]: Finished difference Result 142 states and 146 transitions. [2022-03-20 19:02:47,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-20 19:02:47,300 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.015873015873016) internal successors, (127), 62 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 [2022-03-20 19:02:47,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:02:47,301 INFO L225 Difference]: With dead ends: 142 [2022-03-20 19:02:47,301 INFO L226 Difference]: Without dead ends: 135 [2022-03-20 19:02:47,302 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2123 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=14886, Invalid=18786, Unknown=0, NotChecked=0, Total=33672 [2022-03-20 19:02:47,302 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 68 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:02:47,302 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 39 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:02:47,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-03-20 19:02:47,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2022-03-20 19:02:47,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.023076923076923) internal successors, (133), 130 states have internal predecessors, (133), 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) [2022-03-20 19:02:47,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 137 transitions. [2022-03-20 19:02:47,319 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 137 transitions. Word has length 131 [2022-03-20 19:02:47,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:02:47,320 INFO L478 AbstractCegarLoop]: Abstraction has 135 states and 137 transitions. [2022-03-20 19:02:47,320 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.015873015873016) internal successors, (127), 62 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) [2022-03-20 19:02:47,320 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 137 transitions. [2022-03-20 19:02:47,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-03-20 19:02:47,320 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:02:47,320 INFO L499 BasicCegarLoop]: trace histogram [61, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:02:47,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-03-20 19:02:47,537 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 [2022-03-20 19:02:47,537 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:02:47,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:02:47,537 INFO L85 PathProgramCache]: Analyzing trace with hash -337416022, now seen corresponding path program 119 times [2022-03-20 19:02:47,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:02:47,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1622967721] [2022-03-20 19:02:47,653 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:02:47,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1957800112, now seen corresponding path program 1 times [2022-03-20 19:02:47,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:02:47,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060523377] [2022-03-20 19:02:47,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:02:47,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:02:47,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:02:47,661 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:02:47,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:02:47,663 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:02:47,663 INFO L85 PathProgramCache]: Analyzing trace with hash -337416022, now seen corresponding path program 120 times [2022-03-20 19:02:47,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:02:47,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146800995] [2022-03-20 19:02:47,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:02:47,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:02:47,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:02:48,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:02:48,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:02:48,440 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 61 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:02:48,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:02:48,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146800995] [2022-03-20 19:02:48,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146800995] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:02:48,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188280283] [2022-03-20 19:02:48,441 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 19:02:48,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:02:48,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:02:48,449 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) [2022-03-20 19:02:48,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-20 19:02:48,475 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 19:02:48,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:02:48,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 19:02:48,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:02:48,594 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 180 proven. 1 refuted. 0 times theorem prover too weak. 3540 trivial. 0 not checked. [2022-03-20 19:02:48,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:02:48,695 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 180 proven. 1 refuted. 0 times theorem prover too weak. 3540 trivial. 0 not checked. [2022-03-20 19:02:48,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188280283] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:02:48,695 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:02:48,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 4, 4] total 68 [2022-03-20 19:02:48,696 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:02:48,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1622967721] [2022-03-20 19:02:48,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1622967721] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:02:48,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:02:48,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-03-20 19:02:48,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913987786] [2022-03-20 19:02:48,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:02:48,696 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-03-20 19:02:48,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:02:48,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-03-20 19:02:48,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2022-03-20 19:02:48,697 INFO L87 Difference]: Start difference. First operand 135 states and 137 transitions. Second operand has 64 states, 64 states have (on average 2.015625) internal successors, (129), 63 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) [2022-03-20 19:02:49,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:02:49,633 INFO L93 Difference]: Finished difference Result 144 states and 148 transitions. [2022-03-20 19:02:49,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-20 19:02:49,633 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.015625) internal successors, (129), 63 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 [2022-03-20 19:02:49,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:02:49,634 INFO L225 Difference]: With dead ends: 144 [2022-03-20 19:02:49,634 INFO L226 Difference]: Without dead ends: 137 [2022-03-20 19:02:49,634 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1890 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=6361, Invalid=10151, Unknown=0, NotChecked=0, Total=16512 [2022-03-20 19:02:49,635 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 69 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:02:49,636 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 39 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:02:49,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-03-20 19:02:49,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2022-03-20 19:02:49,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.0227272727272727) internal successors, (135), 132 states have internal predecessors, (135), 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) [2022-03-20 19:02:49,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 139 transitions. [2022-03-20 19:02:49,651 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 139 transitions. Word has length 133 [2022-03-20 19:02:49,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:02:49,651 INFO L478 AbstractCegarLoop]: Abstraction has 137 states and 139 transitions. [2022-03-20 19:02:49,651 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.015625) internal successors, (129), 63 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) [2022-03-20 19:02:49,651 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 139 transitions. [2022-03-20 19:02:49,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-20 19:02:49,652 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:02:49,652 INFO L499 BasicCegarLoop]: trace histogram [62, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:02:49,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-03-20 19:02:49,868 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 [2022-03-20 19:02:49,869 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:02:49,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:02:49,869 INFO L85 PathProgramCache]: Analyzing trace with hash -221865529, now seen corresponding path program 121 times [2022-03-20 19:02:49,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:02:49,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [118816971] [2022-03-20 19:02:49,980 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:02:49,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1898694768, now seen corresponding path program 1 times [2022-03-20 19:02:49,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:02:49,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170514724] [2022-03-20 19:02:49,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:02:49,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:02:49,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:02:49,996 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:02:49,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:02:49,998 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:02:49,998 INFO L85 PathProgramCache]: Analyzing trace with hash -221865529, now seen corresponding path program 122 times [2022-03-20 19:02:49,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:02:49,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382377970] [2022-03-20 19:02:49,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:02:49,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:02:50,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:02:50,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:02:50,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:02:50,755 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 62 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:02:50,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:02:50,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382377970] [2022-03-20 19:02:50,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382377970] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:02:50,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831441611] [2022-03-20 19:02:50,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:02:50,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:02:50,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:02:50,757 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) [2022-03-20 19:02:50,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-20 19:02:50,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:02:50,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:02:50,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-20 19:02:50,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:02:50,911 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 62 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:02:50,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:02:52,977 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 62 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:02:52,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831441611] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:02:52,977 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:02:52,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 64, 64] total 128 [2022-03-20 19:02:52,978 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:02:52,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [118816971] [2022-03-20 19:02:52,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [118816971] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:02:52,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:02:52,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-03-20 19:02:52,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827429825] [2022-03-20 19:02:52,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:02:52,979 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-03-20 19:02:52,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:02:52,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-03-20 19:02:52,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8003, Invalid=8253, Unknown=0, NotChecked=0, Total=16256 [2022-03-20 19:02:52,985 INFO L87 Difference]: Start difference. First operand 137 states and 139 transitions. Second operand has 65 states, 65 states have (on average 2.0153846153846153) internal successors, (131), 64 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) [2022-03-20 19:02:53,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:02:53,969 INFO L93 Difference]: Finished difference Result 146 states and 150 transitions. [2022-03-20 19:02:53,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-20 19:02:53,970 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.0153846153846153) internal successors, (131), 64 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 [2022-03-20 19:02:53,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:02:53,971 INFO L225 Difference]: With dead ends: 146 [2022-03-20 19:02:53,971 INFO L226 Difference]: Without dead ends: 139 [2022-03-20 19:02:53,973 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2256 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=15878, Invalid=20032, Unknown=0, NotChecked=0, Total=35910 [2022-03-20 19:02:53,973 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 70 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:02:53,979 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 49 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:02:53,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-03-20 19:02:53,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2022-03-20 19:02:53,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 134 states have (on average 1.0223880597014925) internal successors, (137), 134 states have internal predecessors, (137), 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) [2022-03-20 19:02:53,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 141 transitions. [2022-03-20 19:02:53,985 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 141 transitions. Word has length 135 [2022-03-20 19:02:53,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:02:53,985 INFO L478 AbstractCegarLoop]: Abstraction has 139 states and 141 transitions. [2022-03-20 19:02:53,985 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.0153846153846153) internal successors, (131), 64 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) [2022-03-20 19:02:53,985 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 141 transitions. [2022-03-20 19:02:53,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-03-20 19:02:53,986 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:02:53,986 INFO L499 BasicCegarLoop]: trace histogram [63, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:02:54,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-03-20 19:02:54,202 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 [2022-03-20 19:02:54,202 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:02:54,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:02:54,202 INFO L85 PathProgramCache]: Analyzing trace with hash -846991452, now seen corresponding path program 123 times [2022-03-20 19:02:54,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:02:54,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1376121125] [2022-03-20 19:02:54,331 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:02:54,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1839589424, now seen corresponding path program 1 times [2022-03-20 19:02:54,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:02:54,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736910153] [2022-03-20 19:02:54,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:02:54,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:02:54,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:02:54,334 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:02:54,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:02:54,335 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:02:54,335 INFO L85 PathProgramCache]: Analyzing trace with hash -846991452, now seen corresponding path program 124 times [2022-03-20 19:02:54,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:02:54,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165952126] [2022-03-20 19:02:54,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:02:54,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:02:54,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:02:55,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:02:55,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:02:55,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 63 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:02:55,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:02:55,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165952126] [2022-03-20 19:02:55,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165952126] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:02:55,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598159374] [2022-03-20 19:02:55,112 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:02:55,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:02:55,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:02:55,113 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) [2022-03-20 19:02:55,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-20 19:02:55,155 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:02:55,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:02:55,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 64 conjunts are in the unsatisfiable core [2022-03-20 19:02:55,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:02:55,281 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 63 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:02:55,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:02:58,006 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 63 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:02:58,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598159374] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:02:58,007 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:02:58,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 65, 65] total 130 [2022-03-20 19:02:58,007 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:02:58,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1376121125] [2022-03-20 19:02:58,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1376121125] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:02:58,007 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:02:58,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-03-20 19:02:58,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496356669] [2022-03-20 19:02:58,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:02:58,007 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-03-20 19:02:58,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:02:58,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-03-20 19:02:58,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8258, Invalid=8512, Unknown=0, NotChecked=0, Total=16770 [2022-03-20 19:02:58,009 INFO L87 Difference]: Start difference. First operand 139 states and 141 transitions. Second operand has 66 states, 66 states have (on average 2.015151515151515) internal successors, (133), 65 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) [2022-03-20 19:02:59,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:02:59,025 INFO L93 Difference]: Finished difference Result 148 states and 152 transitions. [2022-03-20 19:02:59,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-20 19:02:59,025 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.015151515151515) internal successors, (133), 65 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 [2022-03-20 19:02:59,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:02:59,025 INFO L225 Difference]: With dead ends: 148 [2022-03-20 19:02:59,025 INFO L226 Difference]: Without dead ends: 141 [2022-03-20 19:02:59,027 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2324 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=16386, Invalid=20670, Unknown=0, NotChecked=0, Total=37056 [2022-03-20 19:02:59,027 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 71 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:02:59,027 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 39 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:02:59,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-03-20 19:02:59,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2022-03-20 19:02:59,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 136 states have (on average 1.0220588235294117) internal successors, (139), 136 states have internal predecessors, (139), 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) [2022-03-20 19:02:59,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 143 transitions. [2022-03-20 19:02:59,031 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 143 transitions. Word has length 137 [2022-03-20 19:02:59,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:02:59,031 INFO L478 AbstractCegarLoop]: Abstraction has 141 states and 143 transitions. [2022-03-20 19:02:59,031 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.015151515151515) internal successors, (133), 65 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) [2022-03-20 19:02:59,032 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 143 transitions. [2022-03-20 19:02:59,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-03-20 19:02:59,032 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:02:59,032 INFO L499 BasicCegarLoop]: trace histogram [64, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:02:59,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-03-20 19:02:59,247 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 [2022-03-20 19:02:59,247 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:02:59,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:02:59,247 INFO L85 PathProgramCache]: Analyzing trace with hash -297582015, now seen corresponding path program 125 times [2022-03-20 19:02:59,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:02:59,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1032126721] [2022-03-20 19:02:59,436 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:02:59,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1780484080, now seen corresponding path program 1 times [2022-03-20 19:02:59,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:02:59,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034678356] [2022-03-20 19:02:59,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:02:59,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:02:59,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:02:59,439 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:02:59,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:02:59,442 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:02:59,442 INFO L85 PathProgramCache]: Analyzing trace with hash -297582015, now seen corresponding path program 126 times [2022-03-20 19:02:59,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:02:59,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495387883] [2022-03-20 19:02:59,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:02:59,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:02:59,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:03:00,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:03:00,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:03:00,745 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 64 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:03:00,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:03:00,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495387883] [2022-03-20 19:03:00,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495387883] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:03:00,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463145303] [2022-03-20 19:03:00,746 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 19:03:00,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:03:00,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:03:00,747 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) [2022-03-20 19:03:00,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-20 19:03:00,779 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 19:03:00,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:03:00,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 19:03:00,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:03:01,018 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 189 proven. 1 refuted. 0 times theorem prover too weak. 3906 trivial. 0 not checked. [2022-03-20 19:03:01,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:03:01,211 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 189 proven. 1 refuted. 0 times theorem prover too weak. 3906 trivial. 0 not checked. [2022-03-20 19:03:01,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463145303] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:03:01,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:03:01,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 4, 4] total 71 [2022-03-20 19:03:01,212 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:03:01,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1032126721] [2022-03-20 19:03:01,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1032126721] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:03:01,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:03:01,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-03-20 19:03:01,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635325211] [2022-03-20 19:03:01,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:03:01,212 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-03-20 19:03:01,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:03:01,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-03-20 19:03:01,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2022-03-20 19:03:01,213 INFO L87 Difference]: Start difference. First operand 141 states and 143 transitions. Second operand has 67 states, 67 states have (on average 2.014925373134328) internal successors, (135), 66 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) [2022-03-20 19:03:02,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:03:02,881 INFO L93 Difference]: Finished difference Result 150 states and 154 transitions. [2022-03-20 19:03:02,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-20 19:03:02,881 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.014925373134328) internal successors, (135), 66 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 [2022-03-20 19:03:02,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:03:02,882 INFO L225 Difference]: With dead ends: 150 [2022-03-20 19:03:02,882 INFO L226 Difference]: Without dead ends: 143 [2022-03-20 19:03:02,883 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2079 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=6961, Invalid=11129, Unknown=0, NotChecked=0, Total=18090 [2022-03-20 19:03:02,883 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 72 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:03:02,884 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 39 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:03:02,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-03-20 19:03:02,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2022-03-20 19:03:02,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.0217391304347827) internal successors, (141), 138 states have internal predecessors, (141), 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) [2022-03-20 19:03:02,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 145 transitions. [2022-03-20 19:03:02,888 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 145 transitions. Word has length 139 [2022-03-20 19:03:02,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:03:02,888 INFO L478 AbstractCegarLoop]: Abstraction has 143 states and 145 transitions. [2022-03-20 19:03:02,888 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.014925373134328) internal successors, (135), 66 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) [2022-03-20 19:03:02,888 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 145 transitions. [2022-03-20 19:03:02,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-03-20 19:03:02,888 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:03:02,889 INFO L499 BasicCegarLoop]: trace histogram [65, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:03:02,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-03-20 19:03:03,105 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 [2022-03-20 19:03:03,105 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:03:03,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:03:03,105 INFO L85 PathProgramCache]: Analyzing trace with hash -596090466, now seen corresponding path program 127 times [2022-03-20 19:03:03,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:03:03,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [34340547] [2022-03-20 19:03:03,314 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:03:03,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1721378736, now seen corresponding path program 1 times [2022-03-20 19:03:03,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:03:03,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133795621] [2022-03-20 19:03:03,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:03:03,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:03:03,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:03:03,316 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:03:03,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:03:03,318 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:03:03,318 INFO L85 PathProgramCache]: Analyzing trace with hash -596090466, now seen corresponding path program 128 times [2022-03-20 19:03:03,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:03:03,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102093747] [2022-03-20 19:03:03,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:03:03,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:03:03,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:03:04,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:03:04,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:03:04,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 65 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:03:04,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:03:04,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102093747] [2022-03-20 19:03:04,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102093747] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:03:04,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807497591] [2022-03-20 19:03:04,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:03:04,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:03:04,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:03:04,667 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) [2022-03-20 19:03:04,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-20 19:03:04,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:03:04,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:03:04,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 66 conjunts are in the unsatisfiable core [2022-03-20 19:03:04,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:03:04,960 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 65 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:03:04,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:03:07,677 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 65 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:03:07,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807497591] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:03:07,678 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:03:07,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 67, 67] total 134 [2022-03-20 19:03:07,678 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:03:07,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [34340547] [2022-03-20 19:03:07,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [34340547] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:03:07,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:03:07,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-03-20 19:03:07,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718927524] [2022-03-20 19:03:07,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:03:07,679 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-03-20 19:03:07,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:03:07,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-03-20 19:03:07,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8780, Invalid=9042, Unknown=0, NotChecked=0, Total=17822 [2022-03-20 19:03:07,680 INFO L87 Difference]: Start difference. First operand 143 states and 145 transitions. Second operand has 68 states, 68 states have (on average 2.014705882352941) internal successors, (137), 67 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) [2022-03-20 19:03:09,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:03:09,333 INFO L93 Difference]: Finished difference Result 152 states and 156 transitions. [2022-03-20 19:03:09,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-20 19:03:09,333 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.014705882352941) internal successors, (137), 67 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 [2022-03-20 19:03:09,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:03:09,334 INFO L225 Difference]: With dead ends: 152 [2022-03-20 19:03:09,334 INFO L226 Difference]: Without dead ends: 145 [2022-03-20 19:03:09,335 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2463 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=17426, Invalid=21976, Unknown=0, NotChecked=0, Total=39402 [2022-03-20 19:03:09,335 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 73 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:03:09,335 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 44 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:03:09,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-03-20 19:03:09,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2022-03-20 19:03:09,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.0214285714285714) internal successors, (143), 140 states have internal predecessors, (143), 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) [2022-03-20 19:03:09,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 147 transitions. [2022-03-20 19:03:09,340 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 147 transitions. Word has length 141 [2022-03-20 19:03:09,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:03:09,340 INFO L478 AbstractCegarLoop]: Abstraction has 145 states and 147 transitions. [2022-03-20 19:03:09,340 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.014705882352941) internal successors, (137), 67 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) [2022-03-20 19:03:09,340 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 147 transitions. [2022-03-20 19:03:09,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-20 19:03:09,341 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:03:09,341 INFO L499 BasicCegarLoop]: trace histogram [66, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:03:09,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-03-20 19:03:09,557 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 [2022-03-20 19:03:09,557 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:03:09,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:03:09,557 INFO L85 PathProgramCache]: Analyzing trace with hash 300096955, now seen corresponding path program 129 times [2022-03-20 19:03:09,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:03:09,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [572104808] [2022-03-20 19:03:09,721 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:03:09,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1662273392, now seen corresponding path program 1 times [2022-03-20 19:03:09,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:03:09,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473569043] [2022-03-20 19:03:09,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:03:09,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:03:09,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:03:09,724 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:03:09,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:03:09,733 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:03:09,733 INFO L85 PathProgramCache]: Analyzing trace with hash 300096955, now seen corresponding path program 130 times [2022-03-20 19:03:09,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:03:09,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205022877] [2022-03-20 19:03:09,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:03:09,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:03:09,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:03:10,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:03:10,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:03:10,972 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 66 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:03:10,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:03:10,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205022877] [2022-03-20 19:03:10,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205022877] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:03:10,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115993285] [2022-03-20 19:03:10,972 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:03:10,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:03:10,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:03:10,974 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) [2022-03-20 19:03:10,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-20 19:03:11,027 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:03:11,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:03:11,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-20 19:03:11,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:03:11,242 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 66 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:03:11,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:03:13,662 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 66 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:03:13,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115993285] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:03:13,662 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:03:13,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 68, 68] total 136 [2022-03-20 19:03:13,663 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:03:13,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [572104808] [2022-03-20 19:03:13,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [572104808] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:03:13,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:03:13,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-03-20 19:03:13,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900843655] [2022-03-20 19:03:13,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:03:13,663 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-03-20 19:03:13,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:03:13,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-03-20 19:03:13,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9047, Invalid=9313, Unknown=0, NotChecked=0, Total=18360 [2022-03-20 19:03:13,665 INFO L87 Difference]: Start difference. First operand 145 states and 147 transitions. Second operand has 69 states, 69 states have (on average 2.0144927536231885) internal successors, (139), 68 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) [2022-03-20 19:03:14,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:03:14,740 INFO L93 Difference]: Finished difference Result 154 states and 158 transitions. [2022-03-20 19:03:14,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-20 19:03:14,741 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.0144927536231885) internal successors, (139), 68 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 [2022-03-20 19:03:14,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:03:14,741 INFO L225 Difference]: With dead ends: 154 [2022-03-20 19:03:14,741 INFO L226 Difference]: Without dead ends: 147 [2022-03-20 19:03:14,744 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2534 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=17958, Invalid=22644, Unknown=0, NotChecked=0, Total=40602 [2022-03-20 19:03:14,748 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 74 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:03:14,749 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 49 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:03:14,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-03-20 19:03:14,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2022-03-20 19:03:14,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.0211267605633803) internal successors, (145), 142 states have internal predecessors, (145), 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) [2022-03-20 19:03:14,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 149 transitions. [2022-03-20 19:03:14,753 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 149 transitions. Word has length 143 [2022-03-20 19:03:14,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:03:14,753 INFO L478 AbstractCegarLoop]: Abstraction has 147 states and 149 transitions. [2022-03-20 19:03:14,753 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.0144927536231885) internal successors, (139), 68 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) [2022-03-20 19:03:14,753 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 149 transitions. [2022-03-20 19:03:14,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-03-20 19:03:14,754 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:03:14,754 INFO L499 BasicCegarLoop]: trace histogram [67, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:03:14,770 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-03-20 19:03:14,962 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 [2022-03-20 19:03:14,962 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:03:14,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:03:14,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1752217960, now seen corresponding path program 131 times [2022-03-20 19:03:14,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:03:14,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [836634262] [2022-03-20 19:03:15,089 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:03:15,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1603168048, now seen corresponding path program 1 times [2022-03-20 19:03:15,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:03:15,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992190450] [2022-03-20 19:03:15,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:03:15,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:03:15,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:03:15,091 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:03:15,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:03:15,093 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:03:15,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1752217960, now seen corresponding path program 132 times [2022-03-20 19:03:15,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:03:15,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621417565] [2022-03-20 19:03:15,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:03:15,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:03:15,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:03:16,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:03:16,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:03:16,219 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 67 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:03:16,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:03:16,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621417565] [2022-03-20 19:03:16,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621417565] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:03:16,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082934674] [2022-03-20 19:03:16,219 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 19:03:16,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:03:16,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:03:16,220 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) [2022-03-20 19:03:16,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-20 19:03:16,253 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 19:03:16,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:03:16,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 19:03:16,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:03:16,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 198 proven. 1 refuted. 0 times theorem prover too weak. 4290 trivial. 0 not checked. [2022-03-20 19:03:16,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:03:16,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 198 proven. 1 refuted. 0 times theorem prover too weak. 4290 trivial. 0 not checked. [2022-03-20 19:03:16,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082934674] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:03:16,603 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:03:16,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 4, 4] total 74 [2022-03-20 19:03:16,603 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:03:16,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [836634262] [2022-03-20 19:03:16,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [836634262] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:03:16,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:03:16,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-03-20 19:03:16,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025660893] [2022-03-20 19:03:16,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:03:16,603 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-03-20 19:03:16,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:03:16,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-03-20 19:03:16,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2022-03-20 19:03:16,604 INFO L87 Difference]: Start difference. First operand 147 states and 149 transitions. Second operand has 70 states, 70 states have (on average 2.0142857142857142) internal successors, (141), 69 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) [2022-03-20 19:03:18,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:03:18,275 INFO L93 Difference]: Finished difference Result 156 states and 160 transitions. [2022-03-20 19:03:18,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-20 19:03:18,276 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.0142857142857142) internal successors, (141), 69 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 [2022-03-20 19:03:18,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:03:18,276 INFO L225 Difference]: With dead ends: 156 [2022-03-20 19:03:18,276 INFO L226 Difference]: Without dead ends: 149 [2022-03-20 19:03:18,277 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2277 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=7588, Invalid=12152, Unknown=0, NotChecked=0, Total=19740 [2022-03-20 19:03:18,277 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 75 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:03:18,278 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 59 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:03:18,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-03-20 19:03:18,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2022-03-20 19:03:18,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 144 states have (on average 1.0208333333333333) internal successors, (147), 144 states have internal predecessors, (147), 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) [2022-03-20 19:03:18,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 151 transitions. [2022-03-20 19:03:18,282 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 151 transitions. Word has length 145 [2022-03-20 19:03:18,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:03:18,282 INFO L478 AbstractCegarLoop]: Abstraction has 149 states and 151 transitions. [2022-03-20 19:03:18,282 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.0142857142857142) internal successors, (141), 69 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) [2022-03-20 19:03:18,282 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 151 transitions. [2022-03-20 19:03:18,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-03-20 19:03:18,283 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:03:18,283 INFO L499 BasicCegarLoop]: trace histogram [68, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:03:18,307 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-03-20 19:03:18,483 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 [2022-03-20 19:03:18,483 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:03:18,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:03:18,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1658104885, now seen corresponding path program 133 times [2022-03-20 19:03:18,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:03:18,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1225196971] [2022-03-20 19:03:18,647 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:03:18,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1544062704, now seen corresponding path program 1 times [2022-03-20 19:03:18,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:03:18,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526762143] [2022-03-20 19:03:18,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:03:18,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:03:18,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:03:18,650 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:03:18,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:03:18,651 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:03:18,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1658104885, now seen corresponding path program 134 times [2022-03-20 19:03:18,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:03:18,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961680961] [2022-03-20 19:03:18,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:03:18,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:03:18,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:03:19,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:03:19,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:03:19,964 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 68 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:03:19,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:03:19,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961680961] [2022-03-20 19:03:19,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961680961] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:03:19,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832348457] [2022-03-20 19:03:19,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:03:19,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:03:19,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:03:19,966 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) [2022-03-20 19:03:19,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-20 19:03:20,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:03:20,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:03:20,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 69 conjunts are in the unsatisfiable core [2022-03-20 19:03:20,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:03:20,206 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 68 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:03:20,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:03:24,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 68 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:03:24,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832348457] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:03:24,083 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:03:24,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70, 70] total 140 [2022-03-20 19:03:24,083 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:03:24,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1225196971] [2022-03-20 19:03:24,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1225196971] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:03:24,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:03:24,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-03-20 19:03:24,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584343721] [2022-03-20 19:03:24,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:03:24,084 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-03-20 19:03:24,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:03:24,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-03-20 19:03:24,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9593, Invalid=9867, Unknown=0, NotChecked=0, Total=19460 [2022-03-20 19:03:24,086 INFO L87 Difference]: Start difference. First operand 149 states and 151 transitions. Second operand has 71 states, 71 states have (on average 2.0140845070422535) internal successors, (143), 70 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) [2022-03-20 19:03:25,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:03:25,729 INFO L93 Difference]: Finished difference Result 158 states and 162 transitions. [2022-03-20 19:03:25,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-20 19:03:25,729 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.0140845070422535) internal successors, (143), 70 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 [2022-03-20 19:03:25,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:03:25,730 INFO L225 Difference]: With dead ends: 158 [2022-03-20 19:03:25,730 INFO L226 Difference]: Without dead ends: 151 [2022-03-20 19:03:25,731 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2679 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=19046, Invalid=24010, Unknown=0, NotChecked=0, Total=43056 [2022-03-20 19:03:25,735 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 76 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:03:25,736 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 54 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:03:25,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-03-20 19:03:25,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2022-03-20 19:03:25,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.0205479452054795) internal successors, (149), 146 states have internal predecessors, (149), 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) [2022-03-20 19:03:25,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 153 transitions. [2022-03-20 19:03:25,755 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 153 transitions. Word has length 147 [2022-03-20 19:03:25,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:03:25,755 INFO L478 AbstractCegarLoop]: Abstraction has 151 states and 153 transitions. [2022-03-20 19:03:25,755 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.0140845070422535) internal successors, (143), 70 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) [2022-03-20 19:03:25,756 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 153 transitions. [2022-03-20 19:03:25,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-03-20 19:03:25,756 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:03:25,756 INFO L499 BasicCegarLoop]: trace histogram [69, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:03:25,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-03-20 19:03:25,973 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 [2022-03-20 19:03:25,973 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:03:25,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:03:25,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1918312082, now seen corresponding path program 135 times [2022-03-20 19:03:25,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:03:25,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [261356660] [2022-03-20 19:03:26,166 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:03:26,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1484957360, now seen corresponding path program 1 times [2022-03-20 19:03:26,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:03:26,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333025926] [2022-03-20 19:03:26,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:03:26,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:03:26,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:03:26,169 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:03:26,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:03:26,170 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:03:26,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1918312082, now seen corresponding path program 136 times [2022-03-20 19:03:26,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:03:26,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414630433] [2022-03-20 19:03:26,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:03:26,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:03:26,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:03:27,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:03:27,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:03:27,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 69 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:03:27,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:03:27,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414630433] [2022-03-20 19:03:27,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414630433] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:03:27,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962245036] [2022-03-20 19:03:27,068 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:03:27,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:03:27,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:03:27,069 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) [2022-03-20 19:03:27,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-20 19:03:27,115 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:03:27,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:03:27,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 70 conjunts are in the unsatisfiable core [2022-03-20 19:03:27,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:03:27,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 69 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:03:27,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:03:30,106 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 69 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:03:30,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962245036] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:03:30,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:03:30,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 71, 71] total 142 [2022-03-20 19:03:30,107 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:03:30,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [261356660] [2022-03-20 19:03:30,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [261356660] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:03:30,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:03:30,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-03-20 19:03:30,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818162938] [2022-03-20 19:03:30,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:03:30,108 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-03-20 19:03:30,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:03:30,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-03-20 19:03:30,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9872, Invalid=10150, Unknown=0, NotChecked=0, Total=20022 [2022-03-20 19:03:30,109 INFO L87 Difference]: Start difference. First operand 151 states and 153 transitions. Second operand has 72 states, 72 states have (on average 2.013888888888889) internal successors, (145), 71 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) [2022-03-20 19:03:31,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:03:31,300 INFO L93 Difference]: Finished difference Result 160 states and 164 transitions. [2022-03-20 19:03:31,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-20 19:03:31,300 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.013888888888889) internal successors, (145), 71 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 [2022-03-20 19:03:31,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:03:31,300 INFO L225 Difference]: With dead ends: 160 [2022-03-20 19:03:31,301 INFO L226 Difference]: Without dead ends: 153 [2022-03-20 19:03:31,302 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2753 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=19602, Invalid=24708, Unknown=0, NotChecked=0, Total=44310 [2022-03-20 19:03:31,302 INFO L913 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 [2022-03-20 19:03:31,302 INFO L914 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] [2022-03-20 19:03:31,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-03-20 19:03:31,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2022-03-20 19:03:31,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 148 states have (on average 1.0202702702702702) internal successors, (151), 148 states have internal predecessors, (151), 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) [2022-03-20 19:03:31,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 155 transitions. [2022-03-20 19:03:31,307 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 155 transitions. Word has length 149 [2022-03-20 19:03:31,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:03:31,307 INFO L478 AbstractCegarLoop]: Abstraction has 153 states and 155 transitions. [2022-03-20 19:03:31,307 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.013888888888889) internal successors, (145), 71 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) [2022-03-20 19:03:31,307 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 155 transitions. [2022-03-20 19:03:31,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-03-20 19:03:31,307 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:03:31,307 INFO L499 BasicCegarLoop]: trace histogram [70, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:03:31,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-03-20 19:03:31,524 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 [2022-03-20 19:03:31,524 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:03:31,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:03:31,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1425642065, now seen corresponding path program 137 times [2022-03-20 19:03:31,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:03:31,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [685640820] [2022-03-20 19:03:31,677 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:03:31,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1425852016, now seen corresponding path program 1 times [2022-03-20 19:03:31,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:03:31,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528812910] [2022-03-20 19:03:31,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:03:31,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:03:31,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:03:31,679 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:03:31,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:03:31,681 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:03:31,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1425642065, now seen corresponding path program 138 times [2022-03-20 19:03:31,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:03:31,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155580536] [2022-03-20 19:03:31,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:03:31,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:03:31,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:03:32,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:03:32,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:03:32,598 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 70 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:03:32,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:03:32,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155580536] [2022-03-20 19:03:32,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155580536] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:03:32,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884699082] [2022-03-20 19:03:32,599 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 19:03:32,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:03:32,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:03:32,600 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) [2022-03-20 19:03:32,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-20 19:03:32,626 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 19:03:32,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:03:32,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 19:03:32,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:03:32,856 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 207 proven. 1 refuted. 0 times theorem prover too weak. 4692 trivial. 0 not checked. [2022-03-20 19:03:32,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:03:33,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 207 proven. 1 refuted. 0 times theorem prover too weak. 4692 trivial. 0 not checked. [2022-03-20 19:03:33,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884699082] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:03:33,057 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:03:33,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 4, 4] total 77 [2022-03-20 19:03:33,058 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:03:33,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [685640820] [2022-03-20 19:03:33,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [685640820] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:03:33,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:03:33,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-03-20 19:03:33,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846651381] [2022-03-20 19:03:33,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:03:33,058 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-03-20 19:03:33,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:03:33,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-03-20 19:03:33,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2022-03-20 19:03:33,059 INFO L87 Difference]: Start difference. First operand 153 states and 155 transitions. Second operand has 73 states, 73 states have (on average 2.0136986301369864) internal successors, (147), 72 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) [2022-03-20 19:03:34,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:03:34,277 INFO L93 Difference]: Finished difference Result 162 states and 166 transitions. [2022-03-20 19:03:34,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-20 19:03:34,277 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.0136986301369864) internal successors, (147), 72 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 [2022-03-20 19:03:34,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:03:34,278 INFO L225 Difference]: With dead ends: 162 [2022-03-20 19:03:34,278 INFO L226 Difference]: Without dead ends: 155 [2022-03-20 19:03:34,279 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2484 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=8242, Invalid=13220, Unknown=0, NotChecked=0, Total=21462 [2022-03-20 19:03:34,279 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 78 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:03:34,279 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 29 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:03:34,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-03-20 19:03:34,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2022-03-20 19:03:34,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.02) internal successors, (153), 150 states have internal predecessors, (153), 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) [2022-03-20 19:03:34,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 157 transitions. [2022-03-20 19:03:34,284 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 157 transitions. Word has length 151 [2022-03-20 19:03:34,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:03:34,284 INFO L478 AbstractCegarLoop]: Abstraction has 155 states and 157 transitions. [2022-03-20 19:03:34,284 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.0136986301369864) internal successors, (147), 72 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) [2022-03-20 19:03:34,284 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 157 transitions. [2022-03-20 19:03:34,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-03-20 19:03:34,285 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:03:34,285 INFO L499 BasicCegarLoop]: trace histogram [71, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:03:34,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-03-20 19:03:34,500 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 [2022-03-20 19:03:34,500 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:03:34,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:03:34,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1964927372, now seen corresponding path program 139 times [2022-03-20 19:03:34,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:03:34,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [459196298] [2022-03-20 19:03:34,639 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:03:34,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1366746672, now seen corresponding path program 1 times [2022-03-20 19:03:34,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:03:34,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104010453] [2022-03-20 19:03:34,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:03:34,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:03:34,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:03:34,642 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:03:34,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:03:34,643 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:03:34,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1964927372, now seen corresponding path program 140 times [2022-03-20 19:03:34,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:03:34,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903279352] [2022-03-20 19:03:34,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:03:34,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:03:34,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:03:35,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:03:35,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:03:35,589 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 71 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:03:35,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:03:35,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903279352] [2022-03-20 19:03:35,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903279352] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:03:35,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674433433] [2022-03-20 19:03:35,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:03:35,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:03:35,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:03:35,590 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) [2022-03-20 19:03:35,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-20 19:03:35,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:03:35,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:03:35,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 72 conjunts are in the unsatisfiable core [2022-03-20 19:03:35,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:03:35,777 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 71 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:03:35,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:03:38,550 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 71 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:03:38,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674433433] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:03:38,550 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:03:38,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 73, 73] total 146 [2022-03-20 19:03:38,550 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:03:38,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [459196298] [2022-03-20 19:03:38,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [459196298] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:03:38,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:03:38,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-03-20 19:03:38,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477533665] [2022-03-20 19:03:38,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:03:38,551 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-03-20 19:03:38,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:03:38,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-03-20 19:03:38,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10442, Invalid=10728, Unknown=0, NotChecked=0, Total=21170 [2022-03-20 19:03:38,552 INFO L87 Difference]: Start difference. First operand 155 states and 157 transitions. Second operand has 74 states, 74 states have (on average 2.0135135135135136) internal successors, (149), 73 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) [2022-03-20 19:03:39,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:03:39,850 INFO L93 Difference]: Finished difference Result 164 states and 168 transitions. [2022-03-20 19:03:39,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-20 19:03:39,851 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.0135135135135136) internal successors, (149), 73 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 [2022-03-20 19:03:39,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:03:39,851 INFO L225 Difference]: With dead ends: 164 [2022-03-20 19:03:39,851 INFO L226 Difference]: Without dead ends: 157 [2022-03-20 19:03:39,854 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2904 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=20738, Invalid=26134, Unknown=0, NotChecked=0, Total=46872 [2022-03-20 19:03:39,854 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 79 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:03:39,854 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 24 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:03:39,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-03-20 19:03:39,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2022-03-20 19:03:39,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 152 states have (on average 1.019736842105263) internal successors, (155), 152 states have internal predecessors, (155), 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) [2022-03-20 19:03:39,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 159 transitions. [2022-03-20 19:03:39,859 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 159 transitions. Word has length 153 [2022-03-20 19:03:39,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:03:39,861 INFO L478 AbstractCegarLoop]: Abstraction has 157 states and 159 transitions. [2022-03-20 19:03:39,861 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.0135135135135136) internal successors, (149), 73 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) [2022-03-20 19:03:39,861 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 159 transitions. [2022-03-20 19:03:39,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-03-20 19:03:39,861 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:03:39,861 INFO L499 BasicCegarLoop]: trace histogram [72, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:03:39,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-03-20 19:03:40,076 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 [2022-03-20 19:03:40,076 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:03:40,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:03:40,077 INFO L85 PathProgramCache]: Analyzing trace with hash 421978665, now seen corresponding path program 141 times [2022-03-20 19:03:40,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:03:40,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [267807515] [2022-03-20 19:03:40,247 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:03:40,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1307641328, now seen corresponding path program 1 times [2022-03-20 19:03:40,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:03:40,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926622459] [2022-03-20 19:03:40,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:03:40,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:03:40,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:03:40,250 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:03:40,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:03:40,253 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:03:40,253 INFO L85 PathProgramCache]: Analyzing trace with hash 421978665, now seen corresponding path program 142 times [2022-03-20 19:03:40,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:03:40,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361202286] [2022-03-20 19:03:40,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:03:40,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:03:40,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:03:41,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:03:41,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:03:41,201 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 72 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:03:41,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:03:41,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361202286] [2022-03-20 19:03:41,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361202286] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:03:41,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818058016] [2022-03-20 19:03:41,201 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:03:41,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:03:41,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:03:41,203 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) [2022-03-20 19:03:41,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-20 19:03:41,246 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:03:41,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:03:41,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 73 conjunts are in the unsatisfiable core [2022-03-20 19:03:41,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:03:41,413 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 72 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:03:41,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:03:45,796 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 72 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:03:45,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818058016] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:03:45,796 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:03:45,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 74, 74] total 148 [2022-03-20 19:03:45,796 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:03:45,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [267807515] [2022-03-20 19:03:45,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [267807515] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:03:45,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:03:45,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-03-20 19:03:45,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770286409] [2022-03-20 19:03:45,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:03:45,797 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-03-20 19:03:45,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:03:45,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-03-20 19:03:45,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10733, Invalid=11023, Unknown=0, NotChecked=0, Total=21756 [2022-03-20 19:03:45,799 INFO L87 Difference]: Start difference. First operand 157 states and 159 transitions. Second operand has 75 states, 75 states have (on average 2.013333333333333) internal successors, (151), 74 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) [2022-03-20 19:03:47,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:03:47,101 INFO L93 Difference]: Finished difference Result 166 states and 170 transitions. [2022-03-20 19:03:47,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-20 19:03:47,101 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.013333333333333) internal successors, (151), 74 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 [2022-03-20 19:03:47,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:03:47,102 INFO L225 Difference]: With dead ends: 166 [2022-03-20 19:03:47,102 INFO L226 Difference]: Without dead ends: 159 [2022-03-20 19:03:47,104 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2981 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=21318, Invalid=26862, Unknown=0, NotChecked=0, Total=48180 [2022-03-20 19:03:47,104 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 80 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:03:47,104 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 54 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:03:47,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-03-20 19:03:47,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2022-03-20 19:03:47,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.0194805194805194) internal successors, (157), 154 states have internal predecessors, (157), 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) [2022-03-20 19:03:47,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 161 transitions. [2022-03-20 19:03:47,109 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 161 transitions. Word has length 155 [2022-03-20 19:03:47,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:03:47,109 INFO L478 AbstractCegarLoop]: Abstraction has 159 states and 161 transitions. [2022-03-20 19:03:47,109 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.013333333333333) internal successors, (151), 74 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) [2022-03-20 19:03:47,109 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 161 transitions. [2022-03-20 19:03:47,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-03-20 19:03:47,110 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:03:47,110 INFO L499 BasicCegarLoop]: trace histogram [73, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:03:47,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-03-20 19:03:47,326 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 [2022-03-20 19:03:47,326 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:03:47,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:03:47,327 INFO L85 PathProgramCache]: Analyzing trace with hash -588011642, now seen corresponding path program 143 times [2022-03-20 19:03:47,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:03:47,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [854340920] [2022-03-20 19:03:47,520 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:03:47,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1248535984, now seen corresponding path program 1 times [2022-03-20 19:03:47,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:03:47,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620824923] [2022-03-20 19:03:47,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:03:47,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:03:47,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:03:47,522 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:03:47,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:03:47,524 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:03:47,524 INFO L85 PathProgramCache]: Analyzing trace with hash -588011642, now seen corresponding path program 144 times [2022-03-20 19:03:47,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:03:47,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323669642] [2022-03-20 19:03:47,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:03:47,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:03:47,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:03:49,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:03:49,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:03:49,067 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 73 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:03:49,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:03:49,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323669642] [2022-03-20 19:03:49,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323669642] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:03:49,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383792311] [2022-03-20 19:03:49,068 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 19:03:49,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:03:49,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:03:49,069 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) [2022-03-20 19:03:49,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-20 19:03:49,092 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 19:03:49,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:03:49,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 19:03:49,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:03:49,245 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 216 proven. 1 refuted. 0 times theorem prover too weak. 5112 trivial. 0 not checked. [2022-03-20 19:03:49,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:03:49,372 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 216 proven. 1 refuted. 0 times theorem prover too weak. 5112 trivial. 0 not checked. [2022-03-20 19:03:49,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383792311] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:03:49,373 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:03:49,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 4, 4] total 80 [2022-03-20 19:03:49,373 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:03:49,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [854340920] [2022-03-20 19:03:49,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [854340920] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:03:49,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:03:49,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-03-20 19:03:49,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163641158] [2022-03-20 19:03:49,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:03:49,373 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-03-20 19:03:49,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:03:49,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-03-20 19:03:49,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2022-03-20 19:03:49,375 INFO L87 Difference]: Start difference. First operand 159 states and 161 transitions. Second operand has 76 states, 76 states have (on average 2.013157894736842) internal successors, (153), 75 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) [2022-03-20 19:03:50,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:03:50,702 INFO L93 Difference]: Finished difference Result 168 states and 172 transitions. [2022-03-20 19:03:50,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-20 19:03:50,702 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.013157894736842) internal successors, (153), 75 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 [2022-03-20 19:03:50,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:03:50,703 INFO L225 Difference]: With dead ends: 168 [2022-03-20 19:03:50,703 INFO L226 Difference]: Without dead ends: 161 [2022-03-20 19:03:50,704 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 312 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2700 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=8923, Invalid=14333, Unknown=0, NotChecked=0, Total=23256 [2022-03-20 19:03:50,704 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 81 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:03:50,704 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 44 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:03:50,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-03-20 19:03:50,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2022-03-20 19:03:50,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 156 states have (on average 1.0192307692307692) internal successors, (159), 156 states have internal predecessors, (159), 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) [2022-03-20 19:03:50,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 163 transitions. [2022-03-20 19:03:50,709 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 163 transitions. Word has length 157 [2022-03-20 19:03:50,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:03:50,709 INFO L478 AbstractCegarLoop]: Abstraction has 161 states and 163 transitions. [2022-03-20 19:03:50,709 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.013157894736842) internal successors, (153), 75 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) [2022-03-20 19:03:50,709 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 163 transitions. [2022-03-20 19:03:50,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-03-20 19:03:50,709 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:03:50,709 INFO L499 BasicCegarLoop]: trace histogram [74, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:03:50,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-03-20 19:03:50,922 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 [2022-03-20 19:03:50,922 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:03:50,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:03:50,923 INFO L85 PathProgramCache]: Analyzing trace with hash -526087773, now seen corresponding path program 145 times [2022-03-20 19:03:50,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:03:50,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1053964976] [2022-03-20 19:03:51,086 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:03:51,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1189430640, now seen corresponding path program 1 times [2022-03-20 19:03:51,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:03:51,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552765131] [2022-03-20 19:03:51,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:03:51,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:03:51,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:03:51,089 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:03:51,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:03:51,090 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:03:51,090 INFO L85 PathProgramCache]: Analyzing trace with hash -526087773, now seen corresponding path program 146 times [2022-03-20 19:03:51,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:03:51,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370279605] [2022-03-20 19:03:51,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:03:51,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:03:51,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:03:52,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:03:52,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:03:52,144 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 74 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:03:52,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:03:52,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370279605] [2022-03-20 19:03:52,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370279605] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:03:52,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419169762] [2022-03-20 19:03:52,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:03:52,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:03:52,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:03:52,146 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) [2022-03-20 19:03:52,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-20 19:03:52,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:03:52,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:03:52,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 75 conjunts are in the unsatisfiable core [2022-03-20 19:03:52,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:03:52,407 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 74 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:03:52,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:03:55,618 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 74 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:03:55,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419169762] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:03:55,619 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:03:55,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 76, 76] total 152 [2022-03-20 19:03:55,619 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:03:55,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1053964976] [2022-03-20 19:03:55,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1053964976] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:03:55,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:03:55,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-03-20 19:03:55,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058373593] [2022-03-20 19:03:55,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:03:55,619 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-03-20 19:03:55,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:03:55,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-03-20 19:03:55,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11327, Invalid=11625, Unknown=0, NotChecked=0, Total=22952 [2022-03-20 19:03:55,621 INFO L87 Difference]: Start difference. First operand 161 states and 163 transitions. Second operand has 77 states, 77 states have (on average 2.012987012987013) internal successors, (155), 76 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) [2022-03-20 19:03:56,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:03:56,990 INFO L93 Difference]: Finished difference Result 170 states and 174 transitions. [2022-03-20 19:03:56,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-20 19:03:56,995 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.012987012987013) internal successors, (155), 76 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 [2022-03-20 19:03:56,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:03:56,995 INFO L225 Difference]: With dead ends: 170 [2022-03-20 19:03:56,995 INFO L226 Difference]: Without dead ends: 163 [2022-03-20 19:03:56,998 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3138 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=22502, Invalid=28348, Unknown=0, NotChecked=0, Total=50850 [2022-03-20 19:03:56,998 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 82 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:03:56,998 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 44 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:03:56,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-03-20 19:03:57,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2022-03-20 19:03:57,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 158 states have (on average 1.018987341772152) internal successors, (161), 158 states have internal predecessors, (161), 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) [2022-03-20 19:03:57,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 165 transitions. [2022-03-20 19:03:57,003 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 165 transitions. Word has length 159 [2022-03-20 19:03:57,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:03:57,003 INFO L478 AbstractCegarLoop]: Abstraction has 163 states and 165 transitions. [2022-03-20 19:03:57,003 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.012987012987013) internal successors, (155), 76 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) [2022-03-20 19:03:57,003 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 165 transitions. [2022-03-20 19:03:57,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-03-20 19:03:57,003 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:03:57,003 INFO L499 BasicCegarLoop]: trace histogram [75, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:03:57,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-03-20 19:03:57,219 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 [2022-03-20 19:03:57,220 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:03:57,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:03:57,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1146791808, now seen corresponding path program 147 times [2022-03-20 19:03:57,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:03:57,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [805345458] [2022-03-20 19:03:57,382 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:03:57,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1130325296, now seen corresponding path program 1 times [2022-03-20 19:03:57,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:03:57,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129196532] [2022-03-20 19:03:57,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:03:57,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:03:57,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:03:57,384 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:03:57,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:03:57,386 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:03:57,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1146791808, now seen corresponding path program 148 times [2022-03-20 19:03:57,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:03:57,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880420187] [2022-03-20 19:03:57,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:03:57,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:03:57,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:03:58,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:03:58,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:03:58,535 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 75 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:03:58,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:03:58,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880420187] [2022-03-20 19:03:58,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880420187] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:03:58,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99793093] [2022-03-20 19:03:58,536 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:03:58,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:03:58,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:03:58,537 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) [2022-03-20 19:03:58,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-20 19:03:58,609 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:03:58,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:03:58,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 76 conjunts are in the unsatisfiable core [2022-03-20 19:03:58,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:03:58,741 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 75 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:03:58,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:04:01,763 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 75 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:04:01,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99793093] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:04:01,763 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:04:01,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 77, 77] total 154 [2022-03-20 19:04:01,763 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:04:01,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [805345458] [2022-03-20 19:04:01,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [805345458] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:04:01,763 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:04:01,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-03-20 19:04:01,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429200928] [2022-03-20 19:04:01,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:04:01,764 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-03-20 19:04:01,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:04:01,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-03-20 19:04:01,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11630, Invalid=11932, Unknown=0, NotChecked=0, Total=23562 [2022-03-20 19:04:01,766 INFO L87 Difference]: Start difference. First operand 163 states and 165 transitions. Second operand has 78 states, 78 states have (on average 2.0128205128205128) internal successors, (157), 77 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) [2022-03-20 19:04:03,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:04:03,286 INFO L93 Difference]: Finished difference Result 172 states and 176 transitions. [2022-03-20 19:04:03,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-20 19:04:03,287 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.0128205128205128) internal successors, (157), 77 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 [2022-03-20 19:04:03,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:04:03,287 INFO L225 Difference]: With dead ends: 172 [2022-03-20 19:04:03,287 INFO L226 Difference]: Without dead ends: 165 [2022-03-20 19:04:03,289 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3218 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=23106, Invalid=29106, Unknown=0, NotChecked=0, Total=52212 [2022-03-20 19:04:03,289 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 83 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:04:03,289 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 29 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:04:03,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-03-20 19:04:03,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2022-03-20 19:04:03,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 160 states have (on average 1.01875) internal successors, (163), 160 states have internal predecessors, (163), 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) [2022-03-20 19:04:03,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 167 transitions. [2022-03-20 19:04:03,294 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 167 transitions. Word has length 161 [2022-03-20 19:04:03,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:04:03,294 INFO L478 AbstractCegarLoop]: Abstraction has 165 states and 167 transitions. [2022-03-20 19:04:03,294 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.0128205128205128) internal successors, (157), 77 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) [2022-03-20 19:04:03,294 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 167 transitions. [2022-03-20 19:04:03,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-03-20 19:04:03,295 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:04:03,295 INFO L499 BasicCegarLoop]: trace histogram [76, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:04:03,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-03-20 19:04:03,511 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 [2022-03-20 19:04:03,511 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:04:03,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:04:03,512 INFO L85 PathProgramCache]: Analyzing trace with hash -642915299, now seen corresponding path program 149 times [2022-03-20 19:04:03,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:04:03,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1491453845] [2022-03-20 19:04:03,723 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:04:03,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1071219952, now seen corresponding path program 1 times [2022-03-20 19:04:03,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:04:03,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159044279] [2022-03-20 19:04:03,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:04:03,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:04:03,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:04:03,725 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:04:03,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:04:03,728 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:04:03,728 INFO L85 PathProgramCache]: Analyzing trace with hash -642915299, now seen corresponding path program 150 times [2022-03-20 19:04:03,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:04:03,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088943631] [2022-03-20 19:04:03,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:04:03,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:04:03,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:04:05,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:04:05,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:04:05,373 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 76 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:04:05,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:04:05,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088943631] [2022-03-20 19:04:05,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088943631] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:04:05,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770235714] [2022-03-20 19:04:05,373 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 19:04:05,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:04:05,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:04:05,375 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) [2022-03-20 19:04:05,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-20 19:04:05,402 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 19:04:05,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:04:05,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 19:04:05,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:04:05,588 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 225 proven. 1 refuted. 0 times theorem prover too weak. 5550 trivial. 0 not checked. [2022-03-20 19:04:05,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:04:05,777 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 225 proven. 1 refuted. 0 times theorem prover too weak. 5550 trivial. 0 not checked. [2022-03-20 19:04:05,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770235714] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:04:05,777 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:04:05,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 4, 4] total 83 [2022-03-20 19:04:05,777 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:04:05,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1491453845] [2022-03-20 19:04:05,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1491453845] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:04:05,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:04:05,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-03-20 19:04:05,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905428876] [2022-03-20 19:04:05,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:04:05,778 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-03-20 19:04:05,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:04:05,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-03-20 19:04:05,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2022-03-20 19:04:05,779 INFO L87 Difference]: Start difference. First operand 165 states and 167 transitions. Second operand has 79 states, 79 states have (on average 2.0126582278481013) internal successors, (159), 78 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) [2022-03-20 19:04:07,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:04:07,850 INFO L93 Difference]: Finished difference Result 174 states and 178 transitions. [2022-03-20 19:04:07,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-20 19:04:07,850 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.0126582278481013) internal successors, (159), 78 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 [2022-03-20 19:04:07,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:04:07,857 INFO L225 Difference]: With dead ends: 174 [2022-03-20 19:04:07,857 INFO L226 Difference]: Without dead ends: 167 [2022-03-20 19:04:07,859 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2925 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=9631, Invalid=15491, Unknown=0, NotChecked=0, Total=25122 [2022-03-20 19:04:07,859 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 84 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:04:07,859 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 44 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:04:07,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-03-20 19:04:07,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2022-03-20 19:04:07,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 162 states have (on average 1.0185185185185186) internal successors, (165), 162 states have internal predecessors, (165), 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) [2022-03-20 19:04:07,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 169 transitions. [2022-03-20 19:04:07,865 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 169 transitions. Word has length 163 [2022-03-20 19:04:07,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:04:07,879 INFO L478 AbstractCegarLoop]: Abstraction has 167 states and 169 transitions. [2022-03-20 19:04:07,879 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.0126582278481013) internal successors, (159), 78 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) [2022-03-20 19:04:07,880 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 169 transitions. [2022-03-20 19:04:07,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-03-20 19:04:07,880 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:04:07,880 INFO L499 BasicCegarLoop]: trace histogram [77, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:04:07,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-03-20 19:04:08,080 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 [2022-03-20 19:04:08,081 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:04:08,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:04:08,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1748894598, now seen corresponding path program 151 times [2022-03-20 19:04:08,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:04:08,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1484403791] [2022-03-20 19:04:08,259 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:04:08,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1012114608, now seen corresponding path program 1 times [2022-03-20 19:04:08,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:04:08,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914477327] [2022-03-20 19:04:08,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:04:08,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:04:08,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:04:08,261 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:04:08,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:04:08,267 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:04:08,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1748894598, now seen corresponding path program 152 times [2022-03-20 19:04:08,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:04:08,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495092450] [2022-03-20 19:04:08,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:04:08,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:04:08,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:04:09,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:04:09,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:04:09,384 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 77 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:04:09,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:04:09,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495092450] [2022-03-20 19:04:09,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495092450] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:04:09,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469832214] [2022-03-20 19:04:09,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:04:09,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:04:09,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:04:09,386 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) [2022-03-20 19:04:09,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-20 19:04:09,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:04:09,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:04:09,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 78 conjunts are in the unsatisfiable core [2022-03-20 19:04:09,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:04:09,690 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 77 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:04:09,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:04:12,878 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 77 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:04:12,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469832214] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:04:12,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:04:12,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 79, 79] total 158 [2022-03-20 19:04:12,878 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:04:12,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1484403791] [2022-03-20 19:04:12,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1484403791] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:04:12,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:04:12,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-03-20 19:04:12,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201942998] [2022-03-20 19:04:12,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:04:12,879 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-03-20 19:04:12,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:04:12,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-03-20 19:04:12,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12248, Invalid=12558, Unknown=0, NotChecked=0, Total=24806 [2022-03-20 19:04:12,881 INFO L87 Difference]: Start difference. First operand 167 states and 169 transitions. Second operand has 80 states, 80 states have (on average 2.0125) internal successors, (161), 79 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) [2022-03-20 19:04:14,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:04:14,749 INFO L93 Difference]: Finished difference Result 176 states and 180 transitions. [2022-03-20 19:04:14,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-20 19:04:14,749 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.0125) internal successors, (161), 79 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 [2022-03-20 19:04:14,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:04:14,750 INFO L225 Difference]: With dead ends: 176 [2022-03-20 19:04:14,750 INFO L226 Difference]: Without dead ends: 169 [2022-03-20 19:04:14,753 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3381 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=24338, Invalid=30652, Unknown=0, NotChecked=0, Total=54990 [2022-03-20 19:04:14,753 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 85 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:04:14,753 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 54 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:04:14,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-03-20 19:04:14,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2022-03-20 19:04:14,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 164 states have (on average 1.0182926829268293) internal successors, (167), 164 states have internal predecessors, (167), 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) [2022-03-20 19:04:14,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 171 transitions. [2022-03-20 19:04:14,758 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 171 transitions. Word has length 165 [2022-03-20 19:04:14,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:04:14,758 INFO L478 AbstractCegarLoop]: Abstraction has 169 states and 171 transitions. [2022-03-20 19:04:14,758 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.0125) internal successors, (161), 79 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) [2022-03-20 19:04:14,758 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 171 transitions. [2022-03-20 19:04:14,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-03-20 19:04:14,758 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:04:14,758 INFO L499 BasicCegarLoop]: trace histogram [78, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:04:14,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-03-20 19:04:14,959 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 [2022-03-20 19:04:14,959 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:04:14,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:04:14,959 INFO L85 PathProgramCache]: Analyzing trace with hash 556888471, now seen corresponding path program 153 times [2022-03-20 19:04:14,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:04:14,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1052468475] [2022-03-20 19:04:15,122 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:04:15,122 INFO L85 PathProgramCache]: Analyzing trace with hash -953009264, now seen corresponding path program 1 times [2022-03-20 19:04:15,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:04:15,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989028048] [2022-03-20 19:04:15,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:04:15,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:04:15,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:04:15,124 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:04:15,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:04:15,125 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:04:15,126 INFO L85 PathProgramCache]: Analyzing trace with hash 556888471, now seen corresponding path program 154 times [2022-03-20 19:04:15,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:04:15,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926089678] [2022-03-20 19:04:15,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:04:15,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:04:15,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:04:17,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:04:17,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:04:17,022 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 78 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:04:17,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:04:17,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926089678] [2022-03-20 19:04:17,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926089678] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:04:17,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792659381] [2022-03-20 19:04:17,023 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:04:17,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:04:17,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:04:17,024 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) [2022-03-20 19:04:17,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-20 19:04:17,083 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:04:17,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:04:17,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 79 conjunts are in the unsatisfiable core [2022-03-20 19:04:17,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:04:17,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 78 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:04:17,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:04:20,931 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 78 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:04:20,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792659381] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:04:20,931 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:04:20,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 80, 80] total 160 [2022-03-20 19:04:20,931 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:04:20,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1052468475] [2022-03-20 19:04:20,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1052468475] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:04:20,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:04:20,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-03-20 19:04:20,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137578582] [2022-03-20 19:04:20,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:04:20,932 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-03-20 19:04:20,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:04:20,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-03-20 19:04:20,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12563, Invalid=12877, Unknown=0, NotChecked=0, Total=25440 [2022-03-20 19:04:20,933 INFO L87 Difference]: Start difference. First operand 169 states and 171 transitions. Second operand has 81 states, 81 states have (on average 2.0123456790123457) internal successors, (163), 80 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) [2022-03-20 19:04:22,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:04:22,423 INFO L93 Difference]: Finished difference Result 178 states and 182 transitions. [2022-03-20 19:04:22,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-03-20 19:04:22,424 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.0123456790123457) internal successors, (163), 80 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 [2022-03-20 19:04:22,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:04:22,424 INFO L225 Difference]: With dead ends: 178 [2022-03-20 19:04:22,424 INFO L226 Difference]: Without dead ends: 171 [2022-03-20 19:04:22,427 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 236 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3464 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=24966, Invalid=31440, Unknown=0, NotChecked=0, Total=56406 [2022-03-20 19:04:22,427 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 86 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:04:22,427 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 34 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:04:22,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-03-20 19:04:22,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2022-03-20 19:04:22,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.0180722891566265) internal successors, (169), 166 states have internal predecessors, (169), 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) [2022-03-20 19:04:22,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 173 transitions. [2022-03-20 19:04:22,432 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 173 transitions. Word has length 167 [2022-03-20 19:04:22,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:04:22,432 INFO L478 AbstractCegarLoop]: Abstraction has 171 states and 173 transitions. [2022-03-20 19:04:22,433 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.0123456790123457) internal successors, (163), 80 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) [2022-03-20 19:04:22,433 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 173 transitions. [2022-03-20 19:04:22,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-03-20 19:04:22,433 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:04:22,433 INFO L499 BasicCegarLoop]: trace histogram [79, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:04:22,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-03-20 19:04:22,649 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 [2022-03-20 19:04:22,650 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:04:22,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:04:22,650 INFO L85 PathProgramCache]: Analyzing trace with hash 211293044, now seen corresponding path program 155 times [2022-03-20 19:04:22,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:04:22,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [36748257] [2022-03-20 19:04:22,796 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:04:22,797 INFO L85 PathProgramCache]: Analyzing trace with hash -893903920, now seen corresponding path program 1 times [2022-03-20 19:04:22,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:04:22,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026238969] [2022-03-20 19:04:22,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:04:22,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:04:22,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:04:22,799 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:04:22,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:04:22,800 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:04:22,800 INFO L85 PathProgramCache]: Analyzing trace with hash 211293044, now seen corresponding path program 156 times [2022-03-20 19:04:22,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:04:22,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212084162] [2022-03-20 19:04:22,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:04:22,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:04:22,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:04:24,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:04:24,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:04:24,060 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 79 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:04:24,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:04:24,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212084162] [2022-03-20 19:04:24,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212084162] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:04:24,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724858479] [2022-03-20 19:04:24,061 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 19:04:24,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:04:24,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:04:24,062 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) [2022-03-20 19:04:24,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-20 19:04:24,089 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 19:04:24,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:04:24,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 19:04:24,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:04:24,238 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 234 proven. 1 refuted. 0 times theorem prover too weak. 6006 trivial. 0 not checked. [2022-03-20 19:04:24,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:04:24,367 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 234 proven. 1 refuted. 0 times theorem prover too weak. 6006 trivial. 0 not checked. [2022-03-20 19:04:24,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724858479] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:04:24,368 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:04:24,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 4, 4] total 86 [2022-03-20 19:04:24,368 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:04:24,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [36748257] [2022-03-20 19:04:24,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [36748257] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:04:24,368 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:04:24,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-03-20 19:04:24,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753016909] [2022-03-20 19:04:24,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:04:24,368 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-03-20 19:04:24,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:04:24,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-03-20 19:04:24,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2022-03-20 19:04:24,370 INFO L87 Difference]: Start difference. First operand 171 states and 173 transitions. Second operand has 82 states, 82 states have (on average 2.0121951219512195) internal successors, (165), 81 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) [2022-03-20 19:04:25,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:04:25,894 INFO L93 Difference]: Finished difference Result 180 states and 184 transitions. [2022-03-20 19:04:25,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-03-20 19:04:25,894 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.0121951219512195) internal successors, (165), 81 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 [2022-03-20 19:04:25,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:04:25,895 INFO L225 Difference]: With dead ends: 180 [2022-03-20 19:04:25,895 INFO L226 Difference]: Without dead ends: 173 [2022-03-20 19:04:25,896 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3159 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=10366, Invalid=16694, Unknown=0, NotChecked=0, Total=27060 [2022-03-20 19:04:25,896 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 87 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:04:25,896 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 54 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:04:25,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-03-20 19:04:25,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2022-03-20 19:04:25,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 168 states have (on average 1.0178571428571428) internal successors, (171), 168 states have internal predecessors, (171), 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) [2022-03-20 19:04:25,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 175 transitions. [2022-03-20 19:04:25,901 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 175 transitions. Word has length 169 [2022-03-20 19:04:25,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:04:25,901 INFO L478 AbstractCegarLoop]: Abstraction has 173 states and 175 transitions. [2022-03-20 19:04:25,901 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.0121951219512195) internal successors, (165), 81 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) [2022-03-20 19:04:25,902 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 175 transitions. [2022-03-20 19:04:25,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-03-20 19:04:25,902 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:04:25,902 INFO L499 BasicCegarLoop]: trace histogram [80, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:04:25,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-03-20 19:04:26,118 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 [2022-03-20 19:04:26,119 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:04:26,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:04:26,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1193430511, now seen corresponding path program 157 times [2022-03-20 19:04:26,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:04:26,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [830629131] [2022-03-20 19:04:26,248 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:04:26,248 INFO L85 PathProgramCache]: Analyzing trace with hash -834798576, now seen corresponding path program 1 times [2022-03-20 19:04:26,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:04:26,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400044349] [2022-03-20 19:04:26,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:04:26,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:04:26,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:04:26,250 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:04:26,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:04:26,252 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:04:26,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1193430511, now seen corresponding path program 158 times [2022-03-20 19:04:26,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:04:26,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328258558] [2022-03-20 19:04:26,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:04:26,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:04:26,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:04:27,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:04:27,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:04:27,440 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 80 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:04:27,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:04:27,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328258558] [2022-03-20 19:04:27,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328258558] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:04:27,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157594795] [2022-03-20 19:04:27,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:04:27,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:04:27,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:04:27,442 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) [2022-03-20 19:04:27,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-20 19:04:27,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:04:27,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:04:27,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 81 conjunts are in the unsatisfiable core [2022-03-20 19:04:27,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:04:27,712 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 80 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:04:27,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:04:31,392 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 80 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:04:31,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157594795] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:04:31,392 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:04:31,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 82, 82] total 164 [2022-03-20 19:04:31,393 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:04:31,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [830629131] [2022-03-20 19:04:31,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [830629131] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:04:31,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:04:31,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-03-20 19:04:31,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539970301] [2022-03-20 19:04:31,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:04:31,393 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-03-20 19:04:31,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:04:31,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-03-20 19:04:31,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13205, Invalid=13527, Unknown=0, NotChecked=0, Total=26732 [2022-03-20 19:04:31,395 INFO L87 Difference]: Start difference. First operand 173 states and 175 transitions. Second operand has 83 states, 83 states have (on average 2.0120481927710845) internal successors, (167), 82 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) [2022-03-20 19:04:32,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:04:32,988 INFO L93 Difference]: Finished difference Result 182 states and 186 transitions. [2022-03-20 19:04:32,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-03-20 19:04:32,988 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.0120481927710845) internal successors, (167), 82 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 [2022-03-20 19:04:32,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:04:32,989 INFO L225 Difference]: With dead ends: 182 [2022-03-20 19:04:32,989 INFO L226 Difference]: Without dead ends: 175 [2022-03-20 19:04:32,991 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3633 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=26246, Invalid=33046, Unknown=0, NotChecked=0, Total=59292 [2022-03-20 19:04:32,992 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 88 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:04:32,992 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 39 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:04:32,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-03-20 19:04:32,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2022-03-20 19:04:32,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 170 states have (on average 1.0176470588235293) internal successors, (173), 170 states have internal predecessors, (173), 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) [2022-03-20 19:04:32,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 177 transitions. [2022-03-20 19:04:32,997 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 177 transitions. Word has length 171 [2022-03-20 19:04:32,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:04:32,997 INFO L478 AbstractCegarLoop]: Abstraction has 175 states and 177 transitions. [2022-03-20 19:04:32,997 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.0120481927710845) internal successors, (167), 82 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) [2022-03-20 19:04:32,997 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 177 transitions. [2022-03-20 19:04:32,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-03-20 19:04:32,998 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:04:32,998 INFO L499 BasicCegarLoop]: trace histogram [81, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:04:33,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-03-20 19:04:33,216 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 [2022-03-20 19:04:33,217 INFO L403 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:04:33,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:04:33,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1781931374, now seen corresponding path program 159 times [2022-03-20 19:04:33,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:04:33,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [237045466] [2022-03-20 19:04:33,448 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:04:33,448 INFO L85 PathProgramCache]: Analyzing trace with hash -775693232, now seen corresponding path program 1 times [2022-03-20 19:04:33,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:04:33,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816733351] [2022-03-20 19:04:33,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:04:33,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:04:33,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:04:33,451 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:04:33,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:04:33,453 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:04:33,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1781931374, now seen corresponding path program 160 times [2022-03-20 19:04:33,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:04:33,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298075149] [2022-03-20 19:04:33,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:04:33,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:04:33,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:04:35,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:04:35,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:04:35,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 81 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:04:35,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:04:35,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298075149] [2022-03-20 19:04:35,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298075149] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:04:35,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613300482] [2022-03-20 19:04:35,080 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:04:35,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:04:35,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:04:35,082 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) [2022-03-20 19:04:35,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-20 19:04:35,132 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:04:35,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:04:35,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 82 conjunts are in the unsatisfiable core [2022-03-20 19:04:35,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:04:35,418 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 81 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:04:35,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:04:40,756 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 81 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:04:40,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613300482] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:04:40,756 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:04:40,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 83, 83] total 166 [2022-03-20 19:04:40,756 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:04:40,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [237045466] [2022-03-20 19:04:40,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [237045466] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:04:40,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:04:40,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-03-20 19:04:40,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130797597] [2022-03-20 19:04:40,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:04:40,757 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-03-20 19:04:40,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:04:40,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-03-20 19:04:40,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13532, Invalid=13858, Unknown=0, NotChecked=0, Total=27390 [2022-03-20 19:04:40,759 INFO L87 Difference]: Start difference. First operand 175 states and 177 transitions. Second operand has 84 states, 84 states have (on average 2.011904761904762) internal successors, (169), 83 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) [2022-03-20 19:04:42,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:04:42,392 INFO L93 Difference]: Finished difference Result 184 states and 188 transitions. [2022-03-20 19:04:42,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-03-20 19:04:42,392 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.011904761904762) internal successors, (169), 83 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 [2022-03-20 19:04:42,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:04:42,393 INFO L225 Difference]: With dead ends: 184 [2022-03-20 19:04:42,393 INFO L226 Difference]: Without dead ends: 177 [2022-03-20 19:04:42,397 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3719 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=26898, Invalid=33864, Unknown=0, NotChecked=0, Total=60762 [2022-03-20 19:04:42,397 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 89 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:04:42,397 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 39 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:04:42,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-03-20 19:04:42,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2022-03-20 19:04:42,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 172 states have (on average 1.0174418604651163) internal successors, (175), 172 states have internal predecessors, (175), 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) [2022-03-20 19:04:42,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 179 transitions. [2022-03-20 19:04:42,402 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 179 transitions. Word has length 173 [2022-03-20 19:04:42,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:04:42,402 INFO L478 AbstractCegarLoop]: Abstraction has 177 states and 179 transitions. [2022-03-20 19:04:42,402 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.011904761904762) internal successors, (169), 83 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) [2022-03-20 19:04:42,403 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 179 transitions. [2022-03-20 19:04:42,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-03-20 19:04:42,403 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:04:42,403 INFO L499 BasicCegarLoop]: trace histogram [82, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:04:42,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-03-20 19:04:42,617 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 [2022-03-20 19:04:42,618 INFO L403 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:04:42,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:04:42,618 INFO L85 PathProgramCache]: Analyzing trace with hash 656483723, now seen corresponding path program 161 times [2022-03-20 19:04:42,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:04:42,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1538568309] [2022-03-20 19:04:42,777 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:04:42,777 INFO L85 PathProgramCache]: Analyzing trace with hash -716587888, now seen corresponding path program 1 times [2022-03-20 19:04:42,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:04:42,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458084932] [2022-03-20 19:04:42,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:04:42,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:04:42,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:04:42,779 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:04:42,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:04:42,800 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:04:42,800 INFO L85 PathProgramCache]: Analyzing trace with hash 656483723, now seen corresponding path program 162 times [2022-03-20 19:04:42,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:04:42,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006844077] [2022-03-20 19:04:42,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:04:42,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:04:42,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:04:44,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:04:44,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:04:44,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 82 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:04:44,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:04:44,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006844077] [2022-03-20 19:04:44,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006844077] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:04:44,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093695557] [2022-03-20 19:04:44,171 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 19:04:44,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:04:44,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:04:44,172 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) [2022-03-20 19:04:44,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-20 19:04:44,200 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 19:04:44,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:04:44,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 19:04:44,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:04:44,365 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 243 proven. 1 refuted. 0 times theorem prover too weak. 6480 trivial. 0 not checked. [2022-03-20 19:04:44,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:04:44,497 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 243 proven. 1 refuted. 0 times theorem prover too weak. 6480 trivial. 0 not checked. [2022-03-20 19:04:44,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093695557] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:04:44,497 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:04:44,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 4, 4] total 89 [2022-03-20 19:04:44,498 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:04:44,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1538568309] [2022-03-20 19:04:44,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1538568309] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:04:44,498 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:04:44,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-03-20 19:04:44,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321184893] [2022-03-20 19:04:44,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:04:44,498 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-03-20 19:04:44,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:04:44,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-03-20 19:04:44,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2022-03-20 19:04:44,499 INFO L87 Difference]: Start difference. First operand 177 states and 179 transitions. Second operand has 85 states, 85 states have (on average 2.011764705882353) internal successors, (171), 84 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) [2022-03-20 19:04:46,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:04:46,145 INFO L93 Difference]: Finished difference Result 186 states and 190 transitions. [2022-03-20 19:04:46,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-03-20 19:04:46,145 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.011764705882353) internal successors, (171), 84 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 [2022-03-20 19:04:46,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:04:46,146 INFO L225 Difference]: With dead ends: 186 [2022-03-20 19:04:46,146 INFO L226 Difference]: Without dead ends: 179 [2022-03-20 19:04:46,147 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 348 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3402 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=11128, Invalid=17942, Unknown=0, NotChecked=0, Total=29070 [2022-03-20 19:04:46,147 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 90 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:04:46,147 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 44 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:04:46,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-03-20 19:04:46,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2022-03-20 19:04:46,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 174 states have (on average 1.0172413793103448) internal successors, (177), 174 states have internal predecessors, (177), 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) [2022-03-20 19:04:46,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 181 transitions. [2022-03-20 19:04:46,152 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 181 transitions. Word has length 175 [2022-03-20 19:04:46,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:04:46,152 INFO L478 AbstractCegarLoop]: Abstraction has 179 states and 181 transitions. [2022-03-20 19:04:46,152 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.011764705882353) internal successors, (171), 84 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) [2022-03-20 19:04:46,152 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 181 transitions. [2022-03-20 19:04:46,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-03-20 19:04:46,153 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:04:46,153 INFO L499 BasicCegarLoop]: trace histogram [83, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:04:46,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-03-20 19:04:46,369 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 [2022-03-20 19:04:46,369 INFO L403 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:04:46,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:04:46,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1433049704, now seen corresponding path program 163 times [2022-03-20 19:04:46,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:04:46,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1532076638] [2022-03-20 19:04:46,490 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:04:46,491 INFO L85 PathProgramCache]: Analyzing trace with hash -657482544, now seen corresponding path program 1 times [2022-03-20 19:04:46,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:04:46,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688734553] [2022-03-20 19:04:46,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:04:46,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:04:46,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:04:46,493 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:04:46,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:04:46,496 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:04:46,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1433049704, now seen corresponding path program 164 times [2022-03-20 19:04:46,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:04:46,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90198582] [2022-03-20 19:04:46,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:04:46,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:04:46,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:04:47,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:04:47,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:04:47,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 83 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:04:47,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:04:47,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90198582] [2022-03-20 19:04:47,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90198582] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:04:47,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225470386] [2022-03-20 19:04:47,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:04:47,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:04:47,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:04:47,743 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) [2022-03-20 19:04:47,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-20 19:04:47,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:04:47,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:04:47,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 84 conjunts are in the unsatisfiable core [2022-03-20 19:04:47,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:04:48,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 83 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:04:48,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:04:52,492 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 83 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:04:52,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225470386] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:04:52,493 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:04:52,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 85, 85] total 170 [2022-03-20 19:04:52,493 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:04:52,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1532076638] [2022-03-20 19:04:52,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1532076638] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:04:52,493 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:04:52,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-03-20 19:04:52,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5001362] [2022-03-20 19:04:52,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:04:52,493 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-03-20 19:04:52,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:04:52,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-03-20 19:04:52,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14198, Invalid=14532, Unknown=0, NotChecked=0, Total=28730 [2022-03-20 19:04:52,496 INFO L87 Difference]: Start difference. First operand 179 states and 181 transitions. Second operand has 86 states, 86 states have (on average 2.011627906976744) internal successors, (173), 85 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) [2022-03-20 19:04:54,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:04:54,451 INFO L93 Difference]: Finished difference Result 188 states and 192 transitions. [2022-03-20 19:04:54,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-20 19:04:54,451 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.011627906976744) internal successors, (173), 85 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 [2022-03-20 19:04:54,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:04:54,452 INFO L225 Difference]: With dead ends: 188 [2022-03-20 19:04:54,452 INFO L226 Difference]: Without dead ends: 181 [2022-03-20 19:04:54,456 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3894 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=28226, Invalid=35530, Unknown=0, NotChecked=0, Total=63756 [2022-03-20 19:04:54,456 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 91 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:04:54,456 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 54 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:04:54,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-03-20 19:04:54,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2022-03-20 19:04:54,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.0170454545454546) internal successors, (179), 176 states have internal predecessors, (179), 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) [2022-03-20 19:04:54,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 183 transitions. [2022-03-20 19:04:54,477 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 183 transitions. Word has length 177 [2022-03-20 19:04:54,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:04:54,477 INFO L478 AbstractCegarLoop]: Abstraction has 181 states and 183 transitions. [2022-03-20 19:04:54,478 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.011627906976744) internal successors, (173), 85 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) [2022-03-20 19:04:54,478 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 183 transitions. [2022-03-20 19:04:54,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-03-20 19:04:54,478 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:04:54,478 INFO L499 BasicCegarLoop]: trace histogram [84, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:04:54,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-03-20 19:04:54,694 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 [2022-03-20 19:04:54,694 INFO L403 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:04:54,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:04:54,695 INFO L85 PathProgramCache]: Analyzing trace with hash 388647941, now seen corresponding path program 165 times [2022-03-20 19:04:54,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:04:54,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [673198210] [2022-03-20 19:04:54,822 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:04:54,822 INFO L85 PathProgramCache]: Analyzing trace with hash -598377200, now seen corresponding path program 1 times [2022-03-20 19:04:54,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:04:54,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874171684] [2022-03-20 19:04:54,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:04:54,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:04:54,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:04:54,824 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:04:54,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:04:54,825 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:04:54,825 INFO L85 PathProgramCache]: Analyzing trace with hash 388647941, now seen corresponding path program 166 times [2022-03-20 19:04:54,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:04:54,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416047928] [2022-03-20 19:04:54,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:04:54,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:04:54,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:04:56,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:04:56,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:04:56,101 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 84 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:04:56,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:04:56,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416047928] [2022-03-20 19:04:56,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416047928] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:04:56,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110401594] [2022-03-20 19:04:56,102 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:04:56,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:04:56,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:04:56,103 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) [2022-03-20 19:04:56,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-03-20 19:04:56,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:04:56,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:04:56,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 85 conjunts are in the unsatisfiable core [2022-03-20 19:04:56,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:04:56,476 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 84 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:04:56,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:05:00,900 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 84 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:05:00,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110401594] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:05:00,900 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:05:00,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 86, 86] total 172 [2022-03-20 19:05:00,900 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:05:00,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [673198210] [2022-03-20 19:05:00,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [673198210] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:05:00,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:05:00,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-03-20 19:05:00,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380401865] [2022-03-20 19:05:00,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:05:00,901 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-03-20 19:05:00,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:05:00,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-03-20 19:05:00,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14537, Invalid=14875, Unknown=0, NotChecked=0, Total=29412 [2022-03-20 19:05:00,904 INFO L87 Difference]: Start difference. First operand 181 states and 183 transitions. Second operand has 87 states, 87 states have (on average 2.0114942528735633) internal successors, (175), 86 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) [2022-03-20 19:05:02,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:05:02,669 INFO L93 Difference]: Finished difference Result 190 states and 194 transitions. [2022-03-20 19:05:02,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-03-20 19:05:02,669 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.0114942528735633) internal successors, (175), 86 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 [2022-03-20 19:05:02,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:05:02,670 INFO L225 Difference]: With dead ends: 190 [2022-03-20 19:05:02,670 INFO L226 Difference]: Without dead ends: 183 [2022-03-20 19:05:02,674 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 529 GetRequests, 275 SyntacticMatches, 0 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3983 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=28902, Invalid=36378, Unknown=0, NotChecked=0, Total=65280 [2022-03-20 19:05:02,674 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 92 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:05:02,674 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 44 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:05:02,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-03-20 19:05:02,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2022-03-20 19:05:02,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 178 states have (on average 1.0168539325842696) internal successors, (181), 178 states have internal predecessors, (181), 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) [2022-03-20 19:05:02,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 185 transitions. [2022-03-20 19:05:02,679 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 185 transitions. Word has length 179 [2022-03-20 19:05:02,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:05:02,680 INFO L478 AbstractCegarLoop]: Abstraction has 183 states and 185 transitions. [2022-03-20 19:05:02,680 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.0114942528735633) internal successors, (175), 86 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) [2022-03-20 19:05:02,680 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 185 transitions. [2022-03-20 19:05:02,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-03-20 19:05:02,680 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:05:02,680 INFO L499 BasicCegarLoop]: trace histogram [85, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:05:02,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-03-20 19:05:02,895 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 [2022-03-20 19:05:02,895 INFO L403 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:05:02,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:05:02,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1740900962, now seen corresponding path program 167 times [2022-03-20 19:05:02,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:05:02,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1619972400] [2022-03-20 19:05:03,081 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:05:03,081 INFO L85 PathProgramCache]: Analyzing trace with hash -539271856, now seen corresponding path program 1 times [2022-03-20 19:05:03,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:05:03,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185954931] [2022-03-20 19:05:03,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:05:03,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:05:03,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:05:03,085 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:05:03,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:05:03,087 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:05:03,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1740900962, now seen corresponding path program 168 times [2022-03-20 19:05:03,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:05:03,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978949886] [2022-03-20 19:05:03,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:05:03,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:05:03,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:05:04,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:05:04,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:05:04,380 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 85 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:05:04,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:05:04,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978949886] [2022-03-20 19:05:04,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978949886] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:05:04,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161814156] [2022-03-20 19:05:04,381 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 19:05:04,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:05:04,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:05:04,382 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) [2022-03-20 19:05:04,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-03-20 19:05:04,409 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 19:05:04,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:05:04,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 19:05:04,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:05:04,584 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 252 proven. 1 refuted. 0 times theorem prover too weak. 6972 trivial. 0 not checked. [2022-03-20 19:05:04,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:05:04,723 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 252 proven. 1 refuted. 0 times theorem prover too weak. 6972 trivial. 0 not checked. [2022-03-20 19:05:04,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161814156] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:05:04,723 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:05:04,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 4, 4] total 92 [2022-03-20 19:05:04,724 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:05:04,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1619972400] [2022-03-20 19:05:04,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1619972400] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:05:04,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:05:04,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-03-20 19:05:04,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047854406] [2022-03-20 19:05:04,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:05:04,724 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-03-20 19:05:04,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:05:04,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-03-20 19:05:04,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2022-03-20 19:05:04,725 INFO L87 Difference]: Start difference. First operand 183 states and 185 transitions. Second operand has 88 states, 88 states have (on average 2.0113636363636362) internal successors, (177), 87 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) [2022-03-20 19:05:06,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:05:06,515 INFO L93 Difference]: Finished difference Result 192 states and 196 transitions. [2022-03-20 19:05:06,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-03-20 19:05:06,515 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.0113636363636362) internal successors, (177), 87 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 [2022-03-20 19:05:06,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:05:06,516 INFO L225 Difference]: With dead ends: 192 [2022-03-20 19:05:06,516 INFO L226 Difference]: Without dead ends: 185 [2022-03-20 19:05:06,518 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 535 GetRequests, 360 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3654 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=11917, Invalid=19235, Unknown=0, NotChecked=0, Total=31152 [2022-03-20 19:05:06,518 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 93 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:05:06,518 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 39 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:05:06,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-03-20 19:05:06,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2022-03-20 19:05:06,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 180 states have (on average 1.0166666666666666) internal successors, (183), 180 states have internal predecessors, (183), 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) [2022-03-20 19:05:06,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 187 transitions. [2022-03-20 19:05:06,523 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 187 transitions. Word has length 181 [2022-03-20 19:05:06,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:05:06,523 INFO L478 AbstractCegarLoop]: Abstraction has 185 states and 187 transitions. [2022-03-20 19:05:06,523 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.0113636363636362) internal successors, (177), 87 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) [2022-03-20 19:05:06,523 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 187 transitions. [2022-03-20 19:05:06,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-03-20 19:05:06,524 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:05:06,524 INFO L499 BasicCegarLoop]: trace histogram [86, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:05:06,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-03-20 19:05:06,739 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 [2022-03-20 19:05:06,739 INFO L403 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:05:06,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:05:06,740 INFO L85 PathProgramCache]: Analyzing trace with hash -119036545, now seen corresponding path program 169 times [2022-03-20 19:05:06,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:05:06,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1791369994] [2022-03-20 19:05:06,896 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:05:06,896 INFO L85 PathProgramCache]: Analyzing trace with hash -480166512, now seen corresponding path program 1 times [2022-03-20 19:05:06,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:05:06,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522427381] [2022-03-20 19:05:06,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:05:06,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:05:06,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:05:06,905 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:05:06,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:05:06,908 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:05:06,908 INFO L85 PathProgramCache]: Analyzing trace with hash -119036545, now seen corresponding path program 170 times [2022-03-20 19:05:06,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:05:06,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452777113] [2022-03-20 19:05:06,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:05:06,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:05:06,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:05:08,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:05:08,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:05:08,232 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 86 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:05:08,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:05:08,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452777113] [2022-03-20 19:05:08,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452777113] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:05:08,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417590876] [2022-03-20 19:05:08,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:05:08,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:05:08,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:05:08,234 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) [2022-03-20 19:05:08,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-03-20 19:05:08,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:05:08,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:05:08,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 87 conjunts are in the unsatisfiable core [2022-03-20 19:05:08,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:05:08,456 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 86 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:05:08,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:05:12,799 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 86 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:05:12,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417590876] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:05:12,800 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:05:12,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 88, 88] total 176 [2022-03-20 19:05:12,800 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:05:12,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1791369994] [2022-03-20 19:05:12,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1791369994] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:05:12,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:05:12,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-03-20 19:05:12,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615684253] [2022-03-20 19:05:12,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:05:12,801 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-03-20 19:05:12,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:05:12,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-03-20 19:05:12,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15227, Invalid=15573, Unknown=0, NotChecked=0, Total=30800 [2022-03-20 19:05:12,803 INFO L87 Difference]: Start difference. First operand 185 states and 187 transitions. Second operand has 89 states, 89 states have (on average 2.0112359550561796) internal successors, (179), 88 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) [2022-03-20 19:05:14,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:05:14,648 INFO L93 Difference]: Finished difference Result 194 states and 198 transitions. [2022-03-20 19:05:14,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-03-20 19:05:14,663 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.0112359550561796) internal successors, (179), 88 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 [2022-03-20 19:05:14,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:05:14,664 INFO L225 Difference]: With dead ends: 194 [2022-03-20 19:05:14,664 INFO L226 Difference]: Without dead ends: 187 [2022-03-20 19:05:14,667 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 541 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 260 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4164 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=30278, Invalid=38104, Unknown=0, NotChecked=0, Total=68382 [2022-03-20 19:05:14,667 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 94 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:05:14,675 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 44 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:05:14,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-03-20 19:05:14,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2022-03-20 19:05:14,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 182 states have (on average 1.0164835164835164) internal successors, (185), 182 states have internal predecessors, (185), 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) [2022-03-20 19:05:14,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 189 transitions. [2022-03-20 19:05:14,681 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 189 transitions. Word has length 183 [2022-03-20 19:05:14,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:05:14,681 INFO L478 AbstractCegarLoop]: Abstraction has 187 states and 189 transitions. [2022-03-20 19:05:14,681 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.0112359550561796) internal successors, (179), 88 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) [2022-03-20 19:05:14,681 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 189 transitions. [2022-03-20 19:05:14,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-03-20 19:05:14,682 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:05:14,682 INFO L499 BasicCegarLoop]: trace histogram [87, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:05:14,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-03-20 19:05:14,898 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 [2022-03-20 19:05:14,899 INFO L403 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:05:14,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:05:14,899 INFO L85 PathProgramCache]: Analyzing trace with hash -812585636, now seen corresponding path program 171 times [2022-03-20 19:05:14,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:05:14,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [910207356] [2022-03-20 19:05:15,171 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:05:15,171 INFO L85 PathProgramCache]: Analyzing trace with hash -421061168, now seen corresponding path program 1 times [2022-03-20 19:05:15,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:05:15,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259662260] [2022-03-20 19:05:15,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:05:15,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:05:15,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:05:15,173 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:05:15,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:05:15,175 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:05:15,175 INFO L85 PathProgramCache]: Analyzing trace with hash -812585636, now seen corresponding path program 172 times [2022-03-20 19:05:15,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:05:15,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812740494] [2022-03-20 19:05:15,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:05:15,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:05:15,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:05:16,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:05:16,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:05:16,552 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 87 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:05:16,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:05:16,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812740494] [2022-03-20 19:05:16,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812740494] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:05:16,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964475646] [2022-03-20 19:05:16,552 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:05:16,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:05:16,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:05:16,554 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) [2022-03-20 19:05:16,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-03-20 19:05:16,606 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:05:16,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:05:16,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 88 conjunts are in the unsatisfiable core [2022-03-20 19:05:16,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:05:16,761 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 87 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:05:16,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:05:20,832 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 87 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:05:20,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964475646] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:05:20,832 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:05:20,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 89, 89] total 178 [2022-03-20 19:05:20,832 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:05:20,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [910207356] [2022-03-20 19:05:20,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [910207356] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:05:20,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:05:20,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-03-20 19:05:20,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132646648] [2022-03-20 19:05:20,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:05:20,833 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-03-20 19:05:20,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:05:20,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-03-20 19:05:20,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15578, Invalid=15928, Unknown=0, NotChecked=0, Total=31506 [2022-03-20 19:05:20,835 INFO L87 Difference]: Start difference. First operand 187 states and 189 transitions. Second operand has 90 states, 90 states have (on average 2.011111111111111) internal successors, (181), 89 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) [2022-03-20 19:05:22,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:05:22,714 INFO L93 Difference]: Finished difference Result 196 states and 200 transitions. [2022-03-20 19:05:22,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-03-20 19:05:22,714 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.011111111111111) internal successors, (181), 89 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 [2022-03-20 19:05:22,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:05:22,715 INFO L225 Difference]: With dead ends: 196 [2022-03-20 19:05:22,715 INFO L226 Difference]: Without dead ends: 189 [2022-03-20 19:05:22,718 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 547 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4256 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=30978, Invalid=38982, Unknown=0, NotChecked=0, Total=69960 [2022-03-20 19:05:22,718 INFO L913 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, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:05:22,718 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 39 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:05:22,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-03-20 19:05:22,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2022-03-20 19:05:22,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 184 states have (on average 1.016304347826087) internal successors, (187), 184 states have internal predecessors, (187), 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) [2022-03-20 19:05:22,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 191 transitions. [2022-03-20 19:05:22,723 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 191 transitions. Word has length 185 [2022-03-20 19:05:22,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:05:22,723 INFO L478 AbstractCegarLoop]: Abstraction has 189 states and 191 transitions. [2022-03-20 19:05:22,723 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.011111111111111) internal successors, (181), 89 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) [2022-03-20 19:05:22,724 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 191 transitions. [2022-03-20 19:05:22,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-03-20 19:05:22,724 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:05:22,724 INFO L499 BasicCegarLoop]: trace histogram [88, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:05:22,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-03-20 19:05:22,936 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 [2022-03-20 19:05:22,936 INFO L403 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:05:22,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:05:22,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1593331207, now seen corresponding path program 173 times [2022-03-20 19:05:22,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:05:22,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1130962482] [2022-03-20 19:05:23,153 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:05:23,154 INFO L85 PathProgramCache]: Analyzing trace with hash -361955824, now seen corresponding path program 1 times [2022-03-20 19:05:23,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:05:23,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800239684] [2022-03-20 19:05:23,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:05:23,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:05:23,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:05:23,156 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:05:23,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:05:23,157 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:05:23,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1593331207, now seen corresponding path program 174 times [2022-03-20 19:05:23,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:05:23,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474396265] [2022-03-20 19:05:23,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:05:23,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:05:23,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:05:24,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:05:24,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:05:24,557 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 88 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:05:24,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:05:24,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474396265] [2022-03-20 19:05:24,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474396265] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:05:24,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634054726] [2022-03-20 19:05:24,557 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 19:05:24,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:05:24,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:05:24,559 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) [2022-03-20 19:05:24,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-03-20 19:05:24,586 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 19:05:24,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:05:24,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 19:05:24,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:05:24,746 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 261 proven. 1 refuted. 0 times theorem prover too weak. 7482 trivial. 0 not checked. [2022-03-20 19:05:24,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:05:24,893 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 261 proven. 1 refuted. 0 times theorem prover too weak. 7482 trivial. 0 not checked. [2022-03-20 19:05:24,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634054726] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:05:24,893 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:05:24,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 4, 4] total 95 [2022-03-20 19:05:24,894 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:05:24,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1130962482] [2022-03-20 19:05:24,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1130962482] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:05:24,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:05:24,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-03-20 19:05:24,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157838626] [2022-03-20 19:05:24,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:05:24,894 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-03-20 19:05:24,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:05:24,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-03-20 19:05:24,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4373, Invalid=4557, Unknown=0, NotChecked=0, Total=8930 [2022-03-20 19:05:24,903 INFO L87 Difference]: Start difference. First operand 189 states and 191 transitions. Second operand has 91 states, 91 states have (on average 2.010989010989011) internal successors, (183), 90 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) [2022-03-20 19:05:26,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:05:26,811 INFO L93 Difference]: Finished difference Result 198 states and 202 transitions. [2022-03-20 19:05:26,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-03-20 19:05:26,811 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.010989010989011) internal successors, (183), 90 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 [2022-03-20 19:05:26,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:05:26,812 INFO L225 Difference]: With dead ends: 198 [2022-03-20 19:05:26,812 INFO L226 Difference]: Without dead ends: 191 [2022-03-20 19:05:26,813 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 553 GetRequests, 372 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3915 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=12733, Invalid=20573, Unknown=0, NotChecked=0, Total=33306 [2022-03-20 19:05:26,814 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 96 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:05:26,814 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 34 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:05:26,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-03-20 19:05:26,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2022-03-20 19:05:26,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.0161290322580645) internal successors, (189), 186 states have internal predecessors, (189), 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) [2022-03-20 19:05:26,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 193 transitions. [2022-03-20 19:05:26,819 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 193 transitions. Word has length 187 [2022-03-20 19:05:26,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:05:26,819 INFO L478 AbstractCegarLoop]: Abstraction has 191 states and 193 transitions. [2022-03-20 19:05:26,819 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.010989010989011) internal successors, (183), 90 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) [2022-03-20 19:05:26,819 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 193 transitions. [2022-03-20 19:05:26,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-03-20 19:05:26,820 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:05:26,820 INFO L499 BasicCegarLoop]: trace histogram [89, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:05:26,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-03-20 19:05:27,036 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 [2022-03-20 19:05:27,036 INFO L403 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:05:27,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:05:27,036 INFO L85 PathProgramCache]: Analyzing trace with hash -270548138, now seen corresponding path program 175 times [2022-03-20 19:05:27,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:05:27,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [244308824] [2022-03-20 19:05:27,186 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:05:27,187 INFO L85 PathProgramCache]: Analyzing trace with hash -302850480, now seen corresponding path program 1 times [2022-03-20 19:05:27,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:05:27,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237203508] [2022-03-20 19:05:27,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:05:27,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:05:27,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:05:27,189 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:05:27,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:05:27,191 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:05:27,191 INFO L85 PathProgramCache]: Analyzing trace with hash -270548138, now seen corresponding path program 176 times [2022-03-20 19:05:27,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:05:27,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900523202] [2022-03-20 19:05:27,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:05:27,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:05:27,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:05:28,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:05:28,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:05:28,632 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 89 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:05:28,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:05:28,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900523202] [2022-03-20 19:05:28,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900523202] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:05:28,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944974888] [2022-03-20 19:05:28,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:05:28,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:05:28,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:05:28,634 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) [2022-03-20 19:05:28,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-03-20 19:05:28,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:05:28,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:05:28,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 90 conjunts are in the unsatisfiable core [2022-03-20 19:05:28,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:05:28,876 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 89 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:05:28,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:05:33,118 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 89 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:05:33,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944974888] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:05:33,118 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:05:33,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 91, 91] total 182 [2022-03-20 19:05:33,118 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:05:33,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [244308824] [2022-03-20 19:05:33,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [244308824] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:05:33,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:05:33,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-03-20 19:05:33,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94822622] [2022-03-20 19:05:33,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:05:33,119 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-03-20 19:05:33,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:05:33,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-03-20 19:05:33,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16292, Invalid=16650, Unknown=0, NotChecked=0, Total=32942 [2022-03-20 19:05:33,121 INFO L87 Difference]: Start difference. First operand 191 states and 193 transitions. Second operand has 92 states, 92 states have (on average 2.010869565217391) internal successors, (185), 91 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) [2022-03-20 19:05:35,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:05:35,137 INFO L93 Difference]: Finished difference Result 200 states and 204 transitions. [2022-03-20 19:05:35,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-03-20 19:05:35,137 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.010869565217391) internal successors, (185), 91 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 [2022-03-20 19:05:35,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:05:35,138 INFO L225 Difference]: With dead ends: 200 [2022-03-20 19:05:35,138 INFO L226 Difference]: Without dead ends: 193 [2022-03-20 19:05:35,141 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 559 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4443 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=32402, Invalid=40768, Unknown=0, NotChecked=0, Total=73170 [2022-03-20 19:05:35,142 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 97 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:05:35,142 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 19 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:05:35,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-03-20 19:05:35,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2022-03-20 19:05:35,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.0159574468085106) internal successors, (191), 188 states have internal predecessors, (191), 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) [2022-03-20 19:05:35,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 195 transitions. [2022-03-20 19:05:35,147 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 195 transitions. Word has length 189 [2022-03-20 19:05:35,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:05:35,147 INFO L478 AbstractCegarLoop]: Abstraction has 193 states and 195 transitions. [2022-03-20 19:05:35,147 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.010869565217391) internal successors, (185), 91 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) [2022-03-20 19:05:35,147 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 195 transitions. [2022-03-20 19:05:35,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-03-20 19:05:35,149 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:05:35,149 INFO L499 BasicCegarLoop]: trace histogram [90, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:05:35,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-03-20 19:05:35,363 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 [2022-03-20 19:05:35,364 INFO L403 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:05:35,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:05:35,364 INFO L85 PathProgramCache]: Analyzing trace with hash -386338445, now seen corresponding path program 177 times [2022-03-20 19:05:35,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:05:35,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1440797893] [2022-03-20 19:05:35,529 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:05:35,529 INFO L85 PathProgramCache]: Analyzing trace with hash -243745136, now seen corresponding path program 1 times [2022-03-20 19:05:35,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:05:35,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304827220] [2022-03-20 19:05:35,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:05:35,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:05:35,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:05:35,531 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:05:35,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:05:35,532 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:05:35,532 INFO L85 PathProgramCache]: Analyzing trace with hash -386338445, now seen corresponding path program 178 times [2022-03-20 19:05:35,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:05:35,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002365999] [2022-03-20 19:05:35,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:05:35,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:05:35,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:05:37,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:05:37,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:05:37,034 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 90 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:05:37,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:05:37,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002365999] [2022-03-20 19:05:37,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002365999] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:05:37,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909066931] [2022-03-20 19:05:37,034 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:05:37,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:05:37,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:05:37,035 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) [2022-03-20 19:05:37,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-03-20 19:05:37,089 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:05:37,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:05:37,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 91 conjunts are in the unsatisfiable core [2022-03-20 19:05:37,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:05:37,265 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 90 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:05:37,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:05:41,779 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 90 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:05:41,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909066931] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:05:41,779 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:05:41,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 92, 92] total 184 [2022-03-20 19:05:41,780 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:05:41,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1440797893] [2022-03-20 19:05:41,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1440797893] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:05:41,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:05:41,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-03-20 19:05:41,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112042926] [2022-03-20 19:05:41,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:05:41,780 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-03-20 19:05:41,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:05:41,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-03-20 19:05:41,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16655, Invalid=17017, Unknown=0, NotChecked=0, Total=33672 [2022-03-20 19:05:41,782 INFO L87 Difference]: Start difference. First operand 193 states and 195 transitions. Second operand has 93 states, 93 states have (on average 2.010752688172043) internal successors, (187), 92 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) [2022-03-20 19:05:43,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:05:43,805 INFO L93 Difference]: Finished difference Result 202 states and 206 transitions. [2022-03-20 19:05:43,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-03-20 19:05:43,805 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.010752688172043) internal successors, (187), 92 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 [2022-03-20 19:05:43,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:05:43,805 INFO L225 Difference]: With dead ends: 202 [2022-03-20 19:05:43,805 INFO L226 Difference]: Without dead ends: 195 [2022-03-20 19:05:43,808 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 565 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 272 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4538 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=33126, Invalid=41676, Unknown=0, NotChecked=0, Total=74802 [2022-03-20 19:05:43,808 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 98 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:05:43,808 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 39 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:05:43,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-03-20 19:05:43,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2022-03-20 19:05:43,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 190 states have (on average 1.0157894736842106) internal successors, (193), 190 states have internal predecessors, (193), 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) [2022-03-20 19:05:43,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 197 transitions. [2022-03-20 19:05:43,814 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 197 transitions. Word has length 191 [2022-03-20 19:05:43,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:05:43,814 INFO L478 AbstractCegarLoop]: Abstraction has 195 states and 197 transitions. [2022-03-20 19:05:43,814 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 2.010752688172043) internal successors, (187), 92 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) [2022-03-20 19:05:43,814 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 197 transitions. [2022-03-20 19:05:43,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-03-20 19:05:43,821 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:05:43,821 INFO L499 BasicCegarLoop]: trace histogram [91, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:05:43,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-03-20 19:05:44,036 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 [2022-03-20 19:05:44,037 INFO L403 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:05:44,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:05:44,037 INFO L85 PathProgramCache]: Analyzing trace with hash 8326224, now seen corresponding path program 179 times [2022-03-20 19:05:44,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:05:44,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [620262862] [2022-03-20 19:05:44,198 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:05:44,198 INFO L85 PathProgramCache]: Analyzing trace with hash -184639792, now seen corresponding path program 1 times [2022-03-20 19:05:44,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:05:44,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136636024] [2022-03-20 19:05:44,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:05:44,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:05:44,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:05:44,200 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:05:44,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:05:44,206 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:05:44,206 INFO L85 PathProgramCache]: Analyzing trace with hash 8326224, now seen corresponding path program 180 times [2022-03-20 19:05:44,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:05:44,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49066905] [2022-03-20 19:05:44,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:05:44,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:05:44,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:05:46,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:05:46,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:05:46,100 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 91 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:05:46,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:05:46,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49066905] [2022-03-20 19:05:46,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49066905] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:05:46,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264298254] [2022-03-20 19:05:46,101 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 19:05:46,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:05:46,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:05:46,102 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) [2022-03-20 19:05:46,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-03-20 19:05:46,130 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 19:05:46,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:05:46,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 19:05:46,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:05:46,465 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 270 proven. 1 refuted. 0 times theorem prover too weak. 8010 trivial. 0 not checked. [2022-03-20 19:05:46,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:05:46,733 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 270 proven. 1 refuted. 0 times theorem prover too weak. 8010 trivial. 0 not checked. [2022-03-20 19:05:46,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264298254] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:05:46,733 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:05:46,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 4, 4] total 98 [2022-03-20 19:05:46,733 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:05:46,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [620262862] [2022-03-20 19:05:46,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [620262862] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:05:46,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:05:46,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-03-20 19:05:46,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703662388] [2022-03-20 19:05:46,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:05:46,734 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-03-20 19:05:46,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:05:46,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-03-20 19:05:46,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-03-20 19:05:46,736 INFO L87 Difference]: Start difference. First operand 195 states and 197 transitions. Second operand has 94 states, 94 states have (on average 2.0106382978723403) internal successors, (189), 93 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) [2022-03-20 19:05:49,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:05:49,537 INFO L93 Difference]: Finished difference Result 204 states and 208 transitions. [2022-03-20 19:05:49,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-03-20 19:05:49,537 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.0106382978723403) internal successors, (189), 93 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 [2022-03-20 19:05:49,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:05:49,538 INFO L225 Difference]: With dead ends: 204 [2022-03-20 19:05:49,538 INFO L226 Difference]: Without dead ends: 197 [2022-03-20 19:05:49,539 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 571 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4185 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=13576, Invalid=21956, Unknown=0, NotChecked=0, Total=35532 [2022-03-20 19:05:49,539 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 99 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:05:49,539 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 39 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:05:49,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-03-20 19:05:49,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2022-03-20 19:05:49,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 192 states have (on average 1.015625) internal successors, (195), 192 states have internal predecessors, (195), 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) [2022-03-20 19:05:49,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 199 transitions. [2022-03-20 19:05:49,545 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 199 transitions. Word has length 193 [2022-03-20 19:05:49,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:05:49,545 INFO L478 AbstractCegarLoop]: Abstraction has 197 states and 199 transitions. [2022-03-20 19:05:49,545 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.0106382978723403) internal successors, (189), 93 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) [2022-03-20 19:05:49,545 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 199 transitions. [2022-03-20 19:05:49,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-03-20 19:05:49,546 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:05:49,546 INFO L499 BasicCegarLoop]: trace histogram [92, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:05:49,571 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-03-20 19:05:49,762 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 [2022-03-20 19:05:49,763 INFO L403 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:05:49,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:05:49,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1323951085, now seen corresponding path program 181 times [2022-03-20 19:05:49,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:05:49,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [226871692] [2022-03-20 19:05:49,916 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:05:49,917 INFO L85 PathProgramCache]: Analyzing trace with hash -125534448, now seen corresponding path program 1 times [2022-03-20 19:05:49,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:05:49,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500036127] [2022-03-20 19:05:49,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:05:49,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:05:49,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:05:49,919 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:05:49,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:05:49,920 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:05:49,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1323951085, now seen corresponding path program 182 times [2022-03-20 19:05:49,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:05:49,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897145732] [2022-03-20 19:05:49,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:05:49,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:05:49,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:05:51,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:05:51,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:05:51,471 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 92 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:05:51,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:05:51,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897145732] [2022-03-20 19:05:51,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897145732] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:05:51,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692949356] [2022-03-20 19:05:51,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:05:51,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:05:51,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:05:51,472 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) [2022-03-20 19:05:51,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-03-20 19:05:51,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:05:51,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:05:51,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 93 conjunts are in the unsatisfiable core [2022-03-20 19:05:51,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:05:51,700 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 92 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:05:51,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:05:58,952 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 92 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:05:58,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692949356] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:05:58,952 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:05:58,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 94, 94] total 188 [2022-03-20 19:05:58,952 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:05:58,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [226871692] [2022-03-20 19:05:58,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [226871692] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:05:58,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:05:58,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-03-20 19:05:58,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385480131] [2022-03-20 19:05:58,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:05:58,953 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-03-20 19:05:58,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:05:58,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-03-20 19:05:58,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17393, Invalid=17763, Unknown=0, NotChecked=0, Total=35156 [2022-03-20 19:05:58,954 INFO L87 Difference]: Start difference. First operand 197 states and 199 transitions. Second operand has 95 states, 95 states have (on average 2.0105263157894737) internal successors, (191), 94 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) [2022-03-20 19:06:01,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:06:01,526 INFO L93 Difference]: Finished difference Result 206 states and 210 transitions. [2022-03-20 19:06:01,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-03-20 19:06:01,526 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.0105263157894737) internal successors, (191), 94 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 [2022-03-20 19:06:01,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:06:01,526 INFO L225 Difference]: With dead ends: 206 [2022-03-20 19:06:01,527 INFO L226 Difference]: Without dead ends: 199 [2022-03-20 19:06:01,530 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 577 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 278 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4731 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=34598, Invalid=43522, Unknown=0, NotChecked=0, Total=78120 [2022-03-20 19:06:01,530 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 100 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:06:01,530 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 54 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:06:01,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-03-20 19:06:01,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2022-03-20 19:06:01,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 194 states have (on average 1.0154639175257731) internal successors, (197), 194 states have internal predecessors, (197), 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) [2022-03-20 19:06:01,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 201 transitions. [2022-03-20 19:06:01,537 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 201 transitions. Word has length 195 [2022-03-20 19:06:01,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:06:01,537 INFO L478 AbstractCegarLoop]: Abstraction has 199 states and 201 transitions. [2022-03-20 19:06:01,537 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.0105263157894737) internal successors, (191), 94 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) [2022-03-20 19:06:01,538 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 201 transitions. [2022-03-20 19:06:01,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-03-20 19:06:01,538 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:06:01,538 INFO L499 BasicCegarLoop]: trace histogram [93, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:06:01,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-03-20 19:06:01,751 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 [2022-03-20 19:06:01,751 INFO L403 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:06:01,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:06:01,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1375909814, now seen corresponding path program 183 times [2022-03-20 19:06:01,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:06:01,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1275442043] [2022-03-20 19:06:01,886 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:06:01,886 INFO L85 PathProgramCache]: Analyzing trace with hash -66429104, now seen corresponding path program 1 times [2022-03-20 19:06:01,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:06:01,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699257228] [2022-03-20 19:06:01,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:06:01,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:06:01,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:06:01,888 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:06:01,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:06:01,889 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:06:01,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1375909814, now seen corresponding path program 184 times [2022-03-20 19:06:01,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:06:01,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198411595] [2022-03-20 19:06:01,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:06:01,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:06:01,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:06:03,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:06:03,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:06:03,658 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 93 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:06:03,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:06:03,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198411595] [2022-03-20 19:06:03,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198411595] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:06:03,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711418365] [2022-03-20 19:06:03,658 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:06:03,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:06:03,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:06:03,659 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) [2022-03-20 19:06:03,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-03-20 19:06:03,721 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:06:03,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:06:03,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 94 conjunts are in the unsatisfiable core [2022-03-20 19:06:03,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:06:03,882 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 93 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:06:03,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:06:10,234 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 93 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:06:10,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711418365] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:06:10,234 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:06:10,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 95, 95] total 190 [2022-03-20 19:06:10,234 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:06:10,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1275442043] [2022-03-20 19:06:10,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1275442043] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:06:10,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:06:10,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-03-20 19:06:10,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131721114] [2022-03-20 19:06:10,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:06:10,235 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-03-20 19:06:10,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:06:10,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-03-20 19:06:10,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17768, Invalid=18142, Unknown=0, NotChecked=0, Total=35910 [2022-03-20 19:06:10,237 INFO L87 Difference]: Start difference. First operand 199 states and 201 transitions. Second operand has 96 states, 96 states have (on average 2.0104166666666665) internal successors, (193), 95 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) [2022-03-20 19:06:13,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:06:13,027 INFO L93 Difference]: Finished difference Result 208 states and 212 transitions. [2022-03-20 19:06:13,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-03-20 19:06:13,028 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.0104166666666665) internal successors, (193), 95 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 [2022-03-20 19:06:13,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:06:13,028 INFO L225 Difference]: With dead ends: 208 [2022-03-20 19:06:13,028 INFO L226 Difference]: Without dead ends: 201 [2022-03-20 19:06:13,031 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 583 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 281 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4829 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=35346, Invalid=44460, Unknown=0, NotChecked=0, Total=79806 [2022-03-20 19:06:13,032 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 101 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:06:13,032 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 29 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:06:13,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-03-20 19:06:13,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2022-03-20 19:06:13,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 196 states have (on average 1.0153061224489797) internal successors, (199), 196 states have internal predecessors, (199), 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) [2022-03-20 19:06:13,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 203 transitions. [2022-03-20 19:06:13,037 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 203 transitions. Word has length 197 [2022-03-20 19:06:13,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:06:13,037 INFO L478 AbstractCegarLoop]: Abstraction has 201 states and 203 transitions. [2022-03-20 19:06:13,037 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.0104166666666665) internal successors, (193), 95 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) [2022-03-20 19:06:13,037 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 203 transitions. [2022-03-20 19:06:13,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-03-20 19:06:13,038 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:06:13,038 INFO L499 BasicCegarLoop]: trace histogram [94, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:06:13,054 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-03-20 19:06:13,253 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 [2022-03-20 19:06:13,253 INFO L403 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:06:13,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:06:13,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1781986969, now seen corresponding path program 185 times [2022-03-20 19:06:13,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:06:13,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [786328912] [2022-03-20 19:06:13,432 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:06:13,432 INFO L85 PathProgramCache]: Analyzing trace with hash -7323760, now seen corresponding path program 1 times [2022-03-20 19:06:13,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:06:13,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821693599] [2022-03-20 19:06:13,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:06:13,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:06:13,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:06:13,434 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:06:13,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:06:13,436 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:06:13,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1781986969, now seen corresponding path program 186 times [2022-03-20 19:06:13,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:06:13,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745992647] [2022-03-20 19:06:13,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:06:13,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:06:13,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:06:14,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:06:14,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:06:14,969 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 94 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:06:14,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:06:14,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745992647] [2022-03-20 19:06:14,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745992647] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:06:14,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742779054] [2022-03-20 19:06:14,969 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 19:06:14,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:06:14,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:06:14,970 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) [2022-03-20 19:06:14,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-03-20 19:06:14,998 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 19:06:14,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:06:14,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 19:06:14,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:06:15,162 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 279 proven. 1 refuted. 0 times theorem prover too weak. 8556 trivial. 0 not checked. [2022-03-20 19:06:15,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:06:15,313 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 279 proven. 1 refuted. 0 times theorem prover too weak. 8556 trivial. 0 not checked. [2022-03-20 19:06:15,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742779054] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:06:15,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:06:15,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 4, 4] total 101 [2022-03-20 19:06:15,314 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:06:15,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [786328912] [2022-03-20 19:06:15,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [786328912] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:06:15,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:06:15,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-03-20 19:06:15,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599879408] [2022-03-20 19:06:15,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:06:15,314 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-03-20 19:06:15,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:06:15,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-03-20 19:06:15,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4952, Invalid=5148, Unknown=0, NotChecked=0, Total=10100 [2022-03-20 19:06:15,315 INFO L87 Difference]: Start difference. First operand 201 states and 203 transitions. Second operand has 97 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 96 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) [2022-03-20 19:06:17,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:06:17,411 INFO L93 Difference]: Finished difference Result 210 states and 214 transitions. [2022-03-20 19:06:17,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-03-20 19:06:17,412 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 96 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 [2022-03-20 19:06:17,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:06:17,412 INFO L225 Difference]: With dead ends: 210 [2022-03-20 19:06:17,412 INFO L226 Difference]: Without dead ends: 203 [2022-03-20 19:06:17,414 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 589 GetRequests, 396 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4464 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=14446, Invalid=23384, Unknown=0, NotChecked=0, Total=37830 [2022-03-20 19:06:17,414 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 102 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:06:17,414 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 49 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:06:17,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-03-20 19:06:17,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2022-03-20 19:06:17,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 198 states have (on average 1.0151515151515151) internal successors, (201), 198 states have internal predecessors, (201), 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) [2022-03-20 19:06:17,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 205 transitions. [2022-03-20 19:06:17,420 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 205 transitions. Word has length 199 [2022-03-20 19:06:17,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:06:17,420 INFO L478 AbstractCegarLoop]: Abstraction has 203 states and 205 transitions. [2022-03-20 19:06:17,420 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 96 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) [2022-03-20 19:06:17,420 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 205 transitions. [2022-03-20 19:06:17,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-03-20 19:06:17,420 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:06:17,421 INFO L499 BasicCegarLoop]: trace histogram [95, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:06:17,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-03-20 19:06:17,636 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 [2022-03-20 19:06:17,636 INFO L403 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:06:17,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:06:17,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1180108988, now seen corresponding path program 187 times [2022-03-20 19:06:17,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:06:17,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [310791629] [2022-03-20 19:06:17,791 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:06:17,791 INFO L85 PathProgramCache]: Analyzing trace with hash 51781584, now seen corresponding path program 1 times [2022-03-20 19:06:17,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:06:17,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167726719] [2022-03-20 19:06:17,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:06:17,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:06:17,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:06:17,793 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:06:17,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:06:17,795 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:06:17,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1180108988, now seen corresponding path program 188 times [2022-03-20 19:06:17,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:06:17,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849035325] [2022-03-20 19:06:17,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:06:17,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:06:17,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:06:19,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:06:19,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:06:19,415 INFO L134 CoverageAnalysis]: Checked inductivity of 9025 backedges. 95 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:06:19,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:06:19,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849035325] [2022-03-20 19:06:19,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849035325] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:06:19,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396443675] [2022-03-20 19:06:19,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:06:19,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:06:19,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:06:19,417 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) [2022-03-20 19:06:19,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-03-20 19:06:19,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:06:19,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:06:19,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 96 conjunts are in the unsatisfiable core [2022-03-20 19:06:19,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:06:19,640 INFO L134 CoverageAnalysis]: Checked inductivity of 9025 backedges. 95 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:06:19,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:06:24,754 INFO L134 CoverageAnalysis]: Checked inductivity of 9025 backedges. 95 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:06:24,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396443675] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:06:24,755 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:06:24,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 97, 97] total 194 [2022-03-20 19:06:24,755 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:06:24,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [310791629] [2022-03-20 19:06:24,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [310791629] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:06:24,755 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:06:24,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-03-20 19:06:24,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200866353] [2022-03-20 19:06:24,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:06:24,756 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-03-20 19:06:24,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:06:24,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-03-20 19:06:24,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18530, Invalid=18912, Unknown=0, NotChecked=0, Total=37442 [2022-03-20 19:06:24,758 INFO L87 Difference]: Start difference. First operand 203 states and 205 transitions. Second operand has 98 states, 98 states have (on average 2.010204081632653) internal successors, (197), 97 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) [2022-03-20 19:06:27,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:06:27,921 INFO L93 Difference]: Finished difference Result 212 states and 216 transitions. [2022-03-20 19:06:27,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-03-20 19:06:27,921 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.010204081632653) internal successors, (197), 97 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 [2022-03-20 19:06:27,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:06:27,922 INFO L225 Difference]: With dead ends: 212 [2022-03-20 19:06:27,922 INFO L226 Difference]: Without dead ends: 205 [2022-03-20 19:06:27,924 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 595 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5028 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=36866, Invalid=46366, Unknown=0, NotChecked=0, Total=83232 [2022-03-20 19:06:27,925 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 103 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:06:27,925 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 34 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:06:27,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-03-20 19:06:27,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2022-03-20 19:06:27,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 200 states have (on average 1.015) internal successors, (203), 200 states have internal predecessors, (203), 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) [2022-03-20 19:06:27,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 207 transitions. [2022-03-20 19:06:27,931 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 207 transitions. Word has length 201 [2022-03-20 19:06:27,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:06:27,931 INFO L478 AbstractCegarLoop]: Abstraction has 205 states and 207 transitions. [2022-03-20 19:06:27,931 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.010204081632653) internal successors, (197), 97 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) [2022-03-20 19:06:27,931 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 207 transitions. [2022-03-20 19:06:27,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-03-20 19:06:27,932 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:06:27,932 INFO L499 BasicCegarLoop]: trace histogram [96, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:06:27,949 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-03-20 19:06:28,139 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 [2022-03-20 19:06:28,139 INFO L403 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:06:28,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:06:28,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1699013089, now seen corresponding path program 189 times [2022-03-20 19:06:28,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:06:28,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1844835692] [2022-03-20 19:06:28,300 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:06:28,301 INFO L85 PathProgramCache]: Analyzing trace with hash 110886928, now seen corresponding path program 1 times [2022-03-20 19:06:28,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:06:28,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559121894] [2022-03-20 19:06:28,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:06:28,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:06:28,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:06:28,303 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:06:28,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:06:28,304 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:06:28,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1699013089, now seen corresponding path program 190 times [2022-03-20 19:06:28,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:06:28,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708454238] [2022-03-20 19:06:28,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:06:28,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:06:28,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:06:31,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:06:31,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:06:31,075 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 96 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:06:31,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:06:31,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708454238] [2022-03-20 19:06:31,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708454238] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:06:31,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614073852] [2022-03-20 19:06:31,076 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:06:31,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:06:31,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:06:31,077 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) [2022-03-20 19:06:31,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-03-20 19:06:31,136 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:06:31,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:06:31,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 97 conjunts are in the unsatisfiable core [2022-03-20 19:06:31,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:06:31,368 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 96 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:06:31,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:06:37,369 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 96 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:06:37,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614073852] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:06:37,369 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:06:37,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 98, 98] total 196 [2022-03-20 19:06:37,370 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:06:37,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1844835692] [2022-03-20 19:06:37,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1844835692] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:06:37,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:06:37,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-03-20 19:06:37,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810199465] [2022-03-20 19:06:37,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:06:37,370 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-03-20 19:06:37,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:06:37,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-03-20 19:06:37,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18917, Invalid=19303, Unknown=0, NotChecked=0, Total=38220 [2022-03-20 19:06:37,373 INFO L87 Difference]: Start difference. First operand 205 states and 207 transitions. Second operand has 99 states, 99 states have (on average 2.01010101010101) internal successors, (199), 98 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) [2022-03-20 19:06:39,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:06:39,618 INFO L93 Difference]: Finished difference Result 214 states and 218 transitions. [2022-03-20 19:06:39,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-03-20 19:06:39,618 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.01010101010101) internal successors, (199), 98 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 [2022-03-20 19:06:39,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:06:39,619 INFO L225 Difference]: With dead ends: 214 [2022-03-20 19:06:39,620 INFO L226 Difference]: Without dead ends: 207 [2022-03-20 19:06:39,622 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 601 GetRequests, 311 SyntacticMatches, 0 SemanticMatches, 290 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5129 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=37638, Invalid=47334, Unknown=0, NotChecked=0, Total=84972 [2022-03-20 19:06:39,622 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 104 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:06:39,622 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 49 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:06:39,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-03-20 19:06:39,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2022-03-20 19:06:39,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 202 states have (on average 1.0148514851485149) internal successors, (205), 202 states have internal predecessors, (205), 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) [2022-03-20 19:06:39,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 209 transitions. [2022-03-20 19:06:39,652 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 209 transitions. Word has length 203 [2022-03-20 19:06:39,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:06:39,652 INFO L478 AbstractCegarLoop]: Abstraction has 207 states and 209 transitions. [2022-03-20 19:06:39,653 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.01010101010101) internal successors, (199), 98 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) [2022-03-20 19:06:39,653 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 209 transitions. [2022-03-20 19:06:39,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-03-20 19:06:39,653 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:06:39,653 INFO L499 BasicCegarLoop]: trace histogram [97, 96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:06:39,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-03-20 19:06:39,853 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 [2022-03-20 19:06:39,854 INFO L403 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:06:39,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:06:39,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1718576834, now seen corresponding path program 191 times [2022-03-20 19:06:39,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:06:39,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [301357365] [2022-03-20 19:06:40,067 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:06:40,067 INFO L85 PathProgramCache]: Analyzing trace with hash 169992272, now seen corresponding path program 1 times [2022-03-20 19:06:40,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:06:40,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581799772] [2022-03-20 19:06:40,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:06:40,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:06:40,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:06:40,072 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:06:40,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:06:40,075 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:06:40,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1718576834, now seen corresponding path program 192 times [2022-03-20 19:06:40,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:06:40,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345170255] [2022-03-20 19:06:40,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:06:40,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:06:40,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:06:41,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:06:41,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:06:41,700 INFO L134 CoverageAnalysis]: Checked inductivity of 9409 backedges. 97 proven. 9312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:06:41,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:06:41,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345170255] [2022-03-20 19:06:41,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345170255] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:06:41,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540999011] [2022-03-20 19:06:41,700 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 19:06:41,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:06:41,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:06:41,701 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) [2022-03-20 19:06:41,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-03-20 19:06:41,729 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 19:06:41,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:06:41,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 19:06:41,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:06:41,901 INFO L134 CoverageAnalysis]: Checked inductivity of 9409 backedges. 288 proven. 1 refuted. 0 times theorem prover too weak. 9120 trivial. 0 not checked. [2022-03-20 19:06:41,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:06:42,054 INFO L134 CoverageAnalysis]: Checked inductivity of 9409 backedges. 288 proven. 1 refuted. 0 times theorem prover too weak. 9120 trivial. 0 not checked. [2022-03-20 19:06:42,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540999011] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:06:42,055 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:06:42,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 4, 4] total 104 [2022-03-20 19:06:42,055 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:06:42,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [301357365] [2022-03-20 19:06:42,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [301357365] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:06:42,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:06:42,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-03-20 19:06:42,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316465438] [2022-03-20 19:06:42,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:06:42,055 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-03-20 19:06:42,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:06:42,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-03-20 19:06:42,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 19:06:42,057 INFO L87 Difference]: Start difference. First operand 207 states and 209 transitions. Second operand has 100 states, 100 states have (on average 2.01) internal successors, (201), 99 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) [2022-03-20 19:06:44,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:06:44,192 INFO L93 Difference]: Finished difference Result 216 states and 220 transitions. [2022-03-20 19:06:44,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-03-20 19:06:44,192 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.01) internal successors, (201), 99 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 [2022-03-20 19:06:44,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:06:44,193 INFO L225 Difference]: With dead ends: 216 [2022-03-20 19:06:44,193 INFO L226 Difference]: Without dead ends: 209 [2022-03-20 19:06:44,195 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 408 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4752 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=15343, Invalid=24857, Unknown=0, NotChecked=0, Total=40200 [2022-03-20 19:06:44,195 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 105 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:06:44,195 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 34 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:06:44,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-03-20 19:06:44,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2022-03-20 19:06:44,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.0147058823529411) internal successors, (207), 204 states have internal predecessors, (207), 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) [2022-03-20 19:06:44,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 211 transitions. [2022-03-20 19:06:44,201 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 211 transitions. Word has length 205 [2022-03-20 19:06:44,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:06:44,201 INFO L478 AbstractCegarLoop]: Abstraction has 209 states and 211 transitions. [2022-03-20 19:06:44,201 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.01) internal successors, (201), 99 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) [2022-03-20 19:06:44,201 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 211 transitions. [2022-03-20 19:06:44,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-03-20 19:06:44,202 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:06:44,202 INFO L499 BasicCegarLoop]: trace histogram [98, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:06:44,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-03-20 19:06:44,407 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 [2022-03-20 19:06:44,407 INFO L403 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:06:44,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:06:44,408 INFO L85 PathProgramCache]: Analyzing trace with hash -372511397, now seen corresponding path program 193 times [2022-03-20 19:06:44,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:06:44,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1089717933] [2022-03-20 19:06:44,683 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:06:44,684 INFO L85 PathProgramCache]: Analyzing trace with hash 229097616, now seen corresponding path program 1 times [2022-03-20 19:06:44,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:06:44,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524017979] [2022-03-20 19:06:44,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:06:44,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:06:44,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:06:44,686 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:06:44,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:06:44,687 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:06:44,687 INFO L85 PathProgramCache]: Analyzing trace with hash -372511397, now seen corresponding path program 194 times [2022-03-20 19:06:44,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:06:44,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873562076] [2022-03-20 19:06:44,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:06:44,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:06:44,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:06:46,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:06:46,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:06:46,348 INFO L134 CoverageAnalysis]: Checked inductivity of 9604 backedges. 98 proven. 9506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:06:46,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:06:46,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873562076] [2022-03-20 19:06:46,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873562076] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:06:46,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544314534] [2022-03-20 19:06:46,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:06:46,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:06:46,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:06:46,360 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) [2022-03-20 19:06:46,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-03-20 19:06:46,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:06:46,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:06:46,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 99 conjunts are in the unsatisfiable core [2022-03-20 19:06:46,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:06:46,583 INFO L134 CoverageAnalysis]: Checked inductivity of 9604 backedges. 98 proven. 9506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:06:46,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:06:51,528 INFO L134 CoverageAnalysis]: Checked inductivity of 9604 backedges. 98 proven. 9506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:06:51,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544314534] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:06:51,529 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:06:51,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 100, 100] total 200 [2022-03-20 19:06:51,529 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:06:51,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1089717933] [2022-03-20 19:06:51,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1089717933] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:06:51,529 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:06:51,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-03-20 19:06:51,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738514053] [2022-03-20 19:06:51,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:06:51,529 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-03-20 19:06:51,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:06:51,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-03-20 19:06:51,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19703, Invalid=20097, Unknown=0, NotChecked=0, Total=39800 [2022-03-20 19:06:51,532 INFO L87 Difference]: Start difference. First operand 209 states and 211 transitions. Second operand has 101 states, 101 states have (on average 2.00990099009901) internal successors, (203), 100 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) [2022-03-20 19:06:53,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:06:53,815 INFO L93 Difference]: Finished difference Result 218 states and 222 transitions. [2022-03-20 19:06:53,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-03-20 19:06:53,815 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.00990099009901) internal successors, (203), 100 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 [2022-03-20 19:06:53,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:06:53,816 INFO L225 Difference]: With dead ends: 218 [2022-03-20 19:06:53,816 INFO L226 Difference]: Without dead ends: 211 [2022-03-20 19:06:53,818 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 613 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 296 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5334 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=39206, Invalid=49300, Unknown=0, NotChecked=0, Total=88506 [2022-03-20 19:06:53,818 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 106 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:06:53,819 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 49 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:06:53,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-03-20 19:06:53,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2022-03-20 19:06:53,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 206 states have (on average 1.0145631067961165) internal successors, (209), 206 states have internal predecessors, (209), 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) [2022-03-20 19:06:53,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 213 transitions. [2022-03-20 19:06:53,824 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 213 transitions. Word has length 207 [2022-03-20 19:06:53,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:06:53,824 INFO L478 AbstractCegarLoop]: Abstraction has 211 states and 213 transitions. [2022-03-20 19:06:53,824 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.00990099009901) internal successors, (203), 100 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) [2022-03-20 19:06:53,824 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 213 transitions. [2022-03-20 19:06:53,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-03-20 19:06:53,825 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:06:53,825 INFO L499 BasicCegarLoop]: trace histogram [99, 98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:06:53,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-03-20 19:06:54,039 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 [2022-03-20 19:06:54,039 INFO L403 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:06:54,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:06:54,039 INFO L85 PathProgramCache]: Analyzing trace with hash 411217464, now seen corresponding path program 195 times [2022-03-20 19:06:54,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:06:54,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1284206408] [2022-03-20 19:06:54,211 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:06:54,212 INFO L85 PathProgramCache]: Analyzing trace with hash 288202960, now seen corresponding path program 1 times [2022-03-20 19:06:54,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:06:54,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929327615] [2022-03-20 19:06:54,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:06:54,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:06:54,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:06:54,214 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:06:54,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:06:54,215 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:06:54,215 INFO L85 PathProgramCache]: Analyzing trace with hash 411217464, now seen corresponding path program 196 times [2022-03-20 19:06:54,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:06:54,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412038036] [2022-03-20 19:06:54,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:06:54,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:06:54,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:06:55,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:06:55,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:06:55,940 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 99 proven. 9702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:06:55,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:06:55,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412038036] [2022-03-20 19:06:55,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412038036] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:06:55,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120050390] [2022-03-20 19:06:55,940 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:06:55,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:06:55,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:06:55,941 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) [2022-03-20 19:06:55,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-03-20 19:06:55,996 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:06:55,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:06:55,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 100 conjunts are in the unsatisfiable core [2022-03-20 19:06:55,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:06:56,287 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 99 proven. 9702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:06:56,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:07:02,766 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 99 proven. 9702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:07:02,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120050390] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:07:02,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:07:02,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 101, 101] total 202 [2022-03-20 19:07:02,766 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:07:02,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1284206408] [2022-03-20 19:07:02,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1284206408] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:07:02,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:07:02,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-03-20 19:07:02,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941427133] [2022-03-20 19:07:02,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:07:02,767 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-03-20 19:07:02,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:07:02,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-03-20 19:07:02,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20102, Invalid=20500, Unknown=0, NotChecked=0, Total=40602 [2022-03-20 19:07:02,770 INFO L87 Difference]: Start difference. First operand 211 states and 213 transitions. Second operand has 102 states, 102 states have (on average 2.0098039215686274) internal successors, (205), 101 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) [2022-03-20 19:07:05,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:07:05,263 INFO L93 Difference]: Finished difference Result 220 states and 224 transitions. [2022-03-20 19:07:05,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-03-20 19:07:05,264 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.0098039215686274) internal successors, (205), 101 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 [2022-03-20 19:07:05,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:07:05,265 INFO L225 Difference]: With dead ends: 220 [2022-03-20 19:07:05,265 INFO L226 Difference]: Without dead ends: 213 [2022-03-20 19:07:05,269 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 619 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 299 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5438 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=40002, Invalid=50298, Unknown=0, NotChecked=0, Total=90300 [2022-03-20 19:07:05,269 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 107 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:07:05,269 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 24 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:07:05,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-03-20 19:07:05,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2022-03-20 19:07:05,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 208 states have (on average 1.0144230769230769) internal successors, (211), 208 states have internal predecessors, (211), 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) [2022-03-20 19:07:05,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 215 transitions. [2022-03-20 19:07:05,274 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 215 transitions. Word has length 209 [2022-03-20 19:07:05,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:07:05,275 INFO L478 AbstractCegarLoop]: Abstraction has 213 states and 215 transitions. [2022-03-20 19:07:05,275 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 2.0098039215686274) internal successors, (205), 101 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) [2022-03-20 19:07:05,275 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 215 transitions. [2022-03-20 19:07:05,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-03-20 19:07:05,275 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:07:05,275 INFO L499 BasicCegarLoop]: trace histogram [100, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:07:05,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-03-20 19:07:05,491 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 [2022-03-20 19:07:05,492 INFO L403 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:07:05,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:07:05,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1955376085, now seen corresponding path program 197 times [2022-03-20 19:07:05,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:07:05,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1044139866] [2022-03-20 19:07:05,651 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:07:05,652 INFO L85 PathProgramCache]: Analyzing trace with hash 347308304, now seen corresponding path program 1 times [2022-03-20 19:07:05,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:07:05,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504049917] [2022-03-20 19:07:05,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:07:05,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:07:05,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:07:05,654 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:07:05,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:07:05,655 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:07:05,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1955376085, now seen corresponding path program 198 times [2022-03-20 19:07:05,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:07:05,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141921861] [2022-03-20 19:07:05,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:07:05,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:07:05,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:07:08,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:07:08,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:07:08,277 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 100 proven. 9900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:07:08,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:07:08,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141921861] [2022-03-20 19:07:08,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141921861] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:07:08,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792351507] [2022-03-20 19:07:08,278 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 19:07:08,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:07:08,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:07:08,279 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) [2022-03-20 19:07:08,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-03-20 19:07:08,311 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 19:07:08,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:07:08,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 19:07:08,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:07:08,629 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 297 proven. 1 refuted. 0 times theorem prover too weak. 9702 trivial. 0 not checked. [2022-03-20 19:07:08,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:07:08,897 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 297 proven. 1 refuted. 0 times theorem prover too weak. 9702 trivial. 0 not checked. [2022-03-20 19:07:08,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792351507] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:07:08,897 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:07:08,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 4, 4] total 107 [2022-03-20 19:07:08,897 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:07:08,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1044139866] [2022-03-20 19:07:08,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1044139866] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:07:08,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:07:08,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-03-20 19:07:08,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493927784] [2022-03-20 19:07:08,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:07:08,898 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-03-20 19:07:08,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:07:08,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-03-20 19:07:08,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5567, Invalid=5775, Unknown=0, NotChecked=0, Total=11342 [2022-03-20 19:07:08,899 INFO L87 Difference]: Start difference. First operand 213 states and 215 transitions. Second operand has 103 states, 103 states have (on average 2.0097087378640777) internal successors, (207), 102 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) [2022-03-20 19:07:12,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:07:12,327 INFO L93 Difference]: Finished difference Result 222 states and 226 transitions. [2022-03-20 19:07:12,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-03-20 19:07:12,327 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.0097087378640777) internal successors, (207), 102 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 [2022-03-20 19:07:12,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:07:12,328 INFO L225 Difference]: With dead ends: 222 [2022-03-20 19:07:12,328 INFO L226 Difference]: Without dead ends: 215 [2022-03-20 19:07:12,330 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 625 GetRequests, 420 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5049 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=16267, Invalid=26375, Unknown=0, NotChecked=0, Total=42642 [2022-03-20 19:07:12,331 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 108 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:07:12,331 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 39 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:07:12,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-03-20 19:07:12,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2022-03-20 19:07:12,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 210 states have (on average 1.0142857142857142) internal successors, (213), 210 states have internal predecessors, (213), 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) [2022-03-20 19:07:12,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 217 transitions. [2022-03-20 19:07:12,337 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 217 transitions. Word has length 211 [2022-03-20 19:07:12,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:07:12,337 INFO L478 AbstractCegarLoop]: Abstraction has 215 states and 217 transitions. [2022-03-20 19:07:12,337 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 2.0097087378640777) internal successors, (207), 102 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) [2022-03-20 19:07:12,337 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 217 transitions. [2022-03-20 19:07:12,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-03-20 19:07:12,337 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:07:12,338 INFO L499 BasicCegarLoop]: trace histogram [101, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:07:12,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-03-20 19:07:12,554 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 [2022-03-20 19:07:12,554 INFO L403 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:07:12,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:07:12,555 INFO L85 PathProgramCache]: Analyzing trace with hash -166873550, now seen corresponding path program 199 times [2022-03-20 19:07:12,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:07:12,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [425632061] [2022-03-20 19:07:12,739 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:07:12,739 INFO L85 PathProgramCache]: Analyzing trace with hash 406413648, now seen corresponding path program 1 times [2022-03-20 19:07:12,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:07:12,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376507406] [2022-03-20 19:07:12,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:07:12,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:07:12,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:07:12,741 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:07:12,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:07:12,746 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:07:12,746 INFO L85 PathProgramCache]: Analyzing trace with hash -166873550, now seen corresponding path program 200 times [2022-03-20 19:07:12,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:07:12,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980157297] [2022-03-20 19:07:12,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:07:12,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:07:12,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:07:14,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:07:14,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:07:14,537 INFO L134 CoverageAnalysis]: Checked inductivity of 10201 backedges. 101 proven. 10100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:07:14,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:07:14,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980157297] [2022-03-20 19:07:14,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980157297] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:07:14,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741827852] [2022-03-20 19:07:14,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:07:14,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:07:14,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:07:14,538 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) [2022-03-20 19:07:14,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-03-20 19:07:14,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:07:14,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:07:14,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 102 conjunts are in the unsatisfiable core [2022-03-20 19:07:14,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:07:14,920 INFO L134 CoverageAnalysis]: Checked inductivity of 10201 backedges. 101 proven. 10100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:07:14,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:07:20,290 INFO L134 CoverageAnalysis]: Checked inductivity of 10201 backedges. 101 proven. 10100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:07:20,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741827852] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:07:20,290 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:07:20,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 103, 103] total 206 [2022-03-20 19:07:20,291 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:07:20,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [425632061] [2022-03-20 19:07:20,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [425632061] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:07:20,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:07:20,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-03-20 19:07:20,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62031762] [2022-03-20 19:07:20,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:07:20,294 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-03-20 19:07:20,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:07:20,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-03-20 19:07:20,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20912, Invalid=21318, Unknown=0, NotChecked=0, Total=42230 [2022-03-20 19:07:20,297 INFO L87 Difference]: Start difference. First operand 215 states and 217 transitions. Second operand has 104 states, 104 states have (on average 2.0096153846153846) internal successors, (209), 103 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) [2022-03-20 19:07:23,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:07:23,231 INFO L93 Difference]: Finished difference Result 224 states and 228 transitions. [2022-03-20 19:07:23,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-03-20 19:07:23,231 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.0096153846153846) internal successors, (209), 103 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 [2022-03-20 19:07:23,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:07:23,232 INFO L225 Difference]: With dead ends: 224 [2022-03-20 19:07:23,232 INFO L226 Difference]: Without dead ends: 217 [2022-03-20 19:07:23,235 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 631 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 305 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5649 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=41618, Invalid=52324, Unknown=0, NotChecked=0, Total=93942 [2022-03-20 19:07:23,235 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 109 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:07:23,236 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 44 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:07:23,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-03-20 19:07:23,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2022-03-20 19:07:23,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 212 states have (on average 1.0141509433962264) internal successors, (215), 212 states have internal predecessors, (215), 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) [2022-03-20 19:07:23,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 219 transitions. [2022-03-20 19:07:23,242 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 219 transitions. Word has length 213 [2022-03-20 19:07:23,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:07:23,242 INFO L478 AbstractCegarLoop]: Abstraction has 217 states and 219 transitions. [2022-03-20 19:07:23,242 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.0096153846153846) internal successors, (209), 103 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) [2022-03-20 19:07:23,242 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 219 transitions. [2022-03-20 19:07:23,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-03-20 19:07:23,242 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:07:23,243 INFO L499 BasicCegarLoop]: trace histogram [102, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:07:23,267 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-03-20 19:07:23,443 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 [2022-03-20 19:07:23,443 INFO L403 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:07:23,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:07:23,443 INFO L85 PathProgramCache]: Analyzing trace with hash 460692815, now seen corresponding path program 201 times [2022-03-20 19:07:23,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:07:23,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [414991984] [2022-03-20 19:07:23,650 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:07:23,651 INFO L85 PathProgramCache]: Analyzing trace with hash 465518992, now seen corresponding path program 1 times [2022-03-20 19:07:23,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:07:23,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232436138] [2022-03-20 19:07:23,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:07:23,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:07:23,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:07:23,653 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:07:23,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:07:23,655 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:07:23,655 INFO L85 PathProgramCache]: Analyzing trace with hash 460692815, now seen corresponding path program 202 times [2022-03-20 19:07:23,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:07:23,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983877826] [2022-03-20 19:07:23,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:07:23,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:07:23,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:07:25,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:07:25,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:07:25,708 INFO L134 CoverageAnalysis]: Checked inductivity of 10404 backedges. 102 proven. 10302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:07:25,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:07:25,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983877826] [2022-03-20 19:07:25,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983877826] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:07:25,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484110599] [2022-03-20 19:07:25,708 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:07:25,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:07:25,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:07:25,710 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) [2022-03-20 19:07:25,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-03-20 19:07:25,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:07:25,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:07:25,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 103 conjunts are in the unsatisfiable core [2022-03-20 19:07:25,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:07:25,946 INFO L134 CoverageAnalysis]: Checked inductivity of 10404 backedges. 102 proven. 10302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:07:25,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:07:31,449 INFO L134 CoverageAnalysis]: Checked inductivity of 10404 backedges. 102 proven. 10302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:07:31,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484110599] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:07:31,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:07:31,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 104, 104] total 208 [2022-03-20 19:07:31,449 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:07:31,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [414991984] [2022-03-20 19:07:31,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [414991984] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:07:31,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:07:31,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-03-20 19:07:31,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519516734] [2022-03-20 19:07:31,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:07:31,450 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-03-20 19:07:31,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:07:31,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-03-20 19:07:31,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21323, Invalid=21733, Unknown=0, NotChecked=0, Total=43056 [2022-03-20 19:07:31,453 INFO L87 Difference]: Start difference. First operand 217 states and 219 transitions. Second operand has 105 states, 105 states have (on average 2.0095238095238095) internal successors, (211), 104 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) [2022-03-20 19:07:34,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:07:34,633 INFO L93 Difference]: Finished difference Result 226 states and 230 transitions. [2022-03-20 19:07:34,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-03-20 19:07:34,634 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.0095238095238095) internal successors, (211), 104 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 [2022-03-20 19:07:34,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:07:34,634 INFO L225 Difference]: With dead ends: 226 [2022-03-20 19:07:34,634 INFO L226 Difference]: Without dead ends: 219 [2022-03-20 19:07:34,637 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 637 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 308 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5756 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=42438, Invalid=53352, Unknown=0, NotChecked=0, Total=95790 [2022-03-20 19:07:34,637 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 110 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 19:07:34,638 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 34 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 19:07:34,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-03-20 19:07:34,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2022-03-20 19:07:34,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 214 states have (on average 1.014018691588785) internal successors, (217), 214 states have internal predecessors, (217), 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) [2022-03-20 19:07:34,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 221 transitions. [2022-03-20 19:07:34,643 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 221 transitions. Word has length 215 [2022-03-20 19:07:34,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:07:34,644 INFO L478 AbstractCegarLoop]: Abstraction has 219 states and 221 transitions. [2022-03-20 19:07:34,644 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.0095238095238095) internal successors, (211), 104 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) [2022-03-20 19:07:34,644 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 221 transitions. [2022-03-20 19:07:34,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-03-20 19:07:34,644 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:07:34,644 INFO L499 BasicCegarLoop]: trace histogram [103, 102, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:07:34,661 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2022-03-20 19:07:34,859 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 [2022-03-20 19:07:34,860 INFO L403 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:07:34,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:07:34,860 INFO L85 PathProgramCache]: Analyzing trace with hash -2038419156, now seen corresponding path program 203 times [2022-03-20 19:07:34,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:07:34,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [407485463] [2022-03-20 19:07:35,018 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:07:35,018 INFO L85 PathProgramCache]: Analyzing trace with hash 524624336, now seen corresponding path program 1 times [2022-03-20 19:07:35,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:07:35,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721134122] [2022-03-20 19:07:35,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:07:35,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:07:35,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:07:35,021 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:07:35,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:07:35,022 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:07:35,022 INFO L85 PathProgramCache]: Analyzing trace with hash -2038419156, now seen corresponding path program 204 times [2022-03-20 19:07:35,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:07:35,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056043304] [2022-03-20 19:07:35,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:07:35,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:07:35,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:07:37,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:07:37,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:07:37,204 INFO L134 CoverageAnalysis]: Checked inductivity of 10609 backedges. 103 proven. 10506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:07:37,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:07:37,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056043304] [2022-03-20 19:07:37,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056043304] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:07:37,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020820862] [2022-03-20 19:07:37,205 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 19:07:37,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:07:37,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:07:37,206 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) [2022-03-20 19:07:37,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-03-20 19:07:37,238 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 19:07:37,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:07:37,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 19:07:37,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:07:37,620 INFO L134 CoverageAnalysis]: Checked inductivity of 10609 backedges. 306 proven. 1 refuted. 0 times theorem prover too weak. 10302 trivial. 0 not checked. [2022-03-20 19:07:37,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:07:37,922 INFO L134 CoverageAnalysis]: Checked inductivity of 10609 backedges. 306 proven. 1 refuted. 0 times theorem prover too weak. 10302 trivial. 0 not checked. [2022-03-20 19:07:37,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020820862] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:07:37,922 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:07:37,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 4, 4] total 110 [2022-03-20 19:07:37,922 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:07:37,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [407485463] [2022-03-20 19:07:37,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [407485463] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:07:37,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:07:37,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-03-20 19:07:37,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120419700] [2022-03-20 19:07:37,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:07:37,923 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-03-20 19:07:37,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:07:37,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-03-20 19:07:37,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2022-03-20 19:07:37,925 INFO L87 Difference]: Start difference. First operand 219 states and 221 transitions. Second operand has 106 states, 106 states have (on average 2.009433962264151) internal successors, (213), 105 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) [2022-03-20 19:07:40,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:07:40,582 INFO L93 Difference]: Finished difference Result 228 states and 232 transitions. [2022-03-20 19:07:40,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-03-20 19:07:40,582 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.009433962264151) internal successors, (213), 105 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 [2022-03-20 19:07:40,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:07:40,583 INFO L225 Difference]: With dead ends: 228 [2022-03-20 19:07:40,583 INFO L226 Difference]: Without dead ends: 221 [2022-03-20 19:07:40,585 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 643 GetRequests, 432 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5355 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=17218, Invalid=27938, Unknown=0, NotChecked=0, Total=45156 [2022-03-20 19:07:40,585 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 111 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 44 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 [2022-03-20 19:07:40,585 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 44 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:07:40,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-03-20 19:07:40,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2022-03-20 19:07:40,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 216 states have (on average 1.0138888888888888) internal successors, (219), 216 states have internal predecessors, (219), 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) [2022-03-20 19:07:40,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 223 transitions. [2022-03-20 19:07:40,590 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 223 transitions. Word has length 217 [2022-03-20 19:07:40,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:07:40,591 INFO L478 AbstractCegarLoop]: Abstraction has 221 states and 223 transitions. [2022-03-20 19:07:40,591 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 2.009433962264151) internal successors, (213), 105 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) [2022-03-20 19:07:40,591 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 223 transitions. [2022-03-20 19:07:40,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-03-20 19:07:40,591 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:07:40,591 INFO L499 BasicCegarLoop]: trace histogram [104, 103, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:07:40,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-03-20 19:07:40,793 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 [2022-03-20 19:07:40,793 INFO L403 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:07:40,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:07:40,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1496662473, now seen corresponding path program 205 times [2022-03-20 19:07:40,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:07:40,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [981923188] [2022-03-20 19:07:41,053 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:07:41,053 INFO L85 PathProgramCache]: Analyzing trace with hash 583729680, now seen corresponding path program 1 times [2022-03-20 19:07:41,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:07:41,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384608906] [2022-03-20 19:07:41,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:07:41,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:07:41,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:07:41,055 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:07:41,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:07:41,057 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:07:41,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1496662473, now seen corresponding path program 206 times [2022-03-20 19:07:41,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:07:41,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300347806] [2022-03-20 19:07:41,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:07:41,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:07:41,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:07:42,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:07:42,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:07:42,967 INFO L134 CoverageAnalysis]: Checked inductivity of 10816 backedges. 104 proven. 10712 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:07:42,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:07:42,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300347806] [2022-03-20 19:07:42,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300347806] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:07:42,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475766413] [2022-03-20 19:07:42,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:07:42,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:07:42,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:07:42,969 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) [2022-03-20 19:07:42,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-03-20 19:07:43,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:07:43,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:07:43,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 105 conjunts are in the unsatisfiable core [2022-03-20 19:07:43,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:07:43,297 INFO L134 CoverageAnalysis]: Checked inductivity of 10816 backedges. 104 proven. 10712 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:07:43,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:07:49,210 INFO L134 CoverageAnalysis]: Checked inductivity of 10816 backedges. 104 proven. 10712 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:07:49,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475766413] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:07:49,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:07:49,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 106, 106] total 212 [2022-03-20 19:07:49,211 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:07:49,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [981923188] [2022-03-20 19:07:49,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [981923188] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:07:49,211 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:07:49,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-03-20 19:07:49,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57978256] [2022-03-20 19:07:49,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:07:49,211 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-03-20 19:07:49,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:07:49,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-03-20 19:07:49,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22157, Invalid=22575, Unknown=0, NotChecked=0, Total=44732 [2022-03-20 19:07:49,215 INFO L87 Difference]: Start difference. First operand 221 states and 223 transitions. Second operand has 107 states, 107 states have (on average 2.0093457943925235) internal successors, (215), 106 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) [2022-03-20 19:07:51,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:07:51,881 INFO L93 Difference]: Finished difference Result 230 states and 234 transitions. [2022-03-20 19:07:51,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-03-20 19:07:51,881 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.0093457943925235) internal successors, (215), 106 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 [2022-03-20 19:07:51,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:07:51,882 INFO L225 Difference]: With dead ends: 230 [2022-03-20 19:07:51,882 INFO L226 Difference]: Without dead ends: 223 [2022-03-20 19:07:51,885 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 649 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 314 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5973 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=44102, Invalid=55438, Unknown=0, NotChecked=0, Total=99540 [2022-03-20 19:07:51,885 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 112 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:07:51,885 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 39 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:07:51,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-03-20 19:07:51,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2022-03-20 19:07:51,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 218 states have (on average 1.0137614678899083) internal successors, (221), 218 states have internal predecessors, (221), 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) [2022-03-20 19:07:51,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 225 transitions. [2022-03-20 19:07:51,891 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 225 transitions. Word has length 219 [2022-03-20 19:07:51,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:07:51,891 INFO L478 AbstractCegarLoop]: Abstraction has 223 states and 225 transitions. [2022-03-20 19:07:51,891 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.0093457943925235) internal successors, (215), 106 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) [2022-03-20 19:07:51,891 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 225 transitions. [2022-03-20 19:07:51,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-03-20 19:07:51,892 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:07:51,892 INFO L499 BasicCegarLoop]: trace histogram [105, 104, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:07:51,909 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-03-20 19:07:52,093 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 [2022-03-20 19:07:52,093 INFO L403 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:07:52,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:07:52,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1390976806, now seen corresponding path program 207 times [2022-03-20 19:07:52,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:07:52,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [210636700] [2022-03-20 19:07:52,327 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:07:52,327 INFO L85 PathProgramCache]: Analyzing trace with hash 642835024, now seen corresponding path program 1 times [2022-03-20 19:07:52,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:07:52,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470746559] [2022-03-20 19:07:52,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:07:52,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:07:52,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:07:52,329 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:07:52,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:07:52,331 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:07:52,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1390976806, now seen corresponding path program 208 times [2022-03-20 19:07:52,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:07:52,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015504775] [2022-03-20 19:07:52,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:07:52,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:07:52,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:07:54,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:07:54,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:07:54,348 INFO L134 CoverageAnalysis]: Checked inductivity of 11025 backedges. 105 proven. 10920 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:07:54,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:07:54,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015504775] [2022-03-20 19:07:54,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015504775] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:07:54,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419042557] [2022-03-20 19:07:54,349 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:07:54,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:07:54,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:07:54,350 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) [2022-03-20 19:07:54,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-03-20 19:07:54,423 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:07:54,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:07:54,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 106 conjunts are in the unsatisfiable core [2022-03-20 19:07:54,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:07:54,605 INFO L134 CoverageAnalysis]: Checked inductivity of 11025 backedges. 105 proven. 10920 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:07:54,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:08:00,374 INFO L134 CoverageAnalysis]: Checked inductivity of 11025 backedges. 105 proven. 10920 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:08:00,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419042557] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:08:00,375 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:08:00,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 107, 107] total 214 [2022-03-20 19:08:00,375 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:08:00,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [210636700] [2022-03-20 19:08:00,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [210636700] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:08:00,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:08:00,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-03-20 19:08:00,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003738129] [2022-03-20 19:08:00,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:08:00,375 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-03-20 19:08:00,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:08:00,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-03-20 19:08:00,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22580, Invalid=23002, Unknown=0, NotChecked=0, Total=45582 [2022-03-20 19:08:00,379 INFO L87 Difference]: Start difference. First operand 223 states and 225 transitions. Second operand has 108 states, 108 states have (on average 2.009259259259259) internal successors, (217), 107 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) [2022-03-20 19:08:03,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:08:03,092 INFO L93 Difference]: Finished difference Result 232 states and 236 transitions. [2022-03-20 19:08:03,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-03-20 19:08:03,092 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 2.009259259259259) internal successors, (217), 107 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 [2022-03-20 19:08:03,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:08:03,093 INFO L225 Difference]: With dead ends: 232 [2022-03-20 19:08:03,093 INFO L226 Difference]: Without dead ends: 225 [2022-03-20 19:08:03,096 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 655 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 317 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6083 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=44946, Invalid=56496, Unknown=0, NotChecked=0, Total=101442 [2022-03-20 19:08:03,096 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 113 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:08:03,096 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 44 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:08:03,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-03-20 19:08:03,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2022-03-20 19:08:03,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 220 states have (on average 1.0136363636363637) internal successors, (223), 220 states have internal predecessors, (223), 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) [2022-03-20 19:08:03,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 227 transitions. [2022-03-20 19:08:03,102 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 227 transitions. Word has length 221 [2022-03-20 19:08:03,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:08:03,102 INFO L478 AbstractCegarLoop]: Abstraction has 225 states and 227 transitions. [2022-03-20 19:08:03,102 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 2.009259259259259) internal successors, (217), 107 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) [2022-03-20 19:08:03,103 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 227 transitions. [2022-03-20 19:08:03,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-03-20 19:08:03,103 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:08:03,103 INFO L499 BasicCegarLoop]: trace histogram [106, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:08:03,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2022-03-20 19:08:03,319 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 [2022-03-20 19:08:03,320 INFO L403 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:08:03,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:08:03,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1388701373, now seen corresponding path program 209 times [2022-03-20 19:08:03,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:08:03,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [728898483] [2022-03-20 19:08:03,516 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:08:03,516 INFO L85 PathProgramCache]: Analyzing trace with hash 701940368, now seen corresponding path program 1 times [2022-03-20 19:08:03,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:08:03,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32480331] [2022-03-20 19:08:03,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:08:03,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:08:03,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:08:03,518 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:08:03,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:08:03,519 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:08:03,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1388701373, now seen corresponding path program 210 times [2022-03-20 19:08:03,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:08:03,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797771456] [2022-03-20 19:08:03,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:08:03,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:08:03,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:08:05,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:08:05,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:08:05,519 INFO L134 CoverageAnalysis]: Checked inductivity of 11236 backedges. 106 proven. 11130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:08:05,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:08:05,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797771456] [2022-03-20 19:08:05,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797771456] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:08:05,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147283453] [2022-03-20 19:08:05,519 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 19:08:05,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:08:05,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:08:05,520 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) [2022-03-20 19:08:05,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-03-20 19:08:05,560 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 19:08:05,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:08:05,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 19:08:05,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:08:05,749 INFO L134 CoverageAnalysis]: Checked inductivity of 11236 backedges. 315 proven. 1 refuted. 0 times theorem prover too weak. 10920 trivial. 0 not checked. [2022-03-20 19:08:05,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:08:05,919 INFO L134 CoverageAnalysis]: Checked inductivity of 11236 backedges. 315 proven. 1 refuted. 0 times theorem prover too weak. 10920 trivial. 0 not checked. [2022-03-20 19:08:05,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147283453] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:08:05,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:08:05,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 4, 4] total 113 [2022-03-20 19:08:05,920 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:08:05,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [728898483] [2022-03-20 19:08:05,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [728898483] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:08:05,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:08:05,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2022-03-20 19:08:05,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789741735] [2022-03-20 19:08:05,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:08:05,920 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-03-20 19:08:05,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:08:05,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-03-20 19:08:05,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6218, Invalid=6438, Unknown=0, NotChecked=0, Total=12656 [2022-03-20 19:08:05,923 INFO L87 Difference]: Start difference. First operand 225 states and 227 transitions. Second operand has 109 states, 109 states have (on average 2.0091743119266057) internal successors, (219), 108 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) [2022-03-20 19:08:08,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:08:08,668 INFO L93 Difference]: Finished difference Result 234 states and 238 transitions. [2022-03-20 19:08:08,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-03-20 19:08:08,668 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.0091743119266057) internal successors, (219), 108 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 [2022-03-20 19:08:08,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:08:08,669 INFO L225 Difference]: With dead ends: 234 [2022-03-20 19:08:08,669 INFO L226 Difference]: Without dead ends: 227 [2022-03-20 19:08:08,671 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 661 GetRequests, 444 SyntacticMatches, 0 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5670 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=18196, Invalid=29546, Unknown=0, NotChecked=0, Total=47742 [2022-03-20 19:08:08,671 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 114 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:08:08,672 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 44 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:08:08,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-03-20 19:08:08,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2022-03-20 19:08:08,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 222 states have (on average 1.0135135135135136) internal successors, (225), 222 states have internal predecessors, (225), 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) [2022-03-20 19:08:08,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 229 transitions. [2022-03-20 19:08:08,678 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 229 transitions. Word has length 223 [2022-03-20 19:08:08,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:08:08,678 INFO L478 AbstractCegarLoop]: Abstraction has 227 states and 229 transitions. [2022-03-20 19:08:08,678 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 2.0091743119266057) internal successors, (219), 108 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) [2022-03-20 19:08:08,678 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 229 transitions. [2022-03-20 19:08:08,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-03-20 19:08:08,679 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:08:08,679 INFO L499 BasicCegarLoop]: trace histogram [107, 106, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:08:08,695 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-03-20 19:08:08,894 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 [2022-03-20 19:08:08,894 INFO L403 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:08:08,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:08:08,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1189773280, now seen corresponding path program 211 times [2022-03-20 19:08:08,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:08:08,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [414380703] [2022-03-20 19:08:09,077 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:08:09,078 INFO L85 PathProgramCache]: Analyzing trace with hash 761045712, now seen corresponding path program 1 times [2022-03-20 19:08:09,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:08:09,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056605265] [2022-03-20 19:08:09,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:08:09,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:08:09,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:08:09,081 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:08:09,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:08:09,082 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:08:09,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1189773280, now seen corresponding path program 212 times [2022-03-20 19:08:09,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:08:09,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987065502] [2022-03-20 19:08:09,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:08:09,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:08:09,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:08:11,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:08:11,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:08:11,130 INFO L134 CoverageAnalysis]: Checked inductivity of 11449 backedges. 107 proven. 11342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:08:11,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:08:11,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987065502] [2022-03-20 19:08:11,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987065502] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:08:11,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601922860] [2022-03-20 19:08:11,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:08:11,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:08:11,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:08:11,131 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) [2022-03-20 19:08:11,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-03-20 19:08:11,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:08:11,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:08:11,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 108 conjunts are in the unsatisfiable core [2022-03-20 19:08:11,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:08:11,396 INFO L134 CoverageAnalysis]: Checked inductivity of 11449 backedges. 107 proven. 11342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:08:11,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:08:17,412 INFO L134 CoverageAnalysis]: Checked inductivity of 11449 backedges. 107 proven. 11342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:08:17,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601922860] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:08:17,412 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:08:17,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 109, 109] total 218 [2022-03-20 19:08:17,412 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:08:17,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [414380703] [2022-03-20 19:08:17,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [414380703] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:08:17,412 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:08:17,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2022-03-20 19:08:17,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890417898] [2022-03-20 19:08:17,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:08:17,413 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-03-20 19:08:17,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:08:17,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-03-20 19:08:17,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23438, Invalid=23868, Unknown=0, NotChecked=0, Total=47306 [2022-03-20 19:08:17,416 INFO L87 Difference]: Start difference. First operand 227 states and 229 transitions. Second operand has 110 states, 110 states have (on average 2.0090909090909093) internal successors, (221), 109 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) [2022-03-20 19:08:20,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:08:20,184 INFO L93 Difference]: Finished difference Result 236 states and 240 transitions. [2022-03-20 19:08:20,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-03-20 19:08:20,184 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.0090909090909093) internal successors, (221), 109 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 [2022-03-20 19:08:20,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:08:20,185 INFO L225 Difference]: With dead ends: 236 [2022-03-20 19:08:20,185 INFO L226 Difference]: Without dead ends: 229 [2022-03-20 19:08:20,189 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 667 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 323 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6306 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=46658, Invalid=58642, Unknown=0, NotChecked=0, Total=105300 [2022-03-20 19:08:20,190 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 115 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:08:20,190 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 34 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:08:20,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-03-20 19:08:20,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2022-03-20 19:08:20,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 224 states have (on average 1.0133928571428572) internal successors, (227), 224 states have internal predecessors, (227), 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) [2022-03-20 19:08:20,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 231 transitions. [2022-03-20 19:08:20,204 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 231 transitions. Word has length 225 [2022-03-20 19:08:20,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:08:20,204 INFO L478 AbstractCegarLoop]: Abstraction has 229 states and 231 transitions. [2022-03-20 19:08:20,204 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 2.0090909090909093) internal successors, (221), 109 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) [2022-03-20 19:08:20,204 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 231 transitions. [2022-03-20 19:08:20,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-03-20 19:08:20,205 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:08:20,205 INFO L499 BasicCegarLoop]: trace histogram [108, 107, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:08:20,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2022-03-20 19:08:20,419 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 [2022-03-20 19:08:20,419 INFO L403 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:08:20,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:08:20,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1001563069, now seen corresponding path program 213 times [2022-03-20 19:08:20,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:08:20,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1281042499] [2022-03-20 19:08:20,595 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:08:20,595 INFO L85 PathProgramCache]: Analyzing trace with hash 820151056, now seen corresponding path program 1 times [2022-03-20 19:08:20,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:08:20,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765150326] [2022-03-20 19:08:20,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:08:20,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:08:20,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:08:20,597 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:08:20,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:08:20,599 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:08:20,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1001563069, now seen corresponding path program 214 times [2022-03-20 19:08:20,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:08:20,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331735299] [2022-03-20 19:08:20,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:08:20,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:08:20,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:08:22,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:08:22,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:08:22,683 INFO L134 CoverageAnalysis]: Checked inductivity of 11664 backedges. 108 proven. 11556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:08:22,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:08:22,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331735299] [2022-03-20 19:08:22,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331735299] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:08:22,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761335386] [2022-03-20 19:08:22,684 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:08:22,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:08:22,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:08:22,685 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) [2022-03-20 19:08:22,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-03-20 19:08:22,755 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:08:22,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:08:22,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 109 conjunts are in the unsatisfiable core [2022-03-20 19:08:22,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:08:22,941 INFO L134 CoverageAnalysis]: Checked inductivity of 11664 backedges. 108 proven. 11556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:08:22,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:08:28,999 INFO L134 CoverageAnalysis]: Checked inductivity of 11664 backedges. 108 proven. 11556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:08:28,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761335386] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:08:28,999 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:08:28,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 110, 110] total 220 [2022-03-20 19:08:28,999 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:08:28,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1281042499] [2022-03-20 19:08:28,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1281042499] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:08:28,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:08:29,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2022-03-20 19:08:29,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266446610] [2022-03-20 19:08:29,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:08:29,000 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-03-20 19:08:29,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:08:29,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-03-20 19:08:29,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23873, Invalid=24307, Unknown=0, NotChecked=0, Total=48180 [2022-03-20 19:08:29,003 INFO L87 Difference]: Start difference. First operand 229 states and 231 transitions. Second operand has 111 states, 111 states have (on average 2.009009009009009) internal successors, (223), 110 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) [2022-03-20 19:08:31,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:08:31,723 INFO L93 Difference]: Finished difference Result 238 states and 242 transitions. [2022-03-20 19:08:31,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-03-20 19:08:31,724 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.009009009009009) internal successors, (223), 110 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 [2022-03-20 19:08:31,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:08:31,724 INFO L225 Difference]: With dead ends: 238 [2022-03-20 19:08:31,724 INFO L226 Difference]: Without dead ends: 231 [2022-03-20 19:08:31,728 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 673 GetRequests, 347 SyntacticMatches, 0 SemanticMatches, 326 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6419 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=47526, Invalid=59730, Unknown=0, NotChecked=0, Total=107256 [2022-03-20 19:08:31,728 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 116 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:08:31,728 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 19 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:08:31,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-03-20 19:08:31,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2022-03-20 19:08:31,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 226 states have (on average 1.0132743362831858) internal successors, (229), 226 states have internal predecessors, (229), 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) [2022-03-20 19:08:31,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 233 transitions. [2022-03-20 19:08:31,734 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 233 transitions. Word has length 227 [2022-03-20 19:08:31,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:08:31,734 INFO L478 AbstractCegarLoop]: Abstraction has 231 states and 233 transitions. [2022-03-20 19:08:31,734 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 2.009009009009009) internal successors, (223), 110 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) [2022-03-20 19:08:31,734 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 233 transitions. [2022-03-20 19:08:31,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2022-03-20 19:08:31,734 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:08:31,734 INFO L499 BasicCegarLoop]: trace histogram [109, 108, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:08:31,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-03-20 19:08:31,951 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 [2022-03-20 19:08:31,951 INFO L403 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:08:31,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:08:31,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1953147878, now seen corresponding path program 215 times [2022-03-20 19:08:31,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:08:31,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [309048888] [2022-03-20 19:08:32,128 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:08:32,128 INFO L85 PathProgramCache]: Analyzing trace with hash 879256400, now seen corresponding path program 1 times [2022-03-20 19:08:32,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:08:32,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376085248] [2022-03-20 19:08:32,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:08:32,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:08:32,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:08:32,130 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:08:32,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:08:32,131 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:08:32,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1953147878, now seen corresponding path program 216 times [2022-03-20 19:08:32,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:08:32,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800945376] [2022-03-20 19:08:32,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:08:32,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:08:32,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:08:34,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:08:34,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:08:34,445 INFO L134 CoverageAnalysis]: Checked inductivity of 11881 backedges. 109 proven. 11772 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:08:34,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:08:34,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800945376] [2022-03-20 19:08:34,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800945376] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:08:34,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284902765] [2022-03-20 19:08:34,446 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 19:08:34,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:08:34,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:08:34,447 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) [2022-03-20 19:08:34,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-03-20 19:08:34,476 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 19:08:34,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:08:34,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 19:08:34,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:08:34,732 INFO L134 CoverageAnalysis]: Checked inductivity of 11881 backedges. 324 proven. 1 refuted. 0 times theorem prover too weak. 11556 trivial. 0 not checked. [2022-03-20 19:08:34,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:08:34,981 INFO L134 CoverageAnalysis]: Checked inductivity of 11881 backedges. 324 proven. 1 refuted. 0 times theorem prover too weak. 11556 trivial. 0 not checked. [2022-03-20 19:08:34,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284902765] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:08:34,981 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:08:34,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 4, 4] total 116 [2022-03-20 19:08:34,982 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:08:34,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [309048888] [2022-03-20 19:08:34,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [309048888] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:08:34,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:08:34,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2022-03-20 19:08:34,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032622306] [2022-03-20 19:08:34,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:08:34,982 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-03-20 19:08:34,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:08:34,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-03-20 19:08:34,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=6783, Unknown=0, NotChecked=0, Total=13340 [2022-03-20 19:08:34,984 INFO L87 Difference]: Start difference. First operand 231 states and 233 transitions. Second operand has 112 states, 112 states have (on average 2.0089285714285716) internal successors, (225), 111 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) [2022-03-20 19:08:38,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:08:38,922 INFO L93 Difference]: Finished difference Result 240 states and 244 transitions. [2022-03-20 19:08:38,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-03-20 19:08:38,922 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 2.0089285714285716) internal successors, (225), 111 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 [2022-03-20 19:08:38,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:08:38,923 INFO L225 Difference]: With dead ends: 240 [2022-03-20 19:08:38,923 INFO L226 Difference]: Without dead ends: 233 [2022-03-20 19:08:38,926 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 679 GetRequests, 456 SyntacticMatches, 0 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5994 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=19201, Invalid=31199, Unknown=0, NotChecked=0, Total=50400 [2022-03-20 19:08:38,926 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 117 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 19:08:38,926 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 49 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 19:08:38,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-03-20 19:08:38,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2022-03-20 19:08:38,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 228 states have (on average 1.013157894736842) internal successors, (231), 228 states have internal predecessors, (231), 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) [2022-03-20 19:08:38,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 235 transitions. [2022-03-20 19:08:38,933 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 235 transitions. Word has length 229 [2022-03-20 19:08:38,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:08:38,933 INFO L478 AbstractCegarLoop]: Abstraction has 233 states and 235 transitions. [2022-03-20 19:08:38,933 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 2.0089285714285716) internal successors, (225), 111 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) [2022-03-20 19:08:38,933 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 235 transitions. [2022-03-20 19:08:38,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-03-20 19:08:38,933 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:08:38,933 INFO L499 BasicCegarLoop]: trace histogram [110, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:08:38,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2022-03-20 19:08:39,147 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 [2022-03-20 19:08:39,147 INFO L403 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:08:39,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:08:39,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1837982007, now seen corresponding path program 217 times [2022-03-20 19:08:39,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:08:39,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [862117168] [2022-03-20 19:08:39,309 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:08:39,309 INFO L85 PathProgramCache]: Analyzing trace with hash 938361744, now seen corresponding path program 1 times [2022-03-20 19:08:39,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:08:39,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091023738] [2022-03-20 19:08:39,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:08:39,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:08:39,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:08:39,329 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:08:39,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:08:39,331 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:08:39,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1837982007, now seen corresponding path program 218 times [2022-03-20 19:08:39,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:08:39,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484596054] [2022-03-20 19:08:39,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:08:39,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:08:39,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:08:42,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:08:42,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:08:42,248 INFO L134 CoverageAnalysis]: Checked inductivity of 12100 backedges. 110 proven. 11990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:08:42,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:08:42,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484596054] [2022-03-20 19:08:42,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484596054] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:08:42,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988851230] [2022-03-20 19:08:42,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:08:42,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:08:42,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:08:42,250 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) [2022-03-20 19:08:42,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-03-20 19:08:42,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:08:42,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:08:42,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 111 conjunts are in the unsatisfiable core [2022-03-20 19:08:42,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:08:42,500 INFO L134 CoverageAnalysis]: Checked inductivity of 12100 backedges. 110 proven. 11990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:08:42,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:08:50,824 INFO L134 CoverageAnalysis]: Checked inductivity of 12100 backedges. 110 proven. 11990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:08:50,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988851230] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:08:50,824 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:08:50,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 112, 112] total 224 [2022-03-20 19:08:50,824 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:08:50,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [862117168] [2022-03-20 19:08:50,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [862117168] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:08:50,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:08:50,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2022-03-20 19:08:50,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847004432] [2022-03-20 19:08:50,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:08:50,825 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-03-20 19:08:50,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:08:50,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-03-20 19:08:50,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24755, Invalid=25197, Unknown=0, NotChecked=0, Total=49952 [2022-03-20 19:08:50,828 INFO L87 Difference]: Start difference. First operand 233 states and 235 transitions. Second operand has 113 states, 113 states have (on average 2.0088495575221237) internal successors, (227), 112 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) [2022-03-20 19:08:54,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:08:54,272 INFO L93 Difference]: Finished difference Result 242 states and 246 transitions. [2022-03-20 19:08:54,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-03-20 19:08:54,272 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 2.0088495575221237) internal successors, (227), 112 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 [2022-03-20 19:08:54,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:08:54,272 INFO L225 Difference]: With dead ends: 242 [2022-03-20 19:08:54,273 INFO L226 Difference]: Without dead ends: 235 [2022-03-20 19:08:54,277 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 685 GetRequests, 353 SyntacticMatches, 0 SemanticMatches, 332 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6648 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=49286, Invalid=61936, Unknown=0, NotChecked=0, Total=111222 [2022-03-20 19:08:54,278 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 118 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 19:08:54,278 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 49 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 19:08:54,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-03-20 19:08:54,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2022-03-20 19:08:54,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 230 states have (on average 1.0130434782608695) internal successors, (233), 230 states have internal predecessors, (233), 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) [2022-03-20 19:08:54,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 237 transitions. [2022-03-20 19:08:54,284 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 237 transitions. Word has length 231 [2022-03-20 19:08:54,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:08:54,284 INFO L478 AbstractCegarLoop]: Abstraction has 235 states and 237 transitions. [2022-03-20 19:08:54,285 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 2.0088495575221237) internal successors, (227), 112 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) [2022-03-20 19:08:54,285 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 237 transitions. [2022-03-20 19:08:54,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2022-03-20 19:08:54,285 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:08:54,286 INFO L499 BasicCegarLoop]: trace histogram [111, 110, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:08:54,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-03-20 19:08:54,502 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 [2022-03-20 19:08:54,502 INFO L403 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:08:54,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:08:54,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1313432812, now seen corresponding path program 219 times [2022-03-20 19:08:54,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:08:54,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1064002771] [2022-03-20 19:08:54,627 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:08:54,628 INFO L85 PathProgramCache]: Analyzing trace with hash 997467088, now seen corresponding path program 1 times [2022-03-20 19:08:54,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:08:54,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032948854] [2022-03-20 19:08:54,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:08:54,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:08:54,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:08:54,630 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:08:54,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:08:54,631 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:08:54,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1313432812, now seen corresponding path program 220 times [2022-03-20 19:08:54,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:08:54,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019086191] [2022-03-20 19:08:54,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:08:54,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:08:54,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:08:56,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:08:56,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:08:56,838 INFO L134 CoverageAnalysis]: Checked inductivity of 12321 backedges. 111 proven. 12210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:08:56,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:08:56,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019086191] [2022-03-20 19:08:56,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019086191] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:08:56,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307177760] [2022-03-20 19:08:56,839 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:08:56,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:08:56,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:08:56,840 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) [2022-03-20 19:08:56,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-03-20 19:08:56,914 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:08:56,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:08:56,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 112 conjunts are in the unsatisfiable core [2022-03-20 19:08:56,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:08:57,149 INFO L134 CoverageAnalysis]: Checked inductivity of 12321 backedges. 111 proven. 12210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:08:57,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:09:03,825 INFO L134 CoverageAnalysis]: Checked inductivity of 12321 backedges. 111 proven. 12210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:09:03,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307177760] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:09:03,825 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:09:03,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [114, 113, 113] total 226 [2022-03-20 19:09:03,825 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:09:03,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1064002771] [2022-03-20 19:09:03,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1064002771] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:09:03,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:09:03,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2022-03-20 19:09:03,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012846641] [2022-03-20 19:09:03,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:09:03,826 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-03-20 19:09:03,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:09:03,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-03-20 19:09:03,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25202, Invalid=25648, Unknown=0, NotChecked=0, Total=50850 [2022-03-20 19:09:03,830 INFO L87 Difference]: Start difference. First operand 235 states and 237 transitions. Second operand has 114 states, 114 states have (on average 2.008771929824561) internal successors, (229), 113 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) [2022-03-20 19:09:07,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:09:07,194 INFO L93 Difference]: Finished difference Result 244 states and 248 transitions. [2022-03-20 19:09:07,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-03-20 19:09:07,194 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 2.008771929824561) internal successors, (229), 113 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 [2022-03-20 19:09:07,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:09:07,195 INFO L225 Difference]: With dead ends: 244 [2022-03-20 19:09:07,195 INFO L226 Difference]: Without dead ends: 237 [2022-03-20 19:09:07,199 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 691 GetRequests, 356 SyntacticMatches, 0 SemanticMatches, 335 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6764 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=50178, Invalid=63054, Unknown=0, NotChecked=0, Total=113232 [2022-03-20 19:09:07,200 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 119 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 19:09:07,200 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 49 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 19:09:07,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-03-20 19:09:07,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2022-03-20 19:09:07,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 232 states have (on average 1.0129310344827587) internal successors, (235), 232 states have internal predecessors, (235), 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) [2022-03-20 19:09:07,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 239 transitions. [2022-03-20 19:09:07,206 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 239 transitions. Word has length 233 [2022-03-20 19:09:07,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:09:07,206 INFO L478 AbstractCegarLoop]: Abstraction has 237 states and 239 transitions. [2022-03-20 19:09:07,206 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 2.008771929824561) internal successors, (229), 113 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) [2022-03-20 19:09:07,206 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 239 transitions. [2022-03-20 19:09:07,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-03-20 19:09:07,207 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:09:07,207 INFO L499 BasicCegarLoop]: trace histogram [112, 111, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:09:07,224 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-03-20 19:09:07,423 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 [2022-03-20 19:09:07,423 INFO L403 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:09:07,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:09:07,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1871130191, now seen corresponding path program 221 times [2022-03-20 19:09:07,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:09:07,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1668218748] [2022-03-20 19:09:07,670 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:09:07,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1056572432, now seen corresponding path program 1 times [2022-03-20 19:09:07,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:09:07,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508611331] [2022-03-20 19:09:07,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:09:07,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:09:07,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:09:07,673 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:09:07,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:09:07,674 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:09:07,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1871130191, now seen corresponding path program 222 times [2022-03-20 19:09:07,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:09:07,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872684137] [2022-03-20 19:09:07,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:09:07,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:09:07,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:09:09,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:09:09,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:09:09,931 INFO L134 CoverageAnalysis]: Checked inductivity of 12544 backedges. 112 proven. 12432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:09:09,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:09:09,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872684137] [2022-03-20 19:09:09,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872684137] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:09:09,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909327028] [2022-03-20 19:09:09,931 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 19:09:09,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:09:09,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:09:09,932 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) [2022-03-20 19:09:09,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-03-20 19:09:09,966 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 19:09:09,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:09:09,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 19:09:09,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:09:10,167 INFO L134 CoverageAnalysis]: Checked inductivity of 12544 backedges. 333 proven. 1 refuted. 0 times theorem prover too weak. 12210 trivial. 0 not checked. [2022-03-20 19:09:10,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:09:10,346 INFO L134 CoverageAnalysis]: Checked inductivity of 12544 backedges. 333 proven. 1 refuted. 0 times theorem prover too weak. 12210 trivial. 0 not checked. [2022-03-20 19:09:10,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909327028] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:09:10,346 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:09:10,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [115, 4, 4] total 119 [2022-03-20 19:09:10,346 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:09:10,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1668218748] [2022-03-20 19:09:10,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1668218748] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:09:10,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:09:10,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [115] imperfect sequences [] total 115 [2022-03-20 19:09:10,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892162165] [2022-03-20 19:09:10,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:09:10,347 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-03-20 19:09:10,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:09:10,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-03-20 19:09:10,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6905, Invalid=7137, Unknown=0, NotChecked=0, Total=14042 [2022-03-20 19:09:10,350 INFO L87 Difference]: Start difference. First operand 237 states and 239 transitions. Second operand has 115 states, 115 states have (on average 2.008695652173913) internal successors, (231), 114 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) [2022-03-20 19:09:13,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:09:13,469 INFO L93 Difference]: Finished difference Result 246 states and 250 transitions. [2022-03-20 19:09:13,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-03-20 19:09:13,469 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 2.008695652173913) internal successors, (231), 114 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 [2022-03-20 19:09:13,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:09:13,470 INFO L225 Difference]: With dead ends: 246 [2022-03-20 19:09:13,470 INFO L226 Difference]: Without dead ends: 239 [2022-03-20 19:09:13,472 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 697 GetRequests, 468 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6327 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=20233, Invalid=32897, Unknown=0, NotChecked=0, Total=53130 [2022-03-20 19:09:13,472 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 120 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 19:09:13,473 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 64 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 19:09:13,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-03-20 19:09:13,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2022-03-20 19:09:13,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 234 states have (on average 1.0128205128205128) internal successors, (237), 234 states have internal predecessors, (237), 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) [2022-03-20 19:09:13,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 241 transitions. [2022-03-20 19:09:13,496 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 241 transitions. Word has length 235 [2022-03-20 19:09:13,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:09:13,496 INFO L478 AbstractCegarLoop]: Abstraction has 239 states and 241 transitions. [2022-03-20 19:09:13,496 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 2.008695652173913) internal successors, (231), 114 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) [2022-03-20 19:09:13,496 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 241 transitions. [2022-03-20 19:09:13,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2022-03-20 19:09:13,497 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:09:13,497 INFO L499 BasicCegarLoop]: trace histogram [113, 112, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:09:13,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2022-03-20 19:09:13,697 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 [2022-03-20 19:09:13,697 INFO L403 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:09:13,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:09:13,697 INFO L85 PathProgramCache]: Analyzing trace with hash -947399410, now seen corresponding path program 223 times [2022-03-20 19:09:13,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:09:13,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1692247096] [2022-03-20 19:09:13,843 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:09:13,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1115677776, now seen corresponding path program 1 times [2022-03-20 19:09:13,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:09:13,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175586059] [2022-03-20 19:09:13,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:09:13,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:09:13,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:09:13,847 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:09:13,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:09:13,848 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:09:13,848 INFO L85 PathProgramCache]: Analyzing trace with hash -947399410, now seen corresponding path program 224 times [2022-03-20 19:09:13,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:09:13,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834010008] [2022-03-20 19:09:13,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:09:13,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:09:13,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:09:16,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:09:16,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:09:16,090 INFO L134 CoverageAnalysis]: Checked inductivity of 12769 backedges. 113 proven. 12656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:09:16,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:09:16,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834010008] [2022-03-20 19:09:16,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834010008] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:09:16,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661048201] [2022-03-20 19:09:16,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:09:16,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:09:16,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:09:16,092 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) [2022-03-20 19:09:16,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-03-20 19:09:16,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:09:16,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:09:16,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 114 conjunts are in the unsatisfiable core [2022-03-20 19:09:16,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:09:16,346 INFO L134 CoverageAnalysis]: Checked inductivity of 12769 backedges. 113 proven. 12656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:09:16,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:09:22,907 INFO L134 CoverageAnalysis]: Checked inductivity of 12769 backedges. 113 proven. 12656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:09:22,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661048201] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:09:22,907 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:09:22,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [116, 115, 115] total 230 [2022-03-20 19:09:22,907 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:09:22,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1692247096] [2022-03-20 19:09:22,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1692247096] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:09:22,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:09:22,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2022-03-20 19:09:22,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160688428] [2022-03-20 19:09:22,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:09:22,908 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-03-20 19:09:22,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:09:22,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-03-20 19:09:22,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26108, Invalid=26562, Unknown=0, NotChecked=0, Total=52670 [2022-03-20 19:09:22,912 INFO L87 Difference]: Start difference. First operand 239 states and 241 transitions. Second operand has 116 states, 116 states have (on average 2.0086206896551726) internal successors, (233), 115 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) [2022-03-20 19:09:26,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:09:26,070 INFO L93 Difference]: Finished difference Result 248 states and 252 transitions. [2022-03-20 19:09:26,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-03-20 19:09:26,071 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.0086206896551726) internal successors, (233), 115 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 [2022-03-20 19:09:26,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:09:26,071 INFO L225 Difference]: With dead ends: 248 [2022-03-20 19:09:26,071 INFO L226 Difference]: Without dead ends: 241 [2022-03-20 19:09:26,075 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 703 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 341 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6999 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=51986, Invalid=65320, Unknown=0, NotChecked=0, Total=117306 [2022-03-20 19:09:26,075 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 121 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 19:09:26,075 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 39 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 19:09:26,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-03-20 19:09:26,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2022-03-20 19:09:26,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 236 states have (on average 1.0127118644067796) internal successors, (239), 236 states have internal predecessors, (239), 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) [2022-03-20 19:09:26,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 243 transitions. [2022-03-20 19:09:26,081 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 243 transitions. Word has length 237 [2022-03-20 19:09:26,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:09:26,081 INFO L478 AbstractCegarLoop]: Abstraction has 241 states and 243 transitions. [2022-03-20 19:09:26,081 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 2.0086206896551726) internal successors, (233), 115 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) [2022-03-20 19:09:26,081 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 243 transitions. [2022-03-20 19:09:26,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-03-20 19:09:26,082 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:09:26,082 INFO L499 BasicCegarLoop]: trace histogram [114, 113, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:09:26,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2022-03-20 19:09:26,295 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 [2022-03-20 19:09:26,295 INFO L403 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:09:26,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:09:26,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1994618155, now seen corresponding path program 225 times [2022-03-20 19:09:26,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:09:26,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1619664672] [2022-03-20 19:09:26,555 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:09:26,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1174783120, now seen corresponding path program 1 times [2022-03-20 19:09:26,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:09:26,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091490377] [2022-03-20 19:09:26,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:09:26,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:09:26,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:09:26,557 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:09:26,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:09:26,559 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:09:26,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1994618155, now seen corresponding path program 226 times [2022-03-20 19:09:26,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:09:26,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347953285] [2022-03-20 19:09:26,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:09:26,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:09:26,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:09:28,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:09:28,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:09:28,867 INFO L134 CoverageAnalysis]: Checked inductivity of 12996 backedges. 114 proven. 12882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:09:28,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:09:28,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347953285] [2022-03-20 19:09:28,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347953285] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:09:28,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257736001] [2022-03-20 19:09:28,868 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:09:28,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:09:28,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:09:28,870 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) [2022-03-20 19:09:28,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-03-20 19:09:28,957 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:09:28,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:09:28,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 115 conjunts are in the unsatisfiable core [2022-03-20 19:09:28,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:09:29,154 INFO L134 CoverageAnalysis]: Checked inductivity of 12996 backedges. 114 proven. 12882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:09:29,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:09:36,175 INFO L134 CoverageAnalysis]: Checked inductivity of 12996 backedges. 114 proven. 12882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:09:36,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257736001] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:09:36,175 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:09:36,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 116, 116] total 232 [2022-03-20 19:09:36,175 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:09:36,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1619664672] [2022-03-20 19:09:36,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1619664672] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:09:36,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:09:36,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [117] imperfect sequences [] total 117 [2022-03-20 19:09:36,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068152881] [2022-03-20 19:09:36,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:09:36,176 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-03-20 19:09:36,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:09:36,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-03-20 19:09:36,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26567, Invalid=27025, Unknown=0, NotChecked=0, Total=53592 [2022-03-20 19:09:36,180 INFO L87 Difference]: Start difference. First operand 241 states and 243 transitions. Second operand has 117 states, 117 states have (on average 2.0085470085470085) internal successors, (235), 116 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) [2022-03-20 19:09:39,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:09:39,595 INFO L93 Difference]: Finished difference Result 250 states and 254 transitions. [2022-03-20 19:09:39,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-03-20 19:09:39,596 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 2.0085470085470085) internal successors, (235), 116 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 [2022-03-20 19:09:39,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:09:39,596 INFO L225 Difference]: With dead ends: 250 [2022-03-20 19:09:39,596 INFO L226 Difference]: Without dead ends: 243 [2022-03-20 19:09:39,600 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 709 GetRequests, 365 SyntacticMatches, 0 SemanticMatches, 344 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7118 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=52902, Invalid=66468, Unknown=0, NotChecked=0, Total=119370 [2022-03-20 19:09:39,600 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 122 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 19:09:39,600 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 54 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 19:09:39,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-03-20 19:09:39,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 243. [2022-03-20 19:09:39,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 238 states have (on average 1.0126050420168067) internal successors, (241), 238 states have internal predecessors, (241), 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) [2022-03-20 19:09:39,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 245 transitions. [2022-03-20 19:09:39,606 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 245 transitions. Word has length 239 [2022-03-20 19:09:39,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:09:39,607 INFO L478 AbstractCegarLoop]: Abstraction has 243 states and 245 transitions. [2022-03-20 19:09:39,607 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 2.0085470085470085) internal successors, (235), 116 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) [2022-03-20 19:09:39,607 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 245 transitions. [2022-03-20 19:09:39,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2022-03-20 19:09:39,607 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:09:39,607 INFO L499 BasicCegarLoop]: trace histogram [115, 114, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:09:39,624 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2022-03-20 19:09:39,823 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 [2022-03-20 19:09:39,823 INFO L403 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:09:39,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:09:39,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1109949944, now seen corresponding path program 227 times [2022-03-20 19:09:39,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:09:39,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [525026212] [2022-03-20 19:09:40,010 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:09:40,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1233888464, now seen corresponding path program 1 times [2022-03-20 19:09:40,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:09:40,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655644371] [2022-03-20 19:09:40,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:09:40,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:09:40,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:09:40,013 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:09:40,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:09:40,014 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:09:40,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1109949944, now seen corresponding path program 228 times [2022-03-20 19:09:40,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:09:40,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902206270] [2022-03-20 19:09:40,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:09:40,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:09:40,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:09:42,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:09:42,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:09:42,472 INFO L134 CoverageAnalysis]: Checked inductivity of 13225 backedges. 115 proven. 13110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:09:42,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:09:42,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902206270] [2022-03-20 19:09:42,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902206270] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:09:42,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269469460] [2022-03-20 19:09:42,472 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 19:09:42,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:09:42,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:09:42,474 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) [2022-03-20 19:09:42,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-03-20 19:09:42,507 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 19:09:42,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:09:42,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 19:09:42,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:09:42,711 INFO L134 CoverageAnalysis]: Checked inductivity of 13225 backedges. 342 proven. 1 refuted. 0 times theorem prover too weak. 12882 trivial. 0 not checked. [2022-03-20 19:09:42,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:09:42,893 INFO L134 CoverageAnalysis]: Checked inductivity of 13225 backedges. 342 proven. 1 refuted. 0 times theorem prover too weak. 12882 trivial. 0 not checked. [2022-03-20 19:09:42,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269469460] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:09:42,893 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:09:42,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [118, 4, 4] total 122 [2022-03-20 19:09:42,893 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:09:42,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [525026212] [2022-03-20 19:09:42,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [525026212] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:09:42,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:09:42,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2022-03-20 19:09:42,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565265925] [2022-03-20 19:09:42,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:09:42,894 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-03-20 19:09:42,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:09:42,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-03-20 19:09:42,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7262, Invalid=7500, Unknown=0, NotChecked=0, Total=14762 [2022-03-20 19:09:42,896 INFO L87 Difference]: Start difference. First operand 243 states and 245 transitions. Second operand has 118 states, 118 states have (on average 2.0084745762711864) internal successors, (237), 117 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) [2022-03-20 19:09:46,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:09:46,038 INFO L93 Difference]: Finished difference Result 252 states and 256 transitions. [2022-03-20 19:09:46,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-03-20 19:09:46,038 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 2.0084745762711864) internal successors, (237), 117 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 [2022-03-20 19:09:46,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:09:46,039 INFO L225 Difference]: With dead ends: 252 [2022-03-20 19:09:46,039 INFO L226 Difference]: Without dead ends: 245 [2022-03-20 19:09:46,041 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 715 GetRequests, 480 SyntacticMatches, 0 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6669 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=21292, Invalid=34640, Unknown=0, NotChecked=0, Total=55932 [2022-03-20 19:09:46,041 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 123 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 19:09:46,041 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 39 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 19:09:46,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-03-20 19:09:46,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 245. [2022-03-20 19:09:46,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 240 states have (on average 1.0125) internal successors, (243), 240 states have internal predecessors, (243), 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) [2022-03-20 19:09:46,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 247 transitions. [2022-03-20 19:09:46,047 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 247 transitions. Word has length 241 [2022-03-20 19:09:46,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:09:46,048 INFO L478 AbstractCegarLoop]: Abstraction has 245 states and 247 transitions. [2022-03-20 19:09:46,049 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 2.0084745762711864) internal successors, (237), 117 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) [2022-03-20 19:09:46,049 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 247 transitions. [2022-03-20 19:09:46,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-03-20 19:09:46,049 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:09:46,049 INFO L499 BasicCegarLoop]: trace histogram [116, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:09:46,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2022-03-20 19:09:46,265 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 [2022-03-20 19:09:46,266 INFO L403 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:09:46,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:09:46,266 INFO L85 PathProgramCache]: Analyzing trace with hash 402377637, now seen corresponding path program 229 times [2022-03-20 19:09:46,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:09:46,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1719012677] [2022-03-20 19:09:46,422 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:09:46,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1292993808, now seen corresponding path program 1 times [2022-03-20 19:09:46,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:09:46,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455092772] [2022-03-20 19:09:46,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:09:46,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:09:46,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:09:46,425 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:09:46,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:09:46,428 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:09:46,428 INFO L85 PathProgramCache]: Analyzing trace with hash 402377637, now seen corresponding path program 230 times [2022-03-20 19:09:46,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:09:46,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103122226] [2022-03-20 19:09:46,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:09:46,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:09:46,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:09:48,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:09:48,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:09:48,763 INFO L134 CoverageAnalysis]: Checked inductivity of 13456 backedges. 116 proven. 13340 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:09:48,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:09:48,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103122226] [2022-03-20 19:09:48,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103122226] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:09:48,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159494729] [2022-03-20 19:09:48,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:09:48,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:09:48,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:09:48,765 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) [2022-03-20 19:09:48,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-03-20 19:09:48,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:09:48,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:09:48,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 117 conjunts are in the unsatisfiable core [2022-03-20 19:09:48,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:09:49,224 INFO L134 CoverageAnalysis]: Checked inductivity of 13456 backedges. 116 proven. 13340 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:09:49,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:09:56,788 INFO L134 CoverageAnalysis]: Checked inductivity of 13456 backedges. 116 proven. 13340 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:09:56,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159494729] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:09:56,788 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:09:56,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [119, 118, 118] total 236 [2022-03-20 19:09:56,788 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:09:56,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1719012677] [2022-03-20 19:09:56,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1719012677] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:09:56,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:09:56,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [119] imperfect sequences [] total 119 [2022-03-20 19:09:56,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934399773] [2022-03-20 19:09:56,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:09:56,789 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-03-20 19:09:56,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:09:56,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-03-20 19:09:56,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27497, Invalid=27963, Unknown=0, NotChecked=0, Total=55460 [2022-03-20 19:09:56,793 INFO L87 Difference]: Start difference. First operand 245 states and 247 transitions. Second operand has 119 states, 119 states have (on average 2.008403361344538) internal successors, (239), 118 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) [2022-03-20 19:10:01,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:10:01,256 INFO L93 Difference]: Finished difference Result 254 states and 258 transitions. [2022-03-20 19:10:01,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-03-20 19:10:01,256 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 2.008403361344538) internal successors, (239), 118 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 [2022-03-20 19:10:01,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:10:01,257 INFO L225 Difference]: With dead ends: 254 [2022-03-20 19:10:01,257 INFO L226 Difference]: Without dead ends: 247 [2022-03-20 19:10:01,260 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 721 GetRequests, 371 SyntacticMatches, 0 SemanticMatches, 350 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7359 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=54758, Invalid=68794, Unknown=0, NotChecked=0, Total=123552 [2022-03-20 19:10:01,261 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 124 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 19:10:01,261 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 29 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 19:10:01,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-03-20 19:10:01,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2022-03-20 19:10:01,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 242 states have (on average 1.012396694214876) internal successors, (245), 242 states have internal predecessors, (245), 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) [2022-03-20 19:10:01,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 249 transitions. [2022-03-20 19:10:01,267 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 249 transitions. Word has length 243 [2022-03-20 19:10:01,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:10:01,267 INFO L478 AbstractCegarLoop]: Abstraction has 247 states and 249 transitions. [2022-03-20 19:10:01,268 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 2.008403361344538) internal successors, (239), 118 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) [2022-03-20 19:10:01,268 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 249 transitions. [2022-03-20 19:10:01,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2022-03-20 19:10:01,268 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:10:01,268 INFO L499 BasicCegarLoop]: trace histogram [117, 116, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:10:01,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2022-03-20 19:10:01,483 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 [2022-03-20 19:10:01,483 INFO L403 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:10:01,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:10:01,484 INFO L85 PathProgramCache]: Analyzing trace with hash 2050236930, now seen corresponding path program 231 times [2022-03-20 19:10:01,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:01,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [725241558] [2022-03-20 19:10:01,626 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:10:01,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1352099152, now seen corresponding path program 1 times [2022-03-20 19:10:01,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:10:01,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985041602] [2022-03-20 19:10:01,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:10:01,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:10:01,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:10:01,629 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:10:01,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:10:01,630 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:10:01,630 INFO L85 PathProgramCache]: Analyzing trace with hash 2050236930, now seen corresponding path program 232 times [2022-03-20 19:10:01,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:10:01,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673751592] [2022-03-20 19:10:01,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:10:01,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:10:01,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:04,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:10:04,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:04,098 INFO L134 CoverageAnalysis]: Checked inductivity of 13689 backedges. 117 proven. 13572 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:10:04,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:10:04,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673751592] [2022-03-20 19:10:04,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673751592] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:10:04,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629340606] [2022-03-20 19:10:04,099 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:10:04,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:10:04,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:10:04,100 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) [2022-03-20 19:10:04,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-03-20 19:10:04,167 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:10:04,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:10:04,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 118 conjunts are in the unsatisfiable core [2022-03-20 19:10:04,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:10:04,573 INFO L134 CoverageAnalysis]: Checked inductivity of 13689 backedges. 117 proven. 13572 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:10:04,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:10:16,655 INFO L134 CoverageAnalysis]: Checked inductivity of 13689 backedges. 117 proven. 13572 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:10:16,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629340606] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:10:16,655 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:10:16,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [120, 119, 119] total 238 [2022-03-20 19:10:16,655 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:10:16,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [725241558] [2022-03-20 19:10:16,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [725241558] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:10:16,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:10:16,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2022-03-20 19:10:16,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471860913] [2022-03-20 19:10:16,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:10:16,656 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-03-20 19:10:16,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:16,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-03-20 19:10:16,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27968, Invalid=28438, Unknown=0, NotChecked=0, Total=56406 [2022-03-20 19:10:16,660 INFO L87 Difference]: Start difference. First operand 247 states and 249 transitions. Second operand has 120 states, 120 states have (on average 2.0083333333333333) internal successors, (241), 119 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) [2022-03-20 19:10:21,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:10:21,892 INFO L93 Difference]: Finished difference Result 256 states and 260 transitions. [2022-03-20 19:10:21,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-03-20 19:10:21,893 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 2.0083333333333333) internal successors, (241), 119 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 [2022-03-20 19:10:21,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:10:21,893 INFO L225 Difference]: With dead ends: 256 [2022-03-20 19:10:21,893 INFO L226 Difference]: Without dead ends: 249 [2022-03-20 19:10:21,898 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 727 GetRequests, 374 SyntacticMatches, 0 SemanticMatches, 353 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7481 ImplicationChecksByTransitivity, 18.8s TimeCoverageRelationStatistics Valid=55698, Invalid=69972, Unknown=0, NotChecked=0, Total=125670 [2022-03-20 19:10:21,898 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 125 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 19:10:21,898 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 49 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 19:10:21,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-03-20 19:10:21,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2022-03-20 19:10:21,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 244 states have (on average 1.0122950819672132) internal successors, (247), 244 states have internal predecessors, (247), 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) [2022-03-20 19:10:21,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 251 transitions. [2022-03-20 19:10:21,905 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 251 transitions. Word has length 245 [2022-03-20 19:10:21,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:10:21,905 INFO L478 AbstractCegarLoop]: Abstraction has 249 states and 251 transitions. [2022-03-20 19:10:21,905 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 2.0083333333333333) internal successors, (241), 119 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) [2022-03-20 19:10:21,905 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 251 transitions. [2022-03-20 19:10:21,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2022-03-20 19:10:21,905 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:10:21,905 INFO L499 BasicCegarLoop]: trace histogram [118, 117, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:10:21,922 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2022-03-20 19:10:22,119 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 [2022-03-20 19:10:22,123 INFO L403 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:10:22,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:10:22,123 INFO L85 PathProgramCache]: Analyzing trace with hash 800085279, now seen corresponding path program 233 times [2022-03-20 19:10:22,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:22,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [656945690] [2022-03-20 19:10:22,280 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:10:22,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1411204496, now seen corresponding path program 1 times [2022-03-20 19:10:22,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:10:22,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420651089] [2022-03-20 19:10:22,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:10:22,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:10:22,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:10:22,282 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:10:22,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:10:22,286 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:10:22,286 INFO L85 PathProgramCache]: Analyzing trace with hash 800085279, now seen corresponding path program 234 times [2022-03-20 19:10:22,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:10:22,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81071685] [2022-03-20 19:10:22,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:10:22,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:10:22,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:24,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:10:24,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:24,744 INFO L134 CoverageAnalysis]: Checked inductivity of 13924 backedges. 118 proven. 13806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:10:24,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:10:24,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81071685] [2022-03-20 19:10:24,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81071685] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:10:24,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98079562] [2022-03-20 19:10:24,744 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 19:10:24,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:10:24,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:10:24,746 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) [2022-03-20 19:10:24,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-03-20 19:10:24,779 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 19:10:24,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:10:24,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 19:10:24,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:10:24,987 INFO L134 CoverageAnalysis]: Checked inductivity of 13924 backedges. 351 proven. 1 refuted. 0 times theorem prover too weak. 13572 trivial. 0 not checked. [2022-03-20 19:10:24,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:10:25,175 INFO L134 CoverageAnalysis]: Checked inductivity of 13924 backedges. 351 proven. 1 refuted. 0 times theorem prover too weak. 13572 trivial. 0 not checked. [2022-03-20 19:10:25,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98079562] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:10:25,175 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:10:25,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [121, 4, 4] total 125 [2022-03-20 19:10:25,175 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:10:25,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [656945690] [2022-03-20 19:10:25,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [656945690] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:10:25,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:10:25,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [121] imperfect sequences [] total 121 [2022-03-20 19:10:25,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848304760] [2022-03-20 19:10:25,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:10:25,176 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-03-20 19:10:25,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:25,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-03-20 19:10:25,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7628, Invalid=7872, Unknown=0, NotChecked=0, Total=15500 [2022-03-20 19:10:25,179 INFO L87 Difference]: Start difference. First operand 249 states and 251 transitions. Second operand has 121 states, 121 states have (on average 2.0082644628099175) internal successors, (243), 120 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) [2022-03-20 19:10:28,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:10:28,492 INFO L93 Difference]: Finished difference Result 258 states and 262 transitions. [2022-03-20 19:10:28,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-03-20 19:10:28,492 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 2.0082644628099175) internal successors, (243), 120 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 [2022-03-20 19:10:28,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:10:28,493 INFO L225 Difference]: With dead ends: 258 [2022-03-20 19:10:28,493 INFO L226 Difference]: Without dead ends: 251 [2022-03-20 19:10:28,496 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 733 GetRequests, 492 SyntacticMatches, 0 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7020 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=22378, Invalid=36428, Unknown=0, NotChecked=0, Total=58806 [2022-03-20 19:10:28,496 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 126 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 19:10:28,496 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 44 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 19:10:28,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-03-20 19:10:28,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2022-03-20 19:10:28,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 246 states have (on average 1.0121951219512195) internal successors, (249), 246 states have internal predecessors, (249), 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) [2022-03-20 19:10:28,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 253 transitions. [2022-03-20 19:10:28,503 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 253 transitions. Word has length 247 [2022-03-20 19:10:28,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:10:28,503 INFO L478 AbstractCegarLoop]: Abstraction has 251 states and 253 transitions. [2022-03-20 19:10:28,503 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 2.0082644628099175) internal successors, (243), 120 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) [2022-03-20 19:10:28,503 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 253 transitions. [2022-03-20 19:10:28,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2022-03-20 19:10:28,503 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:10:28,503 INFO L499 BasicCegarLoop]: trace histogram [119, 118, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:10:28,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2022-03-20 19:10:28,711 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 [2022-03-20 19:10:28,711 INFO L403 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:10:28,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:10:28,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1995191548, now seen corresponding path program 235 times [2022-03-20 19:10:28,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:28,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1664180394] [2022-03-20 19:10:28,956 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:10:28,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1470309840, now seen corresponding path program 1 times [2022-03-20 19:10:28,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:10:28,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944044638] [2022-03-20 19:10:28,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:10:28,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:10:28,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:10:28,958 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:10:28,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:10:28,960 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:10:28,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1995191548, now seen corresponding path program 236 times [2022-03-20 19:10:28,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:10:28,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216555253] [2022-03-20 19:10:28,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:10:28,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:10:28,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:32,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:10:32,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:32,100 INFO L134 CoverageAnalysis]: Checked inductivity of 14161 backedges. 119 proven. 14042 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:10:32,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:10:32,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216555253] [2022-03-20 19:10:32,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216555253] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:10:32,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065135886] [2022-03-20 19:10:32,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:10:32,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:10:32,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:10:32,102 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) [2022-03-20 19:10:32,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-03-20 19:10:32,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:10:32,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:10:32,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 120 conjunts are in the unsatisfiable core [2022-03-20 19:10:32,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:10:32,382 INFO L134 CoverageAnalysis]: Checked inductivity of 14161 backedges. 119 proven. 14042 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:10:32,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:10:39,706 INFO L134 CoverageAnalysis]: Checked inductivity of 14161 backedges. 119 proven. 14042 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:10:39,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065135886] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:10:39,706 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:10:39,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [122, 121, 121] total 242 [2022-03-20 19:10:39,707 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:10:39,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1664180394] [2022-03-20 19:10:39,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1664180394] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:10:39,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:10:39,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [122] imperfect sequences [] total 122 [2022-03-20 19:10:39,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410541379] [2022-03-20 19:10:39,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:10:39,707 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-03-20 19:10:39,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:39,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-03-20 19:10:39,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28922, Invalid=29400, Unknown=0, NotChecked=0, Total=58322 [2022-03-20 19:10:39,710 INFO L87 Difference]: Start difference. First operand 251 states and 253 transitions. Second operand has 122 states, 122 states have (on average 2.0081967213114753) internal successors, (245), 121 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) [2022-03-20 19:10:43,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:10:43,029 INFO L93 Difference]: Finished difference Result 260 states and 264 transitions. [2022-03-20 19:10:43,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-03-20 19:10:43,029 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 2.0081967213114753) internal successors, (245), 121 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 [2022-03-20 19:10:43,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:10:43,030 INFO L225 Difference]: With dead ends: 260 [2022-03-20 19:10:43,030 INFO L226 Difference]: Without dead ends: 253 [2022-03-20 19:10:43,033 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 739 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 359 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7728 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=57602, Invalid=72358, Unknown=0, NotChecked=0, Total=129960 [2022-03-20 19:10:43,034 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 127 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 19:10:43,034 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 59 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 19:10:43,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-03-20 19:10:43,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2022-03-20 19:10:43,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 248 states have (on average 1.0120967741935485) internal successors, (251), 248 states have internal predecessors, (251), 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) [2022-03-20 19:10:43,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 255 transitions. [2022-03-20 19:10:43,040 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 255 transitions. Word has length 249 [2022-03-20 19:10:43,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:10:43,041 INFO L478 AbstractCegarLoop]: Abstraction has 253 states and 255 transitions. [2022-03-20 19:10:43,041 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 2.0081967213114753) internal successors, (245), 121 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) [2022-03-20 19:10:43,041 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 255 transitions. [2022-03-20 19:10:43,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2022-03-20 19:10:43,041 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:10:43,041 INFO L499 BasicCegarLoop]: trace histogram [120, 119, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:10:43,057 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2022-03-20 19:10:43,257 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 [2022-03-20 19:10:43,258 INFO L403 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:10:43,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:10:43,258 INFO L85 PathProgramCache]: Analyzing trace with hash -558919271, now seen corresponding path program 237 times [2022-03-20 19:10:43,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:43,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1705349876] [2022-03-20 19:10:43,523 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:10:43,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1529415184, now seen corresponding path program 1 times [2022-03-20 19:10:43,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:10:43,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133850784] [2022-03-20 19:10:43,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:10:43,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:10:43,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:10:43,525 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:10:43,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:10:43,526 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:10:43,526 INFO L85 PathProgramCache]: Analyzing trace with hash -558919271, now seen corresponding path program 238 times [2022-03-20 19:10:43,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:10:43,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170247612] [2022-03-20 19:10:43,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:10:43,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:10:43,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:45,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:10:45,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:45,977 INFO L134 CoverageAnalysis]: Checked inductivity of 14400 backedges. 120 proven. 14280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:10:45,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:10:45,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170247612] [2022-03-20 19:10:45,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170247612] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:10:45,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303839221] [2022-03-20 19:10:45,977 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:10:45,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:10:45,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:10:45,978 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) [2022-03-20 19:10:45,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-03-20 19:10:46,041 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:10:46,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:10:46,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 121 conjunts are in the unsatisfiable core [2022-03-20 19:10:46,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:10:46,246 INFO L134 CoverageAnalysis]: Checked inductivity of 14400 backedges. 120 proven. 14280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:10:46,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:10:54,441 INFO L134 CoverageAnalysis]: Checked inductivity of 14400 backedges. 120 proven. 14280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:10:54,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303839221] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:10:54,442 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:10:54,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [123, 122, 122] total 244 [2022-03-20 19:10:54,442 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:10:54,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1705349876] [2022-03-20 19:10:54,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1705349876] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:10:54,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:10:54,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [123] imperfect sequences [] total 123 [2022-03-20 19:10:54,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877294538] [2022-03-20 19:10:54,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:10:54,442 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-03-20 19:10:54,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:54,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-03-20 19:10:54,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29405, Invalid=29887, Unknown=0, NotChecked=0, Total=59292 [2022-03-20 19:10:54,447 INFO L87 Difference]: Start difference. First operand 253 states and 255 transitions. Second operand has 123 states, 123 states have (on average 2.008130081300813) internal successors, (247), 122 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) [2022-03-20 19:10:57,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:10:57,984 INFO L93 Difference]: Finished difference Result 262 states and 266 transitions. [2022-03-20 19:10:57,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-03-20 19:10:57,985 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 2.008130081300813) internal successors, (247), 122 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 [2022-03-20 19:10:57,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:10:57,985 INFO L225 Difference]: With dead ends: 262 [2022-03-20 19:10:57,985 INFO L226 Difference]: Without dead ends: 255 [2022-03-20 19:10:58,004 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 745 GetRequests, 383 SyntacticMatches, 0 SemanticMatches, 362 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7853 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=58566, Invalid=73566, Unknown=0, NotChecked=0, Total=132132 [2022-03-20 19:10:58,015 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 128 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 19:10:58,015 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 69 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 19:10:58,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-03-20 19:10:58,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 255. [2022-03-20 19:10:58,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 250 states have (on average 1.012) internal successors, (253), 250 states have internal predecessors, (253), 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) [2022-03-20 19:10:58,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 257 transitions. [2022-03-20 19:10:58,022 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 257 transitions. Word has length 251 [2022-03-20 19:10:58,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:10:58,022 INFO L478 AbstractCegarLoop]: Abstraction has 255 states and 257 transitions. [2022-03-20 19:10:58,022 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 2.008130081300813) internal successors, (247), 122 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) [2022-03-20 19:10:58,022 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 257 transitions. [2022-03-20 19:10:58,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-03-20 19:10:58,023 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:10:58,023 INFO L499 BasicCegarLoop]: trace histogram [121, 120, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:10:58,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2022-03-20 19:10:58,252 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 [2022-03-20 19:10:58,252 INFO L403 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:10:58,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:10:58,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1661876982, now seen corresponding path program 239 times [2022-03-20 19:10:58,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:58,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1461890983] [2022-03-20 19:10:58,429 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:10:58,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1588520528, now seen corresponding path program 1 times [2022-03-20 19:10:58,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:10:58,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393774099] [2022-03-20 19:10:58,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:10:58,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:10:58,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:10:58,431 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:10:58,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:10:58,432 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:10:58,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1661876982, now seen corresponding path program 240 times [2022-03-20 19:10:58,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:10:58,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743725982] [2022-03-20 19:10:58,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:10:58,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:10:58,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:11:02,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:11:02,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:11:02,689 INFO L134 CoverageAnalysis]: Checked inductivity of 14641 backedges. 121 proven. 14520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:11:02,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:11:02,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743725982] [2022-03-20 19:11:02,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743725982] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:11:02,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089833751] [2022-03-20 19:11:02,689 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 19:11:02,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:11:02,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:11:02,691 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) [2022-03-20 19:11:02,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-03-20 19:11:02,723 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 19:11:02,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:11:02,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 19:11:02,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:11:02,935 INFO L134 CoverageAnalysis]: Checked inductivity of 14641 backedges. 360 proven. 1 refuted. 0 times theorem prover too weak. 14280 trivial. 0 not checked. [2022-03-20 19:11:02,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:11:03,124 INFO L134 CoverageAnalysis]: Checked inductivity of 14641 backedges. 360 proven. 1 refuted. 0 times theorem prover too weak. 14280 trivial. 0 not checked. [2022-03-20 19:11:03,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089833751] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:11:03,125 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:11:03,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [124, 4, 4] total 128 [2022-03-20 19:11:03,125 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:11:03,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1461890983] [2022-03-20 19:11:03,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1461890983] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:11:03,125 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:11:03,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [124] imperfect sequences [] total 124 [2022-03-20 19:11:03,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131997802] [2022-03-20 19:11:03,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:11:03,125 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-03-20 19:11:03,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:11:03,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-03-20 19:11:03,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8003, Invalid=8253, Unknown=0, NotChecked=0, Total=16256 [2022-03-20 19:11:03,127 INFO L87 Difference]: Start difference. First operand 255 states and 257 transitions. Second operand has 124 states, 124 states have (on average 2.0080645161290325) internal successors, (249), 123 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) [2022-03-20 19:11:06,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:11:06,543 INFO L93 Difference]: Finished difference Result 264 states and 268 transitions. [2022-03-20 19:11:06,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-03-20 19:11:06,544 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 2.0080645161290325) internal successors, (249), 123 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 [2022-03-20 19:11:06,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:11:06,544 INFO L225 Difference]: With dead ends: 264 [2022-03-20 19:11:06,544 INFO L226 Difference]: Without dead ends: 257 [2022-03-20 19:11:06,547 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 751 GetRequests, 504 SyntacticMatches, 0 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7380 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=23491, Invalid=38261, Unknown=0, NotChecked=0, Total=61752 [2022-03-20 19:11:06,547 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 129 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 19:11:06,547 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 29 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 19:11:06,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-03-20 19:11:06,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 257. [2022-03-20 19:11:06,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 252 states have (on average 1.0119047619047619) internal successors, (255), 252 states have internal predecessors, (255), 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) [2022-03-20 19:11:06,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 259 transitions. [2022-03-20 19:11:06,553 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 259 transitions. Word has length 253 [2022-03-20 19:11:06,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:11:06,553 INFO L478 AbstractCegarLoop]: Abstraction has 257 states and 259 transitions. [2022-03-20 19:11:06,553 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 2.0080645161290325) internal successors, (249), 123 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) [2022-03-20 19:11:06,554 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 259 transitions. [2022-03-20 19:11:06,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2022-03-20 19:11:06,554 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:11:06,554 INFO L499 BasicCegarLoop]: trace histogram [122, 121, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:11:06,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2022-03-20 19:11:06,770 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 [2022-03-20 19:11:06,770 INFO L403 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:11:06,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:11:06,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1248330003, now seen corresponding path program 241 times [2022-03-20 19:11:06,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:11:06,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1222538509] [2022-03-20 19:11:06,948 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:11:06,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1647625872, now seen corresponding path program 1 times [2022-03-20 19:11:06,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:11:06,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81918175] [2022-03-20 19:11:06,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:11:06,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:11:06,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:11:06,950 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:11:06,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:11:06,952 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:11:06,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1248330003, now seen corresponding path program 242 times [2022-03-20 19:11:06,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:11:06,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750254865] [2022-03-20 19:11:06,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:11:06,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:11:06,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:11:10,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:11:10,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:11:10,938 INFO L134 CoverageAnalysis]: Checked inductivity of 14884 backedges. 122 proven. 14762 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:11:10,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:11:10,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750254865] [2022-03-20 19:11:10,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750254865] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:11:10,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193345017] [2022-03-20 19:11:10,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:11:10,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:11:10,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:11:10,939 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) [2022-03-20 19:11:10,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-03-20 19:11:11,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:11:11,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:11:11,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 123 conjunts are in the unsatisfiable core [2022-03-20 19:11:11,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:11:11,438 INFO L134 CoverageAnalysis]: Checked inductivity of 14884 backedges. 122 proven. 14762 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:11:11,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:11:20,324 INFO L134 CoverageAnalysis]: Checked inductivity of 14884 backedges. 122 proven. 14762 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:11:20,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193345017] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:11:20,324 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:11:20,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [125, 124, 124] total 248 [2022-03-20 19:11:20,324 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:11:20,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1222538509] [2022-03-20 19:11:20,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1222538509] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:11:20,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:11:20,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [125] imperfect sequences [] total 125 [2022-03-20 19:11:20,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424168741] [2022-03-20 19:11:20,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:11:20,325 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2022-03-20 19:11:20,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:11:20,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2022-03-20 19:11:20,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30383, Invalid=30873, Unknown=0, NotChecked=0, Total=61256 [2022-03-20 19:11:20,330 INFO L87 Difference]: Start difference. First operand 257 states and 259 transitions. Second operand has 125 states, 125 states have (on average 2.008) internal successors, (251), 124 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) [2022-03-20 19:11:23,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:11:23,835 INFO L93 Difference]: Finished difference Result 266 states and 270 transitions. [2022-03-20 19:11:23,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-03-20 19:11:23,836 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 2.008) internal successors, (251), 124 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 [2022-03-20 19:11:23,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:11:23,836 INFO L225 Difference]: With dead ends: 266 [2022-03-20 19:11:23,836 INFO L226 Difference]: Without dead ends: 259 [2022-03-20 19:11:23,842 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 757 GetRequests, 389 SyntacticMatches, 0 SemanticMatches, 368 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8106 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=60518, Invalid=76012, Unknown=0, NotChecked=0, Total=136530 [2022-03-20 19:11:23,842 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 130 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 19:11:23,842 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 34 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 19:11:23,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-03-20 19:11:23,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2022-03-20 19:11:23,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 254 states have (on average 1.0118110236220472) internal successors, (257), 254 states have internal predecessors, (257), 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) [2022-03-20 19:11:23,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 261 transitions. [2022-03-20 19:11:23,849 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 261 transitions. Word has length 255 [2022-03-20 19:11:23,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:11:23,849 INFO L478 AbstractCegarLoop]: Abstraction has 259 states and 261 transitions. [2022-03-20 19:11:23,849 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 2.008) internal successors, (251), 124 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) [2022-03-20 19:11:23,849 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 261 transitions. [2022-03-20 19:11:23,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2022-03-20 19:11:23,849 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:11:23,850 INFO L499 BasicCegarLoop]: trace histogram [123, 122, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:11:23,866 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2022-03-20 19:11:24,066 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 [2022-03-20 19:11:24,067 INFO L403 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:11:24,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:11:24,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1033325584, now seen corresponding path program 243 times [2022-03-20 19:11:24,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:11:24,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1079293305] [2022-03-20 19:11:24,284 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:11:24,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1706731216, now seen corresponding path program 1 times [2022-03-20 19:11:24,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:11:24,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531251840] [2022-03-20 19:11:24,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:11:24,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:11:24,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:11:24,286 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:11:24,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:11:24,287 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:11:24,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1033325584, now seen corresponding path program 244 times [2022-03-20 19:11:24,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:11:24,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336301308] [2022-03-20 19:11:24,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:11:24,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:11:24,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:11:27,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:11:27,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:11:27,082 INFO L134 CoverageAnalysis]: Checked inductivity of 15129 backedges. 123 proven. 15006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:11:27,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:11:27,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336301308] [2022-03-20 19:11:27,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336301308] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:11:27,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590323976] [2022-03-20 19:11:27,083 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:11:27,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:11:27,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:11:27,084 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) [2022-03-20 19:11:27,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-03-20 19:11:27,162 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:11:27,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:11:27,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 124 conjunts are in the unsatisfiable core [2022-03-20 19:11:27,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:11:27,376 INFO L134 CoverageAnalysis]: Checked inductivity of 15129 backedges. 123 proven. 15006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:11:27,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:11:35,028 INFO L134 CoverageAnalysis]: Checked inductivity of 15129 backedges. 123 proven. 15006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:11:35,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590323976] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:11:35,028 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:11:35,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [126, 125, 125] total 250 [2022-03-20 19:11:35,028 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:11:35,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1079293305] [2022-03-20 19:11:35,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1079293305] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:11:35,028 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:11:35,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [126] imperfect sequences [] total 126 [2022-03-20 19:11:35,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097785894] [2022-03-20 19:11:35,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:11:35,029 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-03-20 19:11:35,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:11:35,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-03-20 19:11:35,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30878, Invalid=31372, Unknown=0, NotChecked=0, Total=62250 [2022-03-20 19:11:35,033 INFO L87 Difference]: Start difference. First operand 259 states and 261 transitions. Second operand has 126 states, 126 states have (on average 2.007936507936508) internal successors, (253), 125 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) [2022-03-20 19:11:38,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:11:38,654 INFO L93 Difference]: Finished difference Result 268 states and 272 transitions. [2022-03-20 19:11:38,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-03-20 19:11:38,654 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 2.007936507936508) internal successors, (253), 125 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 [2022-03-20 19:11:38,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:11:38,655 INFO L225 Difference]: With dead ends: 268 [2022-03-20 19:11:38,655 INFO L226 Difference]: Without dead ends: 261 [2022-03-20 19:11:38,660 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 763 GetRequests, 392 SyntacticMatches, 0 SemanticMatches, 371 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8234 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=61506, Invalid=77250, Unknown=0, NotChecked=0, Total=138756 [2022-03-20 19:11:38,660 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 131 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 19:11:38,661 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 44 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 19:11:38,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-03-20 19:11:38,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2022-03-20 19:11:38,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 256 states have (on average 1.01171875) internal successors, (259), 256 states have internal predecessors, (259), 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) [2022-03-20 19:11:38,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 263 transitions. [2022-03-20 19:11:38,667 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 263 transitions. Word has length 257 [2022-03-20 19:11:38,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:11:38,667 INFO L478 AbstractCegarLoop]: Abstraction has 261 states and 263 transitions. [2022-03-20 19:11:38,667 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 2.007936507936508) internal successors, (253), 125 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) [2022-03-20 19:11:38,667 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 263 transitions. [2022-03-20 19:11:38,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2022-03-20 19:11:38,668 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:11:38,668 INFO L499 BasicCegarLoop]: trace histogram [124, 123, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:11:38,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2022-03-20 19:11:38,884 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 [2022-03-20 19:11:38,885 INFO L403 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:11:38,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:11:38,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1023943565, now seen corresponding path program 245 times [2022-03-20 19:11:38,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:11:38,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [171044879] [2022-03-20 19:11:39,071 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:11:39,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1765836560, now seen corresponding path program 1 times [2022-03-20 19:11:39,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:11:39,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040248722] [2022-03-20 19:11:39,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:11:39,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:11:39,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:11:39,073 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:11:39,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:11:39,075 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:11:39,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1023943565, now seen corresponding path program 246 times [2022-03-20 19:11:39,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:11:39,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707971253] [2022-03-20 19:11:39,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:11:39,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:11:39,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:11:41,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:11:41,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:11:41,783 INFO L134 CoverageAnalysis]: Checked inductivity of 15376 backedges. 124 proven. 15252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:11:41,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:11:41,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707971253] [2022-03-20 19:11:41,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707971253] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:11:41,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030978661] [2022-03-20 19:11:41,783 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 19:11:41,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:11:41,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:11:41,784 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) [2022-03-20 19:11:41,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-03-20 19:11:41,817 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 19:11:41,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:11:41,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 19:11:41,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:11:42,042 INFO L134 CoverageAnalysis]: Checked inductivity of 15376 backedges. 369 proven. 1 refuted. 0 times theorem prover too weak. 15006 trivial. 0 not checked. [2022-03-20 19:11:42,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:11:42,242 INFO L134 CoverageAnalysis]: Checked inductivity of 15376 backedges. 369 proven. 1 refuted. 0 times theorem prover too weak. 15006 trivial. 0 not checked. [2022-03-20 19:11:42,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030978661] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:11:42,243 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:11:42,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [127, 4, 4] total 131 [2022-03-20 19:11:42,243 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:11:42,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [171044879] [2022-03-20 19:11:42,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [171044879] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:11:42,243 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:11:42,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [127] imperfect sequences [] total 127 [2022-03-20 19:11:42,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304433787] [2022-03-20 19:11:42,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:11:42,243 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2022-03-20 19:11:42,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:11:42,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2022-03-20 19:11:42,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8387, Invalid=8643, Unknown=0, NotChecked=0, Total=17030 [2022-03-20 19:11:42,246 INFO L87 Difference]: Start difference. First operand 261 states and 263 transitions. Second operand has 127 states, 127 states have (on average 2.0078740157480315) internal successors, (255), 126 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) [2022-03-20 19:11:45,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:11:45,798 INFO L93 Difference]: Finished difference Result 270 states and 274 transitions. [2022-03-20 19:11:45,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-03-20 19:11:45,798 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 2.0078740157480315) internal successors, (255), 126 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 [2022-03-20 19:11:45,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:11:45,799 INFO L225 Difference]: With dead ends: 270 [2022-03-20 19:11:45,799 INFO L226 Difference]: Without dead ends: 263 [2022-03-20 19:11:45,801 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 769 GetRequests, 516 SyntacticMatches, 0 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7749 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=24631, Invalid=40139, Unknown=0, NotChecked=0, Total=64770 [2022-03-20 19:11:45,801 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 132 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 19:11:45,801 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 34 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 19:11:45,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-03-20 19:11:45,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2022-03-20 19:11:45,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 258 states have (on average 1.0116279069767442) internal successors, (261), 258 states have internal predecessors, (261), 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) [2022-03-20 19:11:45,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 265 transitions. [2022-03-20 19:11:45,808 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 265 transitions. Word has length 259 [2022-03-20 19:11:45,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:11:45,808 INFO L478 AbstractCegarLoop]: Abstraction has 263 states and 265 transitions. [2022-03-20 19:11:45,808 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 2.0078740157480315) internal successors, (255), 126 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) [2022-03-20 19:11:45,808 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 265 transitions. [2022-03-20 19:11:45,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2022-03-20 19:11:45,808 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:11:45,808 INFO L499 BasicCegarLoop]: trace histogram [125, 124, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:11:45,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2022-03-20 19:11:46,024 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 [2022-03-20 19:11:46,024 INFO L403 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:11:46,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:11:46,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1920327702, now seen corresponding path program 247 times [2022-03-20 19:11:46,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:11:46,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [836567427] [2022-03-20 19:11:46,228 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:11:46,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1824941904, now seen corresponding path program 1 times [2022-03-20 19:11:46,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:11:46,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829175608] [2022-03-20 19:11:46,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:11:46,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:11:46,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:11:46,230 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:11:46,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:11:46,231 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:11:46,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1920327702, now seen corresponding path program 248 times [2022-03-20 19:11:46,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:11:46,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347000765] [2022-03-20 19:11:46,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:11:46,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:11:46,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:11:48,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:11:48,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:11:48,946 INFO L134 CoverageAnalysis]: Checked inductivity of 15625 backedges. 125 proven. 15500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:11:48,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:11:48,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347000765] [2022-03-20 19:11:48,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347000765] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:11:48,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717244443] [2022-03-20 19:11:48,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:11:48,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:11:48,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:11:48,947 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) [2022-03-20 19:11:48,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-03-20 19:11:49,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:11:49,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:11:49,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 126 conjunts are in the unsatisfiable core [2022-03-20 19:11:49,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:11:49,245 INFO L134 CoverageAnalysis]: Checked inductivity of 15625 backedges. 125 proven. 15500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:11:49,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:12:03,483 INFO L134 CoverageAnalysis]: Checked inductivity of 15625 backedges. 125 proven. 15500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:12:03,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717244443] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:12:03,483 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:12:03,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [128, 127, 127] total 254 [2022-03-20 19:12:03,483 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:12:03,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [836567427] [2022-03-20 19:12:03,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [836567427] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:12:03,484 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:12:03,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [128] imperfect sequences [] total 128 [2022-03-20 19:12:03,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768979123] [2022-03-20 19:12:03,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:12:03,484 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-03-20 19:12:03,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:12:03,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-03-20 19:12:03,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31880, Invalid=32382, Unknown=0, NotChecked=0, Total=64262 [2022-03-20 19:12:03,488 INFO L87 Difference]: Start difference. First operand 263 states and 265 transitions. Second operand has 128 states, 128 states have (on average 2.0078125) internal successors, (257), 127 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) [2022-03-20 19:12:07,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:12:07,764 INFO L93 Difference]: Finished difference Result 272 states and 276 transitions. [2022-03-20 19:12:07,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-03-20 19:12:07,764 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 2.0078125) internal successors, (257), 127 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 [2022-03-20 19:12:07,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:12:07,765 INFO L225 Difference]: With dead ends: 272 [2022-03-20 19:12:07,765 INFO L226 Difference]: Without dead ends: 265 [2022-03-20 19:12:07,770 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 775 GetRequests, 398 SyntacticMatches, 0 SemanticMatches, 377 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8493 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=63506, Invalid=79756, Unknown=0, NotChecked=0, Total=143262 [2022-03-20 19:12:07,770 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 133 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 19:12:07,770 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 49 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 19:12:07,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-03-20 19:12:07,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2022-03-20 19:12:07,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 260 states have (on average 1.0115384615384615) internal successors, (263), 260 states have internal predecessors, (263), 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) [2022-03-20 19:12:07,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 267 transitions. [2022-03-20 19:12:07,777 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 267 transitions. Word has length 261 [2022-03-20 19:12:07,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:12:07,778 INFO L478 AbstractCegarLoop]: Abstraction has 265 states and 267 transitions. [2022-03-20 19:12:07,778 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 2.0078125) internal successors, (257), 127 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) [2022-03-20 19:12:07,778 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 267 transitions. [2022-03-20 19:12:07,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-03-20 19:12:07,779 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:12:07,779 INFO L499 BasicCegarLoop]: trace histogram [126, 125, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:12:07,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2022-03-20 19:12:07,982 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 [2022-03-20 19:12:07,983 INFO L403 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:12:07,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:12:07,983 INFO L85 PathProgramCache]: Analyzing trace with hash -981567225, now seen corresponding path program 249 times [2022-03-20 19:12:07,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:12:07,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [972504080] [2022-03-20 19:12:08,213 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:12:08,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1884047248, now seen corresponding path program 1 times [2022-03-20 19:12:08,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:12:08,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394886114] [2022-03-20 19:12:08,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:12:08,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:12:08,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:12:08,216 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:12:08,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:12:08,217 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:12:08,217 INFO L85 PathProgramCache]: Analyzing trace with hash -981567225, now seen corresponding path program 250 times [2022-03-20 19:12:08,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:12:08,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996353926] [2022-03-20 19:12:08,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:12:08,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:12:08,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:12:11,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:12:11,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:12:11,646 INFO L134 CoverageAnalysis]: Checked inductivity of 15876 backedges. 126 proven. 15750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:12:11,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:12:11,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996353926] [2022-03-20 19:12:11,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996353926] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:12:11,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002393011] [2022-03-20 19:12:11,647 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:12:11,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:12:11,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:12:11,648 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) [2022-03-20 19:12:11,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-03-20 19:12:11,722 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:12:11,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:12:11,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 127 conjunts are in the unsatisfiable core [2022-03-20 19:12:11,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:12:12,058 INFO L134 CoverageAnalysis]: Checked inductivity of 15876 backedges. 126 proven. 15750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:12:12,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:12:20,398 INFO L134 CoverageAnalysis]: Checked inductivity of 15876 backedges. 126 proven. 15750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:12:20,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002393011] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:12:20,398 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:12:20,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [129, 128, 128] total 256 [2022-03-20 19:12:20,399 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:12:20,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [972504080] [2022-03-20 19:12:20,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [972504080] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:12:20,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:12:20,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [129] imperfect sequences [] total 129 [2022-03-20 19:12:20,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133350618] [2022-03-20 19:12:20,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:12:20,404 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-03-20 19:12:20,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:12:20,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-03-20 19:12:20,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32387, Invalid=32893, Unknown=0, NotChecked=0, Total=65280 [2022-03-20 19:12:20,412 INFO L87 Difference]: Start difference. First operand 265 states and 267 transitions. Second operand has 129 states, 129 states have (on average 2.007751937984496) internal successors, (259), 128 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) [2022-03-20 19:12:24,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:12:24,279 INFO L93 Difference]: Finished difference Result 274 states and 278 transitions. [2022-03-20 19:12:24,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-03-20 19:12:24,280 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 2.007751937984496) internal successors, (259), 128 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 [2022-03-20 19:12:24,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:12:24,281 INFO L225 Difference]: With dead ends: 274 [2022-03-20 19:12:24,281 INFO L226 Difference]: Without dead ends: 267 [2022-03-20 19:12:24,288 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 781 GetRequests, 401 SyntacticMatches, 0 SemanticMatches, 380 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8624 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=64518, Invalid=81024, Unknown=0, NotChecked=0, Total=145542 [2022-03-20 19:12:24,289 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 134 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 19:12:24,290 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 39 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 19:12:24,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-03-20 19:12:24,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 267. [2022-03-20 19:12:24,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 262 states have (on average 1.0114503816793894) internal successors, (265), 262 states have internal predecessors, (265), 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) [2022-03-20 19:12:24,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 269 transitions. [2022-03-20 19:12:24,304 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 269 transitions. Word has length 263 [2022-03-20 19:12:24,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:12:24,305 INFO L478 AbstractCegarLoop]: Abstraction has 267 states and 269 transitions. [2022-03-20 19:12:24,305 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 2.007751937984496) internal successors, (259), 128 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) [2022-03-20 19:12:24,305 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 269 transitions. [2022-03-20 19:12:24,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2022-03-20 19:12:24,306 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:12:24,306 INFO L499 BasicCegarLoop]: trace histogram [127, 126, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:12:24,323 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2022-03-20 19:12:24,519 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 [2022-03-20 19:12:24,520 INFO L403 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:12:24,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:12:24,520 INFO L85 PathProgramCache]: Analyzing trace with hash -775880988, now seen corresponding path program 251 times [2022-03-20 19:12:24,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:12:24,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1607243106] [2022-03-20 19:12:24,692 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:12:24,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1943152592, now seen corresponding path program 1 times [2022-03-20 19:12:24,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:12:24,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256171605] [2022-03-20 19:12:24,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:12:24,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:12:24,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:12:24,694 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:12:24,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:12:24,700 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:12:24,700 INFO L85 PathProgramCache]: Analyzing trace with hash -775880988, now seen corresponding path program 252 times [2022-03-20 19:12:24,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:12:24,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702894418] [2022-03-20 19:12:24,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:12:24,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:12:24,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:12:27,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:12:27,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:12:27,608 INFO L134 CoverageAnalysis]: Checked inductivity of 16129 backedges. 127 proven. 16002 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:12:27,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:12:27,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702894418] [2022-03-20 19:12:27,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702894418] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:12:27,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723753874] [2022-03-20 19:12:27,609 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 19:12:27,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:12:27,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:12:27,610 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) [2022-03-20 19:12:27,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-03-20 19:12:27,643 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 19:12:27,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:12:27,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 19:12:27,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:12:27,857 INFO L134 CoverageAnalysis]: Checked inductivity of 16129 backedges. 378 proven. 1 refuted. 0 times theorem prover too weak. 15750 trivial. 0 not checked. [2022-03-20 19:12:27,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:12:28,050 INFO L134 CoverageAnalysis]: Checked inductivity of 16129 backedges. 378 proven. 1 refuted. 0 times theorem prover too weak. 15750 trivial. 0 not checked. [2022-03-20 19:12:28,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723753874] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:12:28,051 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:12:28,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [130, 4, 4] total 134 [2022-03-20 19:12:28,051 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:12:28,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1607243106] [2022-03-20 19:12:28,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1607243106] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:12:28,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:12:28,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [130] imperfect sequences [] total 130 [2022-03-20 19:12:28,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692084541] [2022-03-20 19:12:28,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:12:28,052 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-03-20 19:12:28,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:12:28,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-03-20 19:12:28,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8780, Invalid=9042, Unknown=0, NotChecked=0, Total=17822 [2022-03-20 19:12:28,054 INFO L87 Difference]: Start difference. First operand 267 states and 269 transitions. Second operand has 130 states, 130 states have (on average 2.0076923076923077) internal successors, (261), 129 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) [2022-03-20 19:12:31,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:12:31,757 INFO L93 Difference]: Finished difference Result 276 states and 280 transitions. [2022-03-20 19:12:31,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-03-20 19:12:31,757 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 2.0076923076923077) internal successors, (261), 129 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 [2022-03-20 19:12:31,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:12:31,759 INFO L225 Difference]: With dead ends: 276 [2022-03-20 19:12:31,759 INFO L226 Difference]: Without dead ends: 269 [2022-03-20 19:12:31,762 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 787 GetRequests, 528 SyntacticMatches, 0 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8127 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=25798, Invalid=42062, Unknown=0, NotChecked=0, Total=67860 [2022-03-20 19:12:31,762 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 135 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 19:12:31,762 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 54 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 19:12:31,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-03-20 19:12:31,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 269. [2022-03-20 19:12:31,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 264 states have (on average 1.0113636363636365) internal successors, (267), 264 states have internal predecessors, (267), 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) [2022-03-20 19:12:31,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 271 transitions. [2022-03-20 19:12:31,770 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 271 transitions. Word has length 265 [2022-03-20 19:12:31,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:12:31,770 INFO L478 AbstractCegarLoop]: Abstraction has 269 states and 271 transitions. [2022-03-20 19:12:31,770 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 2.0076923076923077) internal successors, (261), 129 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) [2022-03-20 19:12:31,770 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 271 transitions. [2022-03-20 19:12:31,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2022-03-20 19:12:31,771 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:12:31,771 INFO L499 BasicCegarLoop]: trace histogram [128, 127, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:12:31,787 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2022-03-20 19:12:31,986 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 [2022-03-20 19:12:31,987 INFO L403 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:12:31,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:12:31,987 INFO L85 PathProgramCache]: Analyzing trace with hash -679902847, now seen corresponding path program 253 times [2022-03-20 19:12:31,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:12:31,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1992589866] [2022-03-20 19:12:32,230 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:12:32,231 INFO L85 PathProgramCache]: Analyzing trace with hash 2002257936, now seen corresponding path program 1 times [2022-03-20 19:12:32,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:12:32,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492239160] [2022-03-20 19:12:32,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:12:32,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:12:32,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:12:32,233 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:12:32,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:12:32,234 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:12:32,234 INFO L85 PathProgramCache]: Analyzing trace with hash -679902847, now seen corresponding path program 254 times [2022-03-20 19:12:32,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:12:32,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928541339] [2022-03-20 19:12:32,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:12:32,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:12:32,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:12:36,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:12:36,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:12:36,055 INFO L134 CoverageAnalysis]: Checked inductivity of 16384 backedges. 128 proven. 16256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:12:36,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:12:36,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928541339] [2022-03-20 19:12:36,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928541339] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:12:36,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729002401] [2022-03-20 19:12:36,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:12:36,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:12:36,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:12:36,061 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) [2022-03-20 19:12:36,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-03-20 19:12:36,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:12:36,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:12:36,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 129 conjunts are in the unsatisfiable core [2022-03-20 19:12:36,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:12:36,340 INFO L134 CoverageAnalysis]: Checked inductivity of 16384 backedges. 128 proven. 16256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:12:36,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:12:45,598 INFO L134 CoverageAnalysis]: Checked inductivity of 16384 backedges. 128 proven. 16256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:12:45,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729002401] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:12:45,598 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:12:45,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [131, 130, 130] total 260 [2022-03-20 19:12:45,598 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:12:45,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1992589866] [2022-03-20 19:12:45,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1992589866] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:12:45,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:12:45,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [131] imperfect sequences [] total 131 [2022-03-20 19:12:45,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482380388] [2022-03-20 19:12:45,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:12:45,599 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-03-20 19:12:45,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:12:45,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-03-20 19:12:45,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33413, Invalid=33927, Unknown=0, NotChecked=0, Total=67340 [2022-03-20 19:12:45,604 INFO L87 Difference]: Start difference. First operand 269 states and 271 transitions. Second operand has 131 states, 131 states have (on average 2.0076335877862594) internal successors, (263), 130 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) [2022-03-20 19:12:49,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:12:49,532 INFO L93 Difference]: Finished difference Result 278 states and 282 transitions. [2022-03-20 19:12:49,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-03-20 19:12:49,532 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 2.0076335877862594) internal successors, (263), 130 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 [2022-03-20 19:12:49,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:12:49,533 INFO L225 Difference]: With dead ends: 278 [2022-03-20 19:12:49,533 INFO L226 Difference]: Without dead ends: 271 [2022-03-20 19:12:49,540 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 793 GetRequests, 407 SyntacticMatches, 0 SemanticMatches, 386 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8889 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=66566, Invalid=83590, Unknown=0, NotChecked=0, Total=150156 [2022-03-20 19:12:49,540 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 136 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:12:49,540 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 34 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:12:49,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-03-20 19:12:49,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 271. [2022-03-20 19:12:49,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 266 states have (on average 1.0112781954887218) internal successors, (269), 266 states have internal predecessors, (269), 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) [2022-03-20 19:12:49,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 273 transitions. [2022-03-20 19:12:49,548 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 273 transitions. Word has length 267 [2022-03-20 19:12:49,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:12:49,548 INFO L478 AbstractCegarLoop]: Abstraction has 271 states and 273 transitions. [2022-03-20 19:12:49,548 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 2.0076335877862594) internal successors, (263), 130 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) [2022-03-20 19:12:49,548 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 273 transitions. [2022-03-20 19:12:49,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2022-03-20 19:12:49,549 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:12:49,549 INFO L499 BasicCegarLoop]: trace histogram [129, 128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:12:49,566 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2022-03-20 19:12:49,750 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 [2022-03-20 19:12:49,750 INFO L403 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:12:49,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:12:49,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1360777438, now seen corresponding path program 255 times [2022-03-20 19:12:49,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:12:49,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1223011912] [2022-03-20 19:12:49,987 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:12:49,988 INFO L85 PathProgramCache]: Analyzing trace with hash 2061363280, now seen corresponding path program 1 times [2022-03-20 19:12:49,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:12:49,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040112887] [2022-03-20 19:12:49,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:12:49,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:12:49,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:12:49,990 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:12:49,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:12:49,991 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:12:49,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1360777438, now seen corresponding path program 256 times [2022-03-20 19:12:49,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:12:49,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550369046] [2022-03-20 19:12:49,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:12:49,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:12:50,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:12:54,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:12:54,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:12:54,874 INFO L134 CoverageAnalysis]: Checked inductivity of 16641 backedges. 129 proven. 16512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:12:54,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:12:54,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550369046] [2022-03-20 19:12:54,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550369046] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:12:54,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819058529] [2022-03-20 19:12:54,875 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:12:54,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:12:54,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:12:54,876 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) [2022-03-20 19:12:54,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-03-20 19:12:54,945 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:12:54,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:12:54,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 130 conjunts are in the unsatisfiable core [2022-03-20 19:12:54,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:12:55,338 INFO L134 CoverageAnalysis]: Checked inductivity of 16641 backedges. 129 proven. 16512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:12:55,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:13:04,812 INFO L134 CoverageAnalysis]: Checked inductivity of 16641 backedges. 129 proven. 16512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:13:04,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819058529] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:13:04,813 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:13:04,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [132, 131, 131] total 262 [2022-03-20 19:13:04,813 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:13:04,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1223011912] [2022-03-20 19:13:04,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1223011912] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:13:04,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:13:04,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [132] imperfect sequences [] total 132 [2022-03-20 19:13:04,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732278414] [2022-03-20 19:13:04,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:13:04,814 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2022-03-20 19:13:04,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:13:04,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2022-03-20 19:13:04,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33932, Invalid=34450, Unknown=0, NotChecked=0, Total=68382 [2022-03-20 19:13:04,818 INFO L87 Difference]: Start difference. First operand 271 states and 273 transitions. Second operand has 132 states, 132 states have (on average 2.007575757575758) internal successors, (265), 131 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) [2022-03-20 19:13:08,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:13:08,595 INFO L93 Difference]: Finished difference Result 280 states and 284 transitions. [2022-03-20 19:13:08,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-03-20 19:13:08,595 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 2.007575757575758) internal successors, (265), 131 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 [2022-03-20 19:13:08,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:13:08,596 INFO L225 Difference]: With dead ends: 280 [2022-03-20 19:13:08,596 INFO L226 Difference]: Without dead ends: 273 [2022-03-20 19:13:08,602 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 799 GetRequests, 410 SyntacticMatches, 0 SemanticMatches, 389 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9023 ImplicationChecksByTransitivity, 17.2s TimeCoverageRelationStatistics Valid=67602, Invalid=84888, Unknown=0, NotChecked=0, Total=152490 [2022-03-20 19:13:08,602 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 137 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 19:13:08,602 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 39 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 19:13:08,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-03-20 19:13:08,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 273. [2022-03-20 19:13:08,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 268 states have (on average 1.0111940298507462) internal successors, (271), 268 states have internal predecessors, (271), 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) [2022-03-20 19:13:08,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 275 transitions. [2022-03-20 19:13:08,608 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 275 transitions. Word has length 269 [2022-03-20 19:13:08,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:13:08,609 INFO L478 AbstractCegarLoop]: Abstraction has 273 states and 275 transitions. [2022-03-20 19:13:08,609 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 2.007575757575758) internal successors, (265), 131 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) [2022-03-20 19:13:08,609 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 275 transitions. [2022-03-20 19:13:08,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2022-03-20 19:13:08,609 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:13:08,609 INFO L499 BasicCegarLoop]: trace histogram [130, 129, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:13:08,627 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2022-03-20 19:13:08,826 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 [2022-03-20 19:13:08,826 INFO L403 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:13:08,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:13:08,827 INFO L85 PathProgramCache]: Analyzing trace with hash -345522949, now seen corresponding path program 257 times [2022-03-20 19:13:08,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:13:08,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [918986429] [2022-03-20 19:13:08,966 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:13:08,967 INFO L85 PathProgramCache]: Analyzing trace with hash 2120468624, now seen corresponding path program 1 times [2022-03-20 19:13:08,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:13:08,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652318606] [2022-03-20 19:13:08,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:13:08,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:13:08,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:13:08,970 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:13:08,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:13:08,973 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:13:08,973 INFO L85 PathProgramCache]: Analyzing trace with hash -345522949, now seen corresponding path program 258 times [2022-03-20 19:13:08,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:13:08,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551135015] [2022-03-20 19:13:08,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:13:08,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:13:08,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:13:11,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:13:11,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:13:11,753 INFO L134 CoverageAnalysis]: Checked inductivity of 16900 backedges. 130 proven. 16770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:13:11,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:13:11,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551135015] [2022-03-20 19:13:11,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551135015] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:13:11,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160881963] [2022-03-20 19:13:11,754 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 19:13:11,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:13:11,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:13:11,755 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) [2022-03-20 19:13:11,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-03-20 19:13:11,786 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 19:13:11,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:13:11,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 19:13:11,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:13:11,999 INFO L134 CoverageAnalysis]: Checked inductivity of 16900 backedges. 387 proven. 1 refuted. 0 times theorem prover too weak. 16512 trivial. 0 not checked. [2022-03-20 19:13:12,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:13:12,191 INFO L134 CoverageAnalysis]: Checked inductivity of 16900 backedges. 387 proven. 1 refuted. 0 times theorem prover too weak. 16512 trivial. 0 not checked. [2022-03-20 19:13:12,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160881963] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:13:12,191 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:13:12,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [133, 4, 4] total 137 [2022-03-20 19:13:12,191 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:13:12,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [918986429] [2022-03-20 19:13:12,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [918986429] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:13:12,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:13:12,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [133] imperfect sequences [] total 133 [2022-03-20 19:13:12,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364697347] [2022-03-20 19:13:12,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:13:12,192 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2022-03-20 19:13:12,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:13:12,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2022-03-20 19:13:12,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9182, Invalid=9450, Unknown=0, NotChecked=0, Total=18632 [2022-03-20 19:13:12,195 INFO L87 Difference]: Start difference. First operand 273 states and 275 transitions. Second operand has 133 states, 133 states have (on average 2.007518796992481) internal successors, (267), 132 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) [2022-03-20 19:13:16,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:13:16,625 INFO L93 Difference]: Finished difference Result 282 states and 286 transitions. [2022-03-20 19:13:16,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-03-20 19:13:16,625 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 2.007518796992481) internal successors, (267), 132 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 [2022-03-20 19:13:16,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:13:16,625 INFO L225 Difference]: With dead ends: 282 [2022-03-20 19:13:16,626 INFO L226 Difference]: Without dead ends: 275 [2022-03-20 19:13:16,629 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 805 GetRequests, 540 SyntacticMatches, 0 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8514 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=26992, Invalid=44030, Unknown=0, NotChecked=0, Total=71022 [2022-03-20 19:13:16,629 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 138 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 19:13:16,629 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 34 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 19:13:16,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-03-20 19:13:16,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2022-03-20 19:13:16,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 270 states have (on average 1.011111111111111) internal successors, (273), 270 states have internal predecessors, (273), 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) [2022-03-20 19:13:16,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 277 transitions. [2022-03-20 19:13:16,636 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 277 transitions. Word has length 271 [2022-03-20 19:13:16,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:13:16,636 INFO L478 AbstractCegarLoop]: Abstraction has 275 states and 277 transitions. [2022-03-20 19:13:16,636 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 133 states have (on average 2.007518796992481) internal successors, (267), 132 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) [2022-03-20 19:13:16,636 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 277 transitions. [2022-03-20 19:13:16,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2022-03-20 19:13:16,637 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:13:16,637 INFO L499 BasicCegarLoop]: trace histogram [131, 130, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:13:16,653 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2022-03-20 19:13:16,851 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 [2022-03-20 19:13:16,851 INFO L403 AbstractCegarLoop]: === Iteration 133 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:13:16,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:13:16,852 INFO L85 PathProgramCache]: Analyzing trace with hash 577312216, now seen corresponding path program 259 times [2022-03-20 19:13:16,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:13:16,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1715084561] [2022-03-20 19:13:17,028 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:13:17,029 INFO L85 PathProgramCache]: Analyzing trace with hash -2115393328, now seen corresponding path program 1 times [2022-03-20 19:13:17,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:13:17,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776089589] [2022-03-20 19:13:17,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:13:17,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:13:17,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:13:17,031 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:13:17,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:13:17,032 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:13:17,032 INFO L85 PathProgramCache]: Analyzing trace with hash 577312216, now seen corresponding path program 260 times [2022-03-20 19:13:17,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:13:17,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479097040] [2022-03-20 19:13:17,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:13:17,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:13:17,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:13:19,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:13:19,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:13:19,924 INFO L134 CoverageAnalysis]: Checked inductivity of 17161 backedges. 131 proven. 17030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:13:19,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:13:19,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479097040] [2022-03-20 19:13:19,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479097040] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:13:19,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875973971] [2022-03-20 19:13:19,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:13:19,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:13:19,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:13:19,925 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) [2022-03-20 19:13:19,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-03-20 19:13:19,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:13:19,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:13:19,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 132 conjunts are in the unsatisfiable core [2022-03-20 19:13:19,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:13:20,206 INFO L134 CoverageAnalysis]: Checked inductivity of 17161 backedges. 131 proven. 17030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:13:20,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:13:29,679 INFO L134 CoverageAnalysis]: Checked inductivity of 17161 backedges. 131 proven. 17030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:13:29,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875973971] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:13:29,679 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:13:29,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [134, 133, 133] total 266 [2022-03-20 19:13:29,680 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:13:29,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1715084561] [2022-03-20 19:13:29,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1715084561] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:13:29,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:13:29,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [134] imperfect sequences [] total 134 [2022-03-20 19:13:29,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948366811] [2022-03-20 19:13:29,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:13:29,680 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-03-20 19:13:29,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:13:29,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-03-20 19:13:29,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34982, Invalid=35508, Unknown=0, NotChecked=0, Total=70490 [2022-03-20 19:13:29,685 INFO L87 Difference]: Start difference. First operand 275 states and 277 transitions. Second operand has 134 states, 134 states have (on average 2.0074626865671643) internal successors, (269), 133 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) [2022-03-20 19:13:33,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:13:33,587 INFO L93 Difference]: Finished difference Result 284 states and 288 transitions. [2022-03-20 19:13:33,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-03-20 19:13:33,587 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 2.0074626865671643) internal successors, (269), 133 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 [2022-03-20 19:13:33,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:13:33,588 INFO L225 Difference]: With dead ends: 284 [2022-03-20 19:13:33,588 INFO L226 Difference]: Without dead ends: 277 [2022-03-20 19:13:33,593 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 811 GetRequests, 416 SyntacticMatches, 0 SemanticMatches, 395 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9294 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=69698, Invalid=87514, Unknown=0, NotChecked=0, Total=157212 [2022-03-20 19:13:33,593 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 139 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:13:33,594 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 49 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:13:33,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-03-20 19:13:33,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 277. [2022-03-20 19:13:33,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 272 states have (on average 1.0110294117647058) internal successors, (275), 272 states have internal predecessors, (275), 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) [2022-03-20 19:13:33,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 279 transitions. [2022-03-20 19:13:33,600 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 279 transitions. Word has length 273 [2022-03-20 19:13:33,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:13:33,601 INFO L478 AbstractCegarLoop]: Abstraction has 277 states and 279 transitions. [2022-03-20 19:13:33,601 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 2.0074626865671643) internal successors, (269), 133 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) [2022-03-20 19:13:33,601 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 279 transitions. [2022-03-20 19:13:33,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2022-03-20 19:13:33,601 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:13:33,601 INFO L499 BasicCegarLoop]: trace histogram [132, 131, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:13:33,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2022-03-20 19:13:33,815 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 [2022-03-20 19:13:33,815 INFO L403 AbstractCegarLoop]: === Iteration 134 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:13:33,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:13:33,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1636324491, now seen corresponding path program 261 times [2022-03-20 19:13:33,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:13:33,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1977503143] [2022-03-20 19:13:33,987 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:13:33,987 INFO L85 PathProgramCache]: Analyzing trace with hash -2056287984, now seen corresponding path program 1 times [2022-03-20 19:13:33,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:13:33,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040948618] [2022-03-20 19:13:33,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:13:33,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:13:33,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:13:33,989 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:13:33,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:13:34,007 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:13:34,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1636324491, now seen corresponding path program 262 times [2022-03-20 19:13:34,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:13:34,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840401362] [2022-03-20 19:13:34,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:13:34,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:13:34,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:13:36,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:13:36,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:13:36,963 INFO L134 CoverageAnalysis]: Checked inductivity of 17424 backedges. 132 proven. 17292 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:13:36,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:13:36,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840401362] [2022-03-20 19:13:36,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840401362] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:13:36,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137874770] [2022-03-20 19:13:36,963 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:13:36,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:13:36,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:13:36,964 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) [2022-03-20 19:13:36,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-03-20 19:13:37,051 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:13:37,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:13:37,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 133 conjunts are in the unsatisfiable core [2022-03-20 19:13:37,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:13:37,276 INFO L134 CoverageAnalysis]: Checked inductivity of 17424 backedges. 132 proven. 17292 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:13:37,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:13:46,056 INFO L134 CoverageAnalysis]: Checked inductivity of 17424 backedges. 132 proven. 17292 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:13:46,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137874770] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:13:46,056 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:13:46,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [135, 134, 134] total 268 [2022-03-20 19:13:46,056 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:13:46,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1977503143] [2022-03-20 19:13:46,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1977503143] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:13:46,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:13:46,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [135] imperfect sequences [] total 135 [2022-03-20 19:13:46,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169568926] [2022-03-20 19:13:46,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:13:46,057 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2022-03-20 19:13:46,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:13:46,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2022-03-20 19:13:46,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35513, Invalid=36043, Unknown=0, NotChecked=0, Total=71556 [2022-03-20 19:13:46,062 INFO L87 Difference]: Start difference. First operand 277 states and 279 transitions. Second operand has 135 states, 135 states have (on average 2.0074074074074075) internal successors, (271), 134 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) [2022-03-20 19:13:50,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:13:50,201 INFO L93 Difference]: Finished difference Result 286 states and 290 transitions. [2022-03-20 19:13:50,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-03-20 19:13:50,202 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 2.0074074074074075) internal successors, (271), 134 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 [2022-03-20 19:13:50,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:13:50,202 INFO L225 Difference]: With dead ends: 286 [2022-03-20 19:13:50,202 INFO L226 Difference]: Without dead ends: 279 [2022-03-20 19:13:50,208 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 817 GetRequests, 419 SyntacticMatches, 0 SemanticMatches, 398 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9431 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=70758, Invalid=88842, Unknown=0, NotChecked=0, Total=159600 [2022-03-20 19:13:50,208 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 140 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 19:13:50,209 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 29 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 19:13:50,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-03-20 19:13:50,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 279. [2022-03-20 19:13:50,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 274 states have (on average 1.010948905109489) internal successors, (277), 274 states have internal predecessors, (277), 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) [2022-03-20 19:13:50,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 281 transitions. [2022-03-20 19:13:50,216 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 281 transitions. Word has length 275 [2022-03-20 19:13:50,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:13:50,216 INFO L478 AbstractCegarLoop]: Abstraction has 279 states and 281 transitions. [2022-03-20 19:13:50,216 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 2.0074074074074075) internal successors, (271), 134 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) [2022-03-20 19:13:50,216 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 281 transitions. [2022-03-20 19:13:50,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2022-03-20 19:13:50,216 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:13:50,217 INFO L499 BasicCegarLoop]: trace histogram [133, 132, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:13:50,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2022-03-20 19:13:50,433 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 [2022-03-20 19:13:50,433 INFO L403 AbstractCegarLoop]: === Iteration 135 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:13:50,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:13:50,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1362578898, now seen corresponding path program 263 times [2022-03-20 19:13:50,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:13:50,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1788691761] [2022-03-20 19:13:50,563 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:13:50,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1997182640, now seen corresponding path program 1 times [2022-03-20 19:13:50,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:13:50,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992619472] [2022-03-20 19:13:50,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:13:50,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:13:50,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:13:50,565 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:13:50,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:13:50,566 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:13:50,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1362578898, now seen corresponding path program 264 times [2022-03-20 19:13:50,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:13:50,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521216184] [2022-03-20 19:13:50,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:13:50,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:13:50,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:13:53,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:13:53,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:13:53,525 INFO L134 CoverageAnalysis]: Checked inductivity of 17689 backedges. 133 proven. 17556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:13:53,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:13:53,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521216184] [2022-03-20 19:13:53,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521216184] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:13:53,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477486592] [2022-03-20 19:13:53,525 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 19:13:53,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:13:53,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:13:53,526 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) [2022-03-20 19:13:53,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-03-20 19:13:53,560 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 19:13:53,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:13:53,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 19:13:53,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:13:53,787 INFO L134 CoverageAnalysis]: Checked inductivity of 17689 backedges. 396 proven. 1 refuted. 0 times theorem prover too weak. 17292 trivial. 0 not checked. [2022-03-20 19:13:53,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:13:53,989 INFO L134 CoverageAnalysis]: Checked inductivity of 17689 backedges. 396 proven. 1 refuted. 0 times theorem prover too weak. 17292 trivial. 0 not checked. [2022-03-20 19:13:53,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477486592] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:13:53,989 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:13:53,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [136, 4, 4] total 140 [2022-03-20 19:13:53,990 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:13:53,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1788691761] [2022-03-20 19:13:53,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1788691761] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:13:53,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:13:53,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [136] imperfect sequences [] total 136 [2022-03-20 19:13:53,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793818012] [2022-03-20 19:13:53,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:13:53,990 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2022-03-20 19:13:53,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:13:53,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2022-03-20 19:13:53,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9593, Invalid=9867, Unknown=0, NotChecked=0, Total=19460 [2022-03-20 19:13:53,993 INFO L87 Difference]: Start difference. First operand 279 states and 281 transitions. Second operand has 136 states, 136 states have (on average 2.0073529411764706) internal successors, (273), 135 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) [2022-03-20 19:13:58,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:13:58,147 INFO L93 Difference]: Finished difference Result 288 states and 292 transitions. [2022-03-20 19:13:58,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2022-03-20 19:13:58,147 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 2.0073529411764706) internal successors, (273), 135 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 [2022-03-20 19:13:58,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:13:58,147 INFO L225 Difference]: With dead ends: 288 [2022-03-20 19:13:58,147 INFO L226 Difference]: Without dead ends: 281 [2022-03-20 19:13:58,150 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 823 GetRequests, 552 SyntacticMatches, 0 SemanticMatches, 271 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8910 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=28213, Invalid=46043, Unknown=0, NotChecked=0, Total=74256 [2022-03-20 19:13:58,151 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 141 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 19:13:58,151 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 29 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 19:13:58,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-03-20 19:13:58,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 281. [2022-03-20 19:13:58,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 276 states have (on average 1.0108695652173914) internal successors, (279), 276 states have internal predecessors, (279), 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) [2022-03-20 19:13:58,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 283 transitions. [2022-03-20 19:13:58,158 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 283 transitions. Word has length 277 [2022-03-20 19:13:58,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:13:58,158 INFO L478 AbstractCegarLoop]: Abstraction has 281 states and 283 transitions. [2022-03-20 19:13:58,158 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 136 states have (on average 2.0073529411764706) internal successors, (273), 135 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) [2022-03-20 19:13:58,158 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 283 transitions. [2022-03-20 19:13:58,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2022-03-20 19:13:58,159 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:13:58,159 INFO L499 BasicCegarLoop]: trace histogram [134, 133, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:13:58,175 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2022-03-20 19:13:58,375 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 [2022-03-20 19:13:58,375 INFO L403 AbstractCegarLoop]: === Iteration 136 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:13:58,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:13:58,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1385680111, now seen corresponding path program 265 times [2022-03-20 19:13:58,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:13:58,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1493026519] [2022-03-20 19:13:58,574 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:13:58,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1938077296, now seen corresponding path program 1 times [2022-03-20 19:13:58,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:13:58,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079814660] [2022-03-20 19:13:58,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:13:58,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:13:58,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:13:58,576 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:13:58,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:13:58,577 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:13:58,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1385680111, now seen corresponding path program 266 times [2022-03-20 19:13:58,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:13:58,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315571555] [2022-03-20 19:13:58,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:13:58,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:13:58,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:14:03,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:14:03,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:14:03,470 INFO L134 CoverageAnalysis]: Checked inductivity of 17956 backedges. 134 proven. 17822 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:14:03,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:14:03,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315571555] [2022-03-20 19:14:03,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315571555] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:14:03,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807648353] [2022-03-20 19:14:03,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:14:03,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:14:03,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:14:03,472 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) [2022-03-20 19:14:03,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-03-20 19:14:03,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:14:03,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:14:03,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 591 conjuncts, 135 conjunts are in the unsatisfiable core [2022-03-20 19:14:03,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:14:03,769 INFO L134 CoverageAnalysis]: Checked inductivity of 17956 backedges. 134 proven. 17822 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:14:03,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:14:13,030 INFO L134 CoverageAnalysis]: Checked inductivity of 17956 backedges. 134 proven. 17822 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:14:13,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807648353] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:14:13,030 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:14:13,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [137, 136, 136] total 272 [2022-03-20 19:14:13,030 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:14:13,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1493026519] [2022-03-20 19:14:13,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1493026519] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:14:13,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:14:13,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [137] imperfect sequences [] total 137 [2022-03-20 19:14:13,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168403331] [2022-03-20 19:14:13,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:14:13,031 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2022-03-20 19:14:13,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:14:13,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2022-03-20 19:14:13,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36587, Invalid=37125, Unknown=0, NotChecked=0, Total=73712 [2022-03-20 19:14:13,036 INFO L87 Difference]: Start difference. First operand 281 states and 283 transitions. Second operand has 137 states, 137 states have (on average 2.0072992700729926) internal successors, (275), 136 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) [2022-03-20 19:14:17,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:14:17,335 INFO L93 Difference]: Finished difference Result 290 states and 294 transitions. [2022-03-20 19:14:17,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-03-20 19:14:17,336 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 2.0072992700729926) internal successors, (275), 136 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 [2022-03-20 19:14:17,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:14:17,336 INFO L225 Difference]: With dead ends: 290 [2022-03-20 19:14:17,336 INFO L226 Difference]: Without dead ends: 283 [2022-03-20 19:14:17,341 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 829 GetRequests, 425 SyntacticMatches, 0 SemanticMatches, 404 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9708 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=72902, Invalid=91528, Unknown=0, NotChecked=0, Total=164430 [2022-03-20 19:14:17,342 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 142 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 19:14:17,342 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 44 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 19:14:17,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-03-20 19:14:17,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 283. [2022-03-20 19:14:17,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 278 states have (on average 1.0107913669064748) internal successors, (281), 278 states have internal predecessors, (281), 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) [2022-03-20 19:14:17,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 285 transitions. [2022-03-20 19:14:17,349 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 285 transitions. Word has length 279 [2022-03-20 19:14:17,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:14:17,349 INFO L478 AbstractCegarLoop]: Abstraction has 283 states and 285 transitions. [2022-03-20 19:14:17,349 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 2.0072992700729926) internal successors, (275), 136 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) [2022-03-20 19:14:17,350 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 285 transitions. [2022-03-20 19:14:17,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2022-03-20 19:14:17,350 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:14:17,350 INFO L499 BasicCegarLoop]: trace histogram [135, 134, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:14:17,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2022-03-20 19:14:17,567 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 [2022-03-20 19:14:17,567 INFO L403 AbstractCegarLoop]: === Iteration 137 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:14:17,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:14:17,568 INFO L85 PathProgramCache]: Analyzing trace with hash 2111109324, now seen corresponding path program 267 times [2022-03-20 19:14:17,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:14:17,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [123447694] [2022-03-20 19:14:17,713 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:14:17,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1878971952, now seen corresponding path program 1 times [2022-03-20 19:14:17,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:14:17,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883861901] [2022-03-20 19:14:17,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:14:17,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:14:17,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:14:17,715 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:14:17,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:14:17,717 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:14:17,717 INFO L85 PathProgramCache]: Analyzing trace with hash 2111109324, now seen corresponding path program 268 times [2022-03-20 19:14:17,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:14:17,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374819744] [2022-03-20 19:14:17,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:14:17,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:14:17,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:14:20,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:14:20,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:14:20,775 INFO L134 CoverageAnalysis]: Checked inductivity of 18225 backedges. 135 proven. 18090 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:14:20,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:14:20,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374819744] [2022-03-20 19:14:20,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374819744] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:14:20,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453533590] [2022-03-20 19:14:20,775 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:14:20,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:14:20,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:14:20,776 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) [2022-03-20 19:14:20,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-03-20 19:14:20,850 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:14:20,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:14:20,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 136 conjunts are in the unsatisfiable core [2022-03-20 19:14:20,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:14:21,075 INFO L134 CoverageAnalysis]: Checked inductivity of 18225 backedges. 135 proven. 18090 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:14:21,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:14:30,666 INFO L134 CoverageAnalysis]: Checked inductivity of 18225 backedges. 135 proven. 18090 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:14:30,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453533590] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:14:30,666 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:14:30,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [138, 137, 137] total 274 [2022-03-20 19:14:30,666 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:14:30,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [123447694] [2022-03-20 19:14:30,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [123447694] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:14:30,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:14:30,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [138] imperfect sequences [] total 138 [2022-03-20 19:14:30,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655997692] [2022-03-20 19:14:30,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:14:30,667 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2022-03-20 19:14:30,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:14:30,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2022-03-20 19:14:30,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37130, Invalid=37672, Unknown=0, NotChecked=0, Total=74802 [2022-03-20 19:14:30,671 INFO L87 Difference]: Start difference. First operand 283 states and 285 transitions. Second operand has 138 states, 138 states have (on average 2.0072463768115942) internal successors, (277), 137 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) [2022-03-20 19:14:34,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:14:34,942 INFO L93 Difference]: Finished difference Result 292 states and 296 transitions. [2022-03-20 19:14:34,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-03-20 19:14:34,942 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 2.0072463768115942) internal successors, (277), 137 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 [2022-03-20 19:14:34,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:14:34,943 INFO L225 Difference]: With dead ends: 292 [2022-03-20 19:14:34,943 INFO L226 Difference]: Without dead ends: 285 [2022-03-20 19:14:34,950 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 835 GetRequests, 428 SyntacticMatches, 0 SemanticMatches, 407 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9848 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=73986, Invalid=92886, Unknown=0, NotChecked=0, Total=166872 [2022-03-20 19:14:34,950 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 143 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 19:14:34,950 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 39 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 19:14:34,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-03-20 19:14:34,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 285. [2022-03-20 19:14:34,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 280 states have (on average 1.0107142857142857) internal successors, (283), 280 states have internal predecessors, (283), 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) [2022-03-20 19:14:34,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 287 transitions. [2022-03-20 19:14:34,957 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 287 transitions. Word has length 281 [2022-03-20 19:14:34,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:14:34,957 INFO L478 AbstractCegarLoop]: Abstraction has 285 states and 287 transitions. [2022-03-20 19:14:34,958 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 138 states have (on average 2.0072463768115942) internal successors, (277), 137 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) [2022-03-20 19:14:34,958 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 287 transitions. [2022-03-20 19:14:34,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2022-03-20 19:14:34,958 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:14:34,958 INFO L499 BasicCegarLoop]: trace histogram [136, 135, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:14:34,975 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2022-03-20 19:14:35,159 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 [2022-03-20 19:14:35,159 INFO L403 AbstractCegarLoop]: === Iteration 138 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:14:35,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:14:35,160 INFO L85 PathProgramCache]: Analyzing trace with hash -831086231, now seen corresponding path program 269 times [2022-03-20 19:14:35,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:14:35,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2126772659] [2022-03-20 19:14:35,448 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:14:35,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1819866608, now seen corresponding path program 1 times [2022-03-20 19:14:35,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:14:35,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316980776] [2022-03-20 19:14:35,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:14:35,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:14:35,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:14:35,450 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:14:35,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:14:35,452 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:14:35,452 INFO L85 PathProgramCache]: Analyzing trace with hash -831086231, now seen corresponding path program 270 times [2022-03-20 19:14:35,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:14:35,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484710854] [2022-03-20 19:14:35,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:14:35,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:14:35,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:14:38,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:14:38,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:14:38,708 INFO L134 CoverageAnalysis]: Checked inductivity of 18496 backedges. 136 proven. 18360 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:14:38,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:14:38,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484710854] [2022-03-20 19:14:38,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484710854] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:14:38,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373443353] [2022-03-20 19:14:38,708 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 19:14:38,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:14:38,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:14:38,709 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) [2022-03-20 19:14:38,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-03-20 19:14:38,743 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 19:14:38,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:14:38,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 19:14:38,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:14:39,080 INFO L134 CoverageAnalysis]: Checked inductivity of 18496 backedges. 405 proven. 1 refuted. 0 times theorem prover too weak. 18090 trivial. 0 not checked. [2022-03-20 19:14:39,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:14:39,378 INFO L134 CoverageAnalysis]: Checked inductivity of 18496 backedges. 405 proven. 1 refuted. 0 times theorem prover too weak. 18090 trivial. 0 not checked. [2022-03-20 19:14:39,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373443353] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:14:39,378 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:14:39,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [139, 4, 4] total 143 [2022-03-20 19:14:39,378 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:14:39,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2126772659] [2022-03-20 19:14:39,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2126772659] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:14:39,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:14:39,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [139] imperfect sequences [] total 139 [2022-03-20 19:14:39,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119604680] [2022-03-20 19:14:39,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:14:39,379 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2022-03-20 19:14:39,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:14:39,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2022-03-20 19:14:39,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10013, Invalid=10293, Unknown=0, NotChecked=0, Total=20306 [2022-03-20 19:14:39,381 INFO L87 Difference]: Start difference. First operand 285 states and 287 transitions. Second operand has 139 states, 139 states have (on average 2.0071942446043165) internal successors, (279), 138 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) [2022-03-20 19:14:44,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:14:44,055 INFO L93 Difference]: Finished difference Result 294 states and 298 transitions. [2022-03-20 19:14:44,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-03-20 19:14:44,056 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 2.0071942446043165) internal successors, (279), 138 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 [2022-03-20 19:14:44,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:14:44,056 INFO L225 Difference]: With dead ends: 294 [2022-03-20 19:14:44,056 INFO L226 Difference]: Without dead ends: 287 [2022-03-20 19:14:44,060 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 841 GetRequests, 564 SyntacticMatches, 0 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9315 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=29461, Invalid=48101, Unknown=0, NotChecked=0, Total=77562 [2022-03-20 19:14:44,060 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 144 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 19:14:44,061 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 39 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 19:14:44,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-03-20 19:14:44,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2022-03-20 19:14:44,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 282 states have (on average 1.0106382978723405) internal successors, (285), 282 states have internal predecessors, (285), 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) [2022-03-20 19:14:44,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 289 transitions. [2022-03-20 19:14:44,086 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 289 transitions. Word has length 283 [2022-03-20 19:14:44,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:14:44,087 INFO L478 AbstractCegarLoop]: Abstraction has 287 states and 289 transitions. [2022-03-20 19:14:44,087 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 139 states have (on average 2.0071942446043165) internal successors, (279), 138 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) [2022-03-20 19:14:44,087 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 289 transitions. [2022-03-20 19:14:44,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2022-03-20 19:14:44,087 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:14:44,087 INFO L499 BasicCegarLoop]: trace histogram [137, 136, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:14:44,104 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2022-03-20 19:14:44,303 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 [2022-03-20 19:14:44,303 INFO L403 AbstractCegarLoop]: === Iteration 139 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:14:44,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:14:44,303 INFO L85 PathProgramCache]: Analyzing trace with hash 2102433478, now seen corresponding path program 271 times [2022-03-20 19:14:44,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:14:44,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [369791041] [2022-03-20 19:14:44,525 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:14:44,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1760761264, now seen corresponding path program 1 times [2022-03-20 19:14:44,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:14:44,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647879049] [2022-03-20 19:14:44,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:14:44,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:14:44,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:14:44,528 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:14:44,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:14:44,532 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:14:44,532 INFO L85 PathProgramCache]: Analyzing trace with hash 2102433478, now seen corresponding path program 272 times [2022-03-20 19:14:44,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:14:44,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078033702] [2022-03-20 19:14:44,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:14:44,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:14:44,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:14:50,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:14:50,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:14:50,048 INFO L134 CoverageAnalysis]: Checked inductivity of 18769 backedges. 137 proven. 18632 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:14:50,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:14:50,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078033702] [2022-03-20 19:14:50,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078033702] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:14:50,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961202450] [2022-03-20 19:14:50,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:14:50,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:14:50,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:14:50,049 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) [2022-03-20 19:14:50,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-03-20 19:14:50,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:14:50,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:14:50,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 138 conjunts are in the unsatisfiable core [2022-03-20 19:14:50,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:14:50,568 INFO L134 CoverageAnalysis]: Checked inductivity of 18769 backedges. 137 proven. 18632 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:14:50,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:15:04,656 INFO L134 CoverageAnalysis]: Checked inductivity of 18769 backedges. 137 proven. 18632 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:15:04,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961202450] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:15:04,656 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:15:04,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [140, 139, 139] total 278 [2022-03-20 19:15:04,656 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:15:04,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [369791041] [2022-03-20 19:15:04,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [369791041] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:15:04,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:15:04,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [140] imperfect sequences [] total 140 [2022-03-20 19:15:04,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174138209] [2022-03-20 19:15:04,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:15:04,657 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-03-20 19:15:04,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:15:04,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-03-20 19:15:04,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38228, Invalid=38778, Unknown=0, NotChecked=0, Total=77006 [2022-03-20 19:15:04,662 INFO L87 Difference]: Start difference. First operand 287 states and 289 transitions. Second operand has 140 states, 140 states have (on average 2.007142857142857) internal successors, (281), 139 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) [2022-03-20 19:15:09,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:15:09,550 INFO L93 Difference]: Finished difference Result 296 states and 300 transitions. [2022-03-20 19:15:09,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-03-20 19:15:09,550 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 2.007142857142857) internal successors, (281), 139 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 [2022-03-20 19:15:09,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:15:09,551 INFO L225 Difference]: With dead ends: 296 [2022-03-20 19:15:09,551 INFO L226 Difference]: Without dead ends: 289 [2022-03-20 19:15:09,557 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 847 GetRequests, 434 SyntacticMatches, 0 SemanticMatches, 413 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10131 ImplicationChecksByTransitivity, 23.3s TimeCoverageRelationStatistics Valid=76178, Invalid=95632, Unknown=0, NotChecked=0, Total=171810 [2022-03-20 19:15:09,557 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 145 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 19:15:09,557 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 54 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 19:15:09,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-03-20 19:15:09,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2022-03-20 19:15:09,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 284 states have (on average 1.0105633802816902) internal successors, (287), 284 states have internal predecessors, (287), 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) [2022-03-20 19:15:09,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 291 transitions. [2022-03-20 19:15:09,564 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 291 transitions. Word has length 285 [2022-03-20 19:15:09,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:15:09,564 INFO L478 AbstractCegarLoop]: Abstraction has 289 states and 291 transitions. [2022-03-20 19:15:09,565 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 2.007142857142857) internal successors, (281), 139 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) [2022-03-20 19:15:09,565 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 291 transitions. [2022-03-20 19:15:09,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2022-03-20 19:15:09,565 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:15:09,565 INFO L499 BasicCegarLoop]: trace histogram [138, 137, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:15:09,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Forceful destruction successful, exit code 0 [2022-03-20 19:15:09,782 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 [2022-03-20 19:15:09,782 INFO L403 AbstractCegarLoop]: === Iteration 140 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:15:09,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:15:09,782 INFO L85 PathProgramCache]: Analyzing trace with hash -578639645, now seen corresponding path program 273 times [2022-03-20 19:15:09,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:15:09,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1758543414] [2022-03-20 19:15:09,942 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-20 19:15:09,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1701655920, now seen corresponding path program 1 times [2022-03-20 19:15:09,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:15:09,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94489096] [2022-03-20 19:15:09,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:15:09,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:15:09,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:15:09,944 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:15:09,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:15:09,945 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:15:09,946 INFO L85 PathProgramCache]: Analyzing trace with hash -578639645, now seen corresponding path program 274 times [2022-03-20 19:15:09,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:15:09,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349811413] [2022-03-20 19:15:09,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:15:09,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:15:09,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:15:13,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:15:13,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:15:13,628 INFO L134 CoverageAnalysis]: Checked inductivity of 19044 backedges. 138 proven. 18906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:15:13,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:15:13,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349811413] [2022-03-20 19:15:13,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349811413] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:15:13,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192273782] [2022-03-20 19:15:13,628 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:15:13,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:15:13,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:15:13,630 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) [2022-03-20 19:15:13,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-03-20 19:15:13,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:15:13,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:15:13,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 607 conjuncts, 139 conjunts are in the unsatisfiable core [2022-03-20 19:15:13,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:15:13,936 INFO L134 CoverageAnalysis]: Checked inductivity of 19044 backedges. 138 proven. 18906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:15:13,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:15:25,545 INFO L134 CoverageAnalysis]: Checked inductivity of 19044 backedges. 138 proven. 18906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:15:25,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192273782] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:15:25,546 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:15:25,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [141, 140, 140] total 280 [2022-03-20 19:15:25,546 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:15:25,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1758543414] [2022-03-20 19:15:25,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1758543414] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:15:25,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:15:25,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [141] imperfect sequences [] total 141 [2022-03-20 19:15:25,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110405121] [2022-03-20 19:15:25,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:15:25,546 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2022-03-20 19:15:25,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:15:25,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2022-03-20 19:15:25,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38783, Invalid=39337, Unknown=0, NotChecked=0, Total=78120 [2022-03-20 19:15:25,551 INFO L87 Difference]: Start difference. First operand 289 states and 291 transitions. Second operand has 141 states, 141 states have (on average 2.00709219858156) internal successors, (283), 140 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)