/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/nested5-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-18 00:59:46,187 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 00:59:46,189 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 00:59:46,256 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 00:59:46,305 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 00:59:46,306 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 00:59:46,308 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 00:59:46,309 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-18 00:59:46,319 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 00:59:46,319 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 00:59:46,321 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 00:59:46,321 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 00:59:46,321 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 00:59:46,321 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 00:59:46,321 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 00:59:46,321 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 00:59:46,321 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 00:59:46,322 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 00:59:46,322 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 00:59:46,322 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 00:59:46,323 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 00:59:46,323 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 00:59:46,323 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 00:59:46,323 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 00:59:46,323 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 00:59:46,323 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-18 00:59:46,323 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-18 00:59:46,323 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-18 00:59:46,323 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 00:59:46,324 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-18 00:59:46,324 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 00:59:46,530 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 00:59:46,552 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 00:59:46,554 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 00:59:46,554 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 00:59:46,555 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 00:59:46,556 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/nested5-2.c [2022-03-18 00:59:46,607 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be73810e3/c42f60a061ff4c67910f510cd66a5a29/FLAGe06825f1e [2022-03-18 00:59:46,980 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 00:59:46,980 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested5-2.c [2022-03-18 00:59:46,985 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be73810e3/c42f60a061ff4c67910f510cd66a5a29/FLAGe06825f1e [2022-03-18 00:59:47,397 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be73810e3/c42f60a061ff4c67910f510cd66a5a29 [2022-03-18 00:59:47,399 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 00:59:47,400 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 00:59:47,401 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 00:59:47,401 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 00:59:47,410 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 00:59:47,411 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 12:59:47" (1/1) ... [2022-03-18 00:59:47,412 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d7079a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:59:47, skipping insertion in model container [2022-03-18 00:59:47,412 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 12:59:47" (1/1) ... [2022-03-18 00:59:47,417 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 00:59:47,429 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 00:59:47,560 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/nested5-2.c[321,334] [2022-03-18 00:59:47,576 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 00:59:47,582 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 00:59:47,593 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/nested5-2.c[321,334] [2022-03-18 00:59:47,602 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 00:59:47,621 INFO L208 MainTranslator]: Completed translation [2022-03-18 00:59:47,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:59:47 WrapperNode [2022-03-18 00:59:47,622 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 00:59:47,623 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 00:59:47,623 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 00:59:47,624 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 00:59:47,633 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:59:47" (1/1) ... [2022-03-18 00:59:47,633 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:59:47" (1/1) ... [2022-03-18 00:59:47,640 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:59:47" (1/1) ... [2022-03-18 00:59:47,640 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:59:47" (1/1) ... [2022-03-18 00:59:47,652 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:59:47" (1/1) ... [2022-03-18 00:59:47,656 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:59:47" (1/1) ... [2022-03-18 00:59:47,657 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:59:47" (1/1) ... [2022-03-18 00:59:47,658 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 00:59:47,659 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 00:59:47,659 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 00:59:47,659 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 00:59:47,660 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:59:47" (1/1) ... [2022-03-18 00:59:47,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 00:59:47,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:59:47,696 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-18 00:59:47,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-18 00:59:47,743 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 00:59:47,743 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 00:59:47,743 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 00:59:47,743 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 00:59:47,743 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 00:59:47,744 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 00:59:47,744 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 00:59:47,744 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 00:59:47,744 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 00:59:47,744 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 00:59:47,745 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 00:59:47,745 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 00:59:47,745 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 00:59:47,745 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 00:59:47,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 00:59:47,751 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 00:59:47,752 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 00:59:47,810 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 00:59:47,812 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 00:59:47,898 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 00:59:47,902 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 00:59:47,903 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-03-18 00:59:47,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 12:59:47 BoogieIcfgContainer [2022-03-18 00:59:47,904 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 00:59:47,905 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 00:59:47,905 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 00:59:47,908 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 00:59:47,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 12:59:47" (1/3) ... [2022-03-18 00:59:47,909 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5928927c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 12:59:47, skipping insertion in model container [2022-03-18 00:59:47,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:59:47" (2/3) ... [2022-03-18 00:59:47,909 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5928927c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 12:59:47, skipping insertion in model container [2022-03-18 00:59:47,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 12:59:47" (3/3) ... [2022-03-18 00:59:47,910 INFO L111 eAbstractionObserver]: Analyzing ICFG nested5-2.c [2022-03-18 00:59:47,914 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-18 00:59:47,914 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 00:59:47,947 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 00:59:47,952 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-18 00:59:47,953 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 00:59:47,976 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 00:59:47,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-18 00:59:47,982 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:59:47,982 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:59:47,983 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:59:47,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:59:47,987 INFO L85 PathProgramCache]: Analyzing trace with hash -531959740, now seen corresponding path program 1 times [2022-03-18 00:59:47,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:47,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2048118188] [2022-03-18 00:59:48,001 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:59:48,001 INFO L85 PathProgramCache]: Analyzing trace with hash -531959740, now seen corresponding path program 2 times [2022-03-18 00:59:48,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:48,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40738929] [2022-03-18 00:59:48,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:48,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:48,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:48,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:59:48,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:48,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:48,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:59:48,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40738929] [2022-03-18 00:59:48,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40738929] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:48,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:48,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 00:59:48,190 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:59:48,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2048118188] [2022-03-18 00:59:48,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2048118188] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:48,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:48,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 00:59:48,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259006862] [2022-03-18 00:59:48,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:59:48,194 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 00:59:48,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:48,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 00:59:48,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 00:59:48,215 INFO L87 Difference]: Start difference. First operand has 28 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 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 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:59:48,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:59:48,247 INFO L93 Difference]: Finished difference Result 50 states and 71 transitions. [2022-03-18 00:59:48,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 00:59:48,249 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-03-18 00:59:48,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:59:48,253 INFO L225 Difference]: With dead ends: 50 [2022-03-18 00:59:48,254 INFO L226 Difference]: Without dead ends: 23 [2022-03-18 00:59:48,256 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 00:59:48,259 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 23 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:59:48,260 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 34 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:59:48,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-18 00:59:48,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-03-18 00:59:48,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:48,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-03-18 00:59:48,293 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 15 [2022-03-18 00:59:48,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:59:48,293 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-03-18 00:59:48,293 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:59:48,293 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-03-18 00:59:48,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-18 00:59:48,294 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:59:48,294 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:59:48,294 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 00:59:48,295 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:59:48,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:59:48,296 INFO L85 PathProgramCache]: Analyzing trace with hash -537500866, now seen corresponding path program 1 times [2022-03-18 00:59:48,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:48,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1094087756] [2022-03-18 00:59:48,297 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:59:48,297 INFO L85 PathProgramCache]: Analyzing trace with hash -537500866, now seen corresponding path program 2 times [2022-03-18 00:59:48,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:48,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647883979] [2022-03-18 00:59:48,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:48,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:48,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:48,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:59:48,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:48,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:48,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:59:48,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647883979] [2022-03-18 00:59:48,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647883979] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:48,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:48,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:59:48,421 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:59:48,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1094087756] [2022-03-18 00:59:48,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1094087756] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:48,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:48,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:59:48,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484255849] [2022-03-18 00:59:48,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:59:48,422 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 00:59:48,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:48,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 00:59:48,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 00:59:48,424 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:59:48,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:59:48,493 INFO L93 Difference]: Finished difference Result 49 states and 61 transitions. [2022-03-18 00:59:48,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 00:59:48,494 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-03-18 00:59:48,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:59:48,495 INFO L225 Difference]: With dead ends: 49 [2022-03-18 00:59:48,495 INFO L226 Difference]: Without dead ends: 32 [2022-03-18 00:59:48,495 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 00:59:48,497 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 41 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:59:48,497 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 31 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:59:48,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-18 00:59:48,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2022-03-18 00:59:48,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:48,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-03-18 00:59:48,505 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 15 [2022-03-18 00:59:48,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:59:48,505 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-03-18 00:59:48,505 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:59:48,506 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-03-18 00:59:48,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-18 00:59:48,506 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:59:48,506 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:59:48,507 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 00:59:48,507 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:59:48,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:59:48,508 INFO L85 PathProgramCache]: Analyzing trace with hash -509289700, now seen corresponding path program 1 times [2022-03-18 00:59:48,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:48,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1810171515] [2022-03-18 00:59:48,603 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:59:48,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1836574324, now seen corresponding path program 1 times [2022-03-18 00:59:48,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:48,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526950204] [2022-03-18 00:59:48,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:48,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:48,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:59:48,644 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:59:48,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:59:48,685 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:59:48,685 INFO L85 PathProgramCache]: Analyzing trace with hash -509289700, now seen corresponding path program 2 times [2022-03-18 00:59:48,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:48,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015957439] [2022-03-18 00:59:48,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:48,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:48,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:48,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:59:48,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:48,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:48,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:59:48,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015957439] [2022-03-18 00:59:48,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015957439] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:59:48,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234398543] [2022-03-18 00:59:48,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:59:48,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:59:48,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:59:48,784 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:59:48,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 00:59:48,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:59:48,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:59:48,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-18 00:59:48,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:59:48,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:48,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:59:48,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:48,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234398543] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:59:48,946 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:59:48,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-18 00:59:48,947 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:59:48,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1810171515] [2022-03-18 00:59:48,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1810171515] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:48,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:48,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 00:59:48,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976689612] [2022-03-18 00:59:48,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:59:48,949 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 00:59:48,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:48,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 00:59:48,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-03-18 00:59:48,951 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 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) [2022-03-18 00:59:49,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:59:49,044 INFO L93 Difference]: Finished difference Result 52 states and 64 transitions. [2022-03-18 00:59:49,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 00:59:49,044 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 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 [2022-03-18 00:59:49,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:59:49,046 INFO L225 Difference]: With dead ends: 52 [2022-03-18 00:59:49,046 INFO L226 Difference]: Without dead ends: 34 [2022-03-18 00:59:49,047 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-03-18 00:59:49,055 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 43 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:59:49,059 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 36 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:59:49,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-18 00:59:49,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 26. [2022-03-18 00:59:49,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:49,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-03-18 00:59:49,065 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 17 [2022-03-18 00:59:49,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:59:49,066 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-03-18 00:59:49,066 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 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) [2022-03-18 00:59:49,066 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-03-18 00:59:49,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-18 00:59:49,066 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:59:49,067 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:59:49,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 00:59:49,267 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:59:49,267 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:59:49,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:59:49,268 INFO L85 PathProgramCache]: Analyzing trace with hash 831837050, now seen corresponding path program 3 times [2022-03-18 00:59:49,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:49,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1026122955] [2022-03-18 00:59:49,314 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:59:49,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1895679668, now seen corresponding path program 1 times [2022-03-18 00:59:49,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:49,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76170904] [2022-03-18 00:59:49,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:49,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:49,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:59:49,331 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:59:49,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:59:49,350 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:59:49,350 INFO L85 PathProgramCache]: Analyzing trace with hash 831837050, now seen corresponding path program 4 times [2022-03-18 00:59:49,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:49,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49750359] [2022-03-18 00:59:49,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:49,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:49,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:49,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:59:49,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:49,458 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:49,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:59:49,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49750359] [2022-03-18 00:59:49,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49750359] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:59:49,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128862310] [2022-03-18 00:59:49,460 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:59:49,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:59:49,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:59:49,464 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:59:49,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 00:59:49,516 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:59:49,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:59:49,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 00:59:49,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:59:49,618 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:49,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:59:49,685 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:49,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128862310] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:59:49,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:59:49,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-03-18 00:59:49,691 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:59:49,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1026122955] [2022-03-18 00:59:49,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1026122955] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:49,691 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:49,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 00:59:49,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518527232] [2022-03-18 00:59:49,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:59:49,695 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 00:59:49,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:49,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 00:59:49,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-03-18 00:59:49,697 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:59:49,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:59:49,807 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2022-03-18 00:59:49,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 00:59:49,808 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-03-18 00:59:49,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:59:49,808 INFO L225 Difference]: With dead ends: 56 [2022-03-18 00:59:49,809 INFO L226 Difference]: Without dead ends: 36 [2022-03-18 00:59:49,809 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2022-03-18 00:59:49,811 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 54 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:59:49,812 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 31 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:59:49,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-18 00:59:49,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 28. [2022-03-18 00:59:49,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:49,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-03-18 00:59:49,828 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 19 [2022-03-18 00:59:49,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:59:49,828 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-03-18 00:59:49,828 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:59:49,828 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-03-18 00:59:49,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-18 00:59:49,829 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:59:49,829 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:59:49,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 00:59:50,052 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-03-18 00:59:50,053 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:59:50,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:59:50,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1164455000, now seen corresponding path program 5 times [2022-03-18 00:59:50,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:50,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1846215686] [2022-03-18 00:59:50,098 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:59:50,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1954785012, now seen corresponding path program 1 times [2022-03-18 00:59:50,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:50,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603525888] [2022-03-18 00:59:50,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:50,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:50,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:59:50,112 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:59:50,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:59:50,125 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:59:50,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1164455000, now seen corresponding path program 6 times [2022-03-18 00:59:50,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:50,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331720042] [2022-03-18 00:59:50,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:50,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:50,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:50,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:59:50,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:50,204 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:50,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:59:50,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331720042] [2022-03-18 00:59:50,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331720042] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:59:50,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444954115] [2022-03-18 00:59:50,205 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:59:50,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:59:50,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:59:50,206 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:59:50,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 00:59:50,246 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-18 00:59:50,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:59:50,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 00:59:50,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:59:50,326 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:50,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:59:50,425 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:50,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444954115] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:59:50,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:59:50,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-03-18 00:59:50,426 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:59:50,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1846215686] [2022-03-18 00:59:50,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1846215686] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:50,427 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:50,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-18 00:59:50,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55341315] [2022-03-18 00:59:50,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:59:50,427 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-18 00:59:50,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:50,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-18 00:59:50,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-03-18 00:59:50,428 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:59:50,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:59:50,547 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2022-03-18 00:59:50,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 00:59:50,548 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-03-18 00:59:50,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:59:50,548 INFO L225 Difference]: With dead ends: 60 [2022-03-18 00:59:50,549 INFO L226 Difference]: Without dead ends: 38 [2022-03-18 00:59:50,549 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2022-03-18 00:59:50,550 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 56 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:59:50,550 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 31 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:59:50,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-18 00:59:50,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 30. [2022-03-18 00:59:50,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:50,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-03-18 00:59:50,558 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 21 [2022-03-18 00:59:50,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:59:50,558 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-03-18 00:59:50,558 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:59:50,558 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-03-18 00:59:50,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-18 00:59:50,559 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:59:50,559 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:59:50,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 00:59:50,780 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:59:50,781 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:59:50,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:59:50,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1312242250, now seen corresponding path program 7 times [2022-03-18 00:59:50,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:50,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1034313540] [2022-03-18 00:59:50,822 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:59:50,822 INFO L85 PathProgramCache]: Analyzing trace with hash 2013890356, now seen corresponding path program 1 times [2022-03-18 00:59:50,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:50,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146928518] [2022-03-18 00:59:50,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:50,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:50,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:59:50,847 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:59:50,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:59:50,874 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:59:50,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1312242250, now seen corresponding path program 8 times [2022-03-18 00:59:50,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:50,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864606641] [2022-03-18 00:59:50,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:50,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:50,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:50,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:59:50,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:50,979 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:50,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:59:50,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864606641] [2022-03-18 00:59:50,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864606641] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:59:50,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424840100] [2022-03-18 00:59:50,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:59:50,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:59:50,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:59:50,984 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:59:51,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 00:59:51,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:59:51,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:59:51,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-18 00:59:51,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:59:51,116 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:51,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:59:51,212 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:51,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424840100] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:59:51,213 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:59:51,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-03-18 00:59:51,213 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:59:51,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1034313540] [2022-03-18 00:59:51,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1034313540] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:51,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:51,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 00:59:51,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597260969] [2022-03-18 00:59:51,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:59:51,214 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 00:59:51,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:51,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 00:59:51,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2022-03-18 00:59:51,215 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:59:51,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:59:51,357 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2022-03-18 00:59:51,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 00:59:51,358 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-03-18 00:59:51,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:59:51,358 INFO L225 Difference]: With dead ends: 64 [2022-03-18 00:59:51,359 INFO L226 Difference]: Without dead ends: 40 [2022-03-18 00:59:51,359 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2022-03-18 00:59:51,360 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 49 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:59:51,360 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 51 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:59:51,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-03-18 00:59:51,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2022-03-18 00:59:51,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:51,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-03-18 00:59:51,366 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 23 [2022-03-18 00:59:51,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:59:51,367 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-03-18 00:59:51,367 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:59:51,367 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-03-18 00:59:51,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-18 00:59:51,368 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:59:51,368 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:59:51,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 00:59:51,590 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:59:51,591 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:59:51,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:59:51,591 INFO L85 PathProgramCache]: Analyzing trace with hash -2006417516, now seen corresponding path program 9 times [2022-03-18 00:59:51,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:51,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1538449240] [2022-03-18 00:59:51,628 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:59:51,628 INFO L85 PathProgramCache]: Analyzing trace with hash 2072995700, now seen corresponding path program 1 times [2022-03-18 00:59:51,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:51,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253148116] [2022-03-18 00:59:51,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:51,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:51,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:59:51,639 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:59:51,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:59:51,649 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:59:51,649 INFO L85 PathProgramCache]: Analyzing trace with hash -2006417516, now seen corresponding path program 10 times [2022-03-18 00:59:51,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:51,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779055355] [2022-03-18 00:59:51,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:51,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:51,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:51,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:59:51,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:51,739 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:51,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:59:51,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779055355] [2022-03-18 00:59:51,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779055355] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:59:51,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854800046] [2022-03-18 00:59:51,740 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:59:51,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:59:51,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:59:51,741 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:59:51,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 00:59:51,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:59:51,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:59:51,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-18 00:59:51,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:59:51,870 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:51,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:59:52,032 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:52,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854800046] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:59:52,033 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:59:52,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-03-18 00:59:52,033 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:59:52,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1538449240] [2022-03-18 00:59:52,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1538449240] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:52,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:52,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 00:59:52,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920697803] [2022-03-18 00:59:52,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:59:52,034 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 00:59:52,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:52,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 00:59:52,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2022-03-18 00:59:52,035 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:59:52,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:59:52,177 INFO L93 Difference]: Finished difference Result 68 states and 80 transitions. [2022-03-18 00:59:52,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 00:59:52,178 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-03-18 00:59:52,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:59:52,179 INFO L225 Difference]: With dead ends: 68 [2022-03-18 00:59:52,179 INFO L226 Difference]: Without dead ends: 42 [2022-03-18 00:59:52,179 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2022-03-18 00:59:52,180 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 60 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:59:52,180 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 31 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:59:52,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-03-18 00:59:52,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 34. [2022-03-18 00:59:52,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:52,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-03-18 00:59:52,187 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 25 [2022-03-18 00:59:52,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:59:52,187 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-03-18 00:59:52,187 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:59:52,187 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-03-18 00:59:52,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-18 00:59:52,188 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:59:52,188 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:59:52,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 00:59:52,404 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,SelfDestructingSolverStorable10,SelfDestructingSolverStorable11 [2022-03-18 00:59:52,404 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:59:52,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:59:52,405 INFO L85 PathProgramCache]: Analyzing trace with hash 906050034, now seen corresponding path program 11 times [2022-03-18 00:59:52,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:52,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1313342650] [2022-03-18 00:59:52,435 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:59:52,436 INFO L85 PathProgramCache]: Analyzing trace with hash 2132101044, now seen corresponding path program 1 times [2022-03-18 00:59:52,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:52,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75287388] [2022-03-18 00:59:52,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:52,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:52,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:59:52,446 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:59:52,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:59:52,453 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:59:52,453 INFO L85 PathProgramCache]: Analyzing trace with hash 906050034, now seen corresponding path program 12 times [2022-03-18 00:59:52,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:52,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498145101] [2022-03-18 00:59:52,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:52,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:52,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:52,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:59:52,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:52,559 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:52,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:59:52,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498145101] [2022-03-18 00:59:52,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498145101] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:59:52,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223000411] [2022-03-18 00:59:52,560 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:59:52,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:59:52,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:59:52,561 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:59:52,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 00:59:52,605 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:59:52,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:59:52,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-18 00:59:52,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:59:52,705 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:52,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:59:52,873 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:52,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223000411] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:59:52,874 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:59:52,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-03-18 00:59:52,874 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:59:52,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1313342650] [2022-03-18 00:59:52,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1313342650] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:52,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:52,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 00:59:52,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731751885] [2022-03-18 00:59:52,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:59:52,875 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 00:59:52,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:52,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 00:59:52,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2022-03-18 00:59:52,876 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:59:53,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:59:53,073 INFO L93 Difference]: Finished difference Result 72 states and 84 transitions. [2022-03-18 00:59:53,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 00:59:53,073 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-03-18 00:59:53,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:59:53,074 INFO L225 Difference]: With dead ends: 72 [2022-03-18 00:59:53,074 INFO L226 Difference]: Without dead ends: 44 [2022-03-18 00:59:53,074 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2022-03-18 00:59:53,075 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 53 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:59:53,075 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 61 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:59:53,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-18 00:59:53,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2022-03-18 00:59:53,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:53,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2022-03-18 00:59:53,082 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 27 [2022-03-18 00:59:53,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:59:53,083 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2022-03-18 00:59:53,083 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:59:53,083 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2022-03-18 00:59:53,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-18 00:59:53,083 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:59:53,084 INFO L500 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:59:53,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-18 00:59:53,303 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:59:53,304 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:59:53,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:59:53,304 INFO L85 PathProgramCache]: Analyzing trace with hash -531311408, now seen corresponding path program 13 times [2022-03-18 00:59:53,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:53,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1689680762] [2022-03-18 00:59:53,338 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:59:53,338 INFO L85 PathProgramCache]: Analyzing trace with hash -2103760908, now seen corresponding path program 1 times [2022-03-18 00:59:53,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:53,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608435388] [2022-03-18 00:59:53,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:53,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:53,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:59:53,346 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:59:53,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:59:53,354 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:59:53,354 INFO L85 PathProgramCache]: Analyzing trace with hash -531311408, now seen corresponding path program 14 times [2022-03-18 00:59:53,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:53,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072991950] [2022-03-18 00:59:53,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:53,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:53,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:53,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:59:53,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:53,491 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:53,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:59:53,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072991950] [2022-03-18 00:59:53,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072991950] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:59:53,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555463238] [2022-03-18 00:59:53,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:59:53,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:59:53,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:59:53,493 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:59:53,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 00:59:53,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:59:53,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:59:53,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-18 00:59:53,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:59:53,632 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:53,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:59:53,833 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:53,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555463238] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:59:53,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:59:53,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 20 [2022-03-18 00:59:53,834 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:59:53,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1689680762] [2022-03-18 00:59:53,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1689680762] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:53,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:53,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-18 00:59:53,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375275334] [2022-03-18 00:59:53,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:59:53,835 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 00:59:53,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:53,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 00:59:53,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2022-03-18 00:59:53,836 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:59:54,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:59:54,059 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2022-03-18 00:59:54,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 00:59:54,059 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-03-18 00:59:54,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:59:54,060 INFO L225 Difference]: With dead ends: 76 [2022-03-18 00:59:54,060 INFO L226 Difference]: Without dead ends: 46 [2022-03-18 00:59:54,060 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2022-03-18 00:59:54,061 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 55 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:59:54,061 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 51 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:59:54,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-03-18 00:59:54,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 38. [2022-03-18 00:59:54,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 32 states have (on average 1.15625) internal successors, (37), 32 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:54,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2022-03-18 00:59:54,069 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 29 [2022-03-18 00:59:54,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:59:54,069 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2022-03-18 00:59:54,069 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:59:54,069 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2022-03-18 00:59:54,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-18 00:59:54,070 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:59:54,070 INFO L500 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:59:54,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-18 00:59:54,289 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:59:54,290 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:59:54,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:59:54,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1143812142, now seen corresponding path program 15 times [2022-03-18 00:59:54,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:54,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2051510086] [2022-03-18 00:59:54,321 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:59:54,322 INFO L85 PathProgramCache]: Analyzing trace with hash -2044655564, now seen corresponding path program 1 times [2022-03-18 00:59:54,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:54,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663961789] [2022-03-18 00:59:54,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:54,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:54,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:59:54,330 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:59:54,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:59:54,337 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:59:54,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1143812142, now seen corresponding path program 16 times [2022-03-18 00:59:54,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:54,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239755387] [2022-03-18 00:59:54,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:54,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:54,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:54,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:59:54,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:54,463 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:54,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:59:54,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239755387] [2022-03-18 00:59:54,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239755387] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:59:54,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292056553] [2022-03-18 00:59:54,463 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:59:54,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:59:54,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:59:54,465 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:59:54,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-18 00:59:54,509 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:59:54,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:59:54,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-18 00:59:54,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:59:54,607 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:54,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:59:54,839 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:54,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292056553] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:59:54,840 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:59:54,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 22 [2022-03-18 00:59:54,840 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:59:54,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2051510086] [2022-03-18 00:59:54,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2051510086] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:54,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:54,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 00:59:54,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708131721] [2022-03-18 00:59:54,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:59:54,841 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 00:59:54,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:54,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 00:59:54,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2022-03-18 00:59:54,842 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:59:55,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:59:55,079 INFO L93 Difference]: Finished difference Result 80 states and 92 transitions. [2022-03-18 00:59:55,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 00:59:55,080 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-03-18 00:59:55,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:59:55,080 INFO L225 Difference]: With dead ends: 80 [2022-03-18 00:59:55,080 INFO L226 Difference]: Without dead ends: 48 [2022-03-18 00:59:55,081 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=273, Invalid=657, Unknown=0, NotChecked=0, Total=930 [2022-03-18 00:59:55,082 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 57 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:59:55,082 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 51 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:59:55,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-18 00:59:55,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 40. [2022-03-18 00:59:55,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 34 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:55,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2022-03-18 00:59:55,089 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 31 [2022-03-18 00:59:55,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:59:55,089 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2022-03-18 00:59:55,089 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:59:55,089 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2022-03-18 00:59:55,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-18 00:59:55,090 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:59:55,090 INFO L500 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:59:55,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-18 00:59:55,303 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16,SelfDestructingSolverStorable17 [2022-03-18 00:59:55,303 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:59:55,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:59:55,304 INFO L85 PathProgramCache]: Analyzing trace with hash 324807692, now seen corresponding path program 17 times [2022-03-18 00:59:55,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:55,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1637788795] [2022-03-18 00:59:55,334 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:59:55,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1985550220, now seen corresponding path program 1 times [2022-03-18 00:59:55,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:55,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006452656] [2022-03-18 00:59:55,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:55,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:55,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:59:55,344 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:59:55,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:59:55,354 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:59:55,354 INFO L85 PathProgramCache]: Analyzing trace with hash 324807692, now seen corresponding path program 18 times [2022-03-18 00:59:55,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:55,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860484759] [2022-03-18 00:59:55,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:55,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:55,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:55,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:59:55,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:55,493 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:55,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:59:55,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860484759] [2022-03-18 00:59:55,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860484759] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:59:55,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114647455] [2022-03-18 00:59:55,493 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:59:55,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:59:55,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:59:55,496 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:59:55,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-18 00:59:55,563 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-18 00:59:55,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:59:55,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-18 00:59:55,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:59:55,693 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:55,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:59:55,980 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:55,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114647455] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:59:55,980 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:59:55,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 24 [2022-03-18 00:59:55,980 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:59:55,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1637788795] [2022-03-18 00:59:55,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1637788795] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:55,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:55,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 00:59:55,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63177309] [2022-03-18 00:59:55,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:59:55,981 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 00:59:55,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:55,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 00:59:55,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=387, Unknown=0, NotChecked=0, Total=552 [2022-03-18 00:59:55,982 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:59:56,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:59:56,279 INFO L93 Difference]: Finished difference Result 84 states and 96 transitions. [2022-03-18 00:59:56,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 00:59:56,280 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-03-18 00:59:56,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:59:56,281 INFO L225 Difference]: With dead ends: 84 [2022-03-18 00:59:56,281 INFO L226 Difference]: Without dead ends: 50 [2022-03-18 00:59:56,281 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=323, Invalid=799, Unknown=0, NotChecked=0, Total=1122 [2022-03-18 00:59:56,282 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 68 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:59:56,282 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 61 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:59:56,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-18 00:59:56,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2022-03-18 00:59:56,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:56,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2022-03-18 00:59:56,290 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 33 [2022-03-18 00:59:56,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:59:56,290 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2022-03-18 00:59:56,290 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:59:56,290 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2022-03-18 00:59:56,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-18 00:59:56,291 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:59:56,291 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:59:56,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-18 00:59:56,507 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,SelfDestructingSolverStorable19,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:59:56,508 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:59:56,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:59:56,508 INFO L85 PathProgramCache]: Analyzing trace with hash -759453590, now seen corresponding path program 19 times [2022-03-18 00:59:56,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:56,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [104136229] [2022-03-18 00:59:56,537 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:59:56,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1926444876, now seen corresponding path program 1 times [2022-03-18 00:59:56,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:56,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364580719] [2022-03-18 00:59:56,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:56,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:56,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:59:56,544 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:59:56,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:59:56,553 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:59:56,553 INFO L85 PathProgramCache]: Analyzing trace with hash -759453590, now seen corresponding path program 20 times [2022-03-18 00:59:56,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:56,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821332586] [2022-03-18 00:59:56,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:56,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:56,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:56,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:59:56,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:56,719 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:56,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:59:56,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821332586] [2022-03-18 00:59:56,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821332586] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:59:56,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647741284] [2022-03-18 00:59:56,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:59:56,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:59:56,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:59:56,721 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:59:56,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-18 00:59:56,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:59:56,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:59:56,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-18 00:59:56,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:59:56,900 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:56,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:59:57,293 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:57,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647741284] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:59:57,293 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:59:57,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-03-18 00:59:57,294 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:59:57,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [104136229] [2022-03-18 00:59:57,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [104136229] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:57,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:57,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-18 00:59:57,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996193139] [2022-03-18 00:59:57,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:59:57,295 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-18 00:59:57,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:57,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-18 00:59:57,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=458, Unknown=0, NotChecked=0, Total=650 [2022-03-18 00:59:57,296 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:59:57,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:59:57,607 INFO L93 Difference]: Finished difference Result 88 states and 100 transitions. [2022-03-18 00:59:57,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-18 00:59:57,607 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-03-18 00:59:57,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:59:57,609 INFO L225 Difference]: With dead ends: 88 [2022-03-18 00:59:57,609 INFO L226 Difference]: Without dead ends: 52 [2022-03-18 00:59:57,610 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=377, Invalid=955, Unknown=0, NotChecked=0, Total=1332 [2022-03-18 00:59:57,611 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 61 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:59:57,611 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 71 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:59:57,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-18 00:59:57,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 44. [2022-03-18 00:59:57,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 38 states have (on average 1.131578947368421) internal successors, (43), 38 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:57,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2022-03-18 00:59:57,629 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 35 [2022-03-18 00:59:57,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:59:57,629 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2022-03-18 00:59:57,629 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:59:57,630 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2022-03-18 00:59:57,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-18 00:59:57,635 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:59:57,635 INFO L500 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:59:57,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-18 00:59:57,847 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,SelfDestructingSolverStorable20,SelfDestructingSolverStorable21 [2022-03-18 00:59:57,847 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:59:57,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:59:57,848 INFO L85 PathProgramCache]: Analyzing trace with hash 942507336, now seen corresponding path program 21 times [2022-03-18 00:59:57,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:57,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [7188322] [2022-03-18 00:59:57,875 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:59:57,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1867339532, now seen corresponding path program 1 times [2022-03-18 00:59:57,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:57,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341672707] [2022-03-18 00:59:57,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:57,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:57,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:59:57,881 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:59:57,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:59:57,886 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:59:57,886 INFO L85 PathProgramCache]: Analyzing trace with hash 942507336, now seen corresponding path program 22 times [2022-03-18 00:59:57,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:57,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030231777] [2022-03-18 00:59:57,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:57,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:57,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:58,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:59:58,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:58,045 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:58,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:59:58,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030231777] [2022-03-18 00:59:58,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030231777] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:59:58,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520346611] [2022-03-18 00:59:58,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:59:58,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:59:58,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:59:58,048 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:59:58,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-18 00:59:58,095 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:59:58,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:59:58,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-18 00:59:58,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:59:58,221 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:58,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:59:58,582 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:58,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520346611] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:59:58,583 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:59:58,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 28 [2022-03-18 00:59:58,583 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:59:58,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [7188322] [2022-03-18 00:59:58,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [7188322] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:58,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:58,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-18 00:59:58,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822095166] [2022-03-18 00:59:58,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:59:58,584 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-18 00:59:58,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:58,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-18 00:59:58,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=535, Unknown=0, NotChecked=0, Total=756 [2022-03-18 00:59:58,585 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:59:58,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:59:58,923 INFO L93 Difference]: Finished difference Result 92 states and 104 transitions. [2022-03-18 00:59:58,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-18 00:59:58,923 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-03-18 00:59:58,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:59:58,924 INFO L225 Difference]: With dead ends: 92 [2022-03-18 00:59:58,924 INFO L226 Difference]: Without dead ends: 54 [2022-03-18 00:59:58,925 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=435, Invalid=1125, Unknown=0, NotChecked=0, Total=1560 [2022-03-18 00:59:58,925 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 63 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:59:58,926 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 51 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:59:58,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-18 00:59:58,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2022-03-18 00:59:58,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 40 states have (on average 1.125) internal successors, (45), 40 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:58,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2022-03-18 00:59:58,939 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 37 [2022-03-18 00:59:58,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:59:58,939 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2022-03-18 00:59:58,940 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:59:58,940 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2022-03-18 00:59:58,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-18 00:59:58,940 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:59:58,940 INFO L500 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:59:58,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-18 00:59:59,167 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,SelfDestructingSolverStorable22,SelfDestructingSolverStorable23 [2022-03-18 00:59:59,167 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:59:59,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:59:59,168 INFO L85 PathProgramCache]: Analyzing trace with hash 144417446, now seen corresponding path program 23 times [2022-03-18 00:59:59,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:59,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [698111478] [2022-03-18 00:59:59,194 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:59:59,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1808234188, now seen corresponding path program 1 times [2022-03-18 00:59:59,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:59,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116595113] [2022-03-18 00:59:59,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:59,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:59,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:59:59,203 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:59:59,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:59:59,210 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:59:59,210 INFO L85 PathProgramCache]: Analyzing trace with hash 144417446, now seen corresponding path program 24 times [2022-03-18 00:59:59,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:59,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677250822] [2022-03-18 00:59:59,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:59,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:59,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:59,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:59:59,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:59,385 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:59,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:59:59,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677250822] [2022-03-18 00:59:59,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677250822] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:59:59,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24475468] [2022-03-18 00:59:59,386 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:59:59,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:59:59,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:59:59,388 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:59:59,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-18 00:59:59,499 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-03-18 00:59:59,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:59:59,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-18 00:59:59,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:59:59,716 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:59,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:59:59,903 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-03-18 00:59:59,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24475468] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:59:59,903 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:59:59,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 8] total 23 [2022-03-18 00:59:59,904 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:59:59,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [698111478] [2022-03-18 00:59:59,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [698111478] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:59,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:59,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-18 00:59:59,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359824897] [2022-03-18 00:59:59,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:59:59,904 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 00:59:59,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:59,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 00:59:59,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2022-03-18 00:59:59,905 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:00:00,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:00:00,334 INFO L93 Difference]: Finished difference Result 96 states and 108 transitions. [2022-03-18 01:00:00,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-18 01:00:00,335 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-03-18 01:00:00,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:00:00,335 INFO L225 Difference]: With dead ends: 96 [2022-03-18 01:00:00,335 INFO L226 Difference]: Without dead ends: 56 [2022-03-18 01:00:00,336 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=157, Invalid=1103, Unknown=0, NotChecked=0, Total=1260 [2022-03-18 01:00:00,336 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 74 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 01:00:00,337 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 46 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 01:00:00,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-18 01:00:00,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 48. [2022-03-18 01:00:00,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 42 states have (on average 1.119047619047619) internal successors, (47), 42 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:00:00,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2022-03-18 01:00:00,344 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 39 [2022-03-18 01:00:00,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:00:00,345 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2022-03-18 01:00:00,345 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:00:00,345 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2022-03-18 01:00:00,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-18 01:00:00,345 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:00:00,345 INFO L500 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:00:00,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-18 01:00:00,546 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,SelfDestructingSolverStorable24,SelfDestructingSolverStorable25 [2022-03-18 01:00:00,546 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:00:00,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:00:00,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1979179140, now seen corresponding path program 25 times [2022-03-18 01:00:00,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:00,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1649190038] [2022-03-18 01:00:00,573 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:00:00,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1749128844, now seen corresponding path program 1 times [2022-03-18 01:00:00,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:00:00,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453701501] [2022-03-18 01:00:00,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:00:00,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:00:00,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:00:00,589 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:00:00,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:00:00,594 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:00:00,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1979179140, now seen corresponding path program 26 times [2022-03-18 01:00:00,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:00:00,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858428652] [2022-03-18 01:00:00,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:00:00,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:00:00,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:00,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:00:00,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:00,815 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:00,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:00:00,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858428652] [2022-03-18 01:00:00,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858428652] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:00:00,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626770909] [2022-03-18 01:00:00,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:00:00,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:00:00,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:00:00,820 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:00:00,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-18 01:00:00,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:00:00,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:00:00,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-18 01:00:00,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:00:01,004 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:01,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:00:01,536 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:01,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626770909] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:00:01,536 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:00:01,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 32 [2022-03-18 01:00:01,536 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:00:01,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1649190038] [2022-03-18 01:00:01,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1649190038] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:00:01,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:00:01,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-18 01:00:01,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319081896] [2022-03-18 01:00:01,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:00:01,537 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-18 01:00:01,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:01,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-18 01:00:01,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=707, Unknown=0, NotChecked=0, Total=992 [2022-03-18 01:00:01,538 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:00:01,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:00:01,966 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2022-03-18 01:00:01,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-18 01:00:01,967 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-03-18 01:00:01,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:00:01,967 INFO L225 Difference]: With dead ends: 100 [2022-03-18 01:00:01,967 INFO L226 Difference]: Without dead ends: 58 [2022-03-18 01:00:01,968 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=563, Invalid=1507, Unknown=0, NotChecked=0, Total=2070 [2022-03-18 01:00:01,968 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 67 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 01:00:01,969 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 61 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 01:00:01,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-03-18 01:00:01,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 50. [2022-03-18 01:00:01,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 44 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:00:01,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2022-03-18 01:00:01,975 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 41 [2022-03-18 01:00:01,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:00:01,975 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2022-03-18 01:00:01,975 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:00:01,976 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2022-03-18 01:00:01,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-18 01:00:01,976 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:00:01,976 INFO L500 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:00:01,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-18 01:00:02,183 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,SelfDestructingSolverStorable26,SelfDestructingSolverStorable27 [2022-03-18 01:00:02,184 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:00:02,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:00:02,184 INFO L85 PathProgramCache]: Analyzing trace with hash -46391582, now seen corresponding path program 27 times [2022-03-18 01:00:02,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:02,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1841006214] [2022-03-18 01:00:02,210 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:00:02,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1690023500, now seen corresponding path program 1 times [2022-03-18 01:00:02,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:00:02,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586741141] [2022-03-18 01:00:02,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:00:02,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:00:02,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:00:02,217 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:00:02,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:00:02,223 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:00:02,224 INFO L85 PathProgramCache]: Analyzing trace with hash -46391582, now seen corresponding path program 28 times [2022-03-18 01:00:02,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:00:02,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276596590] [2022-03-18 01:00:02,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:00:02,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:00:02,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:02,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:00:02,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:02,428 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:02,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:00:02,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276596590] [2022-03-18 01:00:02,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276596590] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:00:02,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663170963] [2022-03-18 01:00:02,429 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 01:00:02,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:00:02,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:00:02,432 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:00:02,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-18 01:00:02,493 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 01:00:02,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:00:02,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-18 01:00:02,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:00:02,640 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:02,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:00:03,234 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:03,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663170963] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:00:03,235 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:00:03,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 34 [2022-03-18 01:00:03,235 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:00:03,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1841006214] [2022-03-18 01:00:03,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1841006214] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:00:03,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:00:03,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-18 01:00:03,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303384934] [2022-03-18 01:00:03,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:00:03,236 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-18 01:00:03,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:03,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-18 01:00:03,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=802, Unknown=0, NotChecked=0, Total=1122 [2022-03-18 01:00:03,237 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:00:03,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:00:03,718 INFO L93 Difference]: Finished difference Result 104 states and 116 transitions. [2022-03-18 01:00:03,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-18 01:00:03,719 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-03-18 01:00:03,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:00:03,719 INFO L225 Difference]: With dead ends: 104 [2022-03-18 01:00:03,720 INFO L226 Difference]: Without dead ends: 60 [2022-03-18 01:00:03,721 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=633, Invalid=1719, Unknown=0, NotChecked=0, Total=2352 [2022-03-18 01:00:03,721 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 69 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 01:00:03,721 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 91 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 675 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 01:00:03,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-18 01:00:03,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 52. [2022-03-18 01:00:03,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 46 states have (on average 1.108695652173913) internal successors, (51), 46 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:00:03,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2022-03-18 01:00:03,729 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 43 [2022-03-18 01:00:03,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:00:03,729 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2022-03-18 01:00:03,729 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:00:03,729 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2022-03-18 01:00:03,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-18 01:00:03,730 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:00:03,730 INFO L500 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:00:03,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-18 01:00:03,935 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,SelfDestructingSolverStorable28,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:00:03,936 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:00:03,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:00:03,936 INFO L85 PathProgramCache]: Analyzing trace with hash -999670336, now seen corresponding path program 29 times [2022-03-18 01:00:03,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:03,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [347600580] [2022-03-18 01:00:03,961 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:00:03,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1630918156, now seen corresponding path program 1 times [2022-03-18 01:00:03,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:00:03,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356072466] [2022-03-18 01:00:03,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:00:03,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:00:03,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:00:03,980 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:00:03,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:00:03,988 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:00:03,988 INFO L85 PathProgramCache]: Analyzing trace with hash -999670336, now seen corresponding path program 30 times [2022-03-18 01:00:03,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:00:03,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877202456] [2022-03-18 01:00:03,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:00:03,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:00:03,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:04,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:00:04,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:04,225 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:04,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:00:04,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877202456] [2022-03-18 01:00:04,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877202456] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:00:04,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128114628] [2022-03-18 01:00:04,225 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 01:00:04,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:00:04,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:00:04,228 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:00:04,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-18 01:00:04,549 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-03-18 01:00:04,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:00:04,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-18 01:00:04,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:00:04,709 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:04,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:00:05,377 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:05,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128114628] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:00:05,377 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:00:05,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-03-18 01:00:05,377 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:00:05,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [347600580] [2022-03-18 01:00:05,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [347600580] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:00:05,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:00:05,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-18 01:00:05,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587349064] [2022-03-18 01:00:05,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:00:05,378 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-18 01:00:05,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:05,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-18 01:00:05,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=903, Unknown=0, NotChecked=0, Total=1260 [2022-03-18 01:00:05,379 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:00:05,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:00:05,814 INFO L93 Difference]: Finished difference Result 108 states and 120 transitions. [2022-03-18 01:00:05,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-18 01:00:05,815 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-03-18 01:00:05,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:00:05,816 INFO L225 Difference]: With dead ends: 108 [2022-03-18 01:00:05,816 INFO L226 Difference]: Without dead ends: 62 [2022-03-18 01:00:05,817 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=707, Invalid=1945, Unknown=0, NotChecked=0, Total=2652 [2022-03-18 01:00:05,819 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 80 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 01:00:05,819 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 31 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 627 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 01:00:05,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-03-18 01:00:05,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 54. [2022-03-18 01:00:05,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 48 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:00:05,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2022-03-18 01:00:05,826 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 45 [2022-03-18 01:00:05,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:00:05,827 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2022-03-18 01:00:05,827 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:00:05,827 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2022-03-18 01:00:05,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-18 01:00:05,828 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:00:05,828 INFO L500 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:00:05,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-18 01:00:06,033 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,SelfDestructingSolverStorable31,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:00:06,034 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:00:06,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:00:06,034 INFO L85 PathProgramCache]: Analyzing trace with hash 2022448414, now seen corresponding path program 31 times [2022-03-18 01:00:06,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:06,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [56283913] [2022-03-18 01:00:06,062 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:00:06,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1571812812, now seen corresponding path program 1 times [2022-03-18 01:00:06,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:00:06,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392647281] [2022-03-18 01:00:06,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:00:06,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:00:06,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:00:06,068 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:00:06,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:00:06,080 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:00:06,080 INFO L85 PathProgramCache]: Analyzing trace with hash 2022448414, now seen corresponding path program 32 times [2022-03-18 01:00:06,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:00:06,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649348529] [2022-03-18 01:00:06,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:00:06,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:00:06,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:06,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:00:06,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:06,353 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:06,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:00:06,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649348529] [2022-03-18 01:00:06,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649348529] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:00:06,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4344403] [2022-03-18 01:00:06,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:00:06,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:00:06,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:00:06,356 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:00:06,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-18 01:00:06,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:00:06,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:00:06,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-18 01:00:06,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:00:06,597 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:06,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:00:06,785 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 204 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-18 01:00:06,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4344403] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:00:06,786 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:00:06,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 8] total 27 [2022-03-18 01:00:06,786 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:00:06,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [56283913] [2022-03-18 01:00:06,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [56283913] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:00:06,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:00:06,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-18 01:00:06,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654403236] [2022-03-18 01:00:06,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:00:06,787 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-18 01:00:06,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:06,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-18 01:00:06,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2022-03-18 01:00:06,787 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:00:07,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:00:07,330 INFO L93 Difference]: Finished difference Result 112 states and 124 transitions. [2022-03-18 01:00:07,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-18 01:00:07,333 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-03-18 01:00:07,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:00:07,333 INFO L225 Difference]: With dead ends: 112 [2022-03-18 01:00:07,333 INFO L226 Difference]: Without dead ends: 64 [2022-03-18 01:00:07,334 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=201, Invalid=1691, Unknown=0, NotChecked=0, Total=1892 [2022-03-18 01:00:07,335 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 82 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 01:00:07,335 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 61 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 754 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 01:00:07,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-18 01:00:07,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 56. [2022-03-18 01:00:07,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 50 states have (on average 1.1) internal successors, (55), 50 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:00:07,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2022-03-18 01:00:07,345 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 47 [2022-03-18 01:00:07,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:00:07,345 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2022-03-18 01:00:07,345 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:00:07,345 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2022-03-18 01:00:07,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-18 01:00:07,346 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:00:07,346 INFO L500 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:00:07,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-18 01:00:07,559 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,SelfDestructingSolverStorable32,SelfDestructingSolverStorable33 [2022-03-18 01:00:07,559 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:00:07,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:00:07,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1414292228, now seen corresponding path program 33 times [2022-03-18 01:00:07,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:07,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [361404580] [2022-03-18 01:00:07,585 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:00:07,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1512707468, now seen corresponding path program 1 times [2022-03-18 01:00:07,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:00:07,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710597397] [2022-03-18 01:00:07,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:00:07,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:00:07,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:00:07,592 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:00:07,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:00:07,597 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:00:07,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1414292228, now seen corresponding path program 34 times [2022-03-18 01:00:07,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:00:07,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080402530] [2022-03-18 01:00:07,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:00:07,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:00:07,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:07,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:00:07,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:07,881 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:07,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:00:07,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080402530] [2022-03-18 01:00:07,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080402530] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:00:07,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709423812] [2022-03-18 01:00:07,881 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 01:00:07,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:00:07,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:00:07,882 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:00:07,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-18 01:00:07,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 01:00:07,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:00:07,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-18 01:00:07,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:00:08,073 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:08,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:00:08,996 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:08,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709423812] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:00:08,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:00:08,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 40 [2022-03-18 01:00:08,997 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:00:08,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [361404580] [2022-03-18 01:00:08,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [361404580] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:00:08,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:00:08,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-18 01:00:08,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743955117] [2022-03-18 01:00:08,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:00:08,997 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-18 01:00:08,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:08,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-18 01:00:08,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=1123, Unknown=0, NotChecked=0, Total=1560 [2022-03-18 01:00:08,998 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:00:09,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:00:09,504 INFO L93 Difference]: Finished difference Result 116 states and 128 transitions. [2022-03-18 01:00:09,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-18 01:00:09,505 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-03-18 01:00:09,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:00:09,505 INFO L225 Difference]: With dead ends: 116 [2022-03-18 01:00:09,506 INFO L226 Difference]: Without dead ends: 66 [2022-03-18 01:00:09,507 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=867, Invalid=2439, Unknown=0, NotChecked=0, Total=3306 [2022-03-18 01:00:09,507 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 84 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 01:00:09,508 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 41 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 795 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 01:00:09,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-03-18 01:00:09,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2022-03-18 01:00:09,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 52 states have (on average 1.0961538461538463) internal successors, (57), 52 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:00:09,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2022-03-18 01:00:09,532 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 49 [2022-03-18 01:00:09,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:00:09,533 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2022-03-18 01:00:09,533 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:00:09,533 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2022-03-18 01:00:09,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-18 01:00:09,533 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:00:09,533 INFO L500 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:00:09,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-18 01:00:09,734 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,SelfDestructingSolverStorable35,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:00:09,734 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:00:09,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:00:09,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1292198566, now seen corresponding path program 35 times [2022-03-18 01:00:09,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:09,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [925357882] [2022-03-18 01:00:09,759 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:00:09,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1453602124, now seen corresponding path program 1 times [2022-03-18 01:00:09,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:00:09,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61873006] [2022-03-18 01:00:09,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:00:09,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:00:09,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:00:09,765 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:00:09,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:00:09,770 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:00:09,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1292198566, now seen corresponding path program 36 times [2022-03-18 01:00:09,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:00:09,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128271780] [2022-03-18 01:00:09,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:00:09,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:00:09,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:10,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:00:10,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:10,062 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:10,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:00:10,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128271780] [2022-03-18 01:00:10,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128271780] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:00:10,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303804286] [2022-03-18 01:00:10,063 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 01:00:10,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:00:10,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:00:10,064 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:00:10,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-18 01:00:10,401 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-03-18 01:00:10,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:00:10,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-18 01:00:10,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:00:10,580 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:10,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:00:14,993 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:14,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303804286] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:00:14,993 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:00:14,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 25] total 46 [2022-03-18 01:00:14,994 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:00:14,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [925357882] [2022-03-18 01:00:14,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [925357882] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:00:14,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:00:14,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-18 01:00:14,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494360673] [2022-03-18 01:00:14,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:00:14,994 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-18 01:00:14,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:14,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-18 01:00:14,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=529, Invalid=1540, Unknown=1, NotChecked=0, Total=2070 [2022-03-18 01:00:14,995 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 21 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:00:15,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:00:15,687 INFO L93 Difference]: Finished difference Result 120 states and 132 transitions. [2022-03-18 01:00:15,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-18 01:00:15,687 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 21 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-03-18 01:00:15,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:00:15,688 INFO L225 Difference]: With dead ends: 120 [2022-03-18 01:00:15,688 INFO L226 Difference]: Without dead ends: 68 [2022-03-18 01:00:15,689 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1026, Invalid=3133, Unknown=1, NotChecked=0, Total=4160 [2022-03-18 01:00:15,689 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 86 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 939 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 01:00:15,690 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 76 Invalid, 981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 939 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 01:00:15,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-03-18 01:00:15,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 60. [2022-03-18 01:00:15,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 54 states have (on average 1.0925925925925926) internal successors, (59), 54 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:00:15,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2022-03-18 01:00:15,700 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 51 [2022-03-18 01:00:15,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:00:15,700 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2022-03-18 01:00:15,700 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 21 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:00:15,700 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2022-03-18 01:00:15,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-18 01:00:15,700 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:00:15,700 INFO L500 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:00:15,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-18 01:00:15,901 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-18 01:00:15,901 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:00:15,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:00:15,902 INFO L85 PathProgramCache]: Analyzing trace with hash 75693624, now seen corresponding path program 37 times [2022-03-18 01:00:15,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:15,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [223990835] [2022-03-18 01:00:15,929 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:00:15,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1394496780, now seen corresponding path program 1 times [2022-03-18 01:00:15,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:00:15,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737022739] [2022-03-18 01:00:15,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:00:15,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:00:15,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:00:15,934 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:00:15,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:00:15,939 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:00:15,939 INFO L85 PathProgramCache]: Analyzing trace with hash 75693624, now seen corresponding path program 38 times [2022-03-18 01:00:15,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:00:15,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185577806] [2022-03-18 01:00:15,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:00:15,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:00:15,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:16,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:00:16,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:16,236 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:16,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:00:16,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185577806] [2022-03-18 01:00:16,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185577806] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:00:16,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490363393] [2022-03-18 01:00:16,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:00:16,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:00:16,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:00:16,237 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:00:16,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-18 01:00:16,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:00:16,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:00:16,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-18 01:00:16,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:00:16,470 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:16,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:00:17,697 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:17,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490363393] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:00:17,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:00:17,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 44 [2022-03-18 01:00:17,697 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:00:17,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [223990835] [2022-03-18 01:00:17,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [223990835] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:00:17,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:00:17,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-18 01:00:17,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303679847] [2022-03-18 01:00:17,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:00:17,698 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-18 01:00:17,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:17,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-18 01:00:17,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=525, Invalid=1367, Unknown=0, NotChecked=0, Total=1892 [2022-03-18 01:00:17,699 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:00:18,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:00:18,406 INFO L93 Difference]: Finished difference Result 124 states and 136 transitions. [2022-03-18 01:00:18,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-18 01:00:18,407 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-03-18 01:00:18,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:00:18,407 INFO L225 Difference]: With dead ends: 124 [2022-03-18 01:00:18,407 INFO L226 Difference]: Without dead ends: 70 [2022-03-18 01:00:18,409 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1043, Invalid=2989, Unknown=0, NotChecked=0, Total=4032 [2022-03-18 01:00:18,409 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 79 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1123 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 1166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 01:00:18,409 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 126 Invalid, 1166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1123 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 01:00:18,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-18 01:00:18,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 62. [2022-03-18 01:00:18,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 56 states have (on average 1.0892857142857142) internal successors, (61), 56 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:00:18,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2022-03-18 01:00:18,419 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 53 [2022-03-18 01:00:18,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:00:18,419 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2022-03-18 01:00:18,419 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:00:18,420 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2022-03-18 01:00:18,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-18 01:00:18,420 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:00:18,420 INFO L500 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:00:18,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-18 01:00:18,620 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-18 01:00:18,621 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:00:18,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:00:18,621 INFO L85 PathProgramCache]: Analyzing trace with hash 360095638, now seen corresponding path program 39 times [2022-03-18 01:00:18,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:18,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1056161106] [2022-03-18 01:00:18,647 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:00:18,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1335391436, now seen corresponding path program 1 times [2022-03-18 01:00:18,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:00:18,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678459448] [2022-03-18 01:00:18,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:00:18,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:00:18,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:00:18,651 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:00:18,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:00:18,656 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:00:18,656 INFO L85 PathProgramCache]: Analyzing trace with hash 360095638, now seen corresponding path program 40 times [2022-03-18 01:00:18,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:00:18,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794536134] [2022-03-18 01:00:18,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:00:18,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:00:18,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:18,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:00:18,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:18,996 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:18,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:00:18,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794536134] [2022-03-18 01:00:18,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794536134] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:00:18,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763387022] [2022-03-18 01:00:18,997 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 01:00:18,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:00:18,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:00:18,998 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:00:18,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-18 01:00:19,047 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 01:00:19,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:00:19,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-18 01:00:19,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:00:19,229 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:19,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:00:20,687 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:20,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763387022] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:00:20,688 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:00:20,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 46 [2022-03-18 01:00:20,688 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:00:20,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1056161106] [2022-03-18 01:00:20,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1056161106] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:00:20,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:00:20,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-18 01:00:20,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559065832] [2022-03-18 01:00:20,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:00:20,689 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-18 01:00:20,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:20,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-18 01:00:20,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=572, Invalid=1498, Unknown=0, NotChecked=0, Total=2070 [2022-03-18 01:00:20,690 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:00:21,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:00:21,450 INFO L93 Difference]: Finished difference Result 128 states and 140 transitions. [2022-03-18 01:00:21,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-18 01:00:21,451 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-03-18 01:00:21,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:00:21,452 INFO L225 Difference]: With dead ends: 128 [2022-03-18 01:00:21,452 INFO L226 Difference]: Without dead ends: 72 [2022-03-18 01:00:21,453 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1137, Invalid=3285, Unknown=0, NotChecked=0, Total=4422 [2022-03-18 01:00:21,454 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 81 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1221 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 1266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 01:00:21,454 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 131 Invalid, 1266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1221 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 01:00:21,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-03-18 01:00:21,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 64. [2022-03-18 01:00:21,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 58 states have (on average 1.0862068965517242) internal successors, (63), 58 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:00:21,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2022-03-18 01:00:21,464 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 55 [2022-03-18 01:00:21,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:00:21,465 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2022-03-18 01:00:21,465 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:00:21,465 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2022-03-18 01:00:21,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-18 01:00:21,465 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:00:21,465 INFO L500 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:00:21,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-18 01:00:21,666 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,SelfDestructingSolverStorable40,SelfDestructingSolverStorable41 [2022-03-18 01:00:21,666 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:00:21,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:00:21,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1207475852, now seen corresponding path program 41 times [2022-03-18 01:00:21,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:21,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1560463194] [2022-03-18 01:00:21,697 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:00:21,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1276286092, now seen corresponding path program 1 times [2022-03-18 01:00:21,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:00:21,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261079383] [2022-03-18 01:00:21,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:00:21,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:00:21,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:00:21,715 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:00:21,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:00:21,720 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:00:21,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1207475852, now seen corresponding path program 42 times [2022-03-18 01:00:21,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:00:21,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478276511] [2022-03-18 01:00:21,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:00:21,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:00:21,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:22,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:00:22,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:22,052 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:22,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:00:22,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478276511] [2022-03-18 01:00:22,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478276511] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:00:22,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815641423] [2022-03-18 01:00:22,053 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 01:00:22,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:00:22,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:00:22,056 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:00:22,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-18 01:00:22,609 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2022-03-18 01:00:22,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:00:22,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 50 conjunts are in the unsatisfiable core [2022-03-18 01:00:22,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:00:22,804 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:22,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:00:26,407 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:26,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815641423] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:00:26,407 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:00:26,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 28] total 52 [2022-03-18 01:00:26,407 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:00:26,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1560463194] [2022-03-18 01:00:26,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1560463194] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:00:26,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:00:26,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-18 01:00:26,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198772621] [2022-03-18 01:00:26,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:00:26,408 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-18 01:00:26,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:26,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-18 01:00:26,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=676, Invalid=1976, Unknown=0, NotChecked=0, Total=2652 [2022-03-18 01:00:26,409 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:00:27,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:00:27,183 INFO L93 Difference]: Finished difference Result 132 states and 144 transitions. [2022-03-18 01:00:27,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-18 01:00:27,184 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-03-18 01:00:27,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:00:27,184 INFO L225 Difference]: With dead ends: 132 [2022-03-18 01:00:27,184 INFO L226 Difference]: Without dead ends: 74 [2022-03-18 01:00:27,186 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1318, Invalid=4084, Unknown=0, NotChecked=0, Total=5402 [2022-03-18 01:00:27,187 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 92 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1188 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 1236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 01:00:27,187 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 66 Invalid, 1236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1188 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 01:00:27,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-18 01:00:27,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 66. [2022-03-18 01:00:27,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 60 states have (on average 1.0833333333333333) internal successors, (65), 60 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:00:27,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2022-03-18 01:00:27,205 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 57 [2022-03-18 01:00:27,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:00:27,205 INFO L478 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2022-03-18 01:00:27,205 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:00:27,205 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2022-03-18 01:00:27,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-18 01:00:27,206 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:00:27,206 INFO L500 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:00:27,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-18 01:00:27,406 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-03-18 01:00:27,407 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:00:27,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:00:27,407 INFO L85 PathProgramCache]: Analyzing trace with hash -110156846, now seen corresponding path program 43 times [2022-03-18 01:00:27,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:27,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1786310254] [2022-03-18 01:00:27,444 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:00:27,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1217180748, now seen corresponding path program 1 times [2022-03-18 01:00:27,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:00:27,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63577891] [2022-03-18 01:00:27,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:00:27,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:00:27,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:00:27,459 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:00:27,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:00:27,471 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:00:27,471 INFO L85 PathProgramCache]: Analyzing trace with hash -110156846, now seen corresponding path program 44 times [2022-03-18 01:00:27,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:00:27,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517059076] [2022-03-18 01:00:27,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:00:27,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:00:27,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:27,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:00:27,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:27,820 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:27,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:00:27,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517059076] [2022-03-18 01:00:27,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517059076] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:00:27,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213229453] [2022-03-18 01:00:27,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:00:27,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:00:27,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:00:27,822 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:00:27,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-18 01:00:27,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:00:27,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:00:27,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-18 01:00:27,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:00:28,080 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:28,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:00:30,124 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:30,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213229453] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:00:30,124 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:00:30,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-03-18 01:00:30,125 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:00:30,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1786310254] [2022-03-18 01:00:30,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1786310254] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:00:30,125 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:00:30,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-18 01:00:30,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114464587] [2022-03-18 01:00:30,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:00:30,125 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-18 01:00:30,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:30,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-18 01:00:30,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=672, Invalid=1778, Unknown=0, NotChecked=0, Total=2450 [2022-03-18 01:00:30,131 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:00:30,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:00:30,916 INFO L93 Difference]: Finished difference Result 136 states and 148 transitions. [2022-03-18 01:00:30,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-18 01:00:30,917 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-03-18 01:00:30,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:00:30,917 INFO L225 Difference]: With dead ends: 136 [2022-03-18 01:00:30,917 INFO L226 Difference]: Without dead ends: 76 [2022-03-18 01:00:30,918 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1337, Invalid=3919, Unknown=0, NotChecked=0, Total=5256 [2022-03-18 01:00:30,919 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 85 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1321 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 1370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 01:00:30,919 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 81 Invalid, 1370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1321 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 01:00:30,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-03-18 01:00:30,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 68. [2022-03-18 01:00:30,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 62 states have (on average 1.0806451612903225) internal successors, (67), 62 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:00:30,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2022-03-18 01:00:30,931 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 59 [2022-03-18 01:00:30,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:00:30,931 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2022-03-18 01:00:30,931 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:00:30,931 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2022-03-18 01:00:30,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-18 01:00:30,931 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:00:30,931 INFO L500 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:00:30,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-18 01:00:31,132 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,SelfDestructingSolverStorable45,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:00:31,132 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:00:31,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:00:31,132 INFO L85 PathProgramCache]: Analyzing trace with hash 2146420400, now seen corresponding path program 45 times [2022-03-18 01:00:31,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:31,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [880619215] [2022-03-18 01:00:31,158 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:00:31,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1158075404, now seen corresponding path program 1 times [2022-03-18 01:00:31,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:00:31,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601592221] [2022-03-18 01:00:31,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:00:31,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:00:31,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:00:31,164 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:00:31,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:00:31,172 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:00:31,173 INFO L85 PathProgramCache]: Analyzing trace with hash 2146420400, now seen corresponding path program 46 times [2022-03-18 01:00:31,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:00:31,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841492926] [2022-03-18 01:00:31,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:00:31,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:00:31,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:31,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:00:31,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:31,596 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:31,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:00:31,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841492926] [2022-03-18 01:00:31,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841492926] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:00:31,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628102438] [2022-03-18 01:00:31,597 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 01:00:31,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:00:31,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:00:31,598 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:00:31,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-18 01:00:31,672 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 01:00:31,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:00:31,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-18 01:00:31,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:00:31,943 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:31,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:00:34,287 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:34,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628102438] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:00:34,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:00:34,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 52 [2022-03-18 01:00:34,288 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:00:34,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [880619215] [2022-03-18 01:00:34,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [880619215] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:00:34,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:00:34,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-18 01:00:34,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410346826] [2022-03-18 01:00:34,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:00:34,289 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-18 01:00:34,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:34,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-18 01:00:34,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=725, Invalid=1927, Unknown=0, NotChecked=0, Total=2652 [2022-03-18 01:00:34,290 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:00:35,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:00:35,188 INFO L93 Difference]: Finished difference Result 140 states and 152 transitions. [2022-03-18 01:00:35,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-18 01:00:35,189 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-03-18 01:00:35,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:00:35,189 INFO L225 Difference]: With dead ends: 140 [2022-03-18 01:00:35,190 INFO L226 Difference]: Without dead ends: 78 [2022-03-18 01:00:35,190 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1443, Invalid=4257, Unknown=0, NotChecked=0, Total=5700 [2022-03-18 01:00:35,191 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 87 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1512 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 1563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 01:00:35,191 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 131 Invalid, 1563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1512 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 01:00:35,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-03-18 01:00:35,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 70. [2022-03-18 01:00:35,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 64 states have (on average 1.078125) internal successors, (69), 64 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:00:35,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2022-03-18 01:00:35,200 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 61 [2022-03-18 01:00:35,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:00:35,201 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2022-03-18 01:00:35,201 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:00:35,201 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2022-03-18 01:00:35,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-18 01:00:35,201 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:00:35,201 INFO L500 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:00:35,222 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-03-18 01:00:35,415 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,SelfDestructingSolverStorable47,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:00:35,415 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:00:35,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:00:35,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1758669326, now seen corresponding path program 47 times [2022-03-18 01:00:35,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:35,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1679114988] [2022-03-18 01:00:35,448 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:00:35,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1098970060, now seen corresponding path program 1 times [2022-03-18 01:00:35,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:00:35,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534343745] [2022-03-18 01:00:35,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:00:35,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:00:35,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:00:35,453 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:00:35,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:00:35,457 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:00:35,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1758669326, now seen corresponding path program 48 times [2022-03-18 01:00:35,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:00:35,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418080964] [2022-03-18 01:00:35,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:00:35,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:00:35,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:35,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:00:35,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:35,847 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:35,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:00:35,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418080964] [2022-03-18 01:00:35,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418080964] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:00:35,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682261552] [2022-03-18 01:00:35,847 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 01:00:35,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:00:35,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:00:35,848 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) [2022-03-18 01:00:35,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-18 01:00:37,597 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2022-03-18 01:00:37,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:00:37,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-18 01:00:37,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:00:37,850 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:37,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:00:38,103 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-03-18 01:00:38,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682261552] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:00:38,103 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:00:38,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29, 8] total 35 [2022-03-18 01:00:38,104 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:00:38,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1679114988] [2022-03-18 01:00:38,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1679114988] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:00:38,104 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:00:38,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-03-18 01:00:38,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563052163] [2022-03-18 01:00:38,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:00:38,104 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-18 01:00:38,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:38,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-18 01:00:38,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1073, Unknown=0, NotChecked=0, Total=1190 [2022-03-18 01:00:38,105 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:00:39,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:00:39,117 INFO L93 Difference]: Finished difference Result 144 states and 156 transitions. [2022-03-18 01:00:39,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-18 01:00:39,118 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-03-18 01:00:39,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:00:39,118 INFO L225 Difference]: With dead ends: 144 [2022-03-18 01:00:39,118 INFO L226 Difference]: Without dead ends: 80 [2022-03-18 01:00:39,119 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 121 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=289, Invalid=3251, Unknown=0, NotChecked=0, Total=3540 [2022-03-18 01:00:39,120 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 98 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1563 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 1617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 01:00:39,120 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 106 Invalid, 1617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1563 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 01:00:39,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-03-18 01:00:39,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 72. [2022-03-18 01:00:39,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 66 states have (on average 1.0757575757575757) internal successors, (71), 66 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:00:39,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2022-03-18 01:00:39,131 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 63 [2022-03-18 01:00:39,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:00:39,131 INFO L478 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2022-03-18 01:00:39,131 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:00:39,131 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2022-03-18 01:00:39,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-18 01:00:39,131 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:00:39,132 INFO L500 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:00:39,136 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-03-18 01:00:39,332 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48,SelfDestructingSolverStorable49 [2022-03-18 01:00:39,332 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:00:39,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:00:39,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1502925332, now seen corresponding path program 49 times [2022-03-18 01:00:39,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:39,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [291204600] [2022-03-18 01:00:39,362 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:00:39,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1039864716, now seen corresponding path program 1 times [2022-03-18 01:00:39,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:00:39,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315027490] [2022-03-18 01:00:39,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:00:39,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:00:39,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:00:39,368 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:00:39,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:00:39,372 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:00:39,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1502925332, now seen corresponding path program 50 times [2022-03-18 01:00:39,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:00:39,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274910912] [2022-03-18 01:00:39,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:00:39,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:00:39,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:39,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:00:39,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:39,876 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:39,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:00:39,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274910912] [2022-03-18 01:00:39,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274910912] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:00:39,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045981156] [2022-03-18 01:00:39,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:00:39,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:00:39,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:00:39,881 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:00:39,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-18 01:00:39,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:00:39,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:00:39,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-18 01:00:39,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:00:40,229 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:40,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:00:43,219 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:43,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045981156] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:00:43,219 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:00:43,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 56 [2022-03-18 01:00:43,220 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:00:43,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [291204600] [2022-03-18 01:00:43,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [291204600] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:00:43,220 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:00:43,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-18 01:00:43,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85264730] [2022-03-18 01:00:43,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:00:43,220 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-18 01:00:43,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:43,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-18 01:00:43,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=837, Invalid=2243, Unknown=0, NotChecked=0, Total=3080 [2022-03-18 01:00:43,221 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:00:44,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:00:44,255 INFO L93 Difference]: Finished difference Result 148 states and 160 transitions. [2022-03-18 01:00:44,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-18 01:00:44,259 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-03-18 01:00:44,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:00:44,260 INFO L225 Difference]: With dead ends: 148 [2022-03-18 01:00:44,260 INFO L226 Difference]: Without dead ends: 82 [2022-03-18 01:00:44,261 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1667, Invalid=4975, Unknown=0, NotChecked=0, Total=6642 [2022-03-18 01:00:44,261 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 91 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 1762 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 1817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 01:00:44,262 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 151 Invalid, 1817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1762 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 01:00:44,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-03-18 01:00:44,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 74. [2022-03-18 01:00:44,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 68 states have (on average 1.0735294117647058) internal successors, (73), 68 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:00:44,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2022-03-18 01:00:44,274 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 65 [2022-03-18 01:00:44,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:00:44,274 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2022-03-18 01:00:44,274 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:00:44,274 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2022-03-18 01:00:44,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-18 01:00:44,275 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:00:44,275 INFO L500 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:00:44,291 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-03-18 01:00:44,475 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-03-18 01:00:44,475 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:00:44,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:00:44,476 INFO L85 PathProgramCache]: Analyzing trace with hash -569265590, now seen corresponding path program 51 times [2022-03-18 01:00:44,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:44,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1500397966] [2022-03-18 01:00:44,501 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:00:44,502 INFO L85 PathProgramCache]: Analyzing trace with hash -980759372, now seen corresponding path program 1 times [2022-03-18 01:00:44,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:00:44,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895480832] [2022-03-18 01:00:44,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:00:44,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:00:44,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:00:44,507 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:00:44,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:00:44,511 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:00:44,511 INFO L85 PathProgramCache]: Analyzing trace with hash -569265590, now seen corresponding path program 52 times [2022-03-18 01:00:44,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:00:44,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967178773] [2022-03-18 01:00:44,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:00:44,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:00:44,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:45,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:00:45,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:45,021 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:45,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:00:45,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967178773] [2022-03-18 01:00:45,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967178773] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:00:45,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211970887] [2022-03-18 01:00:45,022 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 01:00:45,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:00:45,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:00:45,023 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:00:45,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-18 01:00:45,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 01:00:45,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:00:45,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-18 01:00:45,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:00:45,416 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:45,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:00:49,002 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:49,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211970887] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:00:49,002 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:00:49,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 58 [2022-03-18 01:00:49,002 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:00:49,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1500397966] [2022-03-18 01:00:49,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1500397966] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:00:49,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:00:49,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-03-18 01:00:49,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924438341] [2022-03-18 01:00:49,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:00:49,003 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-18 01:00:49,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:49,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-18 01:00:49,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=896, Invalid=2410, Unknown=0, NotChecked=0, Total=3306 [2022-03-18 01:00:49,004 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand has 30 states, 30 states have (on average 2.1) internal successors, (63), 29 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:00:50,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:00:50,093 INFO L93 Difference]: Finished difference Result 152 states and 164 transitions. [2022-03-18 01:00:50,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-18 01:00:50,094 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1) internal successors, (63), 29 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2022-03-18 01:00:50,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:00:50,094 INFO L225 Difference]: With dead ends: 152 [2022-03-18 01:00:50,094 INFO L226 Difference]: Without dead ends: 84 [2022-03-18 01:00:50,095 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1785, Invalid=5355, Unknown=0, NotChecked=0, Total=7140 [2022-03-18 01:00:50,096 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 93 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1848 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 1905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 01:00:50,096 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 136 Invalid, 1905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1848 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 01:00:50,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-03-18 01:00:50,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 76. [2022-03-18 01:00:50,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 70 states have (on average 1.0714285714285714) internal successors, (75), 70 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:00:50,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2022-03-18 01:00:50,113 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 67 [2022-03-18 01:00:50,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:00:50,113 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2022-03-18 01:00:50,113 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1) internal successors, (63), 29 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:00:50,113 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2022-03-18 01:00:50,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-18 01:00:50,114 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:00:50,114 INFO L500 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:00:50,130 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-03-18 01:00:50,319 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,SelfDestructingSolverStorable52,SelfDestructingSolverStorable53 [2022-03-18 01:00:50,319 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:00:50,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:00:50,320 INFO L85 PathProgramCache]: Analyzing trace with hash -970418392, now seen corresponding path program 53 times [2022-03-18 01:00:50,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:50,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [682338009] [2022-03-18 01:00:50,347 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:00:50,347 INFO L85 PathProgramCache]: Analyzing trace with hash -921654028, now seen corresponding path program 1 times [2022-03-18 01:00:50,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:00:50,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077719759] [2022-03-18 01:00:50,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:00:50,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:00:50,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:00:50,353 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:00:50,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:00:50,365 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:00:50,366 INFO L85 PathProgramCache]: Analyzing trace with hash -970418392, now seen corresponding path program 54 times [2022-03-18 01:00:50,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:00:50,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202175582] [2022-03-18 01:00:50,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:00:50,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:00:50,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:50,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:00:50,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:50,861 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:50,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:00:50,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202175582] [2022-03-18 01:00:50,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202175582] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:00:50,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877094418] [2022-03-18 01:00:50,862 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 01:00:50,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:00:50,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:00:50,863 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:00:50,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-18 01:00:53,028 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2022-03-18 01:00:53,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:00:53,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 60 conjunts are in the unsatisfiable core [2022-03-18 01:00:53,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:00:53,254 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:53,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:00:57,102 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:57,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877094418] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:00:57,103 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:00:57,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 33] total 63 [2022-03-18 01:00:57,103 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:00:57,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [682338009] [2022-03-18 01:00:57,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [682338009] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:00:57,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:00:57,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-03-18 01:00:57,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730863072] [2022-03-18 01:00:57,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:00:57,104 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-18 01:00:57,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:57,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-18 01:00:57,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=977, Invalid=2929, Unknown=0, NotChecked=0, Total=3906 [2022-03-18 01:00:57,105 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:00:58,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:00:58,344 INFO L93 Difference]: Finished difference Result 156 states and 168 transitions. [2022-03-18 01:00:58,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-18 01:00:58,345 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-03-18 01:00:58,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:00:58,345 INFO L225 Difference]: With dead ends: 156 [2022-03-18 01:00:58,345 INFO L226 Difference]: Without dead ends: 86 [2022-03-18 01:00:58,347 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1934, Invalid=6256, Unknown=0, NotChecked=0, Total=8190 [2022-03-18 01:00:58,352 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 95 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 2001 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 2060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 2001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-18 01:00:58,353 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 156 Invalid, 2060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 2001 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-18 01:00:58,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-03-18 01:00:58,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 78. [2022-03-18 01:00:58,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 72 states have (on average 1.0694444444444444) internal successors, (77), 72 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:00:58,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2022-03-18 01:00:58,367 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 69 [2022-03-18 01:00:58,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:00:58,367 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2022-03-18 01:00:58,367 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:00:58,368 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2022-03-18 01:00:58,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-18 01:00:58,368 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:00:58,368 INFO L500 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:00:58,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-18 01:00:58,575 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,SelfDestructingSolverStorable55,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:00:58,575 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:00:58,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:00:58,575 INFO L85 PathProgramCache]: Analyzing trace with hash 68795526, now seen corresponding path program 55 times [2022-03-18 01:00:58,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:58,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1101928717] [2022-03-18 01:00:58,601 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:00:58,601 INFO L85 PathProgramCache]: Analyzing trace with hash -862548684, now seen corresponding path program 1 times [2022-03-18 01:00:58,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:00:58,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525830220] [2022-03-18 01:00:58,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:00:58,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:00:58,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:00:58,606 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:00:58,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:00:58,609 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:00:58,609 INFO L85 PathProgramCache]: Analyzing trace with hash 68795526, now seen corresponding path program 56 times [2022-03-18 01:00:58,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:00:58,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25841002] [2022-03-18 01:00:58,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:00:58,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:00:58,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:59,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:00:59,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:59,097 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:59,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:00:59,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25841002] [2022-03-18 01:00:59,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25841002] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:00:59,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769702856] [2022-03-18 01:00:59,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:00:59,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:00:59,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:00:59,099 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:00:59,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-18 01:00:59,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:00:59,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:00:59,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-18 01:00:59,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:00:59,433 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:59,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:00:59,748 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 609 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2022-03-18 01:00:59,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769702856] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:00:59,749 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:00:59,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 33, 8] total 39 [2022-03-18 01:00:59,749 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:00:59,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1101928717] [2022-03-18 01:00:59,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1101928717] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:00:59,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:00:59,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-03-18 01:00:59,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963371013] [2022-03-18 01:00:59,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:00:59,750 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-18 01:00:59,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:59,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-18 01:00:59,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1349, Unknown=0, NotChecked=0, Total=1482 [2022-03-18 01:00:59,751 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:01:01,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:01:01,077 INFO L93 Difference]: Finished difference Result 160 states and 172 transitions. [2022-03-18 01:01:01,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-18 01:01:01,077 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-03-18 01:01:01,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:01:01,078 INFO L225 Difference]: With dead ends: 160 [2022-03-18 01:01:01,078 INFO L226 Difference]: Without dead ends: 88 [2022-03-18 01:01:01,078 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 137 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=333, Invalid=4223, Unknown=0, NotChecked=0, Total=4556 [2022-03-18 01:01:01,079 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 97 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 2149 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 2210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 2149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-18 01:01:01,079 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 171 Invalid, 2210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 2149 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-18 01:01:01,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-03-18 01:01:01,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 80. [2022-03-18 01:01:01,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 74 states have (on average 1.0675675675675675) internal successors, (79), 74 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:01:01,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2022-03-18 01:01:01,092 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 71 [2022-03-18 01:01:01,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:01:01,092 INFO L478 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2022-03-18 01:01:01,092 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:01:01,093 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2022-03-18 01:01:01,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-18 01:01:01,093 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:01:01,093 INFO L500 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:01:01,112 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-03-18 01:01:01,299 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,SelfDestructingSolverStorable57,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:01:01,299 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:01:01,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:01:01,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1974009244, now seen corresponding path program 57 times [2022-03-18 01:01:01,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:01:01,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [898536692] [2022-03-18 01:01:01,338 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:01:01,338 INFO L85 PathProgramCache]: Analyzing trace with hash -803443340, now seen corresponding path program 1 times [2022-03-18 01:01:01,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:01:01,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101640192] [2022-03-18 01:01:01,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:01:01,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:01:01,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:01:01,343 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:01:01,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:01:01,347 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:01:01,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1974009244, now seen corresponding path program 58 times [2022-03-18 01:01:01,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:01:01,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167191588] [2022-03-18 01:01:01,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:01:01,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:01:01,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:01:01,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:01:01,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:01:01,861 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:01:01,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:01:01,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167191588] [2022-03-18 01:01:01,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167191588] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:01:01,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162451510] [2022-03-18 01:01:01,861 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 01:01:01,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:01:01,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:01:01,862 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:01:01,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-18 01:01:01,957 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 01:01:01,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:01:01,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-18 01:01:01,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:01:02,188 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:01:02,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:01:07,312 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:01:07,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162451510] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:01:07,312 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:01:07,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 64 [2022-03-18 01:01:07,313 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:01:07,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [898536692] [2022-03-18 01:01:07,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [898536692] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:01:07,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:01:07,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-03-18 01:01:07,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419686999] [2022-03-18 01:01:07,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:01:07,313 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-18 01:01:07,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:01:07,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-18 01:01:07,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1085, Invalid=2947, Unknown=0, NotChecked=0, Total=4032 [2022-03-18 01:01:07,314 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:01:08,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:01:08,577 INFO L93 Difference]: Finished difference Result 164 states and 176 transitions. [2022-03-18 01:01:08,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-18 01:01:08,577 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-03-18 01:01:08,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:01:08,578 INFO L225 Difference]: With dead ends: 164 [2022-03-18 01:01:08,578 INFO L226 Difference]: Without dead ends: 90 [2022-03-18 01:01:08,579 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=2163, Invalid=6579, Unknown=0, NotChecked=0, Total=8742 [2022-03-18 01:01:08,579 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 99 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 2148 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 2211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 2148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-18 01:01:08,579 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 101 Invalid, 2211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 2148 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-18 01:01:08,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-03-18 01:01:08,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 82. [2022-03-18 01:01:08,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 76 states have (on average 1.0657894736842106) internal successors, (81), 76 states have internal predecessors, (81), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:01:08,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2022-03-18 01:01:08,592 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 73 [2022-03-18 01:01:08,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:01:08,592 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2022-03-18 01:01:08,592 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:01:08,592 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2022-03-18 01:01:08,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-18 01:01:08,593 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:01:08,593 INFO L500 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:01:08,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-18 01:01:08,802 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58,SelfDestructingSolverStorable59 [2022-03-18 01:01:08,802 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:01:08,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:01:08,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1985628354, now seen corresponding path program 59 times [2022-03-18 01:01:08,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:01:08,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1113315873] [2022-03-18 01:01:08,829 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:01:08,829 INFO L85 PathProgramCache]: Analyzing trace with hash -744337996, now seen corresponding path program 1 times [2022-03-18 01:01:08,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:01:08,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353023025] [2022-03-18 01:01:08,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:01:08,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:01:08,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:01:08,834 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:01:08,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:01:08,839 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:01:08,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1985628354, now seen corresponding path program 60 times [2022-03-18 01:01:08,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:01:08,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633919109] [2022-03-18 01:01:08,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:01:08,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:01:08,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:01:09,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:01:09,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:01:09,399 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:01:09,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:01:09,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633919109] [2022-03-18 01:01:09,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633919109] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:01:09,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404140665] [2022-03-18 01:01:09,399 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 01:01:09,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:01:09,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:01:09,401 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:01:09,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-18 01:01:10,446 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2022-03-18 01:01:10,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:01:10,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-18 01:01:10,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:01:10,711 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:01:10,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:01:16,857 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:01:16,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404140665] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:01:16,857 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:01:16,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 66 [2022-03-18 01:01:16,857 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:01:16,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1113315873] [2022-03-18 01:01:16,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1113315873] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:01:16,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:01:16,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-03-18 01:01:16,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106917035] [2022-03-18 01:01:16,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:01:16,858 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-18 01:01:16,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:01:16,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-18 01:01:16,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1152, Invalid=3138, Unknown=0, NotChecked=0, Total=4290 [2022-03-18 01:01:16,859 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 33 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:01:18,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:01:18,197 INFO L93 Difference]: Finished difference Result 168 states and 180 transitions. [2022-03-18 01:01:18,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-18 01:01:18,198 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 33 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2022-03-18 01:01:18,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:01:18,198 INFO L225 Difference]: With dead ends: 168 [2022-03-18 01:01:18,199 INFO L226 Difference]: Without dead ends: 92 [2022-03-18 01:01:18,199 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=2297, Invalid=7015, Unknown=0, NotChecked=0, Total=9312 [2022-03-18 01:01:18,200 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 101 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 2295 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 2360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 2295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-18 01:01:18,200 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 111 Invalid, 2360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 2295 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-18 01:01:18,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-03-18 01:01:18,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 84. [2022-03-18 01:01:18,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 78 states have (on average 1.064102564102564) internal successors, (83), 78 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:01:18,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2022-03-18 01:01:18,214 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 75 [2022-03-18 01:01:18,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:01:18,214 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2022-03-18 01:01:18,214 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 33 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:01:18,214 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2022-03-18 01:01:18,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-18 01:01:18,215 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:01:18,215 INFO L500 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:01:18,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-18 01:01:18,415 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,SelfDestructingSolverStorable60,SelfDestructingSolverStorable61 [2022-03-18 01:01:18,415 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:01:18,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:01:18,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1856335776, now seen corresponding path program 61 times [2022-03-18 01:01:18,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:01:18,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1385356849] [2022-03-18 01:01:18,442 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:01:18,442 INFO L85 PathProgramCache]: Analyzing trace with hash -685232652, now seen corresponding path program 1 times [2022-03-18 01:01:18,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:01:18,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857720492] [2022-03-18 01:01:18,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:01:18,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:01:18,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:01:18,446 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:01:18,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:01:18,451 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:01:18,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1856335776, now seen corresponding path program 62 times [2022-03-18 01:01:18,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:01:18,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044376491] [2022-03-18 01:01:18,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:01:18,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:01:18,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:01:19,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:01:19,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:01:19,007 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:01:19,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:01:19,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044376491] [2022-03-18 01:01:19,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044376491] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:01:19,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631827684] [2022-03-18 01:01:19,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:01:19,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:01:19,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:01:19,008 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:01:19,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-18 01:01:19,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:01:19,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:01:19,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-18 01:01:19,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:01:19,336 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:01:19,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:01:27,145 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:01:27,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631827684] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:01:27,146 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:01:27,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 68 [2022-03-18 01:01:27,146 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:01:27,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1385356849] [2022-03-18 01:01:27,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1385356849] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:01:27,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:01:27,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-03-18 01:01:27,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317363020] [2022-03-18 01:01:27,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:01:27,146 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-18 01:01:27,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:01:27,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-18 01:01:27,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1221, Invalid=3335, Unknown=0, NotChecked=0, Total=4556 [2022-03-18 01:01:27,148 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:01:28,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:01:28,594 INFO L93 Difference]: Finished difference Result 172 states and 184 transitions. [2022-03-18 01:01:28,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-18 01:01:28,595 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2022-03-18 01:01:28,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:01:28,596 INFO L225 Difference]: With dead ends: 172 [2022-03-18 01:01:28,596 INFO L226 Difference]: Without dead ends: 94 [2022-03-18 01:01:28,597 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 124 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=2435, Invalid=7465, Unknown=0, NotChecked=0, Total=9900 [2022-03-18 01:01:28,597 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 112 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 2293 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 2361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 2293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-18 01:01:28,598 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 41 Invalid, 2361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 2293 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-18 01:01:28,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-03-18 01:01:28,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 86. [2022-03-18 01:01:28,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 80 states have (on average 1.0625) internal successors, (85), 80 states have internal predecessors, (85), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:01:28,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2022-03-18 01:01:28,616 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 77 [2022-03-18 01:01:28,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:01:28,616 INFO L478 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2022-03-18 01:01:28,616 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:01:28,616 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2022-03-18 01:01:28,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-18 01:01:28,617 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:01:28,617 INFO L500 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:01:28,635 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-03-18 01:01:28,823 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,SelfDestructingSolverStorable63,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:01:28,823 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:01:28,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:01:28,824 INFO L85 PathProgramCache]: Analyzing trace with hash -2134747394, now seen corresponding path program 63 times [2022-03-18 01:01:28,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:01:28,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1649974405] [2022-03-18 01:01:28,850 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:01:28,850 INFO L85 PathProgramCache]: Analyzing trace with hash -626127308, now seen corresponding path program 1 times [2022-03-18 01:01:28,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:01:28,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039051281] [2022-03-18 01:01:28,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:01:28,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:01:28,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:01:28,855 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:01:28,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:01:28,859 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:01:28,860 INFO L85 PathProgramCache]: Analyzing trace with hash -2134747394, now seen corresponding path program 64 times [2022-03-18 01:01:28,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:01:28,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790768546] [2022-03-18 01:01:28,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:01:28,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:01:28,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:01:29,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:01:29,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:01:29,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:01:29,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:01:29,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790768546] [2022-03-18 01:01:29,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790768546] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:01:29,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290292435] [2022-03-18 01:01:29,461 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 01:01:29,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:01:29,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:01:29,463 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:01:29,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-18 01:01:29,574 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 01:01:29,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:01:29,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-18 01:01:29,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:01:29,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:01:29,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:01:39,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:01:39,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290292435] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:01:39,208 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:01:39,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 70 [2022-03-18 01:01:39,209 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:01:39,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1649974405] [2022-03-18 01:01:39,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1649974405] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:01:39,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:01:39,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-03-18 01:01:39,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695649139] [2022-03-18 01:01:39,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:01:39,209 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-18 01:01:39,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:01:39,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-18 01:01:39,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1292, Invalid=3538, Unknown=0, NotChecked=0, Total=4830 [2022-03-18 01:01:39,210 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 35 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:01:40,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:01:40,741 INFO L93 Difference]: Finished difference Result 176 states and 188 transitions. [2022-03-18 01:01:40,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-18 01:01:40,742 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 35 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2022-03-18 01:01:40,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:01:40,742 INFO L225 Difference]: With dead ends: 176 [2022-03-18 01:01:40,742 INFO L226 Difference]: Without dead ends: 96 [2022-03-18 01:01:40,743 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=2577, Invalid=7929, Unknown=0, NotChecked=0, Total=10506 [2022-03-18 01:01:40,743 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 105 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 2619 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 2688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 2619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-18 01:01:40,743 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 141 Invalid, 2688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 2619 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-18 01:01:40,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-03-18 01:01:40,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 88. [2022-03-18 01:01:40,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 82 states have (on average 1.0609756097560976) internal successors, (87), 82 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:01:40,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2022-03-18 01:01:40,758 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 79 [2022-03-18 01:01:40,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:01:40,759 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2022-03-18 01:01:40,759 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 35 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:01:40,759 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2022-03-18 01:01:40,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-18 01:01:40,759 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:01:40,759 INFO L500 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:01:40,776 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-03-18 01:01:40,959 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,SelfDestructingSolverStorable65,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:01:40,960 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:01:40,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:01:40,960 INFO L85 PathProgramCache]: Analyzing trace with hash 2135088860, now seen corresponding path program 65 times [2022-03-18 01:01:40,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:01:40,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [103066824] [2022-03-18 01:01:40,986 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:01:40,986 INFO L85 PathProgramCache]: Analyzing trace with hash -567021964, now seen corresponding path program 1 times [2022-03-18 01:01:40,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:01:40,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665982141] [2022-03-18 01:01:40,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:01:40,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:01:40,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:01:40,990 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:01:40,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:01:40,994 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:01:40,994 INFO L85 PathProgramCache]: Analyzing trace with hash 2135088860, now seen corresponding path program 66 times [2022-03-18 01:01:40,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:01:40,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430131965] [2022-03-18 01:01:40,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:01:40,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:01:41,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:01:41,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:01:41,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:01:41,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:01:41,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:01:41,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430131965] [2022-03-18 01:01:41,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430131965] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:01:41,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801299781] [2022-03-18 01:01:41,619 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 01:01:41,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:01:41,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:01:41,620 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:01:41,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-18 01:01:43,380 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2022-03-18 01:01:43,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:01:43,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 69 conjunts are in the unsatisfiable core [2022-03-18 01:01:43,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:01:43,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:01:43,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:01:55,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:01:55,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801299781] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:01:55,236 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:01:55,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 72 [2022-03-18 01:01:55,236 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:01:55,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [103066824] [2022-03-18 01:01:55,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [103066824] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:01:55,236 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:01:55,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-03-18 01:01:55,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565926138] [2022-03-18 01:01:55,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:01:55,237 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-18 01:01:55,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:01:55,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-18 01:01:55,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1365, Invalid=3747, Unknown=0, NotChecked=0, Total=5112 [2022-03-18 01:01:55,238 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 36 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:01:56,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:01:56,813 INFO L93 Difference]: Finished difference Result 180 states and 192 transitions. [2022-03-18 01:01:56,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-18 01:01:56,813 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 36 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2022-03-18 01:01:56,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:01:56,814 INFO L225 Difference]: With dead ends: 180 [2022-03-18 01:01:56,814 INFO L226 Difference]: Without dead ends: 98 [2022-03-18 01:01:56,815 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=2723, Invalid=8407, Unknown=0, NotChecked=0, Total=11130 [2022-03-18 01:01:56,815 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 116 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2553 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 2625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 2553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-18 01:01:56,815 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 31 Invalid, 2625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 2553 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-18 01:01:56,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-03-18 01:01:56,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 90. [2022-03-18 01:01:56,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 84 states have (on average 1.0595238095238095) internal successors, (89), 84 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:01:56,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2022-03-18 01:01:56,836 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 81 [2022-03-18 01:01:56,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:01:56,836 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2022-03-18 01:01:56,837 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 36 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:01:56,837 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2022-03-18 01:01:56,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-03-18 01:01:56,837 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:01:56,837 INFO L500 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:01:56,842 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-03-18 01:01:57,038 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,SelfDestructingSolverStorable66,SelfDestructingSolverStorable67 [2022-03-18 01:01:57,038 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:01:57,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:01:57,038 INFO L85 PathProgramCache]: Analyzing trace with hash -541006022, now seen corresponding path program 67 times [2022-03-18 01:01:57,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:01:57,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [563969480] [2022-03-18 01:01:57,077 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:01:57,077 INFO L85 PathProgramCache]: Analyzing trace with hash -507916620, now seen corresponding path program 1 times [2022-03-18 01:01:57,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:01:57,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718613507] [2022-03-18 01:01:57,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:01:57,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:01:57,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:01:57,082 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:01:57,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:01:57,086 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:01:57,086 INFO L85 PathProgramCache]: Analyzing trace with hash -541006022, now seen corresponding path program 68 times [2022-03-18 01:01:57,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:01:57,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286921442] [2022-03-18 01:01:57,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:01:57,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:01:57,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:01:57,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:01:57,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:01:57,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:01:57,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:01:57,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286921442] [2022-03-18 01:01:57,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286921442] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:01:57,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526406494] [2022-03-18 01:01:57,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:01:57,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:01:57,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:01:57,754 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:01:57,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-18 01:01:57,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:01:57,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:01:57,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-18 01:01:57,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:01:58,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:01:58,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:02:13,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:02:13,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526406494] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:02:13,970 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:02:13,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 74 [2022-03-18 01:02:13,970 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:02:13,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [563969480] [2022-03-18 01:02:13,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [563969480] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:02:13,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:02:13,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-03-18 01:02:13,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128868326] [2022-03-18 01:02:13,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:02:13,971 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-18 01:02:13,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:02:13,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-18 01:02:13,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1440, Invalid=3962, Unknown=0, NotChecked=0, Total=5402 [2022-03-18 01:02:13,972 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 37 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:02:15,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:02:15,712 INFO L93 Difference]: Finished difference Result 184 states and 196 transitions. [2022-03-18 01:02:15,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-18 01:02:15,712 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 37 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-03-18 01:02:15,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:02:15,715 INFO L225 Difference]: With dead ends: 184 [2022-03-18 01:02:15,715 INFO L226 Difference]: Without dead ends: 100 [2022-03-18 01:02:15,716 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=2873, Invalid=8899, Unknown=0, NotChecked=0, Total=11772 [2022-03-18 01:02:15,716 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 109 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 2914 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 2987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 2914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-18 01:02:15,716 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 146 Invalid, 2987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 2914 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-18 01:02:15,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-18 01:02:15,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 92. [2022-03-18 01:02:15,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 86 states have (on average 1.058139534883721) internal successors, (91), 86 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:02:15,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2022-03-18 01:02:15,736 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 83 [2022-03-18 01:02:15,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:02:15,737 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2022-03-18 01:02:15,737 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 37 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:02:15,737 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2022-03-18 01:02:15,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-18 01:02:15,737 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:02:15,737 INFO L500 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:02:15,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-18 01:02:15,938 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68,SelfDestructingSolverStorable69 [2022-03-18 01:02:15,938 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:02:15,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:02:15,938 INFO L85 PathProgramCache]: Analyzing trace with hash 417222680, now seen corresponding path program 69 times [2022-03-18 01:02:15,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:02:15,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2139611762] [2022-03-18 01:02:15,964 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:02:15,964 INFO L85 PathProgramCache]: Analyzing trace with hash -448811276, now seen corresponding path program 1 times [2022-03-18 01:02:15,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:02:15,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352482303] [2022-03-18 01:02:15,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:02:15,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:02:15,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:02:15,971 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:02:15,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:02:15,975 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:02:15,975 INFO L85 PathProgramCache]: Analyzing trace with hash 417222680, now seen corresponding path program 70 times [2022-03-18 01:02:15,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:02:15,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816923784] [2022-03-18 01:02:15,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:02:15,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:02:15,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:02:16,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:02:16,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:02:16,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:02:16,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:02:16,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816923784] [2022-03-18 01:02:16,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816923784] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:02:16,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061394543] [2022-03-18 01:02:16,680 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 01:02:16,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:02:16,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:02:16,681 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:02:16,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-18 01:02:16,809 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 01:02:16,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:02:16,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 73 conjunts are in the unsatisfiable core [2022-03-18 01:02:16,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:02:17,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:02:17,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:02:36,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:02:36,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061394543] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:02:36,532 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:02:36,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 76 [2022-03-18 01:02:36,532 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:02:36,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2139611762] [2022-03-18 01:02:36,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2139611762] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:02:36,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:02:36,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-03-18 01:02:36,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307502704] [2022-03-18 01:02:36,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:02:36,533 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-18 01:02:36,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:02:36,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-18 01:02:36,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1517, Invalid=4183, Unknown=0, NotChecked=0, Total=5700 [2022-03-18 01:02:36,534 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 38 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:02:38,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:02:38,357 INFO L93 Difference]: Finished difference Result 188 states and 200 transitions. [2022-03-18 01:02:38,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-18 01:02:38,357 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 38 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2022-03-18 01:02:38,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:02:38,358 INFO L225 Difference]: With dead ends: 188 [2022-03-18 01:02:38,358 INFO L226 Difference]: Without dead ends: 102 [2022-03-18 01:02:38,359 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 20.2s TimeCoverageRelationStatistics Valid=3027, Invalid=9405, Unknown=0, NotChecked=0, Total=12432 [2022-03-18 01:02:38,360 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 111 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 3099 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 3174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 3099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-18 01:02:38,360 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 166 Invalid, 3174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 3099 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-18 01:02:38,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-03-18 01:02:38,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 94. [2022-03-18 01:02:38,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 88 states have (on average 1.0568181818181819) internal successors, (93), 88 states have internal predecessors, (93), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:02:38,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2022-03-18 01:02:38,381 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 85 [2022-03-18 01:02:38,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:02:38,381 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2022-03-18 01:02:38,381 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 38 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:02:38,381 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2022-03-18 01:02:38,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-03-18 01:02:38,382 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:02:38,382 INFO L500 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:02:38,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-18 01:02:38,590 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,SelfDestructingSolverStorable71,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:02:38,590 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:02:38,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:02:38,591 INFO L85 PathProgramCache]: Analyzing trace with hash -2142963338, now seen corresponding path program 71 times [2022-03-18 01:02:38,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:02:38,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [647708351] [2022-03-18 01:02:38,622 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:02:38,623 INFO L85 PathProgramCache]: Analyzing trace with hash -389705932, now seen corresponding path program 1 times [2022-03-18 01:02:38,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:02:38,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552491154] [2022-03-18 01:02:38,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:02:38,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:02:38,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:02:38,628 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:02:38,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:02:38,632 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:02:38,633 INFO L85 PathProgramCache]: Analyzing trace with hash -2142963338, now seen corresponding path program 72 times [2022-03-18 01:02:38,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:02:38,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323290555] [2022-03-18 01:02:38,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:02:38,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:02:38,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:02:39,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:02:39,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:02:39,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:02:39,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:02:39,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323290555] [2022-03-18 01:02:39,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323290555] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:02:39,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052587471] [2022-03-18 01:02:39,432 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 01:02:39,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:02:39,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:02:39,434 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:02:39,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-18 01:02:44,219 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2022-03-18 01:02:44,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:02:44,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 77 conjunts are in the unsatisfiable core [2022-03-18 01:02:44,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:02:44,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:02:44,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:02:45,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 999 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2022-03-18 01:02:45,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052587471] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:02:45,003 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:02:45,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 41, 8] total 47 [2022-03-18 01:02:45,003 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:02:45,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [647708351] [2022-03-18 01:02:45,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [647708351] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:02:45,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:02:45,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-03-18 01:02:45,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36688770] [2022-03-18 01:02:45,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:02:45,004 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-18 01:02:45,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:02:45,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-18 01:02:45,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1997, Unknown=0, NotChecked=0, Total=2162 [2022-03-18 01:02:45,005 INFO L87 Difference]: Start difference. First operand 94 states and 98 transitions. Second operand has 40 states, 40 states have (on average 2.075) internal successors, (83), 39 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:02:46,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:02:46,984 INFO L93 Difference]: Finished difference Result 192 states and 204 transitions. [2022-03-18 01:02:46,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-18 01:02:46,984 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 39 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2022-03-18 01:02:46,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:02:46,985 INFO L225 Difference]: With dead ends: 192 [2022-03-18 01:02:46,985 INFO L226 Difference]: Without dead ends: 104 [2022-03-18 01:02:46,986 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 169 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=421, Invalid=6551, Unknown=0, NotChecked=0, Total=6972 [2022-03-18 01:02:46,986 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 122 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 3018 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 3096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 3018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-18 01:02:46,986 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 41 Invalid, 3096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 3018 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-18 01:02:46,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-03-18 01:02:47,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 96. [2022-03-18 01:02:47,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 90 states have (on average 1.0555555555555556) internal successors, (95), 90 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:02:47,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2022-03-18 01:02:47,006 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 87 [2022-03-18 01:02:47,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:02:47,006 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2022-03-18 01:02:47,006 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 39 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:02:47,006 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2022-03-18 01:02:47,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-03-18 01:02:47,006 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:02:47,006 INFO L500 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:02:47,011 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-03-18 01:02:47,207 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,SelfDestructingSolverStorable73,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:02:47,207 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:02:47,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:02:47,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1465466028, now seen corresponding path program 73 times [2022-03-18 01:02:47,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:02:47,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1596063638] [2022-03-18 01:02:47,234 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:02:47,235 INFO L85 PathProgramCache]: Analyzing trace with hash -330600588, now seen corresponding path program 1 times [2022-03-18 01:02:47,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:02:47,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350476998] [2022-03-18 01:02:47,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:02:47,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:02:47,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:02:47,244 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:02:47,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:02:47,251 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:02:47,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1465466028, now seen corresponding path program 74 times [2022-03-18 01:02:47,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:02:47,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278600072] [2022-03-18 01:02:47,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:02:47,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:02:47,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:02:48,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:02:48,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:02:48,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:02:48,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:02:48,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278600072] [2022-03-18 01:02:48,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278600072] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:02:48,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255610462] [2022-03-18 01:02:48,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:02:48,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:02:48,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:02:48,119 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:02:48,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-18 01:02:48,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:02:48,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:02:48,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 77 conjunts are in the unsatisfiable core [2022-03-18 01:02:48,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:02:48,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:02:48,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:03:17,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:03:17,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255610462] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:03:17,902 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:03:17,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 80 [2022-03-18 01:03:17,903 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:03:17,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1596063638] [2022-03-18 01:03:17,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1596063638] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:03:17,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:03:17,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-03-18 01:03:17,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191393610] [2022-03-18 01:03:17,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:03:17,904 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-18 01:03:17,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:03:17,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-18 01:03:17,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1677, Invalid=4643, Unknown=0, NotChecked=0, Total=6320 [2022-03-18 01:03:17,904 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand has 41 states, 41 states have (on average 2.073170731707317) internal successors, (85), 40 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:03:19,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:03:19,870 INFO L93 Difference]: Finished difference Result 196 states and 208 transitions. [2022-03-18 01:03:19,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-18 01:03:19,875 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.073170731707317) internal successors, (85), 40 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-03-18 01:03:19,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:03:19,876 INFO L225 Difference]: With dead ends: 196 [2022-03-18 01:03:19,876 INFO L226 Difference]: Without dead ends: 106 [2022-03-18 01:03:19,877 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 142 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 30.0s TimeCoverageRelationStatistics Valid=3347, Invalid=10459, Unknown=0, NotChecked=0, Total=13806 [2022-03-18 01:03:19,878 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 115 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 3418 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 3497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 3418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-18 01:03:19,878 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 171 Invalid, 3497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 3418 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-18 01:03:19,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-03-18 01:03:19,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 98. [2022-03-18 01:03:19,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 92 states have (on average 1.0543478260869565) internal successors, (97), 92 states have internal predecessors, (97), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:03:19,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2022-03-18 01:03:19,895 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 89 [2022-03-18 01:03:19,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:03:19,895 INFO L478 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2022-03-18 01:03:19,895 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.073170731707317) internal successors, (85), 40 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:03:19,895 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2022-03-18 01:03:19,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-18 01:03:19,896 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:03:19,896 INFO L500 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:03:19,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-18 01:03:20,097 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,SelfDestructingSolverStorable75,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:03:20,098 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:03:20,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:03:20,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1069387186, now seen corresponding path program 75 times [2022-03-18 01:03:20,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:03:20,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [123529562] [2022-03-18 01:03:20,124 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:03:20,125 INFO L85 PathProgramCache]: Analyzing trace with hash -271495244, now seen corresponding path program 1 times [2022-03-18 01:03:20,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:03:20,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27000156] [2022-03-18 01:03:20,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:03:20,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:03:20,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:03:20,130 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:03:20,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:03:20,134 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:03:20,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1069387186, now seen corresponding path program 76 times [2022-03-18 01:03:20,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:03:20,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825412194] [2022-03-18 01:03:20,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:03:20,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:03:20,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:03:20,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:03:20,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:03:20,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:03:20,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:03:20,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825412194] [2022-03-18 01:03:20,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825412194] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:03:20,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630283401] [2022-03-18 01:03:20,993 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 01:03:20,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:03:20,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:03:20,994 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:03:20,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-18 01:03:21,092 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 01:03:21,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:03:21,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 79 conjunts are in the unsatisfiable core [2022-03-18 01:03:21,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:03:21,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:03:21,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:04:04,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:04:04,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630283401] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:04:04,350 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:04:04,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 82 [2022-03-18 01:04:04,350 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:04:04,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [123529562] [2022-03-18 01:04:04,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [123529562] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:04:04,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:04:04,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-03-18 01:04:04,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848197377] [2022-03-18 01:04:04,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:04:04,351 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-18 01:04:04,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:04:04,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-18 01:04:04,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1760, Invalid=4882, Unknown=0, NotChecked=0, Total=6642 [2022-03-18 01:04:04,352 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand has 42 states, 42 states have (on average 2.0714285714285716) internal successors, (87), 41 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:04:06,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:04:06,355 INFO L93 Difference]: Finished difference Result 200 states and 212 transitions. [2022-03-18 01:04:06,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-18 01:04:06,360 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0714285714285716) internal successors, (87), 41 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2022-03-18 01:04:06,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:04:06,360 INFO L225 Difference]: With dead ends: 200 [2022-03-18 01:04:06,361 INFO L226 Difference]: Without dead ends: 108 [2022-03-18 01:04:06,362 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 43.5s TimeCoverageRelationStatistics Valid=3513, Invalid=11007, Unknown=0, NotChecked=0, Total=14520 [2022-03-18 01:04:06,363 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 126 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 3372 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 3454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 3372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-18 01:04:06,365 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 61 Invalid, 3454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 3372 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-18 01:04:06,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-03-18 01:04:06,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2022-03-18 01:04:06,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 94 states have (on average 1.053191489361702) internal successors, (99), 94 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:04:06,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2022-03-18 01:04:06,397 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 91 [2022-03-18 01:04:06,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:04:06,397 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2022-03-18 01:04:06,397 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.0714285714285716) internal successors, (87), 41 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:04:06,397 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2022-03-18 01:04:06,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-18 01:04:06,398 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:04:06,398 INFO L500 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:04:06,423 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-03-18 01:04:06,619 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,SelfDestructingSolverStorable76,SelfDestructingSolverStorable77 [2022-03-18 01:04:06,619 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:04:06,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:04:06,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1816869008, now seen corresponding path program 77 times [2022-03-18 01:04:06,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:04:06,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [761029724] [2022-03-18 01:04:06,645 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:04:06,645 INFO L85 PathProgramCache]: Analyzing trace with hash -212389900, now seen corresponding path program 1 times [2022-03-18 01:04:06,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:04:06,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966015076] [2022-03-18 01:04:06,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:04:06,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:04:06,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:04:06,650 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:04:06,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:04:06,654 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:04:06,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1816869008, now seen corresponding path program 78 times [2022-03-18 01:04:06,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:04:06,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734236871] [2022-03-18 01:04:06,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:04:06,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:04:06,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:07,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:04:07,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:07,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:04:07,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:04:07,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734236871] [2022-03-18 01:04:07,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734236871] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:04:07,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825426508] [2022-03-18 01:04:07,511 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 01:04:07,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:04:07,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:04:07,512 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:04:07,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-18 01:04:11,731 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2022-03-18 01:04:11,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:04:11,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 84 conjunts are in the unsatisfiable core [2022-03-18 01:04:11,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:04:12,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:04:12,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:04:39,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:04:39,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825426508] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:04:39,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:04:39,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 45] total 87 [2022-03-18 01:04:39,405 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:04:39,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [761029724] [2022-03-18 01:04:39,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [761029724] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:04:39,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:04:39,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-03-18 01:04:39,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839067261] [2022-03-18 01:04:39,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:04:39,407 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-18 01:04:39,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:04:39,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-18 01:04:39,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1871, Invalid=5611, Unknown=0, NotChecked=0, Total=7482 [2022-03-18 01:04:39,410 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand has 43 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 42 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:04:41,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:04:41,676 INFO L93 Difference]: Finished difference Result 204 states and 216 transitions. [2022-03-18 01:04:41,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-18 01:04:41,676 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 42 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-03-18 01:04:41,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:04:41,677 INFO L225 Difference]: With dead ends: 204 [2022-03-18 01:04:41,677 INFO L226 Difference]: Without dead ends: 110 [2022-03-18 01:04:41,678 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 27.2s TimeCoverageRelationStatistics Valid=3719, Invalid=12283, Unknown=0, NotChecked=0, Total=16002 [2022-03-18 01:04:41,678 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 119 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 3807 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 3890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 3807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-18 01:04:41,678 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 206 Invalid, 3890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 3807 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-18 01:04:41,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-03-18 01:04:41,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 102. [2022-03-18 01:04:41,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 96 states have (on average 1.0520833333333333) internal successors, (101), 96 states have internal predecessors, (101), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:04:41,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 106 transitions. [2022-03-18 01:04:41,707 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 106 transitions. Word has length 93 [2022-03-18 01:04:41,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:04:41,707 INFO L478 AbstractCegarLoop]: Abstraction has 102 states and 106 transitions. [2022-03-18 01:04:41,707 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 42 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:04:41,707 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 106 transitions. [2022-03-18 01:04:41,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-03-18 01:04:41,708 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:04:41,709 INFO L500 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:04:41,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-18 01:04:41,917 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78,SelfDestructingSolverStorable79 [2022-03-18 01:04:41,917 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:04:41,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:04:41,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1407605778, now seen corresponding path program 79 times [2022-03-18 01:04:41,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:04:41,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1594799989] [2022-03-18 01:04:41,948 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:04:41,949 INFO L85 PathProgramCache]: Analyzing trace with hash -153284556, now seen corresponding path program 1 times [2022-03-18 01:04:41,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:04:41,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663237522] [2022-03-18 01:04:41,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:04:41,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:04:41,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:04:41,955 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:04:41,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:04:41,960 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:04:41,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1407605778, now seen corresponding path program 80 times [2022-03-18 01:04:41,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:04:41,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571726479] [2022-03-18 01:04:41,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:04:41,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:04:41,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:42,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:04:42,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:42,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:04:42,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:04:42,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571726479] [2022-03-18 01:04:42,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571726479] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:04:42,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185305998] [2022-03-18 01:04:42,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:04:42,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:04:42,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:04:42,868 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:04:42,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-18 01:04:42,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:04:42,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:04:42,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 85 conjunts are in the unsatisfiable core [2022-03-18 01:04:42,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:04:43,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:04:43,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:04:43,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1230 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2022-03-18 01:04:43,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185305998] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:04:43,885 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:04:43,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 45, 8] total 51 [2022-03-18 01:04:43,885 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:04:43,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1594799989] [2022-03-18 01:04:43,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1594799989] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:04:43,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:04:43,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-03-18 01:04:43,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880230415] [2022-03-18 01:04:43,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:04:43,885 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-18 01:04:43,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:04:43,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-18 01:04:43,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=2369, Unknown=0, NotChecked=0, Total=2550 [2022-03-18 01:04:43,886 INFO L87 Difference]: Start difference. First operand 102 states and 106 transitions. Second operand has 44 states, 44 states have (on average 2.0681818181818183) internal successors, (91), 43 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:04:46,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:04:46,417 INFO L93 Difference]: Finished difference Result 208 states and 220 transitions. [2022-03-18 01:04:46,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-18 01:04:46,417 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.0681818181818183) internal successors, (91), 43 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2022-03-18 01:04:46,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:04:46,418 INFO L225 Difference]: With dead ends: 208 [2022-03-18 01:04:46,418 INFO L226 Difference]: Without dead ends: 112 [2022-03-18 01:04:46,423 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 185 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 844 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=465, Invalid=7907, Unknown=0, NotChecked=0, Total=8372 [2022-03-18 01:04:46,424 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 121 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 3976 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 4061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 3976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-18 01:04:46,424 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 206 Invalid, 4061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 3976 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-18 01:04:46,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-03-18 01:04:46,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 104. [2022-03-18 01:04:46,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 98 states have (on average 1.0510204081632653) internal successors, (103), 98 states have internal predecessors, (103), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:04:46,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 108 transitions. [2022-03-18 01:04:46,447 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 108 transitions. Word has length 95 [2022-03-18 01:04:46,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:04:46,447 INFO L478 AbstractCegarLoop]: Abstraction has 104 states and 108 transitions. [2022-03-18 01:04:46,447 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.0681818181818183) internal successors, (91), 43 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:04:46,447 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 108 transitions. [2022-03-18 01:04:46,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-18 01:04:46,448 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:04:46,448 INFO L500 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:04:46,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-18 01:04:46,656 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2022-03-18 01:04:46,656 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:04:46,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:04:46,656 INFO L85 PathProgramCache]: Analyzing trace with hash 838512588, now seen corresponding path program 81 times [2022-03-18 01:04:46,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:04:46,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2083419983] [2022-03-18 01:04:46,683 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:04:46,683 INFO L85 PathProgramCache]: Analyzing trace with hash -94179212, now seen corresponding path program 1 times [2022-03-18 01:04:46,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:04:46,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894993148] [2022-03-18 01:04:46,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:04:46,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:04:46,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:04:46,690 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:04:46,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:04:46,694 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:04:46,694 INFO L85 PathProgramCache]: Analyzing trace with hash 838512588, now seen corresponding path program 82 times [2022-03-18 01:04:46,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:04:46,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154073120] [2022-03-18 01:04:46,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:04:46,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:04:46,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:47,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:04:47,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:47,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:04:47,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:04:47,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154073120] [2022-03-18 01:04:47,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154073120] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:04:47,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967271621] [2022-03-18 01:04:47,724 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 01:04:47,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:04:47,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:04:47,726 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:04:47,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-18 01:04:47,808 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 01:04:47,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:04:47,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 85 conjunts are in the unsatisfiable core [2022-03-18 01:04:47,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:04:48,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:04:48,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:06:00,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:06:00,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967271621] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:06:00,373 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:06:00,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 88 [2022-03-18 01:06:00,374 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:06:00,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2083419983] [2022-03-18 01:06:00,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2083419983] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:06:00,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:06:00,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-03-18 01:06:00,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520905324] [2022-03-18 01:06:00,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:06:00,374 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-18 01:06:00,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:06:00,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-18 01:06:00,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2021, Invalid=5635, Unknown=0, NotChecked=0, Total=7656 [2022-03-18 01:06:00,375 INFO L87 Difference]: Start difference. First operand 104 states and 108 transitions. Second operand has 45 states, 45 states have (on average 2.066666666666667) internal successors, (93), 44 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:06:02,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:06:02,782 INFO L93 Difference]: Finished difference Result 212 states and 224 transitions. [2022-03-18 01:06:02,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-18 01:06:02,782 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.066666666666667) internal successors, (93), 44 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 97 [2022-03-18 01:06:02,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:06:02,783 INFO L225 Difference]: With dead ends: 212 [2022-03-18 01:06:02,783 INFO L226 Difference]: Without dead ends: 114 [2022-03-18 01:06:02,784 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 154 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 949 ImplicationChecksByTransitivity, 72.3s TimeCoverageRelationStatistics Valid=4035, Invalid=12735, Unknown=0, NotChecked=0, Total=16770 [2022-03-18 01:06:02,785 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 123 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 4140 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 4227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 4140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-18 01:06:02,785 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 201 Invalid, 4227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 4140 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-18 01:06:02,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-03-18 01:06:02,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 106. [2022-03-18 01:06:02,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 100 states have (on average 1.05) internal successors, (105), 100 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:06:02,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 110 transitions. [2022-03-18 01:06:02,806 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 110 transitions. Word has length 97 [2022-03-18 01:06:02,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:06:02,806 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 110 transitions. [2022-03-18 01:06:02,807 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.066666666666667) internal successors, (93), 44 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:06:02,807 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 110 transitions. [2022-03-18 01:06:02,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-18 01:06:02,807 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:06:02,807 INFO L500 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:06:02,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-18 01:06:03,015 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,SelfDestructingSolverStorable83,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:06:03,016 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:06:03,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:06:03,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1010287574, now seen corresponding path program 83 times [2022-03-18 01:06:03,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:06:03,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1915291454] [2022-03-18 01:06:03,046 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:06:03,047 INFO L85 PathProgramCache]: Analyzing trace with hash -35073868, now seen corresponding path program 1 times [2022-03-18 01:06:03,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:06:03,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734371912] [2022-03-18 01:06:03,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:06:03,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:06:03,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:06:03,052 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:06:03,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:06:03,056 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:06:03,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1010287574, now seen corresponding path program 84 times [2022-03-18 01:06:03,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:06:03,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637666021] [2022-03-18 01:06:03,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:06:03,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:06:03,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:06:04,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:06:04,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:06:04,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:06:04,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:06:04,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637666021] [2022-03-18 01:06:04,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637666021] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:06:04,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516803194] [2022-03-18 01:06:04,032 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 01:06:04,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:06:04,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:06:04,034 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:06:04,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-18 01:06:18,675 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2022-03-18 01:06:18,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:06:18,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 91 conjunts are in the unsatisfiable core [2022-03-18 01:06:18,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:06:19,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:06:19,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:07:25,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:07:25,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516803194] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:07:25,086 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:07:25,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45, 49] total 94 [2022-03-18 01:07:25,086 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:07:25,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1915291454] [2022-03-18 01:07:25,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1915291454] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:07:25,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:07:25,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-03-18 01:07:25,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371472223] [2022-03-18 01:07:25,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:07:25,087 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-18 01:07:25,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:07:25,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-18 01:07:25,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2208, Invalid=6534, Unknown=0, NotChecked=0, Total=8742 [2022-03-18 01:07:25,088 INFO L87 Difference]: Start difference. First operand 106 states and 110 transitions. Second operand has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 45 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:07:27,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:07:27,527 INFO L93 Difference]: Finished difference Result 216 states and 228 transitions. [2022-03-18 01:07:27,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-18 01:07:27,528 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 45 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2022-03-18 01:07:27,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:07:27,528 INFO L225 Difference]: With dead ends: 216 [2022-03-18 01:07:27,528 INFO L226 Difference]: Without dead ends: 116 [2022-03-18 01:07:27,529 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 153 SyntacticMatches, 1 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1188 ImplicationChecksByTransitivity, 62.5s TimeCoverageRelationStatistics Valid=4367, Invalid=14265, Unknown=0, NotChecked=0, Total=18632 [2022-03-18 01:07:27,529 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 134 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 4029 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 4119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 4029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-18 01:07:27,529 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 46 Invalid, 4119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 4029 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-18 01:07:27,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-03-18 01:07:27,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 108. [2022-03-18 01:07:27,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 102 states have (on average 1.0490196078431373) internal successors, (107), 102 states have internal predecessors, (107), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:07:27,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 112 transitions. [2022-03-18 01:07:27,551 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 112 transitions. Word has length 99 [2022-03-18 01:07:27,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:07:27,551 INFO L478 AbstractCegarLoop]: Abstraction has 108 states and 112 transitions. [2022-03-18 01:07:27,551 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 45 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:07:27,551 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 112 transitions. [2022-03-18 01:07:27,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-03-18 01:07:27,551 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:07:27,551 INFO L500 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:07:27,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-18 01:07:27,752 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,SelfDestructingSolverStorable85,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:07:27,752 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:07:27,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:07:27,752 INFO L85 PathProgramCache]: Analyzing trace with hash 409217288, now seen corresponding path program 85 times [2022-03-18 01:07:27,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:07:27,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [310070942] [2022-03-18 01:07:27,778 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:07:27,778 INFO L85 PathProgramCache]: Analyzing trace with hash 24031476, now seen corresponding path program 1 times [2022-03-18 01:07:27,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:07:27,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077686898] [2022-03-18 01:07:27,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:07:27,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:07:27,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:07:27,781 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:07:27,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:07:27,785 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:07:27,785 INFO L85 PathProgramCache]: Analyzing trace with hash 409217288, now seen corresponding path program 86 times [2022-03-18 01:07:27,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:07:27,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408078843] [2022-03-18 01:07:27,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:07:27,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:07:27,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:07:28,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:07:28,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:07:28,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:07:28,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:07:28,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408078843] [2022-03-18 01:07:28,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408078843] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:07:28,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242107403] [2022-03-18 01:07:28,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:07:28,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:07:28,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:07:28,735 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:07:28,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-18 01:07:28,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:07:28,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:07:28,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 89 conjunts are in the unsatisfiable core [2022-03-18 01:07:28,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:07:29,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:07:29,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:09:23,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:09:23,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242107403] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:09:23,554 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:09:23,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 92 [2022-03-18 01:09:23,554 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:09:23,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [310070942] [2022-03-18 01:09:23,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [310070942] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:09:23,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:09:23,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-03-18 01:09:23,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254243289] [2022-03-18 01:09:23,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:09:23,555 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-18 01:09:23,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:09:23,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-18 01:09:23,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2205, Invalid=6167, Unknown=0, NotChecked=0, Total=8372 [2022-03-18 01:09:23,557 INFO L87 Difference]: Start difference. First operand 108 states and 112 transitions. Second operand has 47 states, 47 states have (on average 2.0638297872340425) internal successors, (97), 46 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:09:26,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:09:26,129 INFO L93 Difference]: Finished difference Result 220 states and 232 transitions. [2022-03-18 01:09:26,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-18 01:09:26,129 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.0638297872340425) internal successors, (97), 46 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 101 [2022-03-18 01:09:26,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:09:26,130 INFO L225 Difference]: With dead ends: 220 [2022-03-18 01:09:26,130 INFO L226 Difference]: Without dead ends: 118 [2022-03-18 01:09:26,131 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1038 ImplicationChecksByTransitivity, 113.2s TimeCoverageRelationStatistics Valid=4403, Invalid=13957, Unknown=0, NotChecked=0, Total=18360 [2022-03-18 01:09:26,131 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 136 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 4516 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 4608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 4516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-18 01:09:26,131 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 216 Invalid, 4608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 4516 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-18 01:09:26,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-03-18 01:09:26,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 110. [2022-03-18 01:09:26,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 104 states have (on average 1.0480769230769231) internal successors, (109), 104 states have internal predecessors, (109), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:09:26,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 114 transitions. [2022-03-18 01:09:26,156 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 114 transitions. Word has length 101 [2022-03-18 01:09:26,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:09:26,156 INFO L478 AbstractCegarLoop]: Abstraction has 110 states and 114 transitions. [2022-03-18 01:09:26,156 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.0638297872340425) internal successors, (97), 46 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:09:26,156 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 114 transitions. [2022-03-18 01:09:26,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-03-18 01:09:26,156 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:09:26,157 INFO L500 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:09:26,173 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-03-18 01:09:26,357 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,SelfDestructingSolverStorable86,SelfDestructingSolverStorable87 [2022-03-18 01:09:26,357 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:09:26,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:09:26,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1246210458, now seen corresponding path program 87 times [2022-03-18 01:09:26,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:09:26,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1404804535] [2022-03-18 01:09:26,390 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:09:26,390 INFO L85 PathProgramCache]: Analyzing trace with hash 83136820, now seen corresponding path program 1 times [2022-03-18 01:09:26,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:09:26,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250616249] [2022-03-18 01:09:26,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:09:26,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:09:26,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:09:26,394 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:09:26,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:09:26,397 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:09:26,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1246210458, now seen corresponding path program 88 times [2022-03-18 01:09:26,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:09:26,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508033737] [2022-03-18 01:09:26,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:09:26,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:09:26,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:09:27,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:09:27,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:09:27,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:09:27,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:09:27,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508033737] [2022-03-18 01:09:27,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508033737] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:09:27,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42670686] [2022-03-18 01:09:27,408 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 01:09:27,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:09:27,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:09:27,410 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:09:27,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-18 01:09:27,488 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 01:09:27,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:09:27,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 91 conjunts are in the unsatisfiable core [2022-03-18 01:09:27,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:09:27,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:09:27,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:11:48,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:11:48,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42670686] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:11:48,526 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:11:48,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47, 47] total 94 [2022-03-18 01:11:48,526 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:11:48,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1404804535] [2022-03-18 01:11:48,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1404804535] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:11:48,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:11:48,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-03-18 01:11:48,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116521166] [2022-03-18 01:11:48,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:11:48,526 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-18 01:11:48,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:11:48,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-18 01:11:48,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2300, Invalid=6442, Unknown=0, NotChecked=0, Total=8742 [2022-03-18 01:11:48,527 INFO L87 Difference]: Start difference. First operand 110 states and 114 transitions. Second operand has 48 states, 48 states have (on average 2.0625) internal successors, (99), 47 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:11:51,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:11:51,275 INFO L93 Difference]: Finished difference Result 224 states and 236 transitions. [2022-03-18 01:11:51,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-18 01:11:51,276 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0625) internal successors, (99), 47 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 103 [2022-03-18 01:11:51,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:11:51,277 INFO L225 Difference]: With dead ends: 224 [2022-03-18 01:11:51,277 INFO L226 Difference]: Without dead ends: 120 [2022-03-18 01:11:51,278 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 163 SyntacticMatches, 1 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1084 ImplicationChecksByTransitivity, 139.3s TimeCoverageRelationStatistics Valid=4593, Invalid=14589, Unknown=0, NotChecked=0, Total=19182 [2022-03-18 01:11:51,278 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 129 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 4764 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 4857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 4764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-18 01:11:51,279 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 246 Invalid, 4857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 4764 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-18 01:11:51,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-03-18 01:11:51,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 112. [2022-03-18 01:11:51,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 106 states have (on average 1.0471698113207548) internal successors, (111), 106 states have internal predecessors, (111), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:11:51,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 116 transitions. [2022-03-18 01:11:51,304 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 116 transitions. Word has length 103 [2022-03-18 01:11:51,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:11:51,305 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 116 transitions. [2022-03-18 01:11:51,305 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.0625) internal successors, (99), 47 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:11:51,305 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 116 transitions. [2022-03-18 01:11:51,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-18 01:11:51,305 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:11:51,306 INFO L500 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:11:51,330 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-03-18 01:11:51,530 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88,SelfDestructingSolverStorable89 [2022-03-18 01:11:51,530 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:11:51,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:11:51,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1320592452, now seen corresponding path program 89 times [2022-03-18 01:11:51,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:11:51,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1095135181] [2022-03-18 01:11:51,560 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:11:51,560 INFO L85 PathProgramCache]: Analyzing trace with hash 142242164, now seen corresponding path program 1 times [2022-03-18 01:11:51,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:11:51,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416231681] [2022-03-18 01:11:51,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:11:51,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:11:51,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:11:51,564 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:11:51,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:11:51,568 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:11:51,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1320592452, now seen corresponding path program 90 times [2022-03-18 01:11:51,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:11:51,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556463563] [2022-03-18 01:11:51,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:11:51,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:11:51,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:11:52,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:11:52,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:11:52,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:11:52,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:11:52,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556463563] [2022-03-18 01:11:52,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556463563] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:11:52,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822454169] [2022-03-18 01:11:52,618 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 01:11:52,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:11:52,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:11:52,621 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:11:52,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-18 01:12:11,477 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2022-03-18 01:12:11,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:12:11,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 97 conjunts are in the unsatisfiable core [2022-03-18 01:12:11,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:12:11,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:12:11,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:13:31,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:13:31,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822454169] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:13:31,494 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:13:31,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 52] total 100 [2022-03-18 01:13:31,494 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:13:31,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1095135181] [2022-03-18 01:13:31,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1095135181] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:13:31,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:13:31,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-03-18 01:13:31,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415148465] [2022-03-18 01:13:31,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:13:31,495 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-18 01:13:31,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:13:31,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-18 01:13:31,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2477, Invalid=7422, Unknown=1, NotChecked=0, Total=9900 [2022-03-18 01:13:31,496 INFO L87 Difference]: Start difference. First operand 112 states and 116 transitions. Second operand has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 48 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:13:34,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:13:34,345 INFO L93 Difference]: Finished difference Result 228 states and 240 transitions. [2022-03-18 01:13:34,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-18 01:13:34,345 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 48 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 105 [2022-03-18 01:13:34,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:13:34,346 INFO L225 Difference]: With dead ends: 228 [2022-03-18 01:13:34,346 INFO L226 Difference]: Without dead ends: 122 [2022-03-18 01:13:34,348 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 162 SyntacticMatches, 1 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1390 ImplicationChecksByTransitivity, 74.1s TimeCoverageRelationStatistics Valid=4925, Invalid=16244, Unknown=1, NotChecked=0, Total=21170 [2022-03-18 01:13:34,349 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 140 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 4863 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 4959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 4863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-18 01:13:34,349 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 201 Invalid, 4959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 4863 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-18 01:13:34,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-03-18 01:13:34,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 114. [2022-03-18 01:13:34,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 108 states have (on average 1.0462962962962963) internal successors, (113), 108 states have internal predecessors, (113), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:13:34,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 118 transitions. [2022-03-18 01:13:34,375 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 118 transitions. Word has length 105 [2022-03-18 01:13:34,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:13:34,375 INFO L478 AbstractCegarLoop]: Abstraction has 114 states and 118 transitions. [2022-03-18 01:13:34,375 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 48 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:13:34,375 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 118 transitions. [2022-03-18 01:13:34,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-03-18 01:13:34,376 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:13:34,376 INFO L500 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:13:34,383 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-03-18 01:13:34,576 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,SelfDestructingSolverStorable91,46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:13:34,576 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:13:34,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:13:34,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1588006238, now seen corresponding path program 91 times [2022-03-18 01:13:34,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:13:34,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1367721857] [2022-03-18 01:13:34,606 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:13:34,606 INFO L85 PathProgramCache]: Analyzing trace with hash 201347508, now seen corresponding path program 1 times [2022-03-18 01:13:34,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:13:34,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679795535] [2022-03-18 01:13:34,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:13:34,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:13:34,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:13:34,610 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:13:34,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:13:34,613 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:13:34,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1588006238, now seen corresponding path program 92 times [2022-03-18 01:13:34,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:13:34,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977407924] [2022-03-18 01:13:34,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:13:34,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:13:34,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:13:35,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:13:35,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:13:35,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:13:35,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:13:35,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977407924] [2022-03-18 01:13:35,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977407924] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:13:35,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950619572] [2022-03-18 01:13:35,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:13:35,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:13:35,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:13:35,722 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:13:35,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-18 01:13:35,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:13:35,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:13:35,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 95 conjunts are in the unsatisfiable core [2022-03-18 01:13:35,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:13:36,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:13:36,241 INFO L328 TraceCheckSpWp]: Computing backward predicates...