/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/Mono4_1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 14:50:53,281 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 14:50:53,283 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 14:50:53,318 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 14:50:53,355 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 14:50:53,355 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 14:50:53,357 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 14:50:53,357 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-04-06 14:50:53,364 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 14:50:53,364 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 14:50:53,365 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 14:50:53,365 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 14:50:53,365 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 14:50:53,365 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 14:50:53,365 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 14:50:53,365 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 14:50:53,365 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 14:50:53,366 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 14:50:53,366 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 14:50:53,366 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 14:50:53,366 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 14:50:53,366 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 14:50:53,366 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 14:50:53,366 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 14:50:53,366 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 14:50:53,366 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 14:50:53,367 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 14:50:53,367 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 14:50:53,367 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 14:50:53,367 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 14:50:53,367 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 14:50:53,367 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 14:50:53,367 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-04-06 14:50:53,367 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 14:50:53,529 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 14:50:53,541 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 14:50:53,542 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 14:50:53,543 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 14:50:53,544 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 14:50:53,545 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/Mono4_1.c [2022-04-06 14:50:53,581 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6174fb8bf/707a5d6f57284e5fb0cd401991e1defa/FLAG590ae3428 [2022-04-06 14:50:53,973 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 14:50:53,973 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/Mono4_1.c [2022-04-06 14:50:53,977 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6174fb8bf/707a5d6f57284e5fb0cd401991e1defa/FLAG590ae3428 [2022-04-06 14:50:53,990 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6174fb8bf/707a5d6f57284e5fb0cd401991e1defa [2022-04-06 14:50:53,992 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 14:50:53,993 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 14:50:53,995 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 14:50:53,995 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 14:50:53,998 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 14:50:53,998 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 02:50:53" (1/1) ... [2022-04-06 14:50:53,999 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22df58b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:50:53, skipping insertion in model container [2022-04-06 14:50:53,999 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 02:50:53" (1/1) ... [2022-04-06 14:50:54,004 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 14:50:54,012 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 14:50:54,157 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/Mono4_1.c[311,324] [2022-04-06 14:50:54,167 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 14:50:54,173 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 14:50:54,182 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/Mono4_1.c[311,324] [2022-04-06 14:50:54,183 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 14:50:54,191 INFO L208 MainTranslator]: Completed translation [2022-04-06 14:50:54,192 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:50:54 WrapperNode [2022-04-06 14:50:54,192 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 14:50:54,193 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 14:50:54,193 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 14:50:54,193 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 14:50:54,200 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:50:54" (1/1) ... [2022-04-06 14:50:54,200 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:50:54" (1/1) ... [2022-04-06 14:50:54,206 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:50:54" (1/1) ... [2022-04-06 14:50:54,206 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:50:54" (1/1) ... [2022-04-06 14:50:54,210 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:50:54" (1/1) ... [2022-04-06 14:50:54,212 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:50:54" (1/1) ... [2022-04-06 14:50:54,216 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:50:54" (1/1) ... [2022-04-06 14:50:54,217 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 14:50:54,218 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 14:50:54,218 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 14:50:54,218 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 14:50:54,219 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:50:54" (1/1) ... [2022-04-06 14:50:54,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 14:50:54,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:50:54,248 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 14:50:54,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 14:50:54,294 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 14:50:54,294 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 14:50:54,295 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 14:50:54,295 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 14:50:54,295 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 14:50:54,295 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 14:50:54,295 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 14:50:54,295 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 14:50:54,295 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 14:50:54,296 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 14:50:54,296 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 14:50:54,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 14:50:54,297 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 14:50:54,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 14:50:54,297 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 14:50:54,297 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 14:50:54,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 14:50:54,342 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 14:50:54,343 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 14:50:54,439 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 14:50:54,443 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 14:50:54,443 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 14:50:54,444 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 02:50:54 BoogieIcfgContainer [2022-04-06 14:50:54,444 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 14:50:54,445 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 14:50:54,445 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 14:50:54,461 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 14:50:54,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 02:50:53" (1/3) ... [2022-04-06 14:50:54,462 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32b2ba72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 02:50:54, skipping insertion in model container [2022-04-06 14:50:54,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:50:54" (2/3) ... [2022-04-06 14:50:54,462 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32b2ba72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 02:50:54, skipping insertion in model container [2022-04-06 14:50:54,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 02:50:54" (3/3) ... [2022-04-06 14:50:54,463 INFO L111 eAbstractionObserver]: Analyzing ICFG Mono4_1.c [2022-04-06 14:50:54,466 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 14:50:54,466 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 14:50:54,519 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 14:50:54,524 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 14:50:54,524 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 14:50:54,548 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 14:50:54,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-06 14:50:54,567 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:50:54,568 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:50:54,568 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:50:54,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:50:54,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1325153485, now seen corresponding path program 1 times [2022-04-06 14:50:54,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:50:54,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1640657532] [2022-04-06 14:50:54,583 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:50:54,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1325153485, now seen corresponding path program 2 times [2022-04-06 14:50:54,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:50:54,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192367178] [2022-04-06 14:50:54,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:50:54,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:50:54,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:50:54,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:50:54,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:50:54,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:50:54,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:50:54,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192367178] [2022-04-06 14:50:54,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192367178] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:50:54,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:50:54,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 14:50:54,751 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:50:54,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1640657532] [2022-04-06 14:50:54,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1640657532] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:50:54,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:50:54,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 14:50:54,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728150626] [2022-04-06 14:50:54,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:50:54,757 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 14:50:54,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:50:54,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 14:50:54,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 14:50:54,778 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:50:54,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:50:54,811 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-04-06 14:50:54,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 14:50:54,816 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-04-06 14:50:54,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:50:54,819 INFO L225 Difference]: With dead ends: 32 [2022-04-06 14:50:54,819 INFO L226 Difference]: Without dead ends: 13 [2022-04-06 14:50:54,821 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 14:50:54,823 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:50:54,823 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 23 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:50:54,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-04-06 14:50:54,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-04-06 14:50:54,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:50:54,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2022-04-06 14:50:54,849 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2022-04-06 14:50:54,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:50:54,849 INFO L478 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2022-04-06 14:50:54,849 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:50:54,849 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2022-04-06 14:50:54,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-06 14:50:54,850 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:50:54,850 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:50:54,850 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 14:50:54,851 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:50:54,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:50:54,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1315918275, now seen corresponding path program 1 times [2022-04-06 14:50:54,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:50:54,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2002413433] [2022-04-06 14:50:54,852 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:50:54,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1315918275, now seen corresponding path program 2 times [2022-04-06 14:50:54,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:50:54,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063173049] [2022-04-06 14:50:54,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:50:54,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:50:54,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:50:54,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:50:54,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:50:54,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:50:54,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:50:54,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063173049] [2022-04-06 14:50:54,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063173049] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:50:54,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:50:54,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 14:50:54,931 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:50:54,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2002413433] [2022-04-06 14:50:54,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2002413433] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:50:54,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:50:54,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 14:50:54,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921605842] [2022-04-06 14:50:54,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:50:54,932 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 14:50:54,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:50:54,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 14:50:54,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 14:50:54,933 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:50:54,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:50:54,954 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2022-04-06 14:50:54,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 14:50:54,955 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-04-06 14:50:54,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:50:54,955 INFO L225 Difference]: With dead ends: 22 [2022-04-06 14:50:54,955 INFO L226 Difference]: Without dead ends: 15 [2022-04-06 14:50:54,956 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 14:50:54,957 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:50:54,958 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 19 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:50:54,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-04-06 14:50:54,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-04-06 14:50:54,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:50:54,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-04-06 14:50:54,961 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2022-04-06 14:50:54,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:50:54,962 INFO L478 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-04-06 14:50:54,962 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:50:54,962 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-04-06 14:50:54,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-04-06 14:50:54,962 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:50:54,962 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:50:54,962 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 14:50:54,963 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:50:54,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:50:54,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1372110560, now seen corresponding path program 1 times [2022-04-06 14:50:54,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:50:54,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1830432545] [2022-04-06 14:50:55,030 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:50:55,030 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:50:55,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1209153456, now seen corresponding path program 1 times [2022-04-06 14:50:55,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:50:55,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153581506] [2022-04-06 14:50:55,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:50:55,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:50:55,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:50:55,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:50:55,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:50:55,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:50:55,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:50:55,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153581506] [2022-04-06 14:50:55,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153581506] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:50:55,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:50:55,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 14:50:55,173 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:50:55,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1830432545] [2022-04-06 14:50:55,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1830432545] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:50:55,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:50:55,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 14:50:55,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098401753] [2022-04-06 14:50:55,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:50:55,174 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 14:50:55,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:50:55,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 14:50:55,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-04-06 14:50:55,175 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:50:55,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:50:55,234 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2022-04-06 14:50:55,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 14:50:55,234 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-04-06 14:50:55,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:50:55,235 INFO L225 Difference]: With dead ends: 22 [2022-04-06 14:50:55,235 INFO L226 Difference]: Without dead ends: 17 [2022-04-06 14:50:55,235 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-04-06 14:50:55,236 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 10 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:50:55,236 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 23 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:50:55,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-04-06 14:50:55,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-04-06 14:50:55,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:50:55,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-04-06 14:50:55,240 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2022-04-06 14:50:55,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:50:55,240 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-04-06 14:50:55,240 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:50:55,240 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-04-06 14:50:55,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-04-06 14:50:55,241 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:50:55,243 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:50:55,243 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-06 14:50:55,244 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:50:55,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:50:55,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1059749499, now seen corresponding path program 1 times [2022-04-06 14:50:55,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:50:55,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1654551710] [2022-04-06 14:50:55,287 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:50:55,347 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:50:55,347 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:50:55,348 INFO L85 PathProgramCache]: Analyzing trace with hash 603671471, now seen corresponding path program 1 times [2022-04-06 14:50:55,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:50:55,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559196838] [2022-04-06 14:50:55,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:50:55,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:50:55,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:50:55,357 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:50:55,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:50:55,373 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:50:55,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1059749499, now seen corresponding path program 2 times [2022-04-06 14:50:55,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:50:55,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642839862] [2022-04-06 14:50:55,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:50:55,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:50:55,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:50:55,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:50:55,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:50:55,398 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:50:55,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:50:55,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642839862] [2022-04-06 14:50:55,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642839862] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:50:55,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172570291] [2022-04-06 14:50:55,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:50:55,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:50:55,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:50:55,400 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:50:55,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 14:50:55,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:50:55,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:50:55,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2022-04-06 14:50:55,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:50:55,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:50:55,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:50:55,518 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:50:55,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172570291] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:50:55,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:50:55,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-04-06 14:50:55,519 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:50:55,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1654551710] [2022-04-06 14:50:55,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1654551710] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:50:55,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:50:55,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 14:50:55,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089257648] [2022-04-06 14:50:55,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:50:55,520 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 14:50:55,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:50:55,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 14:50:55,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-04-06 14:50:55,521 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:50:55,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:50:55,548 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2022-04-06 14:50:55,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 14:50:55,548 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-04-06 14:50:55,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:50:55,549 INFO L225 Difference]: With dead ends: 26 [2022-04-06 14:50:55,549 INFO L226 Difference]: Without dead ends: 19 [2022-04-06 14:50:55,549 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-04-06 14:50:55,550 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:50:55,550 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 24 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:50:55,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-04-06 14:50:55,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-04-06 14:50:55,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:50:55,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-04-06 14:50:55,554 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2022-04-06 14:50:55,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:50:55,554 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-04-06 14:50:55,554 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:50:55,554 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-04-06 14:50:55,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 14:50:55,554 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:50:55,554 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:50:55,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 14:50:55,770 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:50:55,771 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:50:55,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:50:55,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1870563496, now seen corresponding path program 3 times [2022-04-06 14:50:55,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:50:55,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1384081741] [2022-04-06 14:50:55,804 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:50:55,880 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:50:55,881 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:50:55,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1641763665, now seen corresponding path program 1 times [2022-04-06 14:50:55,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:50:55,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635825037] [2022-04-06 14:50:55,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:50:55,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:50:55,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:50:55,892 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:50:55,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:50:55,915 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:50:55,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1870563496, now seen corresponding path program 4 times [2022-04-06 14:50:55,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:50:55,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618058610] [2022-04-06 14:50:55,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:50:55,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:50:55,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:50:56,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:50:56,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:50:56,017 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 14:50:56,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:50:56,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618058610] [2022-04-06 14:50:56,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618058610] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:50:56,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680453692] [2022-04-06 14:50:56,018 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:50:56,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:50:56,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:50:56,036 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:50:56,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 14:50:56,079 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:50:56,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:50:56,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 14:50:56,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:50:56,132 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:50:56,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:50:56,182 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:50:56,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680453692] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:50:56,183 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:50:56,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 14 [2022-04-06 14:50:56,183 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:50:56,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1384081741] [2022-04-06 14:50:56,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1384081741] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:50:56,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:50:56,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 14:50:56,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376112868] [2022-04-06 14:50:56,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:50:56,184 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 14:50:56,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:50:56,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 14:50:56,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-04-06 14:50:56,185 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:50:56,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:50:56,251 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2022-04-06 14:50:56,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 14:50:56,252 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-04-06 14:50:56,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:50:56,252 INFO L225 Difference]: With dead ends: 26 [2022-04-06 14:50:56,252 INFO L226 Difference]: Without dead ends: 21 [2022-04-06 14:50:56,253 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-04-06 14:50:56,254 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 20 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:50:56,254 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 34 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:50:56,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-04-06 14:50:56,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-04-06 14:50:56,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:50:56,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2022-04-06 14:50:56,258 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 17 [2022-04-06 14:50:56,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:50:56,258 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2022-04-06 14:50:56,258 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:50:56,258 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2022-04-06 14:50:56,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-04-06 14:50:56,259 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:50:56,259 INFO L499 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:50:56,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 14:50:56,476 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6,SelfDestructingSolverStorable5 [2022-04-06 14:50:56,476 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:50:56,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:50:56,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1212152141, now seen corresponding path program 5 times [2022-04-06 14:50:56,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:50:56,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1995379045] [2022-04-06 14:50:56,525 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:50:56,595 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:50:56,595 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:50:56,596 INFO L85 PathProgramCache]: Analyzing trace with hash 407768495, now seen corresponding path program 1 times [2022-04-06 14:50:56,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:50:56,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869229725] [2022-04-06 14:50:56,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:50:56,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:50:56,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:50:56,620 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:50:56,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:50:56,626 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:50:56,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1212152141, now seen corresponding path program 6 times [2022-04-06 14:50:56,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:50:56,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996177464] [2022-04-06 14:50:56,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:50:56,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:50:56,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:50:56,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:50:56,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:50:56,665 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:50:56,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:50:56,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996177464] [2022-04-06 14:50:56,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996177464] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:50:56,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807562117] [2022-04-06 14:50:56,670 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:50:56,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:50:56,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:50:56,671 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:50:56,705 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 14:50:56,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:50:56,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 14:50:56,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 14:50:56,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:50:56,748 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 14:50:56,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:50:56,793 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 14:50:56,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807562117] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:50:56,794 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:50:56,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2022-04-06 14:50:56,794 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:50:56,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1995379045] [2022-04-06 14:50:56,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1995379045] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:50:56,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:50:56,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 14:50:56,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984903071] [2022-04-06 14:50:56,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:50:56,796 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 14:50:56,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:50:56,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 14:50:56,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-04-06 14:50:56,797 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:50:56,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:50:56,836 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2022-04-06 14:50:56,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 14:50:56,836 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-04-06 14:50:56,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:50:56,838 INFO L225 Difference]: With dead ends: 32 [2022-04-06 14:50:56,838 INFO L226 Difference]: Without dead ends: 23 [2022-04-06 14:50:56,839 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2022-04-06 14:50:56,840 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:50:56,841 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 24 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:50:56,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-04-06 14:50:56,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-04-06 14:50:56,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:50:56,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-04-06 14:50:56,849 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 19 [2022-04-06 14:50:56,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:50:56,849 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-04-06 14:50:56,849 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:50:56,849 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-04-06 14:50:56,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-04-06 14:50:56,850 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:50:56,850 INFO L499 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:50:56,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 14:50:57,066 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:50:57,067 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:50:57,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:50:57,067 INFO L85 PathProgramCache]: Analyzing trace with hash 553994512, now seen corresponding path program 7 times [2022-04-06 14:50:57,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:50:57,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [943035905] [2022-04-06 14:50:57,110 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:50:57,169 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:50:57,170 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:50:57,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1837666641, now seen corresponding path program 1 times [2022-04-06 14:50:57,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:50:57,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806119106] [2022-04-06 14:50:57,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:50:57,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:50:57,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:50:57,175 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:50:57,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:50:57,180 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:50:57,180 INFO L85 PathProgramCache]: Analyzing trace with hash 553994512, now seen corresponding path program 8 times [2022-04-06 14:50:57,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:50:57,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084718906] [2022-04-06 14:50:57,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:50:57,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:50:57,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:50:57,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:50:57,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:50:57,213 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:50:57,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:50:57,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084718906] [2022-04-06 14:50:57,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084718906] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:50:57,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900424684] [2022-04-06 14:50:57,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:50:57,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:50:57,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:50:57,228 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:50:57,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 14:50:57,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:50:57,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:50:57,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 14:50:57,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:50:57,299 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:50:57,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:50:57,359 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:50:57,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900424684] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:50:57,360 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:50:57,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-04-06 14:50:57,360 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:50:57,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [943035905] [2022-04-06 14:50:57,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [943035905] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:50:57,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:50:57,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 14:50:57,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18503325] [2022-04-06 14:50:57,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:50:57,360 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 14:50:57,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:50:57,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 14:50:57,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-04-06 14:50:57,361 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:50:57,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:50:57,410 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2022-04-06 14:50:57,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 14:50:57,411 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 [2022-04-06 14:50:57,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:50:57,411 INFO L225 Difference]: With dead ends: 34 [2022-04-06 14:50:57,411 INFO L226 Difference]: Without dead ends: 25 [2022-04-06 14:50:57,412 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=138, Unknown=0, NotChecked=0, Total=240 [2022-04-06 14:50:57,412 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 12 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:50:57,412 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 34 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:50:57,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-04-06 14:50:57,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-04-06 14:50:57,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:50:57,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-04-06 14:50:57,415 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 21 [2022-04-06 14:50:57,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:50:57,416 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-04-06 14:50:57,416 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) [2022-04-06 14:50:57,416 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-04-06 14:50:57,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 14:50:57,416 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:50:57,416 INFO L499 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:50:57,434 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-04-06 14:50:57,632 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:50:57,632 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:50:57,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:50:57,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1308846125, now seen corresponding path program 9 times [2022-04-06 14:50:57,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:50:57,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1365636425] [2022-04-06 14:50:57,661 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:50:57,721 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:50:57,721 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:50:57,721 INFO L85 PathProgramCache]: Analyzing trace with hash 211865519, now seen corresponding path program 1 times [2022-04-06 14:50:57,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:50:57,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724495089] [2022-04-06 14:50:57,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:50:57,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:50:57,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:50:57,726 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:50:57,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:50:57,731 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:50:57,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1308846125, now seen corresponding path program 10 times [2022-04-06 14:50:57,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:50:57,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932668560] [2022-04-06 14:50:57,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:50:57,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:50:57,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:50:57,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:50:57,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:50:57,765 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:50:57,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:50:57,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932668560] [2022-04-06 14:50:57,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932668560] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:50:57,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743476111] [2022-04-06 14:50:57,766 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:50:57,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:50:57,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:50:57,767 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:50:57,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 14:50:57,810 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:50:57,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:50:57,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 14:50:57,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:50:57,844 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:50:57,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:50:57,919 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:50:57,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743476111] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:50:57,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:50:57,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-04-06 14:50:57,920 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:50:57,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1365636425] [2022-04-06 14:50:57,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1365636425] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:50:57,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:50:57,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 14:50:57,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962306270] [2022-04-06 14:50:57,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:50:57,921 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 14:50:57,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:50:57,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 14:50:57,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-04-06 14:50:57,921 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:50:57,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:50:57,991 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2022-04-06 14:50:57,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 14:50:57,991 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 [2022-04-06 14:50:57,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:50:57,992 INFO L225 Difference]: With dead ends: 36 [2022-04-06 14:50:57,992 INFO L226 Difference]: Without dead ends: 27 [2022-04-06 14:50:57,992 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=196, Unknown=0, NotChecked=0, Total=342 [2022-04-06 14:50:57,993 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:50:57,993 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 24 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:50:57,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-04-06 14:50:57,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-04-06 14:50:57,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:50:57,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-04-06 14:50:57,996 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 23 [2022-04-06 14:50:57,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:50:57,996 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-04-06 14:50:57,996 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) [2022-04-06 14:50:57,996 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-04-06 14:50:57,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-06 14:50:57,997 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:50:57,997 INFO L499 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:50:58,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 14:50:58,212 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11,SelfDestructingSolverStorable12 [2022-04-06 14:50:58,212 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:50:58,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:50:58,213 INFO L85 PathProgramCache]: Analyzing trace with hash 871773194, now seen corresponding path program 11 times [2022-04-06 14:50:58,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:50:58,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1522256271] [2022-04-06 14:50:58,241 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:50:58,295 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:50:58,295 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:50:58,295 INFO L85 PathProgramCache]: Analyzing trace with hash -2033569617, now seen corresponding path program 1 times [2022-04-06 14:50:58,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:50:58,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961509230] [2022-04-06 14:50:58,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:50:58,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:50:58,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:50:58,300 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:50:58,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:50:58,305 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:50:58,305 INFO L85 PathProgramCache]: Analyzing trace with hash 871773194, now seen corresponding path program 12 times [2022-04-06 14:50:58,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:50:58,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295007048] [2022-04-06 14:50:58,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:50:58,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:50:58,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:50:58,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:50:58,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:50:58,362 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:50:58,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:50:58,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295007048] [2022-04-06 14:50:58,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295007048] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:50:58,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148123948] [2022-04-06 14:50:58,363 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:50:58,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:50:58,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:50:58,364 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:50:58,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 14:50:58,420 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 14:50:58,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:50:58,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 14:50:58,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:50:58,492 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 14:50:58,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:50:58,579 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 14:50:58,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148123948] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:50:58,579 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:50:58,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 17 [2022-04-06 14:50:58,580 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:50:58,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1522256271] [2022-04-06 14:50:58,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1522256271] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:50:58,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:50:58,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 14:50:58,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381661726] [2022-04-06 14:50:58,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:50:58,580 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 14:50:58,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:50:58,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 14:50:58,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2022-04-06 14:50:58,581 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:50:58,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:50:58,639 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2022-04-06 14:50:58,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 14:50:58,639 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 [2022-04-06 14:50:58,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:50:58,640 INFO L225 Difference]: With dead ends: 38 [2022-04-06 14:50:58,640 INFO L226 Difference]: Without dead ends: 29 [2022-04-06 14:50:58,640 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=224, Invalid=282, Unknown=0, NotChecked=0, Total=506 [2022-04-06 14:50:58,641 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 14 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:50:58,641 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 29 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:50:58,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-04-06 14:50:58,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-04-06 14:50:58,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:50:58,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2022-04-06 14:50:58,644 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 25 [2022-04-06 14:50:58,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:50:58,644 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2022-04-06 14:50:58,644 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) [2022-04-06 14:50:58,644 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2022-04-06 14:50:58,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-06 14:50:58,645 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:50:58,645 INFO L499 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:50:58,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 14:50:58,845 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-04-06 14:50:58,846 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:50:58,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:50:58,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1751481511, now seen corresponding path program 13 times [2022-04-06 14:50:58,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:50:58,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1635062795] [2022-04-06 14:50:58,868 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:50:58,911 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:50:58,911 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:50:58,911 INFO L85 PathProgramCache]: Analyzing trace with hash 15962543, now seen corresponding path program 1 times [2022-04-06 14:50:58,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:50:58,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128361755] [2022-04-06 14:50:58,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:50:58,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:50:58,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:50:58,916 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:50:58,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:50:58,919 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:50:58,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1751481511, now seen corresponding path program 14 times [2022-04-06 14:50:58,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:50:58,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462646329] [2022-04-06 14:50:58,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:50:58,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:50:58,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:50:58,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:50:58,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:50:58,981 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:50:58,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:50:58,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462646329] [2022-04-06 14:50:58,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462646329] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:50:58,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875660358] [2022-04-06 14:50:58,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:50:58,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:50:58,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:50:58,982 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:50:58,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 14:50:59,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:50:59,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:50:59,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 14:50:59,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:50:59,055 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:50:59,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:50:59,174 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:50:59,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875660358] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:50:59,175 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:50:59,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-04-06 14:50:59,175 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:50:59,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1635062795] [2022-04-06 14:50:59,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1635062795] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:50:59,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:50:59,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 14:50:59,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538218927] [2022-04-06 14:50:59,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:50:59,176 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 14:50:59,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:50:59,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 14:50:59,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-04-06 14:50:59,176 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:50:59,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:50:59,251 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2022-04-06 14:50:59,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 14:50:59,251 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 [2022-04-06 14:50:59,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:50:59,252 INFO L225 Difference]: With dead ends: 40 [2022-04-06 14:50:59,252 INFO L226 Difference]: Without dead ends: 31 [2022-04-06 14:50:59,252 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-04-06 14:50:59,253 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 15 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:50:59,253 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 29 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:50:59,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-04-06 14:50:59,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-04-06 14:50:59,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:50:59,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2022-04-06 14:50:59,256 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 27 [2022-04-06 14:50:59,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:50:59,256 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2022-04-06 14:50:59,256 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) [2022-04-06 14:50:59,256 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2022-04-06 14:50:59,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 14:50:59,257 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:50:59,257 INFO L499 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:50:59,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 14:50:59,459 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:50:59,459 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:50:59,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:50:59,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1042616836, now seen corresponding path program 15 times [2022-04-06 14:50:59,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:50:59,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [136857680] [2022-04-06 14:50:59,482 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:50:59,537 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:50:59,538 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:50:59,538 INFO L85 PathProgramCache]: Analyzing trace with hash 2065494703, now seen corresponding path program 1 times [2022-04-06 14:50:59,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:50:59,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982281138] [2022-04-06 14:50:59,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:50:59,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:50:59,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:50:59,542 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:50:59,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:50:59,546 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:50:59,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1042616836, now seen corresponding path program 16 times [2022-04-06 14:50:59,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:50:59,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246722929] [2022-04-06 14:50:59,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:50:59,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:50:59,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:50:59,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:50:59,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:50:59,597 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:50:59,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:50:59,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246722929] [2022-04-06 14:50:59,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246722929] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:50:59,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924996049] [2022-04-06 14:50:59,598 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:50:59,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:50:59,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:50:59,604 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:50:59,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 14:50:59,657 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:50:59,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:50:59,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 14:50:59,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:50:59,709 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:50:59,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:50:59,821 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:50:59,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924996049] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:50:59,821 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:50:59,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 20 [2022-04-06 14:50:59,821 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:50:59,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [136857680] [2022-04-06 14:50:59,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [136857680] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:50:59,821 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:50:59,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 14:50:59,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026300588] [2022-04-06 14:50:59,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:50:59,822 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 14:50:59,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:50:59,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 14:50:59,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2022-04-06 14:50:59,823 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:50:59,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:50:59,902 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2022-04-06 14:50:59,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 14:50:59,902 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 [2022-04-06 14:50:59,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:50:59,902 INFO L225 Difference]: With dead ends: 42 [2022-04-06 14:50:59,902 INFO L226 Difference]: Without dead ends: 33 [2022-04-06 14:50:59,903 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=326, Invalid=430, Unknown=0, NotChecked=0, Total=756 [2022-04-06 14:50:59,903 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 16 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:50:59,903 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 29 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:50:59,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-04-06 14:50:59,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-04-06 14:50:59,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:50:59,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2022-04-06 14:50:59,907 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 29 [2022-04-06 14:50:59,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:50:59,907 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2022-04-06 14:50:59,907 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) [2022-04-06 14:50:59,907 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2022-04-06 14:50:59,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 14:50:59,907 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:50:59,907 INFO L499 BasicCegarLoop]: trace histogram [10, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:50:59,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 14:51:00,115 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-04-06 14:51:00,115 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:51:00,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:51:00,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1571503071, now seen corresponding path program 17 times [2022-04-06 14:51:00,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:00,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [885140936] [2022-04-06 14:51:00,136 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:00,174 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:00,175 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:51:00,175 INFO L85 PathProgramCache]: Analyzing trace with hash -179940433, now seen corresponding path program 1 times [2022-04-06 14:51:00,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:00,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545897616] [2022-04-06 14:51:00,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:00,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:00,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:00,184 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:51:00,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:00,187 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:51:00,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1571503071, now seen corresponding path program 18 times [2022-04-06 14:51:00,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:00,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720908767] [2022-04-06 14:51:00,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:00,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:00,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:00,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:51:00,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:00,254 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 27 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:00,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:51:00,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720908767] [2022-04-06 14:51:00,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720908767] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:51:00,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975058185] [2022-04-06 14:51:00,254 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:51:00,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:51:00,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:51:00,258 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:51:00,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 14:51:00,282 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 14:51:00,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:51:00,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 14:51:00,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:51:00,395 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-04-06 14:51:00,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:51:00,508 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-04-06 14:51:00,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975058185] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:51:00,508 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:51:00,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 22 [2022-04-06 14:51:00,508 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:51:00,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [885140936] [2022-04-06 14:51:00,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [885140936] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:51:00,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:51:00,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 14:51:00,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314801564] [2022-04-06 14:51:00,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:51:00,509 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 14:51:00,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:00,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 14:51:00,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-04-06 14:51:00,509 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:51:00,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:51:00,626 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2022-04-06 14:51:00,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 14:51:00,626 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 [2022-04-06 14:51:00,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:51:00,627 INFO L225 Difference]: With dead ends: 44 [2022-04-06 14:51:00,627 INFO L226 Difference]: Without dead ends: 35 [2022-04-06 14:51:00,627 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=205, Invalid=725, Unknown=0, NotChecked=0, Total=930 [2022-04-06 14:51:00,627 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 17 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:51:00,628 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 44 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:51:00,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-04-06 14:51:00,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-04-06 14:51:00,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 30 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:51:00,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2022-04-06 14:51:00,631 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 31 [2022-04-06 14:51:00,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:51:00,631 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2022-04-06 14:51:00,631 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) [2022-04-06 14:51:00,631 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2022-04-06 14:51:00,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 14:51:00,631 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:51:00,632 INFO L499 BasicCegarLoop]: trace histogram [11, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:51:00,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 14:51:00,832 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,SelfDestructingSolverStorable20,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:51:00,832 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:51:00,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:51:00,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1184865538, now seen corresponding path program 19 times [2022-04-06 14:51:00,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:00,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [514393969] [2022-04-06 14:51:00,866 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:00,892 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:00,893 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:51:00,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1869591727, now seen corresponding path program 1 times [2022-04-06 14:51:00,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:00,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515785192] [2022-04-06 14:51:00,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:00,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:00,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:00,896 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:51:00,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:00,899 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:51:00,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1184865538, now seen corresponding path program 20 times [2022-04-06 14:51:00,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:00,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535193795] [2022-04-06 14:51:00,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:00,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:00,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:00,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:51:00,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:00,970 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 30 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:00,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:51:00,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535193795] [2022-04-06 14:51:00,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535193795] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:51:00,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188429201] [2022-04-06 14:51:00,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:51:00,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:51:00,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:51:00,971 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:51:01,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 14:51:01,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:51:01,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:51:01,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 14:51:01,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:51:01,072 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 30 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:01,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:51:01,219 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 30 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:01,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188429201] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:51:01,219 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:51:01,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 24 [2022-04-06 14:51:01,219 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:51:01,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [514393969] [2022-04-06 14:51:01,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [514393969] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:51:01,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:51:01,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 14:51:01,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102636157] [2022-04-06 14:51:01,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:51:01,220 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 14:51:01,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:01,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 14:51:01,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-04-06 14:51:01,221 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:51:01,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:51:01,326 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2022-04-06 14:51:01,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 14:51:01,326 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 [2022-04-06 14:51:01,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:51:01,326 INFO L225 Difference]: With dead ends: 46 [2022-04-06 14:51:01,326 INFO L226 Difference]: Without dead ends: 37 [2022-04-06 14:51:01,327 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=486, Invalid=636, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 14:51:01,327 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 18 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:51:01,328 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 34 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:51:01,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-04-06 14:51:01,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-04-06 14:51:01,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:51:01,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2022-04-06 14:51:01,331 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 33 [2022-04-06 14:51:01,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:51:01,331 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2022-04-06 14:51:01,331 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) [2022-04-06 14:51:01,331 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2022-04-06 14:51:01,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-06 14:51:01,332 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:51:01,332 INFO L499 BasicCegarLoop]: trace histogram [12, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:51:01,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 14:51:01,546 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21,SelfDestructingSolverStorable22 [2022-04-06 14:51:01,546 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:51:01,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:51:01,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1006616219, now seen corresponding path program 21 times [2022-04-06 14:51:01,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:01,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [177024752] [2022-04-06 14:51:01,572 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:01,625 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:01,625 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:51:01,625 INFO L85 PathProgramCache]: Analyzing trace with hash -375843409, now seen corresponding path program 1 times [2022-04-06 14:51:01,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:01,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647741378] [2022-04-06 14:51:01,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:01,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:01,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:01,629 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:51:01,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:01,646 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:51:01,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1006616219, now seen corresponding path program 22 times [2022-04-06 14:51:01,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:01,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681600265] [2022-04-06 14:51:01,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:01,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:01,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:01,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:51:01,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:01,749 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 33 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:01,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:51:01,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681600265] [2022-04-06 14:51:01,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681600265] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:51:01,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263623931] [2022-04-06 14:51:01,750 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:51:01,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:51:01,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:51:01,751 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:51:01,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 14:51:01,776 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:51:01,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:51:01,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 14:51:01,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:51:01,830 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 33 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:01,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:51:02,020 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 33 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:02,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263623931] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:51:02,021 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:51:02,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-04-06 14:51:02,021 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:51:02,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [177024752] [2022-04-06 14:51:02,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [177024752] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:51:02,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:51:02,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 14:51:02,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844243392] [2022-04-06 14:51:02,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:51:02,021 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 14:51:02,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:02,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 14:51:02,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-04-06 14:51:02,022 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:51:02,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:51:02,134 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2022-04-06 14:51:02,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 14:51:02,134 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 [2022-04-06 14:51:02,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:51:02,134 INFO L225 Difference]: With dead ends: 48 [2022-04-06 14:51:02,134 INFO L226 Difference]: Without dead ends: 39 [2022-04-06 14:51:02,135 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=578, Invalid=754, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 14:51:02,135 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 19 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:51:02,136 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 24 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:51:02,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-04-06 14:51:02,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-04-06 14:51:02,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:51:02,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2022-04-06 14:51:02,139 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 35 [2022-04-06 14:51:02,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:51:02,139 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2022-04-06 14:51:02,139 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) [2022-04-06 14:51:02,139 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2022-04-06 14:51:02,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 14:51:02,140 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:51:02,140 INFO L499 BasicCegarLoop]: trace histogram [13, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:51:02,159 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-04-06 14:51:02,347 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23,SelfDestructingSolverStorable24 [2022-04-06 14:51:02,347 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:51:02,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:51:02,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1808357640, now seen corresponding path program 23 times [2022-04-06 14:51:02,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:02,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [368246374] [2022-04-06 14:51:02,367 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:02,416 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:02,416 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:51:02,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1673688751, now seen corresponding path program 1 times [2022-04-06 14:51:02,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:02,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123114745] [2022-04-06 14:51:02,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:02,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:02,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:02,420 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:51:02,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:02,423 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:51:02,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1808357640, now seen corresponding path program 24 times [2022-04-06 14:51:02,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:02,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273933173] [2022-04-06 14:51:02,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:02,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:02,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:02,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:51:02,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:02,514 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 36 proven. 132 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:02,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:51:02,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273933173] [2022-04-06 14:51:02,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273933173] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:51:02,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147760727] [2022-04-06 14:51:02,514 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:51:02,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:51:02,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:51:02,515 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:51:02,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 14:51:02,555 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 14:51:02,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:51:02,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 14:51:02,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:51:02,688 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-04-06 14:51:02,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:51:02,807 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-04-06 14:51:02,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147760727] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:51:02,807 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:51:02,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 8] total 25 [2022-04-06 14:51:02,808 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:51:02,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [368246374] [2022-04-06 14:51:02,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [368246374] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:51:02,808 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:51:02,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 14:51:02,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515471263] [2022-04-06 14:51:02,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:51:02,808 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 14:51:02,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:02,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 14:51:02,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2022-04-06 14:51:02,809 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:51:02,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:51:02,965 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2022-04-06 14:51:02,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 14:51:02,965 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 [2022-04-06 14:51:02,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:51:02,966 INFO L225 Difference]: With dead ends: 50 [2022-04-06 14:51:02,966 INFO L226 Difference]: Without dead ends: 41 [2022-04-06 14:51:02,966 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=313, Invalid=1019, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 14:51:02,967 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 20 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:51:02,967 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 24 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:51:02,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-04-06 14:51:02,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-04-06 14:51:02,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 36 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:51:02,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2022-04-06 14:51:02,971 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 37 [2022-04-06 14:51:02,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:51:02,971 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2022-04-06 14:51:02,971 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) [2022-04-06 14:51:02,971 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2022-04-06 14:51:02,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 14:51:02,973 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:51:02,973 INFO L499 BasicCegarLoop]: trace histogram [14, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:51:02,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 14:51:03,175 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25,SelfDestructingSolverStorable26 [2022-04-06 14:51:03,176 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:51:03,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:51:03,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1168839659, now seen corresponding path program 25 times [2022-04-06 14:51:03,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:03,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1299463261] [2022-04-06 14:51:03,201 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:03,247 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:03,247 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:51:03,247 INFO L85 PathProgramCache]: Analyzing trace with hash -571746385, now seen corresponding path program 1 times [2022-04-06 14:51:03,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:03,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924318264] [2022-04-06 14:51:03,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:03,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:03,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:03,251 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:51:03,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:03,254 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:51:03,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1168839659, now seen corresponding path program 26 times [2022-04-06 14:51:03,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:03,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245693440] [2022-04-06 14:51:03,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:03,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:03,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:03,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:51:03,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:03,358 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 39 proven. 156 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:03,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:51:03,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245693440] [2022-04-06 14:51:03,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245693440] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:51:03,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400916090] [2022-04-06 14:51:03,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:51:03,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:51:03,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:51:03,359 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:51:03,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 14:51:03,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:51:03,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:51:03,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 14:51:03,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:51:03,448 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 39 proven. 156 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:03,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:51:03,684 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 39 proven. 156 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:03,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400916090] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:51:03,684 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:51:03,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 30 [2022-04-06 14:51:03,684 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:51:03,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1299463261] [2022-04-06 14:51:03,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1299463261] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:51:03,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:51:03,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 14:51:03,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132255128] [2022-04-06 14:51:03,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:51:03,685 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 14:51:03,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:03,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 14:51:03,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2022-04-06 14:51:03,686 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:51:03,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:51:03,821 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2022-04-06 14:51:03,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 14:51:03,821 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 [2022-04-06 14:51:03,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:51:03,822 INFO L225 Difference]: With dead ends: 52 [2022-04-06 14:51:03,822 INFO L226 Difference]: Without dead ends: 43 [2022-04-06 14:51:03,823 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=786, Invalid=1020, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 14:51:03,823 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 21 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:51:03,823 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 24 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:51:03,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-04-06 14:51:03,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-04-06 14:51:03,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:51:03,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2022-04-06 14:51:03,828 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 39 [2022-04-06 14:51:03,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:51:03,828 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2022-04-06 14:51:03,828 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) [2022-04-06 14:51:03,828 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2022-04-06 14:51:03,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 14:51:03,829 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:51:03,829 INFO L499 BasicCegarLoop]: trace histogram [15, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:51:03,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-06 14:51:04,038 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27,SelfDestructingSolverStorable28 [2022-04-06 14:51:04,039 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:51:04,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:51:04,039 INFO L85 PathProgramCache]: Analyzing trace with hash -772383246, now seen corresponding path program 27 times [2022-04-06 14:51:04,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:04,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [153751821] [2022-04-06 14:51:04,063 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:04,102 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:04,102 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:51:04,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1477785775, now seen corresponding path program 1 times [2022-04-06 14:51:04,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:04,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80290322] [2022-04-06 14:51:04,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:04,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:04,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:04,106 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:51:04,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:04,109 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:51:04,109 INFO L85 PathProgramCache]: Analyzing trace with hash -772383246, now seen corresponding path program 28 times [2022-04-06 14:51:04,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:04,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491007704] [2022-04-06 14:51:04,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:04,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:04,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:04,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:51:04,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:04,216 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 42 proven. 182 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:04,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:51:04,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491007704] [2022-04-06 14:51:04,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491007704] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:51:04,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938566713] [2022-04-06 14:51:04,217 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:51:04,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:51:04,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:51:04,232 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:51:04,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 14:51:04,264 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:51:04,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:51:04,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 14:51:04,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:51:04,325 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 42 proven. 182 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:04,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:51:04,602 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 42 proven. 182 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:04,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938566713] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:51:04,603 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:51:04,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 32 [2022-04-06 14:51:04,603 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:51:04,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [153751821] [2022-04-06 14:51:04,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [153751821] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:51:04,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:51:04,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 14:51:04,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539241267] [2022-04-06 14:51:04,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:51:04,604 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 14:51:04,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:04,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 14:51:04,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-04-06 14:51:04,605 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:51:04,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:51:04,758 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2022-04-06 14:51:04,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 14:51:04,758 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 [2022-04-06 14:51:04,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:51:04,759 INFO L225 Difference]: With dead ends: 54 [2022-04-06 14:51:04,759 INFO L226 Difference]: Without dead ends: 45 [2022-04-06 14:51:04,760 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=902, Invalid=1168, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 14:51:04,760 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 22 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:51:04,760 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 19 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:51:04,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-04-06 14:51:04,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-04-06 14:51:04,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.1) internal successors, (44), 40 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:51:04,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2022-04-06 14:51:04,764 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 41 [2022-04-06 14:51:04,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:51:04,764 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2022-04-06 14:51:04,765 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) [2022-04-06 14:51:04,765 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2022-04-06 14:51:04,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 14:51:04,765 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:51:04,765 INFO L499 BasicCegarLoop]: trace histogram [16, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:51:04,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-06 14:51:04,975 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,SelfDestructingSolverStorable30,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:51:04,975 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:51:04,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:51:04,976 INFO L85 PathProgramCache]: Analyzing trace with hash -2029859697, now seen corresponding path program 29 times [2022-04-06 14:51:04,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:04,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [5399907] [2022-04-06 14:51:05,001 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:05,040 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:05,040 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:51:05,040 INFO L85 PathProgramCache]: Analyzing trace with hash -767649361, now seen corresponding path program 1 times [2022-04-06 14:51:05,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:05,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140298354] [2022-04-06 14:51:05,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:05,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:05,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:05,044 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:51:05,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:05,046 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:51:05,046 INFO L85 PathProgramCache]: Analyzing trace with hash -2029859697, now seen corresponding path program 30 times [2022-04-06 14:51:05,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:05,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300570008] [2022-04-06 14:51:05,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:05,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:05,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:05,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:51:05,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:05,188 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 45 proven. 210 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:05,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:51:05,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300570008] [2022-04-06 14:51:05,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300570008] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:51:05,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254205224] [2022-04-06 14:51:05,189 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:51:05,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:51:05,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:51:05,190 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) [2022-04-06 14:51:05,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-06 14:51:05,214 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 14:51:05,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:51:05,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 14:51:05,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:51:05,349 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-04-06 14:51:05,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:51:05,467 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-04-06 14:51:05,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254205224] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:51:05,467 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:51:05,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8, 8] total 28 [2022-04-06 14:51:05,467 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:51:05,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [5399907] [2022-04-06 14:51:05,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [5399907] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:51:05,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:51:05,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 14:51:05,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910139212] [2022-04-06 14:51:05,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:51:05,468 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 14:51:05,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:05,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 14:51:05,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=578, Unknown=0, NotChecked=0, Total=756 [2022-04-06 14:51:05,469 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:51:05,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:51:05,670 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2022-04-06 14:51:05,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 14:51:05,670 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 [2022-04-06 14:51:05,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:51:05,670 INFO L225 Difference]: With dead ends: 56 [2022-04-06 14:51:05,670 INFO L226 Difference]: Without dead ends: 47 [2022-04-06 14:51:05,671 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=448, Invalid=1358, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 14:51:05,671 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 23 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:51:05,672 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 49 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:51:05,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-04-06 14:51:05,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-04-06 14:51:05,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 42 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:51:05,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2022-04-06 14:51:05,675 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 43 [2022-04-06 14:51:05,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:51:05,675 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2022-04-06 14:51:05,675 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) [2022-04-06 14:51:05,676 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2022-04-06 14:51:05,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 14:51:05,676 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:51:05,676 INFO L499 BasicCegarLoop]: trace histogram [17, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:51:05,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-06 14:51:05,876 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,SelfDestructingSolverStorable32,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:51:05,876 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:51:05,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:51:05,877 INFO L85 PathProgramCache]: Analyzing trace with hash 716048364, now seen corresponding path program 31 times [2022-04-06 14:51:05,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:05,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [711048602] [2022-04-06 14:51:05,899 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:05,943 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:05,943 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:51:05,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1281882799, now seen corresponding path program 1 times [2022-04-06 14:51:05,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:05,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956333369] [2022-04-06 14:51:05,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:05,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:05,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:05,961 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:51:05,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:05,964 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:51:05,964 INFO L85 PathProgramCache]: Analyzing trace with hash 716048364, now seen corresponding path program 32 times [2022-04-06 14:51:05,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:05,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584094433] [2022-04-06 14:51:05,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:05,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:05,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:06,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:51:06,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:06,093 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 48 proven. 240 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:06,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:51:06,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584094433] [2022-04-06 14:51:06,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584094433] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:51:06,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448476923] [2022-04-06 14:51:06,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:51:06,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:51:06,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:51:06,095 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) [2022-04-06 14:51:06,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-06 14:51:06,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:51:06,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:51:06,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 14:51:06,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:51:06,176 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 48 proven. 240 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:06,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:51:06,484 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 48 proven. 240 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:06,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448476923] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:51:06,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:51:06,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-04-06 14:51:06,485 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:51:06,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [711048602] [2022-04-06 14:51:06,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [711048602] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:51:06,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:51:06,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 14:51:06,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304807684] [2022-04-06 14:51:06,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:51:06,485 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 14:51:06,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:06,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 14:51:06,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 14:51:06,486 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:51:06,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:51:06,650 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2022-04-06 14:51:06,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 14:51:06,650 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 [2022-04-06 14:51:06,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:51:06,656 INFO L225 Difference]: With dead ends: 58 [2022-04-06 14:51:06,656 INFO L226 Difference]: Without dead ends: 49 [2022-04-06 14:51:06,657 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1158, Invalid=1494, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 14:51:06,658 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 24 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:51:06,658 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 24 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:51:06,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-04-06 14:51:06,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-04-06 14:51:06,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 44 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:51:06,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2022-04-06 14:51:06,672 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 45 [2022-04-06 14:51:06,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:51:06,672 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2022-04-06 14:51:06,672 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) [2022-04-06 14:51:06,672 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2022-04-06 14:51:06,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 14:51:06,673 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:51:06,673 INFO L499 BasicCegarLoop]: trace histogram [18, 16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:51:06,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-06 14:51:06,890 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33,SelfDestructingSolverStorable34 [2022-04-06 14:51:06,891 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:51:06,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:51:06,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1871192055, now seen corresponding path program 33 times [2022-04-06 14:51:06,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:06,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1985873212] [2022-04-06 14:51:06,924 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:06,966 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:06,966 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:51:06,966 INFO L85 PathProgramCache]: Analyzing trace with hash -963552337, now seen corresponding path program 1 times [2022-04-06 14:51:06,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:06,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676439215] [2022-04-06 14:51:06,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:06,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:06,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:06,970 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:51:06,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:06,973 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:51:06,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1871192055, now seen corresponding path program 34 times [2022-04-06 14:51:06,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:06,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727913285] [2022-04-06 14:51:06,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:06,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:06,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:07,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:51:07,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:07,096 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 51 proven. 272 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:07,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:51:07,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727913285] [2022-04-06 14:51:07,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727913285] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:51:07,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521563760] [2022-04-06 14:51:07,097 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:51:07,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:51:07,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:51:07,098 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) [2022-04-06 14:51:07,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-06 14:51:07,125 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:51:07,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:51:07,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 14:51:07,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:51:07,189 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 51 proven. 272 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:07,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:51:07,503 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 51 proven. 272 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:07,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521563760] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:51:07,503 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:51:07,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 38 [2022-04-06 14:51:07,503 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:51:07,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1985873212] [2022-04-06 14:51:07,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1985873212] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:51:07,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:51:07,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 14:51:07,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623022993] [2022-04-06 14:51:07,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:51:07,504 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 14:51:07,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:07,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 14:51:07,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 14:51:07,505 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:51:07,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:51:07,731 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2022-04-06 14:51:07,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 14:51:07,731 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 [2022-04-06 14:51:07,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:51:07,732 INFO L225 Difference]: With dead ends: 60 [2022-04-06 14:51:07,732 INFO L226 Difference]: Without dead ends: 51 [2022-04-06 14:51:07,733 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1298, Invalid=1672, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 14:51:07,733 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 25 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:51:07,733 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 44 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:51:07,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-04-06 14:51:07,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-04-06 14:51:07,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 46 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:51:07,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2022-04-06 14:51:07,737 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 47 [2022-04-06 14:51:07,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:51:07,737 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2022-04-06 14:51:07,737 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) [2022-04-06 14:51:07,737 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2022-04-06 14:51:07,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 14:51:07,737 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:51:07,737 INFO L499 BasicCegarLoop]: trace histogram [19, 17, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:51:07,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-06 14:51:07,947 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-04-06 14:51:07,948 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:51:07,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:51:07,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1423170330, now seen corresponding path program 35 times [2022-04-06 14:51:07,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:07,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1152581821] [2022-04-06 14:51:07,972 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:08,016 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:08,017 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:51:08,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1085979823, now seen corresponding path program 1 times [2022-04-06 14:51:08,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:08,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697690674] [2022-04-06 14:51:08,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:08,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:08,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:08,020 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:51:08,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:08,022 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:51:08,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1423170330, now seen corresponding path program 36 times [2022-04-06 14:51:08,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:08,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898287547] [2022-04-06 14:51:08,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:08,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:08,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:08,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:51:08,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:08,175 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 54 proven. 306 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:08,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:51:08,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898287547] [2022-04-06 14:51:08,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898287547] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:51:08,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673029164] [2022-04-06 14:51:08,175 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:51:08,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:51:08,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:51:08,176 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) [2022-04-06 14:51:08,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-04-06 14:51:08,223 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 14:51:08,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:51:08,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 14:51:08,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:51:08,350 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2022-04-06 14:51:08,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:51:08,488 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2022-04-06 14:51:08,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673029164] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:51:08,489 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:51:08,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 8, 8] total 31 [2022-04-06 14:51:08,489 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:51:08,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1152581821] [2022-04-06 14:51:08,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1152581821] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:51:08,489 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:51:08,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 14:51:08,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610522344] [2022-04-06 14:51:08,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:51:08,491 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 14:51:08,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:08,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 14:51:08,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=698, Unknown=0, NotChecked=0, Total=930 [2022-04-06 14:51:08,492 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:51:08,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:51:08,743 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2022-04-06 14:51:08,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 14:51:08,743 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 [2022-04-06 14:51:08,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:51:08,744 INFO L225 Difference]: With dead ends: 62 [2022-04-06 14:51:08,744 INFO L226 Difference]: Without dead ends: 53 [2022-04-06 14:51:08,745 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=610, Invalid=1742, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 14:51:08,745 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 26 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:51:08,745 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 29 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:51:08,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-04-06 14:51:08,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-04-06 14:51:08,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 48 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:51:08,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2022-04-06 14:51:08,749 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 49 [2022-04-06 14:51:08,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:51:08,749 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2022-04-06 14:51:08,749 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) [2022-04-06 14:51:08,749 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2022-04-06 14:51:08,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 14:51:08,749 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:51:08,749 INFO L499 BasicCegarLoop]: trace histogram [20, 18, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:51:08,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-04-06 14:51:08,959 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37,SelfDestructingSolverStorable38 [2022-04-06 14:51:08,959 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:51:08,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:51:08,960 INFO L85 PathProgramCache]: Analyzing trace with hash -371022205, now seen corresponding path program 37 times [2022-04-06 14:51:08,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:08,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [183223146] [2022-04-06 14:51:08,982 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:09,017 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:09,017 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:51:09,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1159455313, now seen corresponding path program 1 times [2022-04-06 14:51:09,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:09,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449898803] [2022-04-06 14:51:09,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:09,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:09,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:09,021 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:51:09,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:09,028 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:51:09,028 INFO L85 PathProgramCache]: Analyzing trace with hash -371022205, now seen corresponding path program 38 times [2022-04-06 14:51:09,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:09,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909338920] [2022-04-06 14:51:09,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:09,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:09,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:09,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:51:09,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:09,204 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 57 proven. 342 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:09,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:51:09,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909338920] [2022-04-06 14:51:09,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909338920] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:51:09,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826813270] [2022-04-06 14:51:09,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:51:09,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:51:09,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:51:09,206 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) [2022-04-06 14:51:09,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-04-06 14:51:09,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:51:09,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:51:09,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-06 14:51:09,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:51:09,324 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 57 proven. 342 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:09,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:51:09,783 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 57 proven. 342 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:09,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826813270] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:51:09,784 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:51:09,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 42 [2022-04-06 14:51:09,784 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:51:09,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [183223146] [2022-04-06 14:51:09,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [183223146] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:51:09,784 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:51:09,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 14:51:09,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600449443] [2022-04-06 14:51:09,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:51:09,785 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 14:51:09,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:09,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 14:51:09,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 14:51:09,786 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 21 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:51:10,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:51:10,016 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2022-04-06 14:51:10,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 14:51:10,018 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 [2022-04-06 14:51:10,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:51:10,018 INFO L225 Difference]: With dead ends: 64 [2022-04-06 14:51:10,018 INFO L226 Difference]: Without dead ends: 55 [2022-04-06 14:51:10,019 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1602, Invalid=2058, Unknown=0, NotChecked=0, Total=3660 [2022-04-06 14:51:10,020 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 27 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:51:10,020 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 24 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:51:10,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-04-06 14:51:10,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-04-06 14:51:10,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.08) internal successors, (54), 50 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:51:10,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2022-04-06 14:51:10,023 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 51 [2022-04-06 14:51:10,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:51:10,023 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2022-04-06 14:51:10,023 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) [2022-04-06 14:51:10,023 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2022-04-06 14:51:10,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 14:51:10,024 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:51:10,024 INFO L499 BasicCegarLoop]: trace histogram [21, 19, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:51:10,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-04-06 14:51:10,224 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-04-06 14:51:10,224 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:51:10,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:51:10,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1426011360, now seen corresponding path program 39 times [2022-04-06 14:51:10,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:10,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [839289554] [2022-04-06 14:51:10,242 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:10,291 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:10,291 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:51:10,291 INFO L85 PathProgramCache]: Analyzing trace with hash 890076847, now seen corresponding path program 1 times [2022-04-06 14:51:10,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:10,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492687961] [2022-04-06 14:51:10,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:10,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:10,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:10,295 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:51:10,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:10,303 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:51:10,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1426011360, now seen corresponding path program 40 times [2022-04-06 14:51:10,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:10,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331582012] [2022-04-06 14:51:10,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:10,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:10,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:10,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:51:10,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:10,496 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 60 proven. 380 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:10,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:51:10,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331582012] [2022-04-06 14:51:10,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331582012] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:51:10,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107590024] [2022-04-06 14:51:10,496 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:51:10,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:51:10,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:51:10,512 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) [2022-04-06 14:51:10,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-04-06 14:51:10,539 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:51:10,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:51:10,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 14:51:10,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:51:10,621 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 60 proven. 380 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:10,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:51:11,069 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 60 proven. 380 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:11,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107590024] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:51:11,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:51:11,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 44 [2022-04-06 14:51:11,070 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:51:11,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [839289554] [2022-04-06 14:51:11,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [839289554] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:51:11,070 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:51:11,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 14:51:11,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900924935] [2022-04-06 14:51:11,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:51:11,071 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 14:51:11,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:11,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 14:51:11,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 14:51:11,072 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:51:11,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:51:11,247 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2022-04-06 14:51:11,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 14:51:11,248 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 [2022-04-06 14:51:11,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:51:11,248 INFO L225 Difference]: With dead ends: 66 [2022-04-06 14:51:11,248 INFO L226 Difference]: Without dead ends: 57 [2022-04-06 14:51:11,249 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1766, Invalid=2266, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 14:51:11,250 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 28 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:51:11,250 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 39 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:51:11,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-04-06 14:51:11,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-04-06 14:51:11,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 52 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:51:11,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2022-04-06 14:51:11,253 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 53 [2022-04-06 14:51:11,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:51:11,253 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2022-04-06 14:51:11,253 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) [2022-04-06 14:51:11,253 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2022-04-06 14:51:11,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 14:51:11,254 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:51:11,254 INFO L499 BasicCegarLoop]: trace histogram [22, 20, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:51:11,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-04-06 14:51:11,454 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41,SelfDestructingSolverStorable42 [2022-04-06 14:51:11,454 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:51:11,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:51:11,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1798414333, now seen corresponding path program 41 times [2022-04-06 14:51:11,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:11,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [881863024] [2022-04-06 14:51:11,480 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:11,526 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:11,526 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:51:11,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1355358289, now seen corresponding path program 1 times [2022-04-06 14:51:11,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:11,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344047945] [2022-04-06 14:51:11,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:11,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:11,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:11,530 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:51:11,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:11,533 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:51:11,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1798414333, now seen corresponding path program 42 times [2022-04-06 14:51:11,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:11,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724945991] [2022-04-06 14:51:11,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:11,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:11,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:11,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:51:11,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:11,728 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 63 proven. 420 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:11,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:51:11,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724945991] [2022-04-06 14:51:11,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724945991] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:51:11,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735419217] [2022-04-06 14:51:11,729 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:51:11,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:51:11,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:51:11,730 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) [2022-04-06 14:51:11,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-04-06 14:51:11,761 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 14:51:11,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:51:11,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 14:51:11,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:51:11,905 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 14:51:11,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:51:12,040 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 14:51:12,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735419217] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:51:12,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:51:12,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 8, 8] total 34 [2022-04-06 14:51:12,040 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:51:12,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [881863024] [2022-04-06 14:51:12,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [881863024] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:51:12,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:51:12,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 14:51:12,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144956669] [2022-04-06 14:51:12,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:51:12,041 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 14:51:12,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:12,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 14:51:12,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=827, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 14:51:12,042 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:51:12,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:51:12,352 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2022-04-06 14:51:12,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 14:51:12,352 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 [2022-04-06 14:51:12,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:51:12,352 INFO L225 Difference]: With dead ends: 68 [2022-04-06 14:51:12,353 INFO L226 Difference]: Without dead ends: 59 [2022-04-06 14:51:12,353 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=799, Invalid=2171, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 14:51:12,354 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 29 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:51:12,354 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 29 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:51:12,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-04-06 14:51:12,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-04-06 14:51:12,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:51:12,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2022-04-06 14:51:12,357 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 55 [2022-04-06 14:51:12,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:51:12,357 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2022-04-06 14:51:12,357 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) [2022-04-06 14:51:12,358 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2022-04-06 14:51:12,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-06 14:51:12,358 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:51:12,358 INFO L499 BasicCegarLoop]: trace histogram [23, 21, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:51:12,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-04-06 14:51:12,567 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43,SelfDestructingSolverStorable44 [2022-04-06 14:51:12,567 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:51:12,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:51:12,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1099581478, now seen corresponding path program 43 times [2022-04-06 14:51:12,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:12,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1011243109] [2022-04-06 14:51:12,585 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:12,619 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:12,620 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:51:12,620 INFO L85 PathProgramCache]: Analyzing trace with hash 694173871, now seen corresponding path program 1 times [2022-04-06 14:51:12,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:12,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270978605] [2022-04-06 14:51:12,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:12,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:12,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:12,623 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:51:12,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:12,629 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:51:12,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1099581478, now seen corresponding path program 44 times [2022-04-06 14:51:12,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:12,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051456059] [2022-04-06 14:51:12,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:12,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:12,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:12,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:51:12,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:12,834 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 66 proven. 462 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:12,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:51:12,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051456059] [2022-04-06 14:51:12,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051456059] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:51:12,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261879295] [2022-04-06 14:51:12,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:51:12,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:51:12,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:51:12,839 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) [2022-04-06 14:51:12,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-04-06 14:51:12,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:51:12,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:51:12,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 14:51:12,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:51:12,957 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 66 proven. 462 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:12,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:51:13,487 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 66 proven. 462 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:13,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261879295] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:51:13,488 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:51:13,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 48 [2022-04-06 14:51:13,488 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:51:13,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1011243109] [2022-04-06 14:51:13,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1011243109] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:51:13,489 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:51:13,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 14:51:13,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374007596] [2022-04-06 14:51:13,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:51:13,490 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 14:51:13,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:13,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 14:51:13,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 14:51:13,492 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:51:13,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:51:13,782 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2022-04-06 14:51:13,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 14:51:13,783 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 [2022-04-06 14:51:13,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:51:13,783 INFO L225 Difference]: With dead ends: 70 [2022-04-06 14:51:13,783 INFO L226 Difference]: Without dead ends: 61 [2022-04-06 14:51:13,785 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2118, Invalid=2712, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 14:51:13,785 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 30 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:51:13,785 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 29 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:51:13,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-04-06 14:51:13,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-04-06 14:51:13,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 56 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:51:13,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2022-04-06 14:51:13,788 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 57 [2022-04-06 14:51:13,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:51:13,789 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2022-04-06 14:51:13,789 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) [2022-04-06 14:51:13,789 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2022-04-06 14:51:13,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 14:51:13,789 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:51:13,789 INFO L499 BasicCegarLoop]: trace histogram [24, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:51:13,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-04-06 14:51:14,001 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,SelfDestructingSolverStorable46,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:51:14,001 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:51:14,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:51:14,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1360219255, now seen corresponding path program 45 times [2022-04-06 14:51:14,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:14,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [806789715] [2022-04-06 14:51:14,019 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:14,055 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:14,055 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:51:14,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1551261265, now seen corresponding path program 1 times [2022-04-06 14:51:14,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:14,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422196245] [2022-04-06 14:51:14,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:14,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:14,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:14,059 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:51:14,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:14,061 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:51:14,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1360219255, now seen corresponding path program 46 times [2022-04-06 14:51:14,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:14,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624508391] [2022-04-06 14:51:14,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:14,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:14,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:14,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:51:14,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:14,283 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 69 proven. 506 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:14,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:51:14,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624508391] [2022-04-06 14:51:14,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624508391] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:51:14,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140487404] [2022-04-06 14:51:14,284 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:51:14,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:51:14,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:51:14,296 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) [2022-04-06 14:51:14,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-04-06 14:51:14,335 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:51:14,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:51:14,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 14:51:14,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:51:14,415 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 69 proven. 506 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:14,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:51:14,960 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 69 proven. 506 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:14,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140487404] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:51:14,960 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:51:14,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-04-06 14:51:14,960 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:51:14,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [806789715] [2022-04-06 14:51:14,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [806789715] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:51:14,960 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:51:14,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 14:51:14,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83089822] [2022-04-06 14:51:14,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:51:14,961 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 14:51:14,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:14,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 14:51:14,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 14:51:14,962 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:51:15,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:51:15,271 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2022-04-06 14:51:15,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 14:51:15,271 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 [2022-04-06 14:51:15,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:51:15,272 INFO L225 Difference]: With dead ends: 72 [2022-04-06 14:51:15,272 INFO L226 Difference]: Without dead ends: 63 [2022-04-06 14:51:15,273 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2306, Invalid=2950, Unknown=0, NotChecked=0, Total=5256 [2022-04-06 14:51:15,273 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 31 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:51:15,274 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 39 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:51:15,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-04-06 14:51:15,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-04-06 14:51:15,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 58 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:51:15,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2022-04-06 14:51:15,279 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 59 [2022-04-06 14:51:15,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:51:15,279 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2022-04-06 14:51:15,279 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) [2022-04-06 14:51:15,279 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2022-04-06 14:51:15,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 14:51:15,279 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:51:15,279 INFO L499 BasicCegarLoop]: trace histogram [25, 23, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:51:15,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-04-06 14:51:15,499 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,SelfDestructingSolverStorable48,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:51:15,499 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:51:15,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:51:15,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1298256428, now seen corresponding path program 47 times [2022-04-06 14:51:15,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:15,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1508206615] [2022-04-06 14:51:15,525 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:15,559 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:15,559 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:51:15,559 INFO L85 PathProgramCache]: Analyzing trace with hash 498270895, now seen corresponding path program 1 times [2022-04-06 14:51:15,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:15,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066766165] [2022-04-06 14:51:15,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:15,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:15,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:15,563 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:51:15,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:15,577 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:51:15,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1298256428, now seen corresponding path program 48 times [2022-04-06 14:51:15,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:15,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747764236] [2022-04-06 14:51:15,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:15,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:15,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:15,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:51:15,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:15,831 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 72 proven. 552 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:15,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:51:15,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747764236] [2022-04-06 14:51:15,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747764236] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:51:15,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545994404] [2022-04-06 14:51:15,831 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:51:15,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:51:15,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:51:15,837 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) [2022-04-06 14:51:15,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-04-06 14:51:15,866 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 14:51:15,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:51:15,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 14:51:15,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:51:16,035 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2022-04-06 14:51:16,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:51:16,168 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2022-04-06 14:51:16,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545994404] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:51:16,169 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:51:16,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 8, 8] total 37 [2022-04-06 14:51:16,169 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:51:16,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1508206615] [2022-04-06 14:51:16,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1508206615] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:51:16,169 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:51:16,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 14:51:16,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652730048] [2022-04-06 14:51:16,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:51:16,170 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 14:51:16,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:16,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 14:51:16,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=965, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 14:51:16,170 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:51:16,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:51:16,412 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2022-04-06 14:51:16,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 14:51:16,412 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 [2022-04-06 14:51:16,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:51:16,412 INFO L225 Difference]: With dead ends: 74 [2022-04-06 14:51:16,413 INFO L226 Difference]: Without dead ends: 65 [2022-04-06 14:51:16,413 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1015, Invalid=2645, Unknown=0, NotChecked=0, Total=3660 [2022-04-06 14:51:16,413 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 32 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:51:16,414 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 29 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:51:16,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-04-06 14:51:16,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-04-06 14:51:16,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 60 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:51:16,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2022-04-06 14:51:16,417 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 61 [2022-04-06 14:51:16,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:51:16,417 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2022-04-06 14:51:16,417 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) [2022-04-06 14:51:16,417 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2022-04-06 14:51:16,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-06 14:51:16,417 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:51:16,417 INFO L499 BasicCegarLoop]: trace histogram [26, 24, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:51:16,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-04-06 14:51:16,631 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-04-06 14:51:16,632 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:51:16,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:51:16,632 INFO L85 PathProgramCache]: Analyzing trace with hash -587846671, now seen corresponding path program 49 times [2022-04-06 14:51:16,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:16,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2062898314] [2022-04-06 14:51:16,646 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:16,676 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:16,676 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:51:16,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1747164241, now seen corresponding path program 1 times [2022-04-06 14:51:16,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:16,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060061722] [2022-04-06 14:51:16,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:16,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:16,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:16,680 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:51:16,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:16,688 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:51:16,688 INFO L85 PathProgramCache]: Analyzing trace with hash -587846671, now seen corresponding path program 50 times [2022-04-06 14:51:16,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:16,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821900552] [2022-04-06 14:51:16,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:16,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:16,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:16,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:51:16,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:16,895 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 75 proven. 600 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:16,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:51:16,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821900552] [2022-04-06 14:51:16,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821900552] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:51:16,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142808745] [2022-04-06 14:51:16,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:51:16,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:51:16,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:51:16,897 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) [2022-04-06 14:51:16,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-04-06 14:51:16,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:51:16,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:51:16,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 14:51:16,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:51:17,014 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 75 proven. 600 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:17,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:51:17,476 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 75 proven. 600 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:17,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142808745] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:51:17,476 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:51:17,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 54 [2022-04-06 14:51:17,476 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:51:17,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2062898314] [2022-04-06 14:51:17,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2062898314] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:51:17,477 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:51:17,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-04-06 14:51:17,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680192449] [2022-04-06 14:51:17,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:51:17,477 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 14:51:17,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:17,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 14:51:17,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 14:51:17,478 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:51:17,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:51:17,700 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2022-04-06 14:51:17,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 14:51:17,701 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 [2022-04-06 14:51:17,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:51:17,701 INFO L225 Difference]: With dead ends: 76 [2022-04-06 14:51:17,701 INFO L226 Difference]: Without dead ends: 67 [2022-04-06 14:51:17,702 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2706, Invalid=3456, Unknown=0, NotChecked=0, Total=6162 [2022-04-06 14:51:17,702 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 33 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:51:17,703 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 44 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:51:17,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-04-06 14:51:17,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-04-06 14:51:17,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.064516129032258) internal successors, (66), 62 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:51:17,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2022-04-06 14:51:17,706 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 63 [2022-04-06 14:51:17,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:51:17,706 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2022-04-06 14:51:17,706 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) [2022-04-06 14:51:17,706 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2022-04-06 14:51:17,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-06 14:51:17,707 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:51:17,707 INFO L499 BasicCegarLoop]: trace histogram [27, 25, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:51:17,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-04-06 14:51:17,909 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51,SelfDestructingSolverStorable52 [2022-04-06 14:51:17,910 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:51:17,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:51:17,910 INFO L85 PathProgramCache]: Analyzing trace with hash -783870258, now seen corresponding path program 51 times [2022-04-06 14:51:17,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:17,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2112770409] [2022-04-06 14:51:17,927 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:17,957 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:17,957 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:51:17,957 INFO L85 PathProgramCache]: Analyzing trace with hash 302367919, now seen corresponding path program 1 times [2022-04-06 14:51:17,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:17,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833169703] [2022-04-06 14:51:17,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:17,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:17,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:17,961 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:51:17,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:17,968 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:51:17,968 INFO L85 PathProgramCache]: Analyzing trace with hash -783870258, now seen corresponding path program 52 times [2022-04-06 14:51:17,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:17,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172839545] [2022-04-06 14:51:17,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:17,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:17,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:18,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:51:18,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:18,168 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 78 proven. 650 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:18,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:51:18,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172839545] [2022-04-06 14:51:18,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172839545] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:51:18,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189455866] [2022-04-06 14:51:18,169 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:51:18,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:51:18,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:51:18,170 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) [2022-04-06 14:51:18,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-04-06 14:51:18,199 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:51:18,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:51:18,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 14:51:18,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:51:18,273 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 78 proven. 650 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:18,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:51:18,818 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 78 proven. 650 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:18,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189455866] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:51:18,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:51:18,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 56 [2022-04-06 14:51:18,819 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:51:18,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2112770409] [2022-04-06 14:51:18,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2112770409] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:51:18,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:51:18,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 14:51:18,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604932758] [2022-04-06 14:51:18,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:51:18,820 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 14:51:18,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:18,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 14:51:18,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2022-04-06 14:51:18,822 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:51:19,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:51:19,095 INFO L93 Difference]: Finished difference Result 78 states and 84 transitions. [2022-04-06 14:51:19,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 14:51:19,095 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 [2022-04-06 14:51:19,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:51:19,095 INFO L225 Difference]: With dead ends: 78 [2022-04-06 14:51:19,095 INFO L226 Difference]: Without dead ends: 69 [2022-04-06 14:51:19,096 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2918, Invalid=3724, Unknown=0, NotChecked=0, Total=6642 [2022-04-06 14:51:19,096 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 34 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:51:19,096 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 24 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:51:19,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-04-06 14:51:19,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-04-06 14:51:19,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.0625) internal successors, (68), 64 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:51:19,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2022-04-06 14:51:19,101 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 65 [2022-04-06 14:51:19,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:51:19,101 INFO L478 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2022-04-06 14:51:19,101 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) [2022-04-06 14:51:19,101 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2022-04-06 14:51:19,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-06 14:51:19,101 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:51:19,101 INFO L499 BasicCegarLoop]: trace histogram [28, 26, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:51:19,117 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-04-06 14:51:19,302 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53,SelfDestructingSolverStorable54 [2022-04-06 14:51:19,302 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:51:19,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:51:19,302 INFO L85 PathProgramCache]: Analyzing trace with hash -183976341, now seen corresponding path program 53 times [2022-04-06 14:51:19,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:19,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [983984389] [2022-04-06 14:51:19,319 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:19,366 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:19,366 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:51:19,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1943067217, now seen corresponding path program 1 times [2022-04-06 14:51:19,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:19,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506731273] [2022-04-06 14:51:19,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:19,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:19,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:19,370 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:51:19,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:19,372 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:51:19,372 INFO L85 PathProgramCache]: Analyzing trace with hash -183976341, now seen corresponding path program 54 times [2022-04-06 14:51:19,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:19,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759886269] [2022-04-06 14:51:19,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:19,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:19,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:19,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:51:19,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:19,656 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 81 proven. 702 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:19,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:51:19,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759886269] [2022-04-06 14:51:19,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759886269] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:51:19,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063169987] [2022-04-06 14:51:19,657 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:51:19,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:51:19,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:51:19,668 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) [2022-04-06 14:51:19,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-04-06 14:51:19,693 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 14:51:19,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:51:19,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 14:51:19,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:51:19,883 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2022-04-06 14:51:19,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:51:20,037 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2022-04-06 14:51:20,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063169987] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:51:20,037 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:51:20,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 8, 8] total 40 [2022-04-06 14:51:20,037 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:51:20,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [983984389] [2022-04-06 14:51:20,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [983984389] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:51:20,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:51:20,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-04-06 14:51:20,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234289060] [2022-04-06 14:51:20,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:51:20,038 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-06 14:51:20,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:20,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-06 14:51:20,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=448, Invalid=1112, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 14:51:20,039 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand has 30 states, 30 states have (on average 2.1) internal successors, (63), 29 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:51:20,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:51:20,358 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2022-04-06 14:51:20,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 14:51:20,358 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 [2022-04-06 14:51:20,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:51:20,359 INFO L225 Difference]: With dead ends: 80 [2022-04-06 14:51:20,359 INFO L226 Difference]: Without dead ends: 71 [2022-04-06 14:51:20,360 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1258, Invalid=3164, Unknown=0, NotChecked=0, Total=4422 [2022-04-06 14:51:20,360 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 35 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:51:20,360 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 39 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:51:20,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-04-06 14:51:20,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-04-06 14:51:20,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 66 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:51:20,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2022-04-06 14:51:20,364 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 67 [2022-04-06 14:51:20,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:51:20,364 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2022-04-06 14:51:20,364 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) [2022-04-06 14:51:20,364 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2022-04-06 14:51:20,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 14:51:20,364 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:51:20,364 INFO L499 BasicCegarLoop]: trace histogram [29, 27, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:51:20,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-04-06 14:51:20,579 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-04-06 14:51:20,580 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:51:20,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:51:20,580 INFO L85 PathProgramCache]: Analyzing trace with hash 788460232, now seen corresponding path program 55 times [2022-04-06 14:51:20,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:20,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [408772243] [2022-04-06 14:51:20,609 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:20,631 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:20,631 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:51:20,631 INFO L85 PathProgramCache]: Analyzing trace with hash 106464943, now seen corresponding path program 1 times [2022-04-06 14:51:20,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:20,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474376104] [2022-04-06 14:51:20,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:20,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:20,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:20,635 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:51:20,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:20,637 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:51:20,637 INFO L85 PathProgramCache]: Analyzing trace with hash 788460232, now seen corresponding path program 56 times [2022-04-06 14:51:20,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:20,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125423122] [2022-04-06 14:51:20,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:20,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:20,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:20,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:51:20,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:20,921 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 84 proven. 756 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:20,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:51:20,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125423122] [2022-04-06 14:51:20,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125423122] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:51:20,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913967121] [2022-04-06 14:51:20,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:51:20,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:51:20,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:51:20,923 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) [2022-04-06 14:51:20,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-04-06 14:51:20,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:51:20,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:51:20,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 29 conjunts are in the unsatisfiable core [2022-04-06 14:51:20,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:51:21,134 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 84 proven. 756 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:21,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:51:21,790 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 84 proven. 756 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:21,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913967121] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:51:21,791 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:51:21,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 60 [2022-04-06 14:51:21,791 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:51:21,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [408772243] [2022-04-06 14:51:21,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [408772243] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:51:21,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:51:21,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 14:51:21,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11449895] [2022-04-06 14:51:21,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:51:21,792 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 14:51:21,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:21,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 14:51:21,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 14:51:21,793 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:51:22,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:51:22,235 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2022-04-06 14:51:22,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-06 14:51:22,235 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 [2022-04-06 14:51:22,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:51:22,236 INFO L225 Difference]: With dead ends: 82 [2022-04-06 14:51:22,236 INFO L226 Difference]: Without dead ends: 73 [2022-04-06 14:51:22,237 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3366, Invalid=4290, Unknown=0, NotChecked=0, Total=7656 [2022-04-06 14:51:22,237 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 36 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:51:22,238 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 39 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:51:22,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-04-06 14:51:22,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-04-06 14:51:22,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 68 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:51:22,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2022-04-06 14:51:22,244 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 69 [2022-04-06 14:51:22,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:51:22,244 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2022-04-06 14:51:22,244 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) [2022-04-06 14:51:22,244 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2022-04-06 14:51:22,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-04-06 14:51:22,244 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:51:22,244 INFO L499 BasicCegarLoop]: trace histogram [30, 28, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:51:22,260 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-04-06 14:51:22,459 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,SelfDestructingSolverStorable58,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:51:22,459 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:51:22,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:51:22,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1002863643, now seen corresponding path program 57 times [2022-04-06 14:51:22,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:22,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [719159444] [2022-04-06 14:51:22,487 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:22,521 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:22,521 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:51:22,522 INFO L85 PathProgramCache]: Analyzing trace with hash -2138970193, now seen corresponding path program 1 times [2022-04-06 14:51:22,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:22,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342618052] [2022-04-06 14:51:22,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:22,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:22,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:22,525 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:51:22,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:22,529 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:51:22,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1002863643, now seen corresponding path program 58 times [2022-04-06 14:51:22,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:22,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550206031] [2022-04-06 14:51:22,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:22,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:22,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:22,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:51:22,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:22,857 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 87 proven. 812 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:22,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:51:22,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550206031] [2022-04-06 14:51:22,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550206031] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:51:22,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663733125] [2022-04-06 14:51:22,858 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:51:22,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:51:22,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:51:22,859 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) [2022-04-06 14:51:22,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-04-06 14:51:22,899 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:51:22,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:51:22,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-06 14:51:22,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:51:22,980 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 87 proven. 812 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:22,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:51:23,630 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 87 proven. 812 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:23,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663733125] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:51:23,631 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:51:23,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 62 [2022-04-06 14:51:23,631 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:51:23,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [719159444] [2022-04-06 14:51:23,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [719159444] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:51:23,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:51:23,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-04-06 14:51:23,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877486780] [2022-04-06 14:51:23,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:51:23,632 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-06 14:51:23,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:23,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-06 14:51:23,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2022-04-06 14:51:23,633 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:51:23,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:51:23,926 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2022-04-06 14:51:23,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 14:51:23,927 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 [2022-04-06 14:51:23,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:51:23,927 INFO L225 Difference]: With dead ends: 84 [2022-04-06 14:51:23,927 INFO L226 Difference]: Without dead ends: 75 [2022-04-06 14:51:23,938 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3602, Invalid=4588, Unknown=0, NotChecked=0, Total=8190 [2022-04-06 14:51:23,939 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 37 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:51:23,939 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 34 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:51:23,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-04-06 14:51:23,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-04-06 14:51:23,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 70 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:51:23,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2022-04-06 14:51:23,944 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 71 [2022-04-06 14:51:23,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:51:23,944 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2022-04-06 14:51:23,944 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) [2022-04-06 14:51:23,944 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2022-04-06 14:51:23,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-04-06 14:51:23,945 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:51:23,945 INFO L499 BasicCegarLoop]: trace histogram [31, 29, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:51:23,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-04-06 14:51:24,151 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-04-06 14:51:24,152 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:51:24,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:51:24,153 INFO L85 PathProgramCache]: Analyzing trace with hash -183221822, now seen corresponding path program 59 times [2022-04-06 14:51:24,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:24,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2134345549] [2022-04-06 14:51:24,179 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:24,212 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:24,212 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:51:24,213 INFO L85 PathProgramCache]: Analyzing trace with hash -89438033, now seen corresponding path program 1 times [2022-04-06 14:51:24,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:24,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894570324] [2022-04-06 14:51:24,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:24,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:24,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:24,216 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:51:24,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:24,219 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:51:24,219 INFO L85 PathProgramCache]: Analyzing trace with hash -183221822, now seen corresponding path program 60 times [2022-04-06 14:51:24,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:24,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135981978] [2022-04-06 14:51:24,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:24,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:24,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:24,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:51:24,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:24,587 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 90 proven. 870 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:24,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:51:24,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135981978] [2022-04-06 14:51:24,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135981978] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:51:24,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832700729] [2022-04-06 14:51:24,588 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:51:24,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:51:24,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:51:24,589 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) [2022-04-06 14:51:24,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-04-06 14:51:24,613 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 14:51:24,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:51:24,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 14:51:24,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:51:24,789 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2022-04-06 14:51:24,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:51:24,980 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2022-04-06 14:51:24,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832700729] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:51:24,980 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:51:24,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 8, 8] total 43 [2022-04-06 14:51:24,981 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:51:24,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2134345549] [2022-04-06 14:51:24,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2134345549] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:51:24,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:51:24,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-04-06 14:51:24,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786270663] [2022-04-06 14:51:24,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:51:24,981 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 14:51:24,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:24,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 14:51:24,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=538, Invalid=1268, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 14:51:24,982 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:51:25,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:51:25,482 INFO L93 Difference]: Finished difference Result 86 states and 92 transitions. [2022-04-06 14:51:25,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-06 14:51:25,482 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 [2022-04-06 14:51:25,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:51:25,483 INFO L225 Difference]: With dead ends: 86 [2022-04-06 14:51:25,483 INFO L226 Difference]: Without dead ends: 77 [2022-04-06 14:51:25,484 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1528, Invalid=3728, Unknown=0, NotChecked=0, Total=5256 [2022-04-06 14:51:25,484 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 38 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:51:25,485 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 34 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:51:25,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-04-06 14:51:25,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-04-06 14:51:25,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 72 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:51:25,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2022-04-06 14:51:25,490 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 73 [2022-04-06 14:51:25,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:51:25,491 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2022-04-06 14:51:25,491 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) [2022-04-06 14:51:25,491 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2022-04-06 14:51:25,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-04-06 14:51:25,491 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:51:25,491 INFO L499 BasicCegarLoop]: trace histogram [32, 30, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:51:25,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-04-06 14:51:25,705 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61,SelfDestructingSolverStorable62 [2022-04-06 14:51:25,706 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:51:25,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:51:25,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1513552991, now seen corresponding path program 61 times [2022-04-06 14:51:25,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:25,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [243491612] [2022-04-06 14:51:25,724 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:25,784 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:25,784 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:51:25,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1960094127, now seen corresponding path program 1 times [2022-04-06 14:51:25,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:25,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140951443] [2022-04-06 14:51:25,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:25,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:25,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:25,788 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:51:25,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:25,790 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:51:25,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1513552991, now seen corresponding path program 62 times [2022-04-06 14:51:25,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:25,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545963793] [2022-04-06 14:51:25,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:25,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:25,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:26,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:51:26,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:26,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 93 proven. 930 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:26,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:51:26,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545963793] [2022-04-06 14:51:26,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545963793] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:51:26,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147096129] [2022-04-06 14:51:26,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:51:26,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:51:26,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:51:26,166 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) [2022-04-06 14:51:26,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-04-06 14:51:26,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:51:26,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:51:26,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-06 14:51:26,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:51:26,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 93 proven. 930 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:26,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:51:26,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 93 proven. 930 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:26,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147096129] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:51:26,951 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:51:26,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 66 [2022-04-06 14:51:26,951 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:51:26,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [243491612] [2022-04-06 14:51:26,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [243491612] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:51:26,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:51:26,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-04-06 14:51:26,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89323553] [2022-04-06 14:51:26,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:51:26,952 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-04-06 14:51:26,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:26,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-04-06 14:51:26,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2022-04-06 14:51:26,953 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 33 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:51:27,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:51:27,348 INFO L93 Difference]: Finished difference Result 88 states and 94 transitions. [2022-04-06 14:51:27,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 14:51:27,348 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 [2022-04-06 14:51:27,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:51:27,349 INFO L225 Difference]: With dead ends: 88 [2022-04-06 14:51:27,349 INFO L226 Difference]: Without dead ends: 79 [2022-04-06 14:51:27,349 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=4098, Invalid=5214, Unknown=0, NotChecked=0, Total=9312 [2022-04-06 14:51:27,350 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 39 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:51:27,350 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 34 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:51:27,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-04-06 14:51:27,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-04-06 14:51:27,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.054054054054054) internal successors, (78), 74 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:51:27,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2022-04-06 14:51:27,362 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 75 [2022-04-06 14:51:27,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:51:27,362 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2022-04-06 14:51:27,362 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) [2022-04-06 14:51:27,362 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2022-04-06 14:51:27,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-04-06 14:51:27,362 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:51:27,362 INFO L499 BasicCegarLoop]: trace histogram [33, 31, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:51:27,378 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-04-06 14:51:27,575 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,SelfDestructingSolverStorable64,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:51:27,576 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:51:27,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:51:27,576 INFO L85 PathProgramCache]: Analyzing trace with hash 26575804, now seen corresponding path program 63 times [2022-04-06 14:51:27,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:27,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [583974084] [2022-04-06 14:51:27,601 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:27,627 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:27,627 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:51:27,628 INFO L85 PathProgramCache]: Analyzing trace with hash -285341009, now seen corresponding path program 1 times [2022-04-06 14:51:27,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:27,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32672534] [2022-04-06 14:51:27,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:27,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:27,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:27,646 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:51:27,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:27,667 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:51:27,667 INFO L85 PathProgramCache]: Analyzing trace with hash 26575804, now seen corresponding path program 64 times [2022-04-06 14:51:27,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:27,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030684114] [2022-04-06 14:51:27,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:27,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:27,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:28,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:51:28,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:28,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 96 proven. 992 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:28,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:51:28,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030684114] [2022-04-06 14:51:28,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030684114] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:51:28,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686293456] [2022-04-06 14:51:28,051 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:51:28,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:51:28,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:51:28,052 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) [2022-04-06 14:51:28,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-04-06 14:51:28,088 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:51:28,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:51:28,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 33 conjunts are in the unsatisfiable core [2022-04-06 14:51:28,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:51:28,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 96 proven. 992 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:28,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:51:29,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 96 proven. 992 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:29,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686293456] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:51:29,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:51:29,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 68 [2022-04-06 14:51:29,207 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:51:29,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [583974084] [2022-04-06 14:51:29,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [583974084] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:51:29,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:51:29,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-04-06 14:51:29,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511683321] [2022-04-06 14:51:29,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:51:29,207 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-06 14:51:29,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:29,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-06 14:51:29,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2022-04-06 14:51:29,209 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:51:29,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:51:29,765 INFO L93 Difference]: Finished difference Result 90 states and 96 transitions. [2022-04-06 14:51:29,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-04-06 14:51:29,766 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 [2022-04-06 14:51:29,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:51:29,766 INFO L225 Difference]: With dead ends: 90 [2022-04-06 14:51:29,766 INFO L226 Difference]: Without dead ends: 81 [2022-04-06 14:51:29,768 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4358, Invalid=5542, Unknown=0, NotChecked=0, Total=9900 [2022-04-06 14:51:29,768 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 40 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:51:29,768 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 39 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:51:29,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-04-06 14:51:29,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-04-06 14:51:29,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 76 states have internal predecessors, (80), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:51:29,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 84 transitions. [2022-04-06 14:51:29,772 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 84 transitions. Word has length 77 [2022-04-06 14:51:29,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:51:29,772 INFO L478 AbstractCegarLoop]: Abstraction has 81 states and 84 transitions. [2022-04-06 14:51:29,772 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) [2022-04-06 14:51:29,772 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 84 transitions. [2022-04-06 14:51:29,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-04-06 14:51:29,773 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:51:29,773 INFO L499 BasicCegarLoop]: trace histogram [34, 32, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:51:29,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-04-06 14:51:29,987 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,SelfDestructingSolverStorable66,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:51:29,987 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:51:29,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:51:29,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1265608665, now seen corresponding path program 65 times [2022-04-06 14:51:29,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:29,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [940516876] [2022-04-06 14:51:30,000 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:30,022 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:30,022 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:51:30,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1764191151, now seen corresponding path program 1 times [2022-04-06 14:51:30,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:30,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952580557] [2022-04-06 14:51:30,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:30,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:30,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:30,025 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:51:30,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:30,041 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:51:30,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1265608665, now seen corresponding path program 66 times [2022-04-06 14:51:30,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:30,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525949198] [2022-04-06 14:51:30,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:30,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:30,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:30,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:51:30,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:30,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:30,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:51:30,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525949198] [2022-04-06 14:51:30,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525949198] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:51:30,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254681196] [2022-04-06 14:51:30,360 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:51:30,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:51:30,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:51:30,361 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) [2022-04-06 14:51:30,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-04-06 14:51:30,392 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 14:51:30,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:51:30,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 14:51:30,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:51:30,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1056 trivial. 0 not checked. [2022-04-06 14:51:30,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:51:30,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1056 trivial. 0 not checked. [2022-04-06 14:51:30,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254681196] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:51:30,617 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:51:30,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 8, 8] total 46 [2022-04-06 14:51:30,618 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:51:30,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [940516876] [2022-04-06 14:51:30,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [940516876] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:51:30,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:51:30,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-04-06 14:51:30,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094797808] [2022-04-06 14:51:30,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:51:30,618 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-04-06 14:51:30,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:30,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-04-06 14:51:30,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=637, Invalid=1433, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 14:51:30,619 INFO L87 Difference]: Start difference. First operand 81 states and 84 transitions. Second operand has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 35 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:51:31,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:51:31,222 INFO L93 Difference]: Finished difference Result 92 states and 98 transitions. [2022-04-06 14:51:31,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 14:51:31,222 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 [2022-04-06 14:51:31,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:51:31,223 INFO L225 Difference]: With dead ends: 92 [2022-04-06 14:51:31,223 INFO L226 Difference]: Without dead ends: 83 [2022-04-06 14:51:31,224 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 149 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1031 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1825, Invalid=4337, Unknown=0, NotChecked=0, Total=6162 [2022-04-06 14:51:31,224 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 41 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:51:31,224 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 39 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:51:31,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-04-06 14:51:31,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-04-06 14:51:31,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.0512820512820513) internal successors, (82), 78 states have internal predecessors, (82), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:51:31,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2022-04-06 14:51:31,228 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 79 [2022-04-06 14:51:31,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:51:31,228 INFO L478 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2022-04-06 14:51:31,228 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) [2022-04-06 14:51:31,228 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2022-04-06 14:51:31,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-04-06 14:51:31,229 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:51:31,229 INFO L499 BasicCegarLoop]: trace histogram [35, 33, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:51:31,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-04-06 14:51:31,434 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67,SelfDestructingSolverStorable68 [2022-04-06 14:51:31,434 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:51:31,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:51:31,435 INFO L85 PathProgramCache]: Analyzing trace with hash -2024720202, now seen corresponding path program 67 times [2022-04-06 14:51:31,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:31,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [135240995] [2022-04-06 14:51:31,453 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:31,503 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:31,503 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:51:31,503 INFO L85 PathProgramCache]: Analyzing trace with hash -481243985, now seen corresponding path program 1 times [2022-04-06 14:51:31,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:31,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13220829] [2022-04-06 14:51:31,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:31,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:31,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:31,506 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:51:31,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:31,509 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:51:31,509 INFO L85 PathProgramCache]: Analyzing trace with hash -2024720202, now seen corresponding path program 68 times [2022-04-06 14:51:31,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:31,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420129958] [2022-04-06 14:51:31,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:31,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:31,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:31,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:51:31,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:31,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 102 proven. 1122 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:31,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:51:31,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420129958] [2022-04-06 14:51:31,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420129958] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:51:31,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100545703] [2022-04-06 14:51:31,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:51:31,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:51:31,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:51:31,941 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) [2022-04-06 14:51:31,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-04-06 14:51:31,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:51:31,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:51:31,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 14:51:31,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:51:32,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 102 proven. 1122 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:32,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:51:32,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 102 proven. 1122 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:32,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100545703] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:51:32,806 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:51:32,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 72 [2022-04-06 14:51:32,806 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:51:32,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [135240995] [2022-04-06 14:51:32,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [135240995] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:51:32,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:51:32,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-04-06 14:51:32,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813390918] [2022-04-06 14:51:32,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:51:32,807 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-06 14:51:32,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:32,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-06 14:51:32,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2022-04-06 14:51:32,808 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 36 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:51:33,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:51:33,254 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2022-04-06 14:51:33,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-04-06 14:51:33,254 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 [2022-04-06 14:51:33,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:51:33,254 INFO L225 Difference]: With dead ends: 94 [2022-04-06 14:51:33,255 INFO L226 Difference]: Without dead ends: 85 [2022-04-06 14:51:33,256 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=4902, Invalid=6228, Unknown=0, NotChecked=0, Total=11130 [2022-04-06 14:51:33,256 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 42 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:51:33,256 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 34 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:51:33,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-04-06 14:51:33,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-04-06 14:51:33,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.05) internal successors, (84), 80 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:51:33,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2022-04-06 14:51:33,260 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 81 [2022-04-06 14:51:33,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:51:33,260 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2022-04-06 14:51:33,261 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) [2022-04-06 14:51:33,261 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2022-04-06 14:51:33,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-04-06 14:51:33,261 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:51:33,261 INFO L499 BasicCegarLoop]: trace histogram [36, 34, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:51:33,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-04-06 14:51:33,467 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-04-06 14:51:33,467 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:51:33,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:51:33,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1360135763, now seen corresponding path program 69 times [2022-04-06 14:51:33,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:33,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2092997710] [2022-04-06 14:51:33,486 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:33,523 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:33,523 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:51:33,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1568288175, now seen corresponding path program 1 times [2022-04-06 14:51:33,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:33,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121609114] [2022-04-06 14:51:33,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:33,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:33,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:33,548 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:51:33,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:33,551 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:51:33,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1360135763, now seen corresponding path program 70 times [2022-04-06 14:51:33,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:33,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576795666] [2022-04-06 14:51:33,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:33,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:33,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:33,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:51:33,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:33,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 105 proven. 1190 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:33,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:51:33,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576795666] [2022-04-06 14:51:33,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576795666] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:51:33,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511081852] [2022-04-06 14:51:33,969 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:51:33,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:51:33,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:51:33,970 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) [2022-04-06 14:51:33,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-04-06 14:51:34,004 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:51:34,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:51:34,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-06 14:51:34,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:51:34,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 105 proven. 1190 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:34,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:51:34,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 105 proven. 1190 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:34,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511081852] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:51:34,847 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:51:34,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 74 [2022-04-06 14:51:34,847 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:51:34,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2092997710] [2022-04-06 14:51:34,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2092997710] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:51:34,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:51:34,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-04-06 14:51:34,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331906852] [2022-04-06 14:51:34,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:51:34,847 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-04-06 14:51:34,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:34,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-04-06 14:51:34,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2022-04-06 14:51:34,848 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 37 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:51:35,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:51:35,207 INFO L93 Difference]: Finished difference Result 96 states and 102 transitions. [2022-04-06 14:51:35,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 14:51:35,208 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 [2022-04-06 14:51:35,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:51:35,208 INFO L225 Difference]: With dead ends: 96 [2022-04-06 14:51:35,208 INFO L226 Difference]: Without dead ends: 87 [2022-04-06 14:51:35,210 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=5186, Invalid=6586, Unknown=0, NotChecked=0, Total=11772 [2022-04-06 14:51:35,211 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 43 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:51:35,214 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 44 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:51:35,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-04-06 14:51:35,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2022-04-06 14:51:35,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.048780487804878) internal successors, (86), 82 states have internal predecessors, (86), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:51:35,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 90 transitions. [2022-04-06 14:51:35,218 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 90 transitions. Word has length 83 [2022-04-06 14:51:35,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:51:35,218 INFO L478 AbstractCegarLoop]: Abstraction has 87 states and 90 transitions. [2022-04-06 14:51:35,219 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) [2022-04-06 14:51:35,219 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 90 transitions. [2022-04-06 14:51:35,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-04-06 14:51:35,219 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:51:35,219 INFO L499 BasicCegarLoop]: trace histogram [37, 35, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:51:35,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-04-06 14:51:35,435 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,SelfDestructingSolverStorable72,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:51:35,435 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:51:35,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:51:35,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1378492240, now seen corresponding path program 71 times [2022-04-06 14:51:35,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:35,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1438503662] [2022-04-06 14:51:35,452 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:35,509 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:35,509 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:51:35,509 INFO L85 PathProgramCache]: Analyzing trace with hash -677146961, now seen corresponding path program 1 times [2022-04-06 14:51:35,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:35,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631103487] [2022-04-06 14:51:35,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:35,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:35,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:35,512 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:51:35,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:35,514 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:51:35,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1378492240, now seen corresponding path program 72 times [2022-04-06 14:51:35,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:35,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600661584] [2022-04-06 14:51:35,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:35,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:35,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:36,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:51:36,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:36,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 108 proven. 1260 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:36,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:51:36,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600661584] [2022-04-06 14:51:36,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600661584] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:51:36,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944858916] [2022-04-06 14:51:36,013 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:51:36,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:51:36,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:51:36,014 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) [2022-04-06 14:51:36,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-04-06 14:51:36,040 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 14:51:36,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:51:36,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 14:51:36,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:51:36,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked. [2022-04-06 14:51:36,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:51:36,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked. [2022-04-06 14:51:36,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944858916] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:51:36,478 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:51:36,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 8, 8] total 49 [2022-04-06 14:51:36,478 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:51:36,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1438503662] [2022-04-06 14:51:36,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1438503662] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:51:36,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:51:36,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-04-06 14:51:36,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717114483] [2022-04-06 14:51:36,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:51:36,479 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-04-06 14:51:36,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:36,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-04-06 14:51:36,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=745, Invalid=1607, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 14:51:36,480 INFO L87 Difference]: Start difference. First operand 87 states and 90 transitions. Second operand has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 38 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:51:37,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:51:37,198 INFO L93 Difference]: Finished difference Result 98 states and 104 transitions. [2022-04-06 14:51:37,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-04-06 14:51:37,198 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 [2022-04-06 14:51:37,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:51:37,198 INFO L225 Difference]: With dead ends: 98 [2022-04-06 14:51:37,198 INFO L226 Difference]: Without dead ends: 89 [2022-04-06 14:51:37,199 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 161 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1178 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2149, Invalid=4991, Unknown=0, NotChecked=0, Total=7140 [2022-04-06 14:51:37,199 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 44 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:51:37,200 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 29 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:51:37,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-04-06 14:51:37,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-04-06 14:51:37,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 84 states have internal predecessors, (88), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:51:37,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 92 transitions. [2022-04-06 14:51:37,204 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 92 transitions. Word has length 85 [2022-04-06 14:51:37,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:51:37,205 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 92 transitions. [2022-04-06 14:51:37,205 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) [2022-04-06 14:51:37,205 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 92 transitions. [2022-04-06 14:51:37,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-04-06 14:51:37,205 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:51:37,205 INFO L499 BasicCegarLoop]: trace histogram [38, 36, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:51:37,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-04-06 14:51:37,415 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,SelfDestructingSolverStorable74,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:51:37,415 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:51:37,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:51:37,415 INFO L85 PathProgramCache]: Analyzing trace with hash -385050675, now seen corresponding path program 73 times [2022-04-06 14:51:37,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:37,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1154476703] [2022-04-06 14:51:37,434 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:37,504 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:37,505 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:51:37,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1372385199, now seen corresponding path program 1 times [2022-04-06 14:51:37,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:37,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390265231] [2022-04-06 14:51:37,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:37,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:37,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:37,518 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:51:37,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:37,526 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:51:37,526 INFO L85 PathProgramCache]: Analyzing trace with hash -385050675, now seen corresponding path program 74 times [2022-04-06 14:51:37,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:37,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249799289] [2022-04-06 14:51:37,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:37,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:37,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:37,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:51:37,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:37,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 111 proven. 1332 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:37,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:51:37,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249799289] [2022-04-06 14:51:37,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249799289] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:51:37,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067120570] [2022-04-06 14:51:37,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:51:37,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:51:37,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:51:37,922 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) [2022-04-06 14:51:37,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-04-06 14:51:37,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:51:37,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:51:37,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 14:51:37,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:51:38,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 111 proven. 1332 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:38,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:51:39,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 111 proven. 1332 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:39,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067120570] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:51:39,369 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:51:39,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 78 [2022-04-06 14:51:39,370 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:51:39,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1154476703] [2022-04-06 14:51:39,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1154476703] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:51:39,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:51:39,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-04-06 14:51:39,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446798506] [2022-04-06 14:51:39,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:51:39,370 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-04-06 14:51:39,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:39,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-04-06 14:51:39,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2022-04-06 14:51:39,372 INFO L87 Difference]: Start difference. First operand 89 states and 92 transitions. Second operand has 40 states, 40 states have (on average 2.075) internal successors, (83), 39 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:51:40,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:51:40,028 INFO L93 Difference]: Finished difference Result 100 states and 106 transitions. [2022-04-06 14:51:40,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-06 14:51:40,029 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 [2022-04-06 14:51:40,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:51:40,029 INFO L225 Difference]: With dead ends: 100 [2022-04-06 14:51:40,029 INFO L226 Difference]: Without dead ends: 91 [2022-04-06 14:51:40,031 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=5778, Invalid=7332, Unknown=0, NotChecked=0, Total=13110 [2022-04-06 14:51:40,031 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 45 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:51:40,031 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 39 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:51:40,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-04-06 14:51:40,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-04-06 14:51:40,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.0465116279069768) internal successors, (90), 86 states have internal predecessors, (90), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:51:40,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 94 transitions. [2022-04-06 14:51:40,035 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 94 transitions. Word has length 87 [2022-04-06 14:51:40,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:51:40,035 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 94 transitions. [2022-04-06 14:51:40,035 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) [2022-04-06 14:51:40,036 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 94 transitions. [2022-04-06 14:51:40,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-04-06 14:51:40,036 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:51:40,036 INFO L499 BasicCegarLoop]: trace histogram [39, 37, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:51:40,056 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-04-06 14:51:40,251 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,SelfDestructingSolverStorable76,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:51:40,252 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:51:40,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:51:40,252 INFO L85 PathProgramCache]: Analyzing trace with hash 829553578, now seen corresponding path program 75 times [2022-04-06 14:51:40,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:40,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1182699079] [2022-04-06 14:51:40,281 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:40,326 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:40,326 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:51:40,327 INFO L85 PathProgramCache]: Analyzing trace with hash -873049937, now seen corresponding path program 1 times [2022-04-06 14:51:40,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:40,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066511968] [2022-04-06 14:51:40,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:40,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:40,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:40,329 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:51:40,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:40,331 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:51:40,332 INFO L85 PathProgramCache]: Analyzing trace with hash 829553578, now seen corresponding path program 76 times [2022-04-06 14:51:40,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:40,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531613055] [2022-04-06 14:51:40,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:40,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:40,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:40,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:51:40,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:40,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 114 proven. 1406 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:40,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:51:40,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531613055] [2022-04-06 14:51:40,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531613055] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:51:40,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806385940] [2022-04-06 14:51:40,756 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:51:40,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:51:40,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:51:40,757 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) [2022-04-06 14:51:40,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-04-06 14:51:40,792 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:51:40,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:51:40,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 14:51:40,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:51:40,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 114 proven. 1406 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:40,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:51:41,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 114 proven. 1406 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:41,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806385940] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:51:41,877 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:51:41,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 80 [2022-04-06 14:51:41,878 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:51:41,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1182699079] [2022-04-06 14:51:41,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1182699079] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:51:41,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:51:41,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-04-06 14:51:41,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583540980] [2022-04-06 14:51:41,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:51:41,879 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-04-06 14:51:41,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:41,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-04-06 14:51:41,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2022-04-06 14:51:41,881 INFO L87 Difference]: Start difference. First operand 91 states and 94 transitions. Second operand has 41 states, 41 states have (on average 2.073170731707317) internal successors, (85), 40 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:51:42,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:51:42,301 INFO L93 Difference]: Finished difference Result 102 states and 108 transitions. [2022-04-06 14:51:42,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-04-06 14:51:42,301 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 [2022-04-06 14:51:42,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:51:42,301 INFO L225 Difference]: With dead ends: 102 [2022-04-06 14:51:42,301 INFO L226 Difference]: Without dead ends: 93 [2022-04-06 14:51:42,303 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=6086, Invalid=7720, Unknown=0, NotChecked=0, Total=13806 [2022-04-06 14:51:42,303 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 46 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:51:42,303 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 39 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:51:42,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-04-06 14:51:42,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-04-06 14:51:42,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 88 states have (on average 1.0454545454545454) internal successors, (92), 88 states have internal predecessors, (92), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:51:42,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 96 transitions. [2022-04-06 14:51:42,313 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 96 transitions. Word has length 89 [2022-04-06 14:51:42,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:51:42,313 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 96 transitions. [2022-04-06 14:51:42,313 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) [2022-04-06 14:51:42,313 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 96 transitions. [2022-04-06 14:51:42,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-04-06 14:51:42,315 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:51:42,315 INFO L499 BasicCegarLoop]: trace histogram [40, 38, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:51:42,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-04-06 14:51:42,527 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77,SelfDestructingSolverStorable78 [2022-04-06 14:51:42,527 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:51:42,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:51:42,528 INFO L85 PathProgramCache]: Analyzing trace with hash -166863801, now seen corresponding path program 77 times [2022-04-06 14:51:42,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:42,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [261359623] [2022-04-06 14:51:42,544 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:42,583 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:42,583 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:51:42,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1176482223, now seen corresponding path program 1 times [2022-04-06 14:51:42,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:42,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967514797] [2022-04-06 14:51:42,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:42,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:42,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:42,588 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:51:42,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:42,598 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:51:42,598 INFO L85 PathProgramCache]: Analyzing trace with hash -166863801, now seen corresponding path program 78 times [2022-04-06 14:51:42,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:42,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901338848] [2022-04-06 14:51:42,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:42,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:42,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:43,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:51:43,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:43,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 117 proven. 1482 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:43,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:51:43,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901338848] [2022-04-06 14:51:43,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901338848] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:51:43,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122998014] [2022-04-06 14:51:43,080 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:51:43,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:51:43,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:51:43,081 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) [2022-04-06 14:51:43,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-04-06 14:51:43,107 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 14:51:43,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:51:43,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 14:51:43,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:51:43,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 118 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2022-04-06 14:51:43,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:51:43,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 118 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2022-04-06 14:51:43,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122998014] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:51:43,644 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:51:43,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 8, 8] total 52 [2022-04-06 14:51:43,645 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:51:43,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [261359623] [2022-04-06 14:51:43,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [261359623] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:51:43,645 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:51:43,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-04-06 14:51:43,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005636802] [2022-04-06 14:51:43,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:51:43,645 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-04-06 14:51:43,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:43,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-04-06 14:51:43,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=862, Invalid=1790, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 14:51:43,646 INFO L87 Difference]: Start difference. First operand 93 states and 96 transitions. Second operand has 42 states, 42 states have (on average 2.0714285714285716) internal successors, (87), 41 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:51:44,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:51:44,434 INFO L93 Difference]: Finished difference Result 104 states and 110 transitions. [2022-04-06 14:51:44,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-06 14:51:44,434 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 [2022-04-06 14:51:44,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:51:44,435 INFO L225 Difference]: With dead ends: 104 [2022-04-06 14:51:44,435 INFO L226 Difference]: Without dead ends: 95 [2022-04-06 14:51:44,435 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 173 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1334 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2500, Invalid=5690, Unknown=0, NotChecked=0, Total=8190 [2022-04-06 14:51:44,436 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 47 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:51:44,436 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 29 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:51:44,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-04-06 14:51:44,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2022-04-06 14:51:44,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.0444444444444445) internal successors, (94), 90 states have internal predecessors, (94), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:51:44,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 98 transitions. [2022-04-06 14:51:44,440 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 98 transitions. Word has length 91 [2022-04-06 14:51:44,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:51:44,440 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 98 transitions. [2022-04-06 14:51:44,440 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) [2022-04-06 14:51:44,440 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 98 transitions. [2022-04-06 14:51:44,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-04-06 14:51:44,441 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:51:44,441 INFO L499 BasicCegarLoop]: trace histogram [41, 39, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:51:44,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-04-06 14:51:44,657 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-04-06 14:51:44,657 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:51:44,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:51:44,657 INFO L85 PathProgramCache]: Analyzing trace with hash 53741988, now seen corresponding path program 79 times [2022-04-06 14:51:44,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:44,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2045672789] [2022-04-06 14:51:44,682 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:44,727 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:44,728 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:51:44,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1068952913, now seen corresponding path program 1 times [2022-04-06 14:51:44,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:44,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866473202] [2022-04-06 14:51:44,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:44,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:44,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:44,731 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:51:44,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:44,736 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:51:44,736 INFO L85 PathProgramCache]: Analyzing trace with hash 53741988, now seen corresponding path program 80 times [2022-04-06 14:51:44,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:44,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400555807] [2022-04-06 14:51:44,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:44,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:44,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:45,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:51:45,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:45,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 120 proven. 1560 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:45,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:51:45,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400555807] [2022-04-06 14:51:45,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400555807] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:51:45,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777673147] [2022-04-06 14:51:45,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:51:45,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:51:45,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:51:45,238 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) [2022-04-06 14:51:45,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-04-06 14:51:45,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:51:45,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:51:45,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 14:51:45,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:51:45,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 120 proven. 1560 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:45,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:51:46,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 120 proven. 1560 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:46,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777673147] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:51:46,935 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:51:46,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 84 [2022-04-06 14:51:46,935 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:51:46,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2045672789] [2022-04-06 14:51:46,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2045672789] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:51:46,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:51:46,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-04-06 14:51:46,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315905322] [2022-04-06 14:51:46,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:51:46,936 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-04-06 14:51:46,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:46,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-04-06 14:51:46,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2022-04-06 14:51:46,937 INFO L87 Difference]: Start difference. First operand 95 states and 98 transitions. Second operand has 43 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 42 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:51:47,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:51:47,514 INFO L93 Difference]: Finished difference Result 106 states and 112 transitions. [2022-04-06 14:51:47,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-04-06 14:51:47,514 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 [2022-04-06 14:51:47,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:51:47,514 INFO L225 Difference]: With dead ends: 106 [2022-04-06 14:51:47,515 INFO L226 Difference]: Without dead ends: 97 [2022-04-06 14:51:47,516 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1013 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=6726, Invalid=8526, Unknown=0, NotChecked=0, Total=15252 [2022-04-06 14:51:47,516 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 48 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:51:47,516 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 34 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:51:47,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-04-06 14:51:47,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2022-04-06 14:51:47,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.0434782608695652) internal successors, (96), 92 states have internal predecessors, (96), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:51:47,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 100 transitions. [2022-04-06 14:51:47,521 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 100 transitions. Word has length 93 [2022-04-06 14:51:47,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:51:47,521 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 100 transitions. [2022-04-06 14:51:47,521 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) [2022-04-06 14:51:47,521 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 100 transitions. [2022-04-06 14:51:47,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-04-06 14:51:47,521 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:51:47,522 INFO L499 BasicCegarLoop]: trace histogram [42, 40, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:51:47,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-04-06 14:51:47,743 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81,SelfDestructingSolverStorable82 [2022-04-06 14:51:47,743 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:51:47,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:51:47,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1602507713, now seen corresponding path program 81 times [2022-04-06 14:51:47,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:47,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1731010871] [2022-04-06 14:51:47,781 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:47,829 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:47,829 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:51:47,829 INFO L85 PathProgramCache]: Analyzing trace with hash 980579247, now seen corresponding path program 1 times [2022-04-06 14:51:47,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:47,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727637541] [2022-04-06 14:51:47,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:47,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:47,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:47,832 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:51:47,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:47,834 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:51:47,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1602507713, now seen corresponding path program 82 times [2022-04-06 14:51:47,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:47,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180597963] [2022-04-06 14:51:47,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:47,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:47,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:48,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:51:48,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:48,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 123 proven. 1640 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:48,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:51:48,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180597963] [2022-04-06 14:51:48,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180597963] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:51:48,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544677541] [2022-04-06 14:51:48,322 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:51:48,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:51:48,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:51:48,323 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) [2022-04-06 14:51:48,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-04-06 14:51:48,374 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:51:48,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:51:48,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 42 conjunts are in the unsatisfiable core [2022-04-06 14:51:48,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:51:48,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 123 proven. 1640 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:48,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:51:49,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 123 proven. 1640 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:49,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544677541] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:51:49,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:51:49,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 43] total 86 [2022-04-06 14:51:49,507 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:51:49,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1731010871] [2022-04-06 14:51:49,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1731010871] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:51:49,507 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:51:49,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-04-06 14:51:49,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099114256] [2022-04-06 14:51:49,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:51:49,507 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-04-06 14:51:49,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:49,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-04-06 14:51:49,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2022-04-06 14:51:49,509 INFO L87 Difference]: Start difference. First operand 97 states and 100 transitions. Second operand has 44 states, 44 states have (on average 2.0681818181818183) internal successors, (91), 43 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:51:49,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:51:49,991 INFO L93 Difference]: Finished difference Result 108 states and 114 transitions. [2022-04-06 14:51:49,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-04-06 14:51:49,992 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 [2022-04-06 14:51:49,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:51:49,992 INFO L225 Difference]: With dead ends: 108 [2022-04-06 14:51:49,992 INFO L226 Difference]: Without dead ends: 99 [2022-04-06 14:51:49,995 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1059 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=7058, Invalid=8944, Unknown=0, NotChecked=0, Total=16002 [2022-04-06 14:51:49,995 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 49 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:51:49,996 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 24 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:51:49,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-04-06 14:51:50,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-04-06 14:51:50,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.0425531914893618) internal successors, (98), 94 states have internal predecessors, (98), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:51:50,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 102 transitions. [2022-04-06 14:51:50,001 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 102 transitions. Word has length 95 [2022-04-06 14:51:50,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:51:50,001 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 102 transitions. [2022-04-06 14:51:50,001 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) [2022-04-06 14:51:50,001 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 102 transitions. [2022-04-06 14:51:50,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-04-06 14:51:50,002 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:51:50,002 INFO L499 BasicCegarLoop]: trace histogram [43, 41, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:51:50,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-04-06 14:51:50,218 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,SelfDestructingSolverStorable84,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:51:50,218 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:51:50,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:51:50,218 INFO L85 PathProgramCache]: Analyzing trace with hash -387282274, now seen corresponding path program 83 times [2022-04-06 14:51:50,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:50,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2057908838] [2022-04-06 14:51:50,234 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:50,273 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:50,273 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:51:50,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1264855889, now seen corresponding path program 1 times [2022-04-06 14:51:50,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:50,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597569579] [2022-04-06 14:51:50,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:50,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:50,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:50,286 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:51:50,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:50,293 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:51:50,293 INFO L85 PathProgramCache]: Analyzing trace with hash -387282274, now seen corresponding path program 84 times [2022-04-06 14:51:50,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:50,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042594781] [2022-04-06 14:51:50,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:50,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:50,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:50,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:51:50,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:50,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 126 proven. 1722 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:50,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:51:50,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042594781] [2022-04-06 14:51:50,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042594781] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:51:50,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096212240] [2022-04-06 14:51:50,903 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:51:50,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:51:50,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:51:50,911 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) [2022-04-06 14:51:50,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-04-06 14:51:50,938 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 14:51:50,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:51:50,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 14:51:50,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:51:51,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2022-04-06 14:51:51,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:51:51,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2022-04-06 14:51:51,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096212240] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:51:51,251 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:51:51,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 8, 8] total 55 [2022-04-06 14:51:51,251 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:51:51,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2057908838] [2022-04-06 14:51:51,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2057908838] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:51:51,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:51:51,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-04-06 14:51:51,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898742520] [2022-04-06 14:51:51,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:51:51,252 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-04-06 14:51:51,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:51,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-04-06 14:51:51,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=988, Invalid=1982, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 14:51:51,252 INFO L87 Difference]: Start difference. First operand 99 states and 102 transitions. Second operand has 45 states, 45 states have (on average 2.066666666666667) internal successors, (93), 44 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:51:51,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:51:51,810 INFO L93 Difference]: Finished difference Result 110 states and 116 transitions. [2022-04-06 14:51:51,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-04-06 14:51:51,810 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 [2022-04-06 14:51:51,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:51:51,811 INFO L225 Difference]: With dead ends: 110 [2022-04-06 14:51:51,811 INFO L226 Difference]: Without dead ends: 101 [2022-04-06 14:51:51,812 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 185 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1499 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2878, Invalid=6434, Unknown=0, NotChecked=0, Total=9312 [2022-04-06 14:51:51,814 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 50 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:51:51,815 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 34 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:51:51,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-04-06 14:51:51,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2022-04-06 14:51:51,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.0416666666666667) internal successors, (100), 96 states have internal predecessors, (100), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:51:51,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 104 transitions. [2022-04-06 14:51:51,825 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 104 transitions. Word has length 97 [2022-04-06 14:51:51,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:51:51,825 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 104 transitions. [2022-04-06 14:51:51,826 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) [2022-04-06 14:51:51,826 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 104 transitions. [2022-04-06 14:51:51,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-04-06 14:51:51,826 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:51:51,826 INFO L499 BasicCegarLoop]: trace histogram [44, 42, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:51:51,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-04-06 14:51:52,039 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,SelfDestructingSolverStorable86,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:51:52,039 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:51:52,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:51:52,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1315013061, now seen corresponding path program 85 times [2022-04-06 14:51:52,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:52,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [219889464] [2022-04-06 14:51:52,074 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:52,122 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:52,122 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:51:52,123 INFO L85 PathProgramCache]: Analyzing trace with hash 784676271, now seen corresponding path program 1 times [2022-04-06 14:51:52,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:52,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138512646] [2022-04-06 14:51:52,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:52,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:52,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:52,127 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:51:52,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:52,130 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:51:52,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1315013061, now seen corresponding path program 86 times [2022-04-06 14:51:52,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:52,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326621276] [2022-04-06 14:51:52,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:52,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:52,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:52,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:51:52,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:52,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 129 proven. 1806 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:52,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:51:52,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326621276] [2022-04-06 14:51:52,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326621276] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:51:52,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48901219] [2022-04-06 14:51:52,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:51:52,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:51:52,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:51:52,660 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) [2022-04-06 14:51:52,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-04-06 14:51:52,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:51:52,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:51:52,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 44 conjunts are in the unsatisfiable core [2022-04-06 14:51:52,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:51:52,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 129 proven. 1806 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:52,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:51:53,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 129 proven. 1806 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:53,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48901219] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:51:53,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:51:53,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45, 45] total 90 [2022-04-06 14:51:53,961 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:51:53,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [219889464] [2022-04-06 14:51:53,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [219889464] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:51:53,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:51:53,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-04-06 14:51:53,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154819447] [2022-04-06 14:51:53,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:51:53,961 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-04-06 14:51:53,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:53,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-04-06 14:51:53,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2022-04-06 14:51:53,963 INFO L87 Difference]: Start difference. First operand 101 states and 104 transitions. Second operand has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 45 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:51:54,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:51:54,484 INFO L93 Difference]: Finished difference Result 112 states and 118 transitions. [2022-04-06 14:51:54,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-04-06 14:51:54,484 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 [2022-04-06 14:51:54,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:51:54,485 INFO L225 Difference]: With dead ends: 112 [2022-04-06 14:51:54,485 INFO L226 Difference]: Without dead ends: 103 [2022-04-06 14:51:54,487 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1154 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=7746, Invalid=9810, Unknown=0, NotChecked=0, Total=17556 [2022-04-06 14:51:54,487 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 51 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:51:54,511 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 39 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:51:54,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-04-06 14:51:54,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-04-06 14:51:54,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.0408163265306123) internal successors, (102), 98 states have internal predecessors, (102), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:51:54,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 106 transitions. [2022-04-06 14:51:54,516 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 106 transitions. Word has length 99 [2022-04-06 14:51:54,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:51:54,517 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 106 transitions. [2022-04-06 14:51:54,517 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) [2022-04-06 14:51:54,517 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 106 transitions. [2022-04-06 14:51:54,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-04-06 14:51:54,517 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:51:54,517 INFO L499 BasicCegarLoop]: trace histogram [45, 43, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:51:54,533 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-04-06 14:51:54,717 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87,SelfDestructingSolverStorable88 [2022-04-06 14:51:54,718 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:51:54,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:51:54,718 INFO L85 PathProgramCache]: Analyzing trace with hash 488898200, now seen corresponding path program 87 times [2022-04-06 14:51:54,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:54,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [851425024] [2022-04-06 14:51:54,735 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:54,776 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:54,776 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:51:54,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1460758865, now seen corresponding path program 1 times [2022-04-06 14:51:54,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:54,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845875225] [2022-04-06 14:51:54,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:54,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:54,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:54,780 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:51:54,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:54,782 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:51:54,782 INFO L85 PathProgramCache]: Analyzing trace with hash 488898200, now seen corresponding path program 88 times [2022-04-06 14:51:54,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:54,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406867210] [2022-04-06 14:51:54,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:54,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:54,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:55,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:51:55,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:55,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 132 proven. 1892 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:55,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:51:55,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406867210] [2022-04-06 14:51:55,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406867210] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:51:55,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750769841] [2022-04-06 14:51:55,241 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:51:55,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:51:55,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:51:55,242 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) [2022-04-06 14:51:55,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-04-06 14:51:55,317 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:51:55,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:51:55,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-06 14:51:55,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:51:55,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 132 proven. 1892 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:55,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:51:56,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 132 proven. 1892 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:56,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750769841] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:51:56,946 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:51:56,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 92 [2022-04-06 14:51:56,946 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:51:56,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [851425024] [2022-04-06 14:51:56,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [851425024] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:51:56,946 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:51:56,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-04-06 14:51:56,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301897357] [2022-04-06 14:51:56,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:51:56,947 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-04-06 14:51:56,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:56,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-04-06 14:51:56,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2022-04-06 14:51:56,949 INFO L87 Difference]: Start difference. First operand 103 states and 106 transitions. Second operand has 47 states, 47 states have (on average 2.0638297872340425) internal successors, (97), 46 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:51:57,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:51:57,815 INFO L93 Difference]: Finished difference Result 114 states and 120 transitions. [2022-04-06 14:51:57,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-04-06 14:51:57,815 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 [2022-04-06 14:51:57,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:51:57,816 INFO L225 Difference]: With dead ends: 114 [2022-04-06 14:51:57,816 INFO L226 Difference]: Without dead ends: 105 [2022-04-06 14:51:57,817 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=8102, Invalid=10258, Unknown=0, NotChecked=0, Total=18360 [2022-04-06 14:51:57,818 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 52 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:51:57,818 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 39 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:51:57,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-04-06 14:51:57,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-04-06 14:51:57,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.04) internal successors, (104), 100 states have internal predecessors, (104), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:51:57,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 108 transitions. [2022-04-06 14:51:57,822 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 108 transitions. Word has length 101 [2022-04-06 14:51:57,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:51:57,823 INFO L478 AbstractCegarLoop]: Abstraction has 105 states and 108 transitions. [2022-04-06 14:51:57,823 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) [2022-04-06 14:51:57,823 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 108 transitions. [2022-04-06 14:51:57,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-04-06 14:51:57,823 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:51:57,823 INFO L499 BasicCegarLoop]: trace histogram [46, 44, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:51:57,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-04-06 14:51:58,039 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-04-06 14:51:58,040 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:51:58,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:51:58,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1119167563, now seen corresponding path program 89 times [2022-04-06 14:51:58,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:58,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1514738839] [2022-04-06 14:51:58,058 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:58,095 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:51:58,096 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:51:58,096 INFO L85 PathProgramCache]: Analyzing trace with hash 588773295, now seen corresponding path program 1 times [2022-04-06 14:51:58,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:58,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688327579] [2022-04-06 14:51:58,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:58,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:58,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:58,101 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:51:58,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:51:58,103 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:51:58,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1119167563, now seen corresponding path program 90 times [2022-04-06 14:51:58,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:51:58,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351867716] [2022-04-06 14:51:58,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:51:58,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:51:58,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:58,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:51:58,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:51:58,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 135 proven. 1980 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:51:58,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:51:58,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351867716] [2022-04-06 14:51:58,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351867716] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:51:58,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796685083] [2022-04-06 14:51:58,788 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:51:58,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:51:58,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:51:58,789 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) [2022-04-06 14:51:58,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-04-06 14:51:58,815 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 14:51:58,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:51:58,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 14:51:58,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:51:59,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 1980 trivial. 0 not checked. [2022-04-06 14:51:59,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:51:59,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 1980 trivial. 0 not checked. [2022-04-06 14:51:59,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796685083] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:51:59,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:51:59,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 8, 8] total 58 [2022-04-06 14:51:59,212 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:51:59,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1514738839] [2022-04-06 14:51:59,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1514738839] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:51:59,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:51:59,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-04-06 14:51:59,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81764422] [2022-04-06 14:51:59,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:51:59,213 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-04-06 14:51:59,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:51:59,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-04-06 14:51:59,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1123, Invalid=2183, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 14:51:59,214 INFO L87 Difference]: Start difference. First operand 105 states and 108 transitions. Second operand has 48 states, 48 states have (on average 2.0625) internal successors, (99), 47 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:52:00,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:52:00,189 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2022-04-06 14:52:00,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-04-06 14:52:00,189 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 [2022-04-06 14:52:00,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:52:00,190 INFO L225 Difference]: With dead ends: 116 [2022-04-06 14:52:00,190 INFO L226 Difference]: Without dead ends: 107 [2022-04-06 14:52:00,190 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 197 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1673 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3283, Invalid=7223, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 14:52:00,191 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 53 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:52:00,191 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 39 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:52:00,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-04-06 14:52:00,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2022-04-06 14:52:00,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.0392156862745099) internal successors, (106), 102 states have internal predecessors, (106), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:52:00,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 110 transitions. [2022-04-06 14:52:00,196 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 110 transitions. Word has length 103 [2022-04-06 14:52:00,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:52:00,196 INFO L478 AbstractCegarLoop]: Abstraction has 107 states and 110 transitions. [2022-04-06 14:52:00,196 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) [2022-04-06 14:52:00,196 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 110 transitions. [2022-04-06 14:52:00,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-04-06 14:52:00,196 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:52:00,196 INFO L499 BasicCegarLoop]: trace histogram [47, 45, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:52:00,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-04-06 14:52:00,412 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,SelfDestructingSolverStorable92,46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:52:00,412 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:52:00,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:52:00,412 INFO L85 PathProgramCache]: Analyzing trace with hash -282139246, now seen corresponding path program 91 times [2022-04-06 14:52:00,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:52:00,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1506380800] [2022-04-06 14:52:00,435 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:52:00,483 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:52:00,483 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:52:00,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1656661841, now seen corresponding path program 1 times [2022-04-06 14:52:00,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:52:00,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456806299] [2022-04-06 14:52:00,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:52:00,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:52:00,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:52:00,486 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:52:00,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:52:00,488 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:52:00,488 INFO L85 PathProgramCache]: Analyzing trace with hash -282139246, now seen corresponding path program 92 times [2022-04-06 14:52:00,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:52:00,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885785800] [2022-04-06 14:52:00,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:52:00,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:52:00,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:52:01,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:52:01,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:52:01,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 138 proven. 2070 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:52:01,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:52:01,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885785800] [2022-04-06 14:52:01,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885785800] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:52:01,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581734370] [2022-04-06 14:52:01,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:52:01,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:52:01,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:52:01,053 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) [2022-04-06 14:52:01,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-04-06 14:52:01,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:52:01,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:52:01,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 14:52:01,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:52:01,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 138 proven. 2070 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:52:01,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:52:02,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 138 proven. 2070 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:52:02,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581734370] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:52:02,461 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:52:02,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 96 [2022-04-06 14:52:02,462 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:52:02,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1506380800] [2022-04-06 14:52:02,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1506380800] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:52:02,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:52:02,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-04-06 14:52:02,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897237111] [2022-04-06 14:52:02,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:52:02,462 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-04-06 14:52:02,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:52:02,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-04-06 14:52:02,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2022-04-06 14:52:02,463 INFO L87 Difference]: Start difference. First operand 107 states and 110 transitions. Second operand has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 48 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:52:03,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:52:03,129 INFO L93 Difference]: Finished difference Result 118 states and 124 transitions. [2022-04-06 14:52:03,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-04-06 14:52:03,130 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 [2022-04-06 14:52:03,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:52:03,130 INFO L225 Difference]: With dead ends: 118 [2022-04-06 14:52:03,130 INFO L226 Difference]: Without dead ends: 109 [2022-04-06 14:52:03,132 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1304 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=8838, Invalid=11184, Unknown=0, NotChecked=0, Total=20022 [2022-04-06 14:52:03,133 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 54 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:52:03,133 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 44 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:52:03,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-04-06 14:52:03,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2022-04-06 14:52:03,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.0384615384615385) internal successors, (108), 104 states have internal predecessors, (108), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:52:03,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 112 transitions. [2022-04-06 14:52:03,138 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 112 transitions. Word has length 105 [2022-04-06 14:52:03,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:52:03,138 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 112 transitions. [2022-04-06 14:52:03,138 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) [2022-04-06 14:52:03,138 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 112 transitions. [2022-04-06 14:52:03,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-04-06 14:52:03,139 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:52:03,139 INFO L499 BasicCegarLoop]: trace histogram [48, 46, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:52:03,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-04-06 14:52:03,355 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,SelfDestructingSolverStorable94,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:52:03,355 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:52:03,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:52:03,355 INFO L85 PathProgramCache]: Analyzing trace with hash 943189039, now seen corresponding path program 93 times [2022-04-06 14:52:03,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:52:03,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1271115703] [2022-04-06 14:52:03,368 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:52:03,392 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:52:03,392 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:52:03,392 INFO L85 PathProgramCache]: Analyzing trace with hash 392870319, now seen corresponding path program 1 times [2022-04-06 14:52:03,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:52:03,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55361138] [2022-04-06 14:52:03,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:52:03,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:52:03,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:52:03,395 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:52:03,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:52:03,397 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:52:03,397 INFO L85 PathProgramCache]: Analyzing trace with hash 943189039, now seen corresponding path program 94 times [2022-04-06 14:52:03,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:52:03,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892164430] [2022-04-06 14:52:03,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:52:03,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:52:03,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:52:04,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:52:04,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:52:04,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 141 proven. 2162 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:52:04,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:52:04,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892164430] [2022-04-06 14:52:04,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892164430] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:52:04,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116858809] [2022-04-06 14:52:04,130 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:52:04,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:52:04,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:52:04,131 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:52:04,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-04-06 14:52:04,169 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:52:04,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:52:04,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 48 conjunts are in the unsatisfiable core [2022-04-06 14:52:04,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:52:04,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 141 proven. 2162 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:52:04,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:52:06,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 141 proven. 2162 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:52:06,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116858809] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:52:06,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:52:06,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 49] total 98 [2022-04-06 14:52:06,023 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:52:06,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1271115703] [2022-04-06 14:52:06,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1271115703] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:52:06,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:52:06,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-04-06 14:52:06,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288683971] [2022-04-06 14:52:06,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:52:06,028 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-04-06 14:52:06,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:52:06,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-04-06 14:52:06,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-04-06 14:52:06,035 INFO L87 Difference]: Start difference. First operand 109 states and 112 transitions. Second operand has 50 states, 50 states have (on average 2.06) internal successors, (103), 49 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:52:06,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:52:06,985 INFO L93 Difference]: Finished difference Result 120 states and 126 transitions. [2022-04-06 14:52:06,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-04-06 14:52:06,986 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.06) internal successors, (103), 49 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 107 [2022-04-06 14:52:06,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:52:06,986 INFO L225 Difference]: With dead ends: 120 [2022-04-06 14:52:06,986 INFO L226 Difference]: Without dead ends: 111 [2022-04-06 14:52:06,988 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1356 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=9218, Invalid=11662, Unknown=0, NotChecked=0, Total=20880 [2022-04-06 14:52:06,988 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 55 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:52:06,988 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 34 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:52:06,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-04-06 14:52:06,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2022-04-06 14:52:06,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.0377358490566038) internal successors, (110), 106 states have internal predecessors, (110), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:52:06,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 114 transitions. [2022-04-06 14:52:06,993 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 114 transitions. Word has length 107 [2022-04-06 14:52:06,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:52:06,993 INFO L478 AbstractCegarLoop]: Abstraction has 111 states and 114 transitions. [2022-04-06 14:52:06,993 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.06) internal successors, (103), 49 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:52:06,993 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 114 transitions. [2022-04-06 14:52:06,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-04-06 14:52:06,994 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:52:06,994 INFO L499 BasicCegarLoop]: trace histogram [49, 47, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:52:07,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-04-06 14:52:07,199 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,SelfDestructingSolverStorable96,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:52:07,199 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:52:07,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:52:07,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1662631820, now seen corresponding path program 95 times [2022-04-06 14:52:07,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:52:07,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [141648238] [2022-04-06 14:52:07,228 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:52:07,273 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:52:07,274 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:52:07,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1852564817, now seen corresponding path program 1 times [2022-04-06 14:52:07,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:52:07,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502623390] [2022-04-06 14:52:07,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:52:07,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:52:07,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:52:07,285 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:52:07,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:52:07,287 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:52:07,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1662631820, now seen corresponding path program 96 times [2022-04-06 14:52:07,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:52:07,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966972729] [2022-04-06 14:52:07,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:52:07,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:52:07,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:52:08,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:52:08,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:52:08,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 144 proven. 2256 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:52:08,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:52:08,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966972729] [2022-04-06 14:52:08,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966972729] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:52:08,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305098445] [2022-04-06 14:52:08,137 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:52:08,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:52:08,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:52:08,138 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:52:08,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-04-06 14:52:08,170 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 14:52:08,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:52:08,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 14:52:08,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:52:08,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 2256 trivial. 0 not checked. [2022-04-06 14:52:08,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:52:08,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 2256 trivial. 0 not checked. [2022-04-06 14:52:08,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305098445] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:52:08,651 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:52:08,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 8, 8] total 61 [2022-04-06 14:52:08,651 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:52:08,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [141648238] [2022-04-06 14:52:08,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [141648238] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:52:08,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:52:08,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-04-06 14:52:08,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736192319] [2022-04-06 14:52:08,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:52:08,651 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-04-06 14:52:08,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:52:08,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-04-06 14:52:08,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1267, Invalid=2393, Unknown=0, NotChecked=0, Total=3660 [2022-04-06 14:52:08,653 INFO L87 Difference]: Start difference. First operand 111 states and 114 transitions. Second operand has 51 states, 51 states have (on average 2.0588235294117645) internal successors, (105), 50 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:52:09,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:52:09,509 INFO L93 Difference]: Finished difference Result 122 states and 128 transitions. [2022-04-06 14:52:09,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-04-06 14:52:09,510 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0588235294117645) internal successors, (105), 50 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 109 [2022-04-06 14:52:09,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:52:09,511 INFO L225 Difference]: With dead ends: 122 [2022-04-06 14:52:09,511 INFO L226 Difference]: Without dead ends: 113 [2022-04-06 14:52:09,512 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 209 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1856 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3715, Invalid=8057, Unknown=0, NotChecked=0, Total=11772 [2022-04-06 14:52:09,513 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 56 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:52:09,514 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 44 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:52:09,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-04-06 14:52:09,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2022-04-06 14:52:09,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.037037037037037) internal successors, (112), 108 states have internal predecessors, (112), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:52:09,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 116 transitions. [2022-04-06 14:52:09,519 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 116 transitions. Word has length 109 [2022-04-06 14:52:09,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:52:09,519 INFO L478 AbstractCegarLoop]: Abstraction has 113 states and 116 transitions. [2022-04-06 14:52:09,519 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.0588235294117645) internal successors, (105), 50 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:52:09,519 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 116 transitions. [2022-04-06 14:52:09,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-04-06 14:52:09,525 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:52:09,526 INFO L499 BasicCegarLoop]: trace histogram [50, 48, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:52:09,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-04-06 14:52:09,741 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2022-04-06 14:52:09,742 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:52:09,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:52:09,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1557409705, now seen corresponding path program 97 times [2022-04-06 14:52:09,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:52:09,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [106837451] [2022-04-06 14:52:09,765 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:52:09,793 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:52:09,793 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:52:09,793 INFO L85 PathProgramCache]: Analyzing trace with hash 196967343, now seen corresponding path program 1 times [2022-04-06 14:52:09,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:52:09,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160931530] [2022-04-06 14:52:09,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:52:09,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:52:09,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:52:09,796 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:52:09,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:52:09,801 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:52:09,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1557409705, now seen corresponding path program 98 times [2022-04-06 14:52:09,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:52:09,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307001971] [2022-04-06 14:52:09,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:52:09,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:52:09,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:52:10,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:52:10,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:52:10,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 147 proven. 2352 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:52:10,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:52:10,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307001971] [2022-04-06 14:52:10,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307001971] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:52:10,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103559437] [2022-04-06 14:52:10,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:52:10,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:52:10,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:52:10,415 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:52:10,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-04-06 14:52:10,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:52:10,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:52:10,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 50 conjunts are in the unsatisfiable core [2022-04-06 14:52:10,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:52:10,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 147 proven. 2352 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:52:10,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:52:13,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 147 proven. 2352 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:52:13,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103559437] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:52:13,086 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:52:13,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51, 51] total 102 [2022-04-06 14:52:13,086 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:52:13,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [106837451] [2022-04-06 14:52:13,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [106837451] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:52:13,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:52:13,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-04-06 14:52:13,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935866327] [2022-04-06 14:52:13,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:52:13,087 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-04-06 14:52:13,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:52:13,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-04-06 14:52:13,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2022-04-06 14:52:13,088 INFO L87 Difference]: Start difference. First operand 113 states and 116 transitions. Second operand has 52 states, 52 states have (on average 2.0576923076923075) internal successors, (107), 51 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:52:13,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:52:13,943 INFO L93 Difference]: Finished difference Result 124 states and 130 transitions. [2022-04-06 14:52:13,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-04-06 14:52:13,943 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.0576923076923075) internal successors, (107), 51 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 111 [2022-04-06 14:52:13,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:52:13,944 INFO L225 Difference]: With dead ends: 124 [2022-04-06 14:52:13,944 INFO L226 Difference]: Without dead ends: 115 [2022-04-06 14:52:13,946 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1463 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=10002, Invalid=12648, Unknown=0, NotChecked=0, Total=22650 [2022-04-06 14:52:13,948 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 57 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:52:13,948 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 34 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:52:13,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-04-06 14:52:13,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2022-04-06 14:52:13,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.0363636363636364) internal successors, (114), 110 states have internal predecessors, (114), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:52:13,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 118 transitions. [2022-04-06 14:52:13,968 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 118 transitions. Word has length 111 [2022-04-06 14:52:13,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:52:13,968 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 118 transitions. [2022-04-06 14:52:13,995 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.0576923076923075) internal successors, (107), 51 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:52:13,995 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 118 transitions. [2022-04-06 14:52:13,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-04-06 14:52:13,996 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:52:13,996 INFO L499 BasicCegarLoop]: trace histogram [51, 49, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:52:14,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-04-06 14:52:14,211 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99,SelfDestructingSolverStorable100 [2022-04-06 14:52:14,212 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:52:14,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:52:14,212 INFO L85 PathProgramCache]: Analyzing trace with hash -776795002, now seen corresponding path program 99 times [2022-04-06 14:52:14,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:52:14,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [531816102] [2022-04-06 14:52:14,225 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:52:14,257 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:52:14,258 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:52:14,258 INFO L85 PathProgramCache]: Analyzing trace with hash -2048467793, now seen corresponding path program 1 times [2022-04-06 14:52:14,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:52:14,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406884077] [2022-04-06 14:52:14,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:52:14,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:52:14,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:52:14,270 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:52:14,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:52:14,273 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:52:14,273 INFO L85 PathProgramCache]: Analyzing trace with hash -776795002, now seen corresponding path program 100 times [2022-04-06 14:52:14,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:52:14,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89481916] [2022-04-06 14:52:14,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:52:14,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:52:14,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:52:14,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:52:14,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:52:14,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 150 proven. 2450 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:52:14,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:52:14,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89481916] [2022-04-06 14:52:14,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89481916] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:52:14,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767706418] [2022-04-06 14:52:14,905 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:52:14,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:52:14,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:52:14,920 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:52:14,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-04-06 14:52:15,030 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:52:15,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:52:15,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 51 conjunts are in the unsatisfiable core [2022-04-06 14:52:15,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:52:15,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 150 proven. 2450 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:52:15,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:52:17,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 150 proven. 2450 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:52:17,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767706418] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:52:17,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:52:17,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 52] total 104 [2022-04-06 14:52:17,159 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:52:17,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [531816102] [2022-04-06 14:52:17,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [531816102] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:52:17,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:52:17,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-04-06 14:52:17,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678370165] [2022-04-06 14:52:17,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:52:17,159 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-04-06 14:52:17,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:52:17,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-04-06 14:52:17,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 14:52:17,161 INFO L87 Difference]: Start difference. First operand 115 states and 118 transitions. Second operand has 53 states, 53 states have (on average 2.056603773584906) internal successors, (109), 52 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:52:17,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:52:17,951 INFO L93 Difference]: Finished difference Result 126 states and 132 transitions. [2022-04-06 14:52:17,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-04-06 14:52:17,952 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.056603773584906) internal successors, (109), 52 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 113 [2022-04-06 14:52:17,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:52:17,968 INFO L225 Difference]: With dead ends: 126 [2022-04-06 14:52:17,968 INFO L226 Difference]: Without dead ends: 117 [2022-04-06 14:52:17,970 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1518 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=10406, Invalid=13156, Unknown=0, NotChecked=0, Total=23562 [2022-04-06 14:52:17,970 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 58 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:52:17,970 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 24 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:52:17,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-04-06 14:52:17,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2022-04-06 14:52:17,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.0357142857142858) internal successors, (116), 112 states have internal predecessors, (116), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:52:17,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 120 transitions. [2022-04-06 14:52:17,975 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 120 transitions. Word has length 113 [2022-04-06 14:52:17,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:52:17,976 INFO L478 AbstractCegarLoop]: Abstraction has 117 states and 120 transitions. [2022-04-06 14:52:17,976 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.056603773584906) internal successors, (109), 52 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:52:17,976 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 120 transitions. [2022-04-06 14:52:17,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-04-06 14:52:17,976 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:52:17,976 INFO L499 BasicCegarLoop]: trace histogram [52, 50, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:52:17,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-04-06 14:52:18,192 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101,SelfDestructingSolverStorable102 [2022-04-06 14:52:18,192 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:52:18,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:52:18,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1974589917, now seen corresponding path program 101 times [2022-04-06 14:52:18,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:52:18,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [471339318] [2022-04-06 14:52:18,206 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:52:18,240 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:52:18,240 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:52:18,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1064367, now seen corresponding path program 1 times [2022-04-06 14:52:18,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:52:18,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524999248] [2022-04-06 14:52:18,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:52:18,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:52:18,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:52:18,243 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:52:18,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:52:18,245 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:52:18,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1974589917, now seen corresponding path program 102 times [2022-04-06 14:52:18,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:52:18,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467289269] [2022-04-06 14:52:18,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:52:18,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:52:18,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:52:18,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:52:18,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:52:18,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 153 proven. 2550 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:52:18,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:52:18,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467289269] [2022-04-06 14:52:18,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467289269] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:52:18,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540269123] [2022-04-06 14:52:18,912 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:52:18,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:52:18,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:52:18,913 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:52:18,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-04-06 14:52:18,958 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 14:52:18,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:52:18,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 14:52:18,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:52:19,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2022-04-06 14:52:19,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:52:19,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2022-04-06 14:52:19,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540269123] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:52:19,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:52:19,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 8, 8] total 64 [2022-04-06 14:52:19,333 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:52:19,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [471339318] [2022-04-06 14:52:19,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [471339318] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:52:19,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:52:19,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-04-06 14:52:19,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205294065] [2022-04-06 14:52:19,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:52:19,333 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-04-06 14:52:19,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:52:19,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-04-06 14:52:19,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1420, Invalid=2612, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 14:52:19,334 INFO L87 Difference]: Start difference. First operand 117 states and 120 transitions. Second operand has 54 states, 54 states have (on average 2.0555555555555554) internal successors, (111), 53 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:52:20,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:52:20,200 INFO L93 Difference]: Finished difference Result 128 states and 134 transitions. [2022-04-06 14:52:20,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-04-06 14:52:20,200 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0555555555555554) internal successors, (111), 53 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 115 [2022-04-06 14:52:20,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:52:20,201 INFO L225 Difference]: With dead ends: 128 [2022-04-06 14:52:20,201 INFO L226 Difference]: Without dead ends: 119 [2022-04-06 14:52:20,203 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 221 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2048 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=4174, Invalid=8936, Unknown=0, NotChecked=0, Total=13110 [2022-04-06 14:52:20,203 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 59 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:52:20,203 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 29 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:52:20,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-04-06 14:52:20,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2022-04-06 14:52:20,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.0350877192982457) internal successors, (118), 114 states have internal predecessors, (118), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:52:20,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 122 transitions. [2022-04-06 14:52:20,208 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 122 transitions. Word has length 115 [2022-04-06 14:52:20,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:52:20,209 INFO L478 AbstractCegarLoop]: Abstraction has 119 states and 122 transitions. [2022-04-06 14:52:20,209 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.0555555555555554) internal successors, (111), 53 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:52:20,209 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 122 transitions. [2022-04-06 14:52:20,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-04-06 14:52:20,209 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:52:20,209 INFO L499 BasicCegarLoop]: trace histogram [53, 51, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:52:20,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-04-06 14:52:20,415 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-04-06 14:52:20,415 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:52:20,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:52:20,416 INFO L85 PathProgramCache]: Analyzing trace with hash -2004267904, now seen corresponding path program 103 times [2022-04-06 14:52:20,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:52:20,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [452815977] [2022-04-06 14:52:20,439 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:52:20,474 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:52:20,475 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:52:20,475 INFO L85 PathProgramCache]: Analyzing trace with hash 2050596527, now seen corresponding path program 1 times [2022-04-06 14:52:20,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:52:20,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040245035] [2022-04-06 14:52:20,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:52:20,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:52:20,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:52:20,482 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:52:20,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:52:20,492 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:52:20,492 INFO L85 PathProgramCache]: Analyzing trace with hash -2004267904, now seen corresponding path program 104 times [2022-04-06 14:52:20,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:52:20,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854496656] [2022-04-06 14:52:20,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:52:20,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:52:20,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:52:21,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:52:21,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:52:21,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 156 proven. 2652 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:52:21,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:52:21,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854496656] [2022-04-06 14:52:21,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854496656] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:52:21,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614218060] [2022-04-06 14:52:21,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:52:21,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:52:21,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:52:21,719 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:52:21,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-04-06 14:52:21,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:52:21,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:52:21,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 53 conjunts are in the unsatisfiable core [2022-04-06 14:52:21,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:52:21,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 156 proven. 2652 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:52:21,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:52:23,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 156 proven. 2652 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:52:23,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614218060] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:52:23,906 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:52:23,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54, 54] total 108 [2022-04-06 14:52:23,906 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:52:23,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [452815977] [2022-04-06 14:52:23,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [452815977] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:52:23,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:52:23,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-04-06 14:52:23,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267097854] [2022-04-06 14:52:23,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:52:23,907 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-04-06 14:52:23,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:52:23,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-04-06 14:52:23,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2022-04-06 14:52:23,908 INFO L87 Difference]: Start difference. First operand 119 states and 122 transitions. Second operand has 55 states, 55 states have (on average 2.0545454545454547) internal successors, (113), 54 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:52:25,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:52:25,127 INFO L93 Difference]: Finished difference Result 130 states and 136 transitions. [2022-04-06 14:52:25,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-04-06 14:52:25,127 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.0545454545454547) internal successors, (113), 54 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 117 [2022-04-06 14:52:25,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:52:25,128 INFO L225 Difference]: With dead ends: 130 [2022-04-06 14:52:25,128 INFO L226 Difference]: Without dead ends: 121 [2022-04-06 14:52:25,130 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1631 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=11238, Invalid=14202, Unknown=0, NotChecked=0, Total=25440 [2022-04-06 14:52:25,130 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 60 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:52:25,130 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 44 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:52:25,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-04-06 14:52:25,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-04-06 14:52:25,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.0344827586206897) internal successors, (120), 116 states have internal predecessors, (120), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:52:25,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 124 transitions. [2022-04-06 14:52:25,136 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 124 transitions. Word has length 117 [2022-04-06 14:52:25,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:52:25,136 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 124 transitions. [2022-04-06 14:52:25,136 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.0545454545454547) internal successors, (113), 54 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:52:25,136 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 124 transitions. [2022-04-06 14:52:25,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-04-06 14:52:25,136 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:52:25,136 INFO L499 BasicCegarLoop]: trace histogram [54, 52, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:52:25,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-04-06 14:52:25,345 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105,SelfDestructingSolverStorable106 [2022-04-06 14:52:25,345 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:52:25,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:52:25,345 INFO L85 PathProgramCache]: Analyzing trace with hash -460042339, now seen corresponding path program 105 times [2022-04-06 14:52:25,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:52:25,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [762582623] [2022-04-06 14:52:25,362 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:52:25,391 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:52:25,391 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:52:25,391 INFO L85 PathProgramCache]: Analyzing trace with hash -194838609, now seen corresponding path program 1 times [2022-04-06 14:52:25,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:52:25,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131093913] [2022-04-06 14:52:25,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:52:25,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:52:25,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:52:25,396 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:52:25,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:52:25,400 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:52:25,400 INFO L85 PathProgramCache]: Analyzing trace with hash -460042339, now seen corresponding path program 106 times [2022-04-06 14:52:25,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:52:25,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644797910] [2022-04-06 14:52:25,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:52:25,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:52:25,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:52:26,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:52:26,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:52:26,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 159 proven. 2756 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:52:26,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:52:26,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644797910] [2022-04-06 14:52:26,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644797910] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:52:26,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105286589] [2022-04-06 14:52:26,193 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:52:26,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:52:26,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:52:26,194 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:52:26,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-04-06 14:52:26,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:52:26,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:52:26,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 54 conjunts are in the unsatisfiable core [2022-04-06 14:52:26,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:52:26,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 159 proven. 2756 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:52:26,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:52:28,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 159 proven. 2756 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:52:28,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105286589] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:52:28,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:52:28,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55, 55] total 110 [2022-04-06 14:52:28,167 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:52:28,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [762582623] [2022-04-06 14:52:28,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [762582623] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:52:28,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:52:28,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-04-06 14:52:28,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039005578] [2022-04-06 14:52:28,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:52:28,168 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-04-06 14:52:28,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:52:28,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-04-06 14:52:28,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2022-04-06 14:52:28,169 INFO L87 Difference]: Start difference. First operand 121 states and 124 transitions. Second operand has 56 states, 56 states have (on average 2.0535714285714284) internal successors, (115), 55 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:52:28,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:52:28,952 INFO L93 Difference]: Finished difference Result 132 states and 138 transitions. [2022-04-06 14:52:28,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-04-06 14:52:28,952 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0535714285714284) internal successors, (115), 55 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 119 [2022-04-06 14:52:28,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:52:28,953 INFO L225 Difference]: With dead ends: 132 [2022-04-06 14:52:28,953 INFO L226 Difference]: Without dead ends: 123 [2022-04-06 14:52:28,955 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1689 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=11666, Invalid=14740, Unknown=0, NotChecked=0, Total=26406 [2022-04-06 14:52:28,956 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 61 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:52:28,956 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 49 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:52:28,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-04-06 14:52:28,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2022-04-06 14:52:28,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.0338983050847457) internal successors, (122), 118 states have internal predecessors, (122), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:52:28,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 126 transitions. [2022-04-06 14:52:28,962 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 126 transitions. Word has length 119 [2022-04-06 14:52:28,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:52:28,962 INFO L478 AbstractCegarLoop]: Abstraction has 123 states and 126 transitions. [2022-04-06 14:52:28,962 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.0535714285714284) internal successors, (115), 55 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:52:28,962 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 126 transitions. [2022-04-06 14:52:28,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-04-06 14:52:28,962 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:52:28,963 INFO L499 BasicCegarLoop]: trace histogram [55, 53, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:52:28,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-04-06 14:52:29,175 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2022-04-06 14:52:29,176 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:52:29,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:52:29,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1777008506, now seen corresponding path program 107 times [2022-04-06 14:52:29,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:52:29,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1975361171] [2022-04-06 14:52:29,190 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:52:29,237 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:52:29,238 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:52:29,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1854693551, now seen corresponding path program 1 times [2022-04-06 14:52:29,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:52:29,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653735748] [2022-04-06 14:52:29,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:52:29,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:52:29,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:52:29,241 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:52:29,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:52:29,243 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:52:29,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1777008506, now seen corresponding path program 108 times [2022-04-06 14:52:29,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:52:29,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394504139] [2022-04-06 14:52:29,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:52:29,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:52:29,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:52:29,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:52:29,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:52:29,914 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 162 proven. 2862 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:52:29,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:52:29,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394504139] [2022-04-06 14:52:29,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394504139] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:52:29,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878504042] [2022-04-06 14:52:29,914 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:52:29,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:52:29,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:52:29,915 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:52:29,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-04-06 14:52:29,956 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 14:52:29,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:52:29,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 14:52:29,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:52:30,144 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 2862 trivial. 0 not checked. [2022-04-06 14:52:30,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:52:30,317 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 2862 trivial. 0 not checked. [2022-04-06 14:52:30,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878504042] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:52:30,318 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:52:30,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 8, 8] total 67 [2022-04-06 14:52:30,318 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:52:30,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1975361171] [2022-04-06 14:52:30,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1975361171] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:52:30,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:52:30,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-04-06 14:52:30,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318638040] [2022-04-06 14:52:30,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:52:30,331 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-04-06 14:52:30,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:52:30,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-04-06 14:52:30,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1582, Invalid=2840, Unknown=0, NotChecked=0, Total=4422 [2022-04-06 14:52:30,332 INFO L87 Difference]: Start difference. First operand 123 states and 126 transitions. Second operand has 57 states, 57 states have (on average 2.0526315789473686) internal successors, (117), 56 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:52:31,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:52:31,425 INFO L93 Difference]: Finished difference Result 134 states and 140 transitions. [2022-04-06 14:52:31,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-04-06 14:52:31,425 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.0526315789473686) internal successors, (117), 56 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 121 [2022-04-06 14:52:31,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:52:31,426 INFO L225 Difference]: With dead ends: 134 [2022-04-06 14:52:31,426 INFO L226 Difference]: Without dead ends: 125 [2022-04-06 14:52:31,427 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 233 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2249 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4660, Invalid=9860, Unknown=0, NotChecked=0, Total=14520 [2022-04-06 14:52:31,428 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 62 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:52:31,428 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 29 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:52:31,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-04-06 14:52:31,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2022-04-06 14:52:31,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.0333333333333334) internal successors, (124), 120 states have internal predecessors, (124), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:52:31,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 128 transitions. [2022-04-06 14:52:31,433 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 128 transitions. Word has length 121 [2022-04-06 14:52:31,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:52:31,433 INFO L478 AbstractCegarLoop]: Abstraction has 125 states and 128 transitions. [2022-04-06 14:52:31,433 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.0526315789473686) internal successors, (117), 56 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:52:31,433 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 128 transitions. [2022-04-06 14:52:31,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-04-06 14:52:31,434 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:52:31,434 INFO L499 BasicCegarLoop]: trace histogram [56, 54, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:52:31,452 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-04-06 14:52:31,651 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,SelfDestructingSolverStorable109,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:52:31,651 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:52:31,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:52:31,651 INFO L85 PathProgramCache]: Analyzing trace with hash -195744745, now seen corresponding path program 109 times [2022-04-06 14:52:31,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:52:31,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1208236755] [2022-04-06 14:52:31,674 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:52:31,734 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:52:31,735 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:52:31,735 INFO L85 PathProgramCache]: Analyzing trace with hash -390741585, now seen corresponding path program 1 times [2022-04-06 14:52:31,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:52:31,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528434929] [2022-04-06 14:52:31,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:52:31,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:52:31,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:52:31,749 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:52:31,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:52:31,752 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:52:31,752 INFO L85 PathProgramCache]: Analyzing trace with hash -195744745, now seen corresponding path program 110 times [2022-04-06 14:52:31,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:52:31,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722977657] [2022-04-06 14:52:31,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:52:31,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:52:31,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:52:32,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:52:32,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:52:32,610 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 165 proven. 2970 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:52:32,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:52:32,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722977657] [2022-04-06 14:52:32,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722977657] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:52:32,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246333210] [2022-04-06 14:52:32,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:52:32,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:52:32,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:52:32,611 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:52:32,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-04-06 14:52:32,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:52:32,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:52:32,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 56 conjunts are in the unsatisfiable core [2022-04-06 14:52:32,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:52:32,776 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 165 proven. 2970 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:52:32,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:52:34,643 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 165 proven. 2970 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:52:34,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246333210] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:52:34,643 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:52:34,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 57, 57] total 114 [2022-04-06 14:52:34,643 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:52:34,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1208236755] [2022-04-06 14:52:34,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1208236755] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:52:34,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:52:34,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-04-06 14:52:34,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860584919] [2022-04-06 14:52:34,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:52:34,644 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-04-06 14:52:34,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:52:34,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-04-06 14:52:34,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2022-04-06 14:52:34,645 INFO L87 Difference]: Start difference. First operand 125 states and 128 transitions. Second operand has 58 states, 58 states have (on average 2.0517241379310347) internal successors, (119), 57 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:52:35,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:52:35,438 INFO L93 Difference]: Finished difference Result 136 states and 142 transitions. [2022-04-06 14:52:35,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-04-06 14:52:35,438 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.0517241379310347) internal successors, (119), 57 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 123 [2022-04-06 14:52:35,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:52:35,439 INFO L225 Difference]: With dead ends: 136 [2022-04-06 14:52:35,439 INFO L226 Difference]: Without dead ends: 127 [2022-04-06 14:52:35,441 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1808 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=12546, Invalid=15846, Unknown=0, NotChecked=0, Total=28392 [2022-04-06 14:52:35,442 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 63 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:52:35,442 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 34 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:52:35,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-04-06 14:52:35,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2022-04-06 14:52:35,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.0327868852459017) internal successors, (126), 122 states have internal predecessors, (126), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:52:35,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 130 transitions. [2022-04-06 14:52:35,447 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 130 transitions. Word has length 123 [2022-04-06 14:52:35,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:52:35,447 INFO L478 AbstractCegarLoop]: Abstraction has 127 states and 130 transitions. [2022-04-06 14:52:35,447 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.0517241379310347) internal successors, (119), 57 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:52:35,447 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 130 transitions. [2022-04-06 14:52:35,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-04-06 14:52:35,448 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:52:35,448 INFO L499 BasicCegarLoop]: trace histogram [57, 55, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:52:35,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-04-06 14:52:35,663 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,SelfDestructingSolverStorable112,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:52:35,663 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:52:35,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:52:35,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1931041420, now seen corresponding path program 111 times [2022-04-06 14:52:35,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:52:35,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1832174112] [2022-04-06 14:52:35,677 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:52:35,702 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:52:35,702 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:52:35,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1658790575, now seen corresponding path program 1 times [2022-04-06 14:52:35,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:52:35,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350422099] [2022-04-06 14:52:35,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:52:35,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:52:35,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:52:35,706 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:52:35,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:52:35,708 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:52:35,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1931041420, now seen corresponding path program 112 times [2022-04-06 14:52:35,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:52:35,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257932068] [2022-04-06 14:52:35,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:52:35,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:52:35,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:52:36,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:52:36,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:52:36,613 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 168 proven. 3080 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:52:36,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:52:36,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257932068] [2022-04-06 14:52:36,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257932068] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:52:36,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832586947] [2022-04-06 14:52:36,614 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:52:36,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:52:36,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:52:36,615 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:52:36,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-04-06 14:52:36,658 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:52:36,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:52:36,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 57 conjunts are in the unsatisfiable core [2022-04-06 14:52:36,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:52:36,824 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 168 proven. 3080 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:52:36,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:52:38,560 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 168 proven. 3080 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:52:38,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832586947] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:52:38,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:52:38,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 58, 58] total 116 [2022-04-06 14:52:38,560 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:52:38,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1832174112] [2022-04-06 14:52:38,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1832174112] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:52:38,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:52:38,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-04-06 14:52:38,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231321189] [2022-04-06 14:52:38,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:52:38,561 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-04-06 14:52:38,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:52:38,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-04-06 14:52:38,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=6783, Unknown=0, NotChecked=0, Total=13340 [2022-04-06 14:52:38,562 INFO L87 Difference]: Start difference. First operand 127 states and 130 transitions. Second operand has 59 states, 59 states have (on average 2.0508474576271185) internal successors, (121), 58 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:52:39,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:52:39,496 INFO L93 Difference]: Finished difference Result 138 states and 144 transitions. [2022-04-06 14:52:39,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-04-06 14:52:39,496 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.0508474576271185) internal successors, (121), 58 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 125 [2022-04-06 14:52:39,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:52:39,497 INFO L225 Difference]: With dead ends: 138 [2022-04-06 14:52:39,497 INFO L226 Difference]: Without dead ends: 129 [2022-04-06 14:52:39,499 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1869 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=12998, Invalid=16414, Unknown=0, NotChecked=0, Total=29412 [2022-04-06 14:52:39,500 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 64 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:52:39,500 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 39 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:52:39,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-04-06 14:52:39,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2022-04-06 14:52:39,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.032258064516129) internal successors, (128), 124 states have internal predecessors, (128), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:52:39,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 132 transitions. [2022-04-06 14:52:39,513 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 132 transitions. Word has length 125 [2022-04-06 14:52:39,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:52:39,513 INFO L478 AbstractCegarLoop]: Abstraction has 129 states and 132 transitions. [2022-04-06 14:52:39,513 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.0508474576271185) internal successors, (121), 58 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:52:39,514 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 132 transitions. [2022-04-06 14:52:39,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-04-06 14:52:39,514 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:52:39,514 INFO L499 BasicCegarLoop]: trace histogram [58, 56, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:52:39,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-04-06 14:52:39,727 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113,SelfDestructingSolverStorable114 [2022-04-06 14:52:39,727 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:52:39,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:52:39,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1191132049, now seen corresponding path program 113 times [2022-04-06 14:52:39,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:52:39,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [785039048] [2022-04-06 14:52:39,743 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:52:39,772 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:52:39,772 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:52:39,772 INFO L85 PathProgramCache]: Analyzing trace with hash -586644561, now seen corresponding path program 1 times [2022-04-06 14:52:39,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:52:39,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599875828] [2022-04-06 14:52:39,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:52:39,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:52:39,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:52:39,776 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:52:39,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:52:39,777 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:52:39,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1191132049, now seen corresponding path program 114 times [2022-04-06 14:52:39,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:52:39,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284529098] [2022-04-06 14:52:39,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:52:39,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:52:39,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:52:40,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:52:40,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:52:40,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 171 proven. 3192 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:52:40,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:52:40,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284529098] [2022-04-06 14:52:40,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284529098] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:52:40,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512023227] [2022-04-06 14:52:40,444 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:52:40,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:52:40,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:52:40,445 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:52:40,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-04-06 14:52:40,470 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 14:52:40,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:52:40,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 14:52:40,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:52:40,759 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 3192 trivial. 0 not checked. [2022-04-06 14:52:40,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:52:40,957 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 3192 trivial. 0 not checked. [2022-04-06 14:52:40,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512023227] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:52:40,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:52:40,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 8, 8] total 70 [2022-04-06 14:52:40,958 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:52:40,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [785039048] [2022-04-06 14:52:40,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [785039048] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:52:40,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:52:40,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-04-06 14:52:40,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665875282] [2022-04-06 14:52:40,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:52:40,958 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-04-06 14:52:40,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:52:40,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-04-06 14:52:40,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1753, Invalid=3077, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 14:52:40,960 INFO L87 Difference]: Start difference. First operand 129 states and 132 transitions. Second operand has 60 states, 60 states have (on average 2.05) internal successors, (123), 59 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:52:42,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:52:42,168 INFO L93 Difference]: Finished difference Result 140 states and 146 transitions. [2022-04-06 14:52:42,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-04-06 14:52:42,168 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.05) internal successors, (123), 59 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 127 [2022-04-06 14:52:42,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:52:42,169 INFO L225 Difference]: With dead ends: 140 [2022-04-06 14:52:42,169 INFO L226 Difference]: Without dead ends: 131 [2022-04-06 14:52:42,170 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 245 SyntacticMatches, 1 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2459 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=5173, Invalid=10829, Unknown=0, NotChecked=0, Total=16002 [2022-04-06 14:52:42,171 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 65 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:52:42,171 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 39 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:52:42,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-04-06 14:52:42,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2022-04-06 14:52:42,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.0317460317460319) internal successors, (130), 126 states have internal predecessors, (130), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:52:42,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 134 transitions. [2022-04-06 14:52:42,176 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 134 transitions. Word has length 127 [2022-04-06 14:52:42,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:52:42,176 INFO L478 AbstractCegarLoop]: Abstraction has 131 states and 134 transitions. [2022-04-06 14:52:42,176 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.05) internal successors, (123), 59 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:52:42,177 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 134 transitions. [2022-04-06 14:52:42,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-04-06 14:52:42,177 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:52:42,177 INFO L499 BasicCegarLoop]: trace histogram [59, 57, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:52:42,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-04-06 14:52:42,383 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115,SelfDestructingSolverStorable116 [2022-04-06 14:52:42,383 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:52:42,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:52:42,384 INFO L85 PathProgramCache]: Analyzing trace with hash -582304146, now seen corresponding path program 115 times [2022-04-06 14:52:42,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:52:42,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [147576895] [2022-04-06 14:52:42,398 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:52:42,427 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:52:42,427 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:52:42,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1462887599, now seen corresponding path program 1 times [2022-04-06 14:52:42,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:52:42,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242865679] [2022-04-06 14:52:42,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:52:42,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:52:42,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:52:42,430 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:52:42,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:52:42,432 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:52:42,432 INFO L85 PathProgramCache]: Analyzing trace with hash -582304146, now seen corresponding path program 116 times [2022-04-06 14:52:42,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:52:42,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121914085] [2022-04-06 14:52:42,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:52:42,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:52:42,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:52:43,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:52:43,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:52:43,204 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 174 proven. 3306 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:52:43,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:52:43,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121914085] [2022-04-06 14:52:43,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121914085] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:52:43,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768040539] [2022-04-06 14:52:43,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:52:43,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:52:43,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:52:43,206 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:52:43,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-04-06 14:52:43,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:52:43,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:52:43,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 59 conjunts are in the unsatisfiable core [2022-04-06 14:52:43,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:52:43,466 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 174 proven. 3306 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:52:43,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:52:45,575 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 174 proven. 3306 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:52:45,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768040539] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:52:45,575 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:52:45,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 60, 60] total 120 [2022-04-06 14:52:45,576 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:52:45,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [147576895] [2022-04-06 14:52:45,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [147576895] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:52:45,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:52:45,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-04-06 14:52:45,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649249709] [2022-04-06 14:52:45,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:52:45,576 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-04-06 14:52:45,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:52:45,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-04-06 14:52:45,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7023, Invalid=7257, Unknown=0, NotChecked=0, Total=14280 [2022-04-06 14:52:45,578 INFO L87 Difference]: Start difference. First operand 131 states and 134 transitions. Second operand has 61 states, 61 states have (on average 2.0491803278688523) internal successors, (125), 60 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:52:46,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:52:46,790 INFO L93 Difference]: Finished difference Result 142 states and 148 transitions. [2022-04-06 14:52:46,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-04-06 14:52:46,791 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.0491803278688523) internal successors, (125), 60 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 129 [2022-04-06 14:52:46,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:52:46,791 INFO L225 Difference]: With dead ends: 142 [2022-04-06 14:52:46,791 INFO L226 Difference]: Without dead ends: 133 [2022-04-06 14:52:46,794 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1994 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=13926, Invalid=17580, Unknown=0, NotChecked=0, Total=31506 [2022-04-06 14:52:46,794 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 66 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:52:46,794 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 34 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:52:46,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-04-06 14:52:46,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2022-04-06 14:52:46,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.03125) internal successors, (132), 128 states have internal predecessors, (132), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:52:46,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 136 transitions. [2022-04-06 14:52:46,799 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 136 transitions. Word has length 129 [2022-04-06 14:52:46,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:52:46,800 INFO L478 AbstractCegarLoop]: Abstraction has 133 states and 136 transitions. [2022-04-06 14:52:46,800 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.0491803278688523) internal successors, (125), 60 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:52:46,800 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 136 transitions. [2022-04-06 14:52:46,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-04-06 14:52:46,800 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:52:46,800 INFO L499 BasicCegarLoop]: trace histogram [60, 58, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:52:46,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-04-06 14:52:47,001 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117,SelfDestructingSolverStorable118 [2022-04-06 14:52:47,001 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:52:47,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:52:47,001 INFO L85 PathProgramCache]: Analyzing trace with hash 247528971, now seen corresponding path program 117 times [2022-04-06 14:52:47,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:52:47,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [373245425] [2022-04-06 14:52:47,019 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:52:47,065 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:52:47,065 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:52:47,066 INFO L85 PathProgramCache]: Analyzing trace with hash -782547537, now seen corresponding path program 1 times [2022-04-06 14:52:47,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:52:47,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982551775] [2022-04-06 14:52:47,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:52:47,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:52:47,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:52:47,068 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:52:47,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:52:47,070 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:52:47,070 INFO L85 PathProgramCache]: Analyzing trace with hash 247528971, now seen corresponding path program 118 times [2022-04-06 14:52:47,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:52:47,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647470936] [2022-04-06 14:52:47,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:52:47,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:52:47,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:52:48,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:52:48,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:52:48,057 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 177 proven. 3422 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:52:48,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:52:48,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647470936] [2022-04-06 14:52:48,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647470936] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:52:48,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207450388] [2022-04-06 14:52:48,057 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:52:48,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:52:48,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:52:48,058 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:52:48,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-04-06 14:52:48,103 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:52:48,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:52:48,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 60 conjunts are in the unsatisfiable core [2022-04-06 14:52:48,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:52:48,265 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 177 proven. 3422 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:52:48,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:52:50,694 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 177 proven. 3422 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:52:50,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207450388] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:52:50,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:52:50,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 61, 61] total 122 [2022-04-06 14:52:50,694 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:52:50,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [373245425] [2022-04-06 14:52:50,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [373245425] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:52:50,694 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:52:50,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-04-06 14:52:50,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536470225] [2022-04-06 14:52:50,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:52:50,695 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-04-06 14:52:50,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:52:50,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-04-06 14:52:50,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7262, Invalid=7500, Unknown=0, NotChecked=0, Total=14762 [2022-04-06 14:52:50,696 INFO L87 Difference]: Start difference. First operand 133 states and 136 transitions. Second operand has 62 states, 62 states have (on average 2.0483870967741935) internal successors, (127), 61 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:52:51,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:52:51,774 INFO L93 Difference]: Finished difference Result 144 states and 150 transitions. [2022-04-06 14:52:51,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-04-06 14:52:51,776 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.0483870967741935) internal successors, (127), 61 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 131 [2022-04-06 14:52:51,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:52:51,778 INFO L225 Difference]: With dead ends: 144 [2022-04-06 14:52:51,778 INFO L226 Difference]: Without dead ends: 135 [2022-04-06 14:52:51,781 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2058 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=14402, Invalid=18178, Unknown=0, NotChecked=0, Total=32580 [2022-04-06 14:52:51,782 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 67 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:52:51,782 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 39 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:52:51,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-04-06 14:52:51,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2022-04-06 14:52:51,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.0307692307692307) internal successors, (134), 130 states have internal predecessors, (134), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:52:51,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 138 transitions. [2022-04-06 14:52:51,799 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 138 transitions. Word has length 131 [2022-04-06 14:52:51,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:52:51,815 INFO L478 AbstractCegarLoop]: Abstraction has 135 states and 138 transitions. [2022-04-06 14:52:51,815 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.0483870967741935) internal successors, (127), 61 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:52:51,815 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 138 transitions. [2022-04-06 14:52:51,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-04-06 14:52:51,816 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:52:51,816 INFO L499 BasicCegarLoop]: trace histogram [61, 59, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:52:51,833 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-04-06 14:52:52,027 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2022-04-06 14:52:52,028 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:52:52,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:52:52,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1146762648, now seen corresponding path program 119 times [2022-04-06 14:52:52,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:52:52,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [168113370] [2022-04-06 14:52:52,053 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:52:52,084 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:52:52,084 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:52:52,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1266984623, now seen corresponding path program 1 times [2022-04-06 14:52:52,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:52:52,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952907625] [2022-04-06 14:52:52,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:52:52,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:52:52,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:52:52,090 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:52:52,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:52:52,094 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:52:52,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1146762648, now seen corresponding path program 120 times [2022-04-06 14:52:52,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:52:52,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78523167] [2022-04-06 14:52:52,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:52:52,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:52:52,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:52:53,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:52:53,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:52:53,052 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 180 proven. 3540 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:52:53,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:52:53,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78523167] [2022-04-06 14:52:53,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78523167] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:52:53,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087207779] [2022-04-06 14:52:53,053 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:52:53,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:52:53,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:52:53,055 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:52:53,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-04-06 14:52:53,089 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 14:52:53,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:52:53,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 14:52:53,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:52:53,373 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 3540 trivial. 0 not checked. [2022-04-06 14:52:53,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:52:53,632 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 3540 trivial. 0 not checked. [2022-04-06 14:52:53,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087207779] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:52:53,633 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:52:53,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 8, 8] total 73 [2022-04-06 14:52:53,633 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:52:53,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [168113370] [2022-04-06 14:52:53,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [168113370] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:52:53,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:52:53,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-04-06 14:52:53,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771766456] [2022-04-06 14:52:53,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:52:53,633 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-04-06 14:52:53,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:52:53,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-04-06 14:52:53,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1933, Invalid=3323, Unknown=0, NotChecked=0, Total=5256 [2022-04-06 14:52:53,635 INFO L87 Difference]: Start difference. First operand 135 states and 138 transitions. Second operand has 63 states, 63 states have (on average 2.0476190476190474) internal successors, (129), 62 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:52:54,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:52:54,949 INFO L93 Difference]: Finished difference Result 146 states and 152 transitions. [2022-04-06 14:52:54,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-04-06 14:52:54,950 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.0476190476190474) internal successors, (129), 62 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 133 [2022-04-06 14:52:54,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:52:54,950 INFO L225 Difference]: With dead ends: 146 [2022-04-06 14:52:54,950 INFO L226 Difference]: Without dead ends: 137 [2022-04-06 14:52:54,952 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 257 SyntacticMatches, 1 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2678 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5713, Invalid=11843, Unknown=0, NotChecked=0, Total=17556 [2022-04-06 14:52:54,952 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 68 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:52:54,952 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 54 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:52:54,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-04-06 14:52:54,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2022-04-06 14:52:54,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.0303030303030303) internal successors, (136), 132 states have internal predecessors, (136), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:52:54,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 140 transitions. [2022-04-06 14:52:54,958 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 140 transitions. Word has length 133 [2022-04-06 14:52:54,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:52:54,958 INFO L478 AbstractCegarLoop]: Abstraction has 137 states and 140 transitions. [2022-04-06 14:52:54,958 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.0476190476190474) internal successors, (129), 62 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:52:54,958 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 140 transitions. [2022-04-06 14:52:54,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-04-06 14:52:54,959 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:52:54,959 INFO L499 BasicCegarLoop]: trace histogram [62, 60, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:52:54,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-04-06 14:52:55,175 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,SelfDestructingSolverStorable122,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:52:55,175 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:52:55,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:52:55,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1031212155, now seen corresponding path program 121 times [2022-04-06 14:52:55,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:52:55,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1750102956] [2022-04-06 14:52:55,188 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:52:55,219 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:52:55,220 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:52:55,220 INFO L85 PathProgramCache]: Analyzing trace with hash -978450513, now seen corresponding path program 1 times [2022-04-06 14:52:55,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:52:55,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817305128] [2022-04-06 14:52:55,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:52:55,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:52:55,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:52:55,223 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:52:55,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:52:55,225 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:52:55,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1031212155, now seen corresponding path program 122 times [2022-04-06 14:52:55,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:52:55,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853451676] [2022-04-06 14:52:55,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:52:55,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:52:55,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:52:56,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:52:56,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:52:56,402 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 183 proven. 3660 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:52:56,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:52:56,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853451676] [2022-04-06 14:52:56,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853451676] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:52:56,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920386349] [2022-04-06 14:52:56,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:52:56,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:52:56,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:52:56,404 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:52:56,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-04-06 14:52:56,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:52:56,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:52:56,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 62 conjunts are in the unsatisfiable core [2022-04-06 14:52:56,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:52:56,573 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 183 proven. 3660 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:52:56,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:52:58,750 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 183 proven. 3660 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:52:58,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920386349] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:52:58,750 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:52:58,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 63, 63] total 126 [2022-04-06 14:52:58,751 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:52:58,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1750102956] [2022-04-06 14:52:58,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1750102956] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:52:58,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:52:58,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-04-06 14:52:58,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656474025] [2022-04-06 14:52:58,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:52:58,752 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-04-06 14:52:58,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:52:58,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-04-06 14:52:58,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7752, Invalid=7998, Unknown=0, NotChecked=0, Total=15750 [2022-04-06 14:52:58,756 INFO L87 Difference]: Start difference. First operand 137 states and 140 transitions. Second operand has 64 states, 64 states have (on average 2.046875) internal successors, (131), 63 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:52:59,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:52:59,743 INFO L93 Difference]: Finished difference Result 148 states and 154 transitions. [2022-04-06 14:52:59,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-04-06 14:52:59,743 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.046875) internal successors, (131), 63 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 135 [2022-04-06 14:52:59,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:52:59,745 INFO L225 Difference]: With dead ends: 148 [2022-04-06 14:52:59,745 INFO L226 Difference]: Without dead ends: 139 [2022-04-06 14:52:59,748 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2189 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=15378, Invalid=19404, Unknown=0, NotChecked=0, Total=34782 [2022-04-06 14:52:59,748 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 69 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:52:59,757 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 49 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:52:59,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-04-06 14:52:59,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2022-04-06 14:52:59,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 134 states have (on average 1.0298507462686568) internal successors, (138), 134 states have internal predecessors, (138), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:52:59,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 142 transitions. [2022-04-06 14:52:59,784 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 142 transitions. Word has length 135 [2022-04-06 14:52:59,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:52:59,784 INFO L478 AbstractCegarLoop]: Abstraction has 139 states and 142 transitions. [2022-04-06 14:52:59,784 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.046875) internal successors, (131), 63 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:52:59,784 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 142 transitions. [2022-04-06 14:52:59,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-04-06 14:52:59,785 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:52:59,785 INFO L499 BasicCegarLoop]: trace histogram [63, 61, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:52:59,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-04-06 14:52:59,995 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123,SelfDestructingSolverStorable124 [2022-04-06 14:52:59,995 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:52:59,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:52:59,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1656338078, now seen corresponding path program 123 times [2022-04-06 14:52:59,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:52:59,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [879771360] [2022-04-06 14:53:00,009 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:53:00,032 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:53:00,032 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:53:00,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1071081647, now seen corresponding path program 1 times [2022-04-06 14:53:00,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:53:00,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982890228] [2022-04-06 14:53:00,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:53:00,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:53:00,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:53:00,037 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:53:00,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:53:00,040 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:53:00,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1656338078, now seen corresponding path program 124 times [2022-04-06 14:53:00,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:53:00,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010130741] [2022-04-06 14:53:00,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:53:00,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:53:00,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:53:01,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:53:01,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:53:01,008 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 186 proven. 3782 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:53:01,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:53:01,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010130741] [2022-04-06 14:53:01,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010130741] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:53:01,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913829629] [2022-04-06 14:53:01,008 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:53:01,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:53:01,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:53:01,009 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:53:01,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-04-06 14:53:01,053 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:53:01,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:53:01,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 63 conjunts are in the unsatisfiable core [2022-04-06 14:53:01,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:53:01,285 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 186 proven. 3782 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:53:01,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:53:03,516 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 186 proven. 3782 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:53:03,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913829629] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:53:03,517 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:53:03,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 64, 64] total 128 [2022-04-06 14:53:03,518 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:53:03,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [879771360] [2022-04-06 14:53:03,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [879771360] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:53:03,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:53:03,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-04-06 14:53:03,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92242875] [2022-04-06 14:53:03,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:53:03,519 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-04-06 14:53:03,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:53:03,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-04-06 14:53:03,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8003, Invalid=8253, Unknown=0, NotChecked=0, Total=16256 [2022-04-06 14:53:03,522 INFO L87 Difference]: Start difference. First operand 139 states and 142 transitions. Second operand has 65 states, 65 states have (on average 2.046153846153846) internal successors, (133), 64 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:53:04,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:53:04,511 INFO L93 Difference]: Finished difference Result 150 states and 156 transitions. [2022-04-06 14:53:04,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-04-06 14:53:04,511 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.046153846153846) internal successors, (133), 64 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 137 [2022-04-06 14:53:04,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:53:04,512 INFO L225 Difference]: With dead ends: 150 [2022-04-06 14:53:04,512 INFO L226 Difference]: Without dead ends: 141 [2022-04-06 14:53:04,513 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2256 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=15878, Invalid=20032, Unknown=0, NotChecked=0, Total=35910 [2022-04-06 14:53:04,514 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 70 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:53:04,514 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 34 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:53:04,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-04-06 14:53:04,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2022-04-06 14:53:04,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 136 states have (on average 1.0294117647058822) internal successors, (140), 136 states have internal predecessors, (140), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:53:04,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 144 transitions. [2022-04-06 14:53:04,519 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 144 transitions. Word has length 137 [2022-04-06 14:53:04,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:53:04,520 INFO L478 AbstractCegarLoop]: Abstraction has 141 states and 144 transitions. [2022-04-06 14:53:04,520 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.046153846153846) internal successors, (133), 64 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:53:04,520 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 144 transitions. [2022-04-06 14:53:04,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-04-06 14:53:04,520 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:53:04,520 INFO L499 BasicCegarLoop]: trace histogram [64, 62, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:53:04,536 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-04-06 14:53:04,725 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126,SelfDestructingSolverStorable125 [2022-04-06 14:53:04,726 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:53:04,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:53:04,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1106928641, now seen corresponding path program 125 times [2022-04-06 14:53:04,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:53:04,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [14042121] [2022-04-06 14:53:04,750 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:53:04,807 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:53:04,807 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:53:04,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1174353489, now seen corresponding path program 1 times [2022-04-06 14:53:04,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:53:04,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489569358] [2022-04-06 14:53:04,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:53:04,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:53:04,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:53:04,821 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:53:04,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:53:04,838 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:53:04,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1106928641, now seen corresponding path program 126 times [2022-04-06 14:53:04,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:53:04,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313590331] [2022-04-06 14:53:04,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:53:04,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:53:04,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:53:05,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:53:05,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:53:05,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 189 proven. 3906 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:53:05,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:53:05,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313590331] [2022-04-06 14:53:05,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313590331] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:53:05,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156348694] [2022-04-06 14:53:05,615 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:53:05,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:53:05,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:53:05,617 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:53:05,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-04-06 14:53:05,642 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 14:53:05,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:53:05,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 14:53:05,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:53:05,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 3906 trivial. 0 not checked. [2022-04-06 14:53:05,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:53:06,244 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 3906 trivial. 0 not checked. [2022-04-06 14:53:06,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156348694] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:53:06,246 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:53:06,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 8, 8] total 76 [2022-04-06 14:53:06,246 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:53:06,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [14042121] [2022-04-06 14:53:06,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [14042121] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:53:06,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:53:06,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-04-06 14:53:06,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010613881] [2022-04-06 14:53:06,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:53:06,246 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-04-06 14:53:06,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:53:06,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-04-06 14:53:06,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2122, Invalid=3578, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 14:53:06,247 INFO L87 Difference]: Start difference. First operand 141 states and 144 transitions. Second operand has 66 states, 66 states have (on average 2.0454545454545454) internal successors, (135), 65 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:53:07,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:53:07,340 INFO L93 Difference]: Finished difference Result 152 states and 158 transitions. [2022-04-06 14:53:07,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-04-06 14:53:07,341 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.0454545454545454) internal successors, (135), 65 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 139 [2022-04-06 14:53:07,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:53:07,341 INFO L225 Difference]: With dead ends: 152 [2022-04-06 14:53:07,341 INFO L226 Difference]: Without dead ends: 143 [2022-04-06 14:53:07,343 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 269 SyntacticMatches, 1 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2906 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=6280, Invalid=12902, Unknown=0, NotChecked=0, Total=19182 [2022-04-06 14:53:07,344 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 71 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:53:07,344 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 34 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:53:07,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-04-06 14:53:07,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2022-04-06 14:53:07,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.0289855072463767) internal successors, (142), 138 states have internal predecessors, (142), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:53:07,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 146 transitions. [2022-04-06 14:53:07,349 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 146 transitions. Word has length 139 [2022-04-06 14:53:07,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:53:07,350 INFO L478 AbstractCegarLoop]: Abstraction has 143 states and 146 transitions. [2022-04-06 14:53:07,350 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.0454545454545454) internal successors, (135), 65 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:53:07,350 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 146 transitions. [2022-04-06 14:53:07,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-04-06 14:53:07,350 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:53:07,350 INFO L499 BasicCegarLoop]: trace histogram [65, 63, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:53:07,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-04-06 14:53:07,566 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127,SelfDestructingSolverStorable128 [2022-04-06 14:53:07,566 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:53:07,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:53:07,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1405437092, now seen corresponding path program 127 times [2022-04-06 14:53:07,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:53:07,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1224318818] [2022-04-06 14:53:07,592 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:53:07,625 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:53:07,625 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:53:07,625 INFO L85 PathProgramCache]: Analyzing trace with hash 875178671, now seen corresponding path program 1 times [2022-04-06 14:53:07,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:53:07,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357312213] [2022-04-06 14:53:07,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:53:07,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:53:07,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:53:07,628 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:53:07,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:53:07,630 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:53:07,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1405437092, now seen corresponding path program 128 times [2022-04-06 14:53:07,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:53:07,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30997530] [2022-04-06 14:53:07,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:53:07,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:53:07,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:53:08,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:53:08,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:53:08,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 192 proven. 4032 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:53:08,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:53:08,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30997530] [2022-04-06 14:53:08,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30997530] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:53:08,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780877392] [2022-04-06 14:53:08,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:53:08,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:53:08,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:53:08,450 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:53:08,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-04-06 14:53:08,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:53:08,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:53:08,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 65 conjunts are in the unsatisfiable core [2022-04-06 14:53:08,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:53:08,668 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 192 proven. 4032 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:53:08,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:53:11,560 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 192 proven. 4032 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:53:11,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780877392] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:53:11,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:53:11,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 66, 66] total 132 [2022-04-06 14:53:11,560 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:53:11,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1224318818] [2022-04-06 14:53:11,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1224318818] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:53:11,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:53:11,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-04-06 14:53:11,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036560378] [2022-04-06 14:53:11,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:53:11,561 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-04-06 14:53:11,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:53:11,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-04-06 14:53:11,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8517, Invalid=8775, Unknown=0, NotChecked=0, Total=17292 [2022-04-06 14:53:11,563 INFO L87 Difference]: Start difference. First operand 143 states and 146 transitions. Second operand has 67 states, 67 states have (on average 2.044776119402985) internal successors, (137), 66 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:53:12,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:53:12,649 INFO L93 Difference]: Finished difference Result 154 states and 160 transitions. [2022-04-06 14:53:12,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-04-06 14:53:12,649 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.044776119402985) internal successors, (137), 66 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 141 [2022-04-06 14:53:12,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:53:12,650 INFO L225 Difference]: With dead ends: 154 [2022-04-06 14:53:12,650 INFO L226 Difference]: Without dead ends: 145 [2022-04-06 14:53:12,652 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2393 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=16902, Invalid=21318, Unknown=0, NotChecked=0, Total=38220 [2022-04-06 14:53:12,653 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 72 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:53:12,654 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 29 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:53:12,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-04-06 14:53:12,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2022-04-06 14:53:12,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.0285714285714285) internal successors, (144), 140 states have internal predecessors, (144), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:53:12,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 148 transitions. [2022-04-06 14:53:12,665 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 148 transitions. Word has length 141 [2022-04-06 14:53:12,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:53:12,665 INFO L478 AbstractCegarLoop]: Abstraction has 145 states and 148 transitions. [2022-04-06 14:53:12,665 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.044776119402985) internal successors, (137), 66 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:53:12,665 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 148 transitions. [2022-04-06 14:53:12,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-04-06 14:53:12,666 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:53:12,666 INFO L499 BasicCegarLoop]: trace histogram [66, 64, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:53:12,683 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-04-06 14:53:12,874 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,SelfDestructingSolverStorable129,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:53:12,874 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:53:12,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:53:12,874 INFO L85 PathProgramCache]: Analyzing trace with hash -509249671, now seen corresponding path program 129 times [2022-04-06 14:53:12,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:53:12,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [486808893] [2022-04-06 14:53:12,912 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:53:12,957 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:53:12,957 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:53:12,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1370256465, now seen corresponding path program 1 times [2022-04-06 14:53:12,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:53:12,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463072179] [2022-04-06 14:53:12,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:53:12,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:53:12,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:53:12,960 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:53:12,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:53:12,964 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:53:12,964 INFO L85 PathProgramCache]: Analyzing trace with hash -509249671, now seen corresponding path program 130 times [2022-04-06 14:53:12,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:53:12,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439063196] [2022-04-06 14:53:12,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:53:12,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:53:12,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:53:13,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:53:13,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:53:13,823 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 195 proven. 4160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:53:13,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:53:13,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439063196] [2022-04-06 14:53:13,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439063196] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:53:13,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085493810] [2022-04-06 14:53:13,824 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:53:13,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:53:13,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:53:13,824 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:53:13,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-04-06 14:53:13,882 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:53:13,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:53:13,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 66 conjunts are in the unsatisfiable core [2022-04-06 14:53:13,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:53:14,034 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 195 proven. 4160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:53:14,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:53:16,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 195 proven. 4160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:53:16,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085493810] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:53:16,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:53:16,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 67, 67] total 134 [2022-04-06 14:53:16,425 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:53:16,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [486808893] [2022-04-06 14:53:16,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [486808893] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:53:16,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:53:16,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-04-06 14:53:16,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971910894] [2022-04-06 14:53:16,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:53:16,426 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-04-06 14:53:16,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:53:16,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-04-06 14:53:16,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8780, Invalid=9042, Unknown=0, NotChecked=0, Total=17822 [2022-04-06 14:53:16,427 INFO L87 Difference]: Start difference. First operand 145 states and 148 transitions. Second operand has 68 states, 68 states have (on average 2.0441176470588234) internal successors, (139), 67 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:53:17,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:53:17,524 INFO L93 Difference]: Finished difference Result 156 states and 162 transitions. [2022-04-06 14:53:17,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-04-06 14:53:17,524 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.0441176470588234) internal successors, (139), 67 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2022-04-06 14:53:17,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:53:17,524 INFO L225 Difference]: With dead ends: 156 [2022-04-06 14:53:17,525 INFO L226 Difference]: Without dead ends: 147 [2022-04-06 14:53:17,526 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2463 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=17426, Invalid=21976, Unknown=0, NotChecked=0, Total=39402 [2022-04-06 14:53:17,527 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 73 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:53:17,527 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 44 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:53:17,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-04-06 14:53:17,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2022-04-06 14:53:17,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.028169014084507) internal successors, (146), 142 states have internal predecessors, (146), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:53:17,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 150 transitions. [2022-04-06 14:53:17,533 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 150 transitions. Word has length 143 [2022-04-06 14:53:17,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:53:17,533 INFO L478 AbstractCegarLoop]: Abstraction has 147 states and 150 transitions. [2022-04-06 14:53:17,533 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.0441176470588234) internal successors, (139), 67 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:53:17,533 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 150 transitions. [2022-04-06 14:53:17,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-04-06 14:53:17,534 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:53:17,534 INFO L499 BasicCegarLoop]: trace histogram [67, 65, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:53:17,550 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-04-06 14:53:17,750 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable131,SelfDestructingSolverStorable132 [2022-04-06 14:53:17,750 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:53:17,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:53:17,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1733402710, now seen corresponding path program 131 times [2022-04-06 14:53:17,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:53:17,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [176707887] [2022-04-06 14:53:17,765 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:53:17,799 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:53:17,799 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:53:17,800 INFO L85 PathProgramCache]: Analyzing trace with hash 679275695, now seen corresponding path program 1 times [2022-04-06 14:53:17,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:53:17,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761786803] [2022-04-06 14:53:17,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:53:17,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:53:17,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:53:17,802 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:53:17,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:53:17,804 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:53:17,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1733402710, now seen corresponding path program 132 times [2022-04-06 14:53:17,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:53:17,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192616990] [2022-04-06 14:53:17,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:53:17,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:53:17,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:53:18,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:53:18,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:53:18,892 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 198 proven. 4290 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:53:18,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:53:18,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192616990] [2022-04-06 14:53:18,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192616990] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:53:18,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838206671] [2022-04-06 14:53:18,893 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:53:18,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:53:18,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:53:18,894 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:53:18,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-04-06 14:53:18,926 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 14:53:18,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:53:18,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 14:53:18,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:53:19,131 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 0 proven. 199 refuted. 0 times theorem prover too weak. 4290 trivial. 0 not checked. [2022-04-06 14:53:19,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:53:19,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 0 proven. 199 refuted. 0 times theorem prover too weak. 4290 trivial. 0 not checked. [2022-04-06 14:53:19,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838206671] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:53:19,346 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:53:19,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 8, 8] total 79 [2022-04-06 14:53:19,346 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:53:19,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [176707887] [2022-04-06 14:53:19,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [176707887] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:53:19,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:53:19,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-04-06 14:53:19,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620512162] [2022-04-06 14:53:19,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:53:19,347 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-04-06 14:53:19,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:53:19,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-04-06 14:53:19,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2320, Invalid=3842, Unknown=0, NotChecked=0, Total=6162 [2022-04-06 14:53:19,348 INFO L87 Difference]: Start difference. First operand 147 states and 150 transitions. Second operand has 69 states, 69 states have (on average 2.0434782608695654) internal successors, (141), 68 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:53:20,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:53:20,599 INFO L93 Difference]: Finished difference Result 158 states and 164 transitions. [2022-04-06 14:53:20,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-04-06 14:53:20,599 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.0434782608695654) internal successors, (141), 68 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 145 [2022-04-06 14:53:20,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:53:20,600 INFO L225 Difference]: With dead ends: 158 [2022-04-06 14:53:20,600 INFO L226 Difference]: Without dead ends: 149 [2022-04-06 14:53:20,602 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 281 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3143 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=6874, Invalid=14006, Unknown=0, NotChecked=0, Total=20880 [2022-04-06 14:53:20,629 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 74 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:53:20,629 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 44 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:53:20,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-04-06 14:53:20,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2022-04-06 14:53:20,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 144 states have (on average 1.0277777777777777) internal successors, (148), 144 states have internal predecessors, (148), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:53:20,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 152 transitions. [2022-04-06 14:53:20,635 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 152 transitions. Word has length 145 [2022-04-06 14:53:20,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:53:20,635 INFO L478 AbstractCegarLoop]: Abstraction has 149 states and 152 transitions. [2022-04-06 14:53:20,635 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.0434782608695654) internal successors, (141), 68 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:53:20,635 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 152 transitions. [2022-04-06 14:53:20,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-04-06 14:53:20,636 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:53:20,636 INFO L499 BasicCegarLoop]: trace histogram [68, 66, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:53:20,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-04-06 14:53:20,851 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133,SelfDestructingSolverStorable134 [2022-04-06 14:53:20,851 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:53:20,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:53:20,852 INFO L85 PathProgramCache]: Analyzing trace with hash 848758259, now seen corresponding path program 133 times [2022-04-06 14:53:20,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:53:20,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1052930268] [2022-04-06 14:53:20,904 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:53:20,930 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:53:20,930 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:53:20,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1566159441, now seen corresponding path program 1 times [2022-04-06 14:53:20,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:53:20,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707633590] [2022-04-06 14:53:20,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:53:20,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:53:20,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:53:20,933 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:53:20,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:53:20,934 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:53:20,934 INFO L85 PathProgramCache]: Analyzing trace with hash 848758259, now seen corresponding path program 134 times [2022-04-06 14:53:20,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:53:20,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143491799] [2022-04-06 14:53:20,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:53:20,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:53:20,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:53:21,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:53:21,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:53:21,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 201 proven. 4422 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:53:21,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:53:21,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143491799] [2022-04-06 14:53:21,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143491799] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:53:21,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168641155] [2022-04-06 14:53:21,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:53:21,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:53:21,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:53:21,855 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:53:21,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-04-06 14:53:21,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:53:21,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:53:21,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 68 conjunts are in the unsatisfiable core [2022-04-06 14:53:21,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:53:22,031 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 201 proven. 4422 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:53:22,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:53:25,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 201 proven. 4422 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:53:25,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168641155] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:53:25,792 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:53:25,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 69, 69] total 138 [2022-04-06 14:53:25,792 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:53:25,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1052930268] [2022-04-06 14:53:25,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1052930268] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:53:25,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:53:25,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-04-06 14:53:25,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504263861] [2022-04-06 14:53:25,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:53:25,793 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-04-06 14:53:25,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:53:25,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-04-06 14:53:25,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9318, Invalid=9588, Unknown=0, NotChecked=0, Total=18906 [2022-04-06 14:53:25,795 INFO L87 Difference]: Start difference. First operand 149 states and 152 transitions. Second operand has 70 states, 70 states have (on average 2.0428571428571427) internal successors, (143), 69 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:53:27,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:53:27,143 INFO L93 Difference]: Finished difference Result 160 states and 166 transitions. [2022-04-06 14:53:27,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-04-06 14:53:27,143 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.0428571428571427) internal successors, (143), 69 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 147 [2022-04-06 14:53:27,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:53:27,144 INFO L225 Difference]: With dead ends: 160 [2022-04-06 14:53:27,144 INFO L226 Difference]: Without dead ends: 151 [2022-04-06 14:53:27,146 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2606 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=18498, Invalid=23322, Unknown=0, NotChecked=0, Total=41820 [2022-04-06 14:53:27,147 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 75 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:53:27,147 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 49 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:53:27,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-04-06 14:53:27,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2022-04-06 14:53:27,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.0273972602739727) internal successors, (150), 146 states have internal predecessors, (150), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:53:27,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 154 transitions. [2022-04-06 14:53:27,153 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 154 transitions. Word has length 147 [2022-04-06 14:53:27,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:53:27,153 INFO L478 AbstractCegarLoop]: Abstraction has 151 states and 154 transitions. [2022-04-06 14:53:27,153 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.0428571428571427) internal successors, (143), 69 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:53:27,153 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 154 transitions. [2022-04-06 14:53:27,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-04-06 14:53:27,154 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:53:27,154 INFO L499 BasicCegarLoop]: trace histogram [69, 67, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:53:27,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-04-06 14:53:27,354 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135,SelfDestructingSolverStorable136 [2022-04-06 14:53:27,354 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:53:27,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:53:27,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1108965456, now seen corresponding path program 135 times [2022-04-06 14:53:27,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:53:27,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1890814852] [2022-04-06 14:53:27,394 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:53:27,427 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:53:27,427 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:53:27,427 INFO L85 PathProgramCache]: Analyzing trace with hash 483372719, now seen corresponding path program 1 times [2022-04-06 14:53:27,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:53:27,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934288011] [2022-04-06 14:53:27,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:53:27,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:53:27,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:53:27,430 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:53:27,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:53:27,431 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:53:27,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1108965456, now seen corresponding path program 136 times [2022-04-06 14:53:27,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:53:27,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067613747] [2022-04-06 14:53:27,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:53:27,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:53:27,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:53:28,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:53:28,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:53:28,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 204 proven. 4556 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:53:28,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:53:28,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067613747] [2022-04-06 14:53:28,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067613747] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:53:28,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137601823] [2022-04-06 14:53:28,866 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:53:28,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:53:28,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:53:28,867 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:53:28,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-04-06 14:53:28,912 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:53:28,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:53:28,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 69 conjunts are in the unsatisfiable core [2022-04-06 14:53:28,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:53:29,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 204 proven. 4556 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:53:29,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:53:33,440 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 204 proven. 4556 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:53:33,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137601823] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:53:33,440 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:53:33,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70, 70] total 140 [2022-04-06 14:53:33,441 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:53:33,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1890814852] [2022-04-06 14:53:33,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1890814852] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:53:33,441 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:53:33,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-04-06 14:53:33,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476992493] [2022-04-06 14:53:33,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:53:33,441 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-04-06 14:53:33,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:53:33,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-04-06 14:53:33,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9593, Invalid=9867, Unknown=0, NotChecked=0, Total=19460 [2022-04-06 14:53:33,443 INFO L87 Difference]: Start difference. First operand 151 states and 154 transitions. Second operand has 71 states, 71 states have (on average 2.0422535211267605) internal successors, (145), 70 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:53:34,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:53:34,829 INFO L93 Difference]: Finished difference Result 162 states and 168 transitions. [2022-04-06 14:53:34,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-04-06 14:53:34,829 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.0422535211267605) internal successors, (145), 70 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 149 [2022-04-06 14:53:34,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:53:34,830 INFO L225 Difference]: With dead ends: 162 [2022-04-06 14:53:34,830 INFO L226 Difference]: Without dead ends: 153 [2022-04-06 14:53:34,832 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2679 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=19046, Invalid=24010, Unknown=0, NotChecked=0, Total=43056 [2022-04-06 14:53:34,833 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 76 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:53:34,833 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 54 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:53:34,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-04-06 14:53:34,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2022-04-06 14:53:34,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 148 states have (on average 1.027027027027027) internal successors, (152), 148 states have internal predecessors, (152), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:53:34,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 156 transitions. [2022-04-06 14:53:34,839 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 156 transitions. Word has length 149 [2022-04-06 14:53:34,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:53:34,839 INFO L478 AbstractCegarLoop]: Abstraction has 153 states and 156 transitions. [2022-04-06 14:53:34,839 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.0422535211267605) internal successors, (145), 70 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:53:34,839 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 156 transitions. [2022-04-06 14:53:34,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-04-06 14:53:34,839 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:53:34,839 INFO L499 BasicCegarLoop]: trace histogram [70, 68, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:53:34,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-04-06 14:53:35,055 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137,SelfDestructingSolverStorable138 [2022-04-06 14:53:35,055 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:53:35,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:53:35,055 INFO L85 PathProgramCache]: Analyzing trace with hash 2059978605, now seen corresponding path program 137 times [2022-04-06 14:53:35,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:53:35,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1666171390] [2022-04-06 14:53:35,070 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:53:35,092 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:53:35,093 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:53:35,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1762062417, now seen corresponding path program 1 times [2022-04-06 14:53:35,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:53:35,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140195913] [2022-04-06 14:53:35,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:53:35,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:53:35,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:53:35,095 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:53:35,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:53:35,097 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:53:35,097 INFO L85 PathProgramCache]: Analyzing trace with hash 2059978605, now seen corresponding path program 138 times [2022-04-06 14:53:35,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:53:35,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372540321] [2022-04-06 14:53:35,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:53:35,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:53:35,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:53:36,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:53:36,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:53:36,282 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 207 proven. 4692 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:53:36,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:53:36,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372540321] [2022-04-06 14:53:36,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372540321] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:53:36,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85937645] [2022-04-06 14:53:36,283 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:53:36,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:53:36,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:53:36,284 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:53:36,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-04-06 14:53:36,310 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 14:53:36,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:53:36,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 14:53:36,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:53:36,534 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 4692 trivial. 0 not checked. [2022-04-06 14:53:36,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:53:36,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 4692 trivial. 0 not checked. [2022-04-06 14:53:36,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85937645] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:53:36,752 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:53:36,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 8, 8] total 82 [2022-04-06 14:53:36,752 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:53:36,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1666171390] [2022-04-06 14:53:36,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1666171390] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:53:36,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:53:36,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-04-06 14:53:36,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839038161] [2022-04-06 14:53:36,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:53:36,753 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-04-06 14:53:36,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:53:36,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-04-06 14:53:36,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2527, Invalid=4115, Unknown=0, NotChecked=0, Total=6642 [2022-04-06 14:53:36,754 INFO L87 Difference]: Start difference. First operand 153 states and 156 transitions. Second operand has 72 states, 72 states have (on average 2.0416666666666665) internal successors, (147), 71 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:53:38,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:53:38,059 INFO L93 Difference]: Finished difference Result 164 states and 170 transitions. [2022-04-06 14:53:38,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-04-06 14:53:38,059 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.0416666666666665) internal successors, (147), 71 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 151 [2022-04-06 14:53:38,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:53:38,066 INFO L225 Difference]: With dead ends: 164 [2022-04-06 14:53:38,066 INFO L226 Difference]: Without dead ends: 155 [2022-04-06 14:53:38,068 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 293 SyntacticMatches, 1 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3389 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=7495, Invalid=15155, Unknown=0, NotChecked=0, Total=22650 [2022-04-06 14:53:38,068 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 77 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:53:38,068 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 49 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:53:38,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-04-06 14:53:38,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2022-04-06 14:53:38,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.0266666666666666) internal successors, (154), 150 states have internal predecessors, (154), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:53:38,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 158 transitions. [2022-04-06 14:53:38,074 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 158 transitions. Word has length 151 [2022-04-06 14:53:38,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:53:38,075 INFO L478 AbstractCegarLoop]: Abstraction has 155 states and 158 transitions. [2022-04-06 14:53:38,075 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.0416666666666665) internal successors, (147), 71 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:53:38,075 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 158 transitions. [2022-04-06 14:53:38,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-04-06 14:53:38,075 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:53:38,075 INFO L499 BasicCegarLoop]: trace histogram [71, 69, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:53:38,090 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-04-06 14:53:38,288 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,SelfDestructingSolverStorable139,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:53:38,289 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:53:38,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:53:38,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1155580746, now seen corresponding path program 139 times [2022-04-06 14:53:38,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:53:38,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1617205522] [2022-04-06 14:53:38,311 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:53:38,345 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:53:38,346 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:53:38,346 INFO L85 PathProgramCache]: Analyzing trace with hash 287469743, now seen corresponding path program 1 times [2022-04-06 14:53:38,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:53:38,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413977226] [2022-04-06 14:53:38,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:53:38,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:53:38,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:53:38,348 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:53:38,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:53:38,351 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:53:38,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1155580746, now seen corresponding path program 140 times [2022-04-06 14:53:38,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:53:38,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827532251] [2022-04-06 14:53:38,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:53:38,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:53:38,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:53:39,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:53:39,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:53:39,742 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 210 proven. 4830 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:53:39,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:53:39,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827532251] [2022-04-06 14:53:39,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827532251] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:53:39,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333419521] [2022-04-06 14:53:39,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:53:39,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:53:39,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:53:39,743 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:53:39,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-04-06 14:53:39,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:53:39,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:53:39,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 71 conjunts are in the unsatisfiable core [2022-04-06 14:53:39,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:53:39,976 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 210 proven. 4830 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:53:39,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:53:42,982 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 210 proven. 4830 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:53:42,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333419521] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:53:42,982 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:53:42,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 72, 72] total 144 [2022-04-06 14:53:42,982 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:53:42,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1617205522] [2022-04-06 14:53:42,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1617205522] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:53:42,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:53:42,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-04-06 14:53:42,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504350925] [2022-04-06 14:53:42,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:53:42,983 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-04-06 14:53:42,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:53:42,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-04-06 14:53:42,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10155, Invalid=10437, Unknown=0, NotChecked=0, Total=20592 [2022-04-06 14:53:42,985 INFO L87 Difference]: Start difference. First operand 155 states and 158 transitions. Second operand has 73 states, 73 states have (on average 2.041095890410959) internal successors, (149), 72 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:53:44,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:53:44,169 INFO L93 Difference]: Finished difference Result 166 states and 172 transitions. [2022-04-06 14:53:44,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-04-06 14:53:44,170 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.041095890410959) internal successors, (149), 72 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 153 [2022-04-06 14:53:44,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:53:44,184 INFO L225 Difference]: With dead ends: 166 [2022-04-06 14:53:44,184 INFO L226 Difference]: Without dead ends: 157 [2022-04-06 14:53:44,186 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2828 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=20166, Invalid=25416, Unknown=0, NotChecked=0, Total=45582 [2022-04-06 14:53:44,187 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 78 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:53:44,187 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 29 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:53:44,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-04-06 14:53:44,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2022-04-06 14:53:44,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 152 states have (on average 1.0263157894736843) internal successors, (156), 152 states have internal predecessors, (156), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:53:44,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 160 transitions. [2022-04-06 14:53:44,193 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 160 transitions. Word has length 153 [2022-04-06 14:53:44,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:53:44,195 INFO L478 AbstractCegarLoop]: Abstraction has 157 states and 160 transitions. [2022-04-06 14:53:44,195 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.041095890410959) internal successors, (149), 72 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:53:44,195 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 160 transitions. [2022-04-06 14:53:44,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-04-06 14:53:44,195 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:53:44,196 INFO L499 BasicCegarLoop]: trace histogram [72, 70, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:53:44,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-04-06 14:53:44,405 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,SelfDestructingSolverStorable142,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:53:44,406 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:53:44,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:53:44,406 INFO L85 PathProgramCache]: Analyzing trace with hash -387367961, now seen corresponding path program 141 times [2022-04-06 14:53:44,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:53:44,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1616141972] [2022-04-06 14:53:44,428 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:53:44,486 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:53:44,486 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:53:44,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1957965393, now seen corresponding path program 1 times [2022-04-06 14:53:44,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:53:44,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942232643] [2022-04-06 14:53:44,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:53:44,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:53:44,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:53:44,489 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:53:44,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:53:44,490 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:53:44,491 INFO L85 PathProgramCache]: Analyzing trace with hash -387367961, now seen corresponding path program 142 times [2022-04-06 14:53:44,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:53:44,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213816267] [2022-04-06 14:53:44,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:53:44,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:53:44,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:53:45,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:53:45,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:53:45,626 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 213 proven. 4970 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:53:45,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:53:45,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213816267] [2022-04-06 14:53:45,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213816267] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:53:45,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545885506] [2022-04-06 14:53:45,627 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:53:45,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:53:45,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:53:45,628 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:53:45,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-04-06 14:53:45,673 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:53:45,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:53:45,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 72 conjunts are in the unsatisfiable core [2022-04-06 14:53:45,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:53:45,937 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 213 proven. 4970 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:53:45,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:53:48,927 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 213 proven. 4970 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:53:48,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545885506] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:53:48,927 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:53:48,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 73, 73] total 146 [2022-04-06 14:53:48,927 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:53:48,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1616141972] [2022-04-06 14:53:48,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1616141972] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:53:48,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:53:48,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-04-06 14:53:48,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471536473] [2022-04-06 14:53:48,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:53:48,928 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-04-06 14:53:48,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:53:48,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-04-06 14:53:48,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10442, Invalid=10728, Unknown=0, NotChecked=0, Total=21170 [2022-04-06 14:53:48,930 INFO L87 Difference]: Start difference. First operand 157 states and 160 transitions. Second operand has 74 states, 74 states have (on average 2.0405405405405403) internal successors, (151), 73 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:53:50,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:53:50,457 INFO L93 Difference]: Finished difference Result 168 states and 174 transitions. [2022-04-06 14:53:50,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-04-06 14:53:50,457 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.0405405405405403) internal successors, (151), 73 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 155 [2022-04-06 14:53:50,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:53:50,458 INFO L225 Difference]: With dead ends: 168 [2022-04-06 14:53:50,458 INFO L226 Difference]: Without dead ends: 159 [2022-04-06 14:53:50,461 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2904 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=20738, Invalid=26134, Unknown=0, NotChecked=0, Total=46872 [2022-04-06 14:53:50,461 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 79 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:53:50,461 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 34 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:53:50,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-04-06 14:53:50,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2022-04-06 14:53:50,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.025974025974026) internal successors, (158), 154 states have internal predecessors, (158), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:53:50,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 162 transitions. [2022-04-06 14:53:50,467 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 162 transitions. Word has length 155 [2022-04-06 14:53:50,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:53:50,467 INFO L478 AbstractCegarLoop]: Abstraction has 159 states and 162 transitions. [2022-04-06 14:53:50,467 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.0405405405405403) internal successors, (151), 73 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:53:50,467 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 162 transitions. [2022-04-06 14:53:50,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-04-06 14:53:50,468 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:53:50,468 INFO L499 BasicCegarLoop]: trace histogram [73, 71, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:53:50,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-04-06 14:53:50,683 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2022-04-06 14:53:50,683 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:53:50,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:53:50,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1397358268, now seen corresponding path program 143 times [2022-04-06 14:53:50,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:53:50,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1721075267] [2022-04-06 14:53:50,694 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:53:50,724 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:53:50,724 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:53:50,724 INFO L85 PathProgramCache]: Analyzing trace with hash 91566767, now seen corresponding path program 1 times [2022-04-06 14:53:50,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:53:50,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666306200] [2022-04-06 14:53:50,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:53:50,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:53:50,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:53:50,726 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:53:50,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:53:50,728 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:53:50,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1397358268, now seen corresponding path program 144 times [2022-04-06 14:53:50,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:53:50,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115704633] [2022-04-06 14:53:50,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:53:50,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:53:50,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:53:52,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:53:52,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:53:52,357 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 216 proven. 5112 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:53:52,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:53:52,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115704633] [2022-04-06 14:53:52,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115704633] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:53:52,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060419346] [2022-04-06 14:53:52,357 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:53:52,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:53:52,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:53:52,358 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:53:52,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-04-06 14:53:52,385 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 14:53:52,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:53:52,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 14:53:52,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:53:52,738 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 5112 trivial. 0 not checked. [2022-04-06 14:53:52,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:53:53,063 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 5112 trivial. 0 not checked. [2022-04-06 14:53:53,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060419346] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:53:53,064 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:53:53,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 8, 8] total 85 [2022-04-06 14:53:53,064 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:53:53,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1721075267] [2022-04-06 14:53:53,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1721075267] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:53:53,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:53:53,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-04-06 14:53:53,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021864367] [2022-04-06 14:53:53,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:53:53,065 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-04-06 14:53:53,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:53:53,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-04-06 14:53:53,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2743, Invalid=4397, Unknown=0, NotChecked=0, Total=7140 [2022-04-06 14:53:53,066 INFO L87 Difference]: Start difference. First operand 159 states and 162 transitions. Second operand has 75 states, 75 states have (on average 2.04) internal successors, (153), 74 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:53:55,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:53:55,123 INFO L93 Difference]: Finished difference Result 170 states and 176 transitions. [2022-04-06 14:53:55,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-04-06 14:53:55,123 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.04) internal successors, (153), 74 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 157 [2022-04-06 14:53:55,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:53:55,124 INFO L225 Difference]: With dead ends: 170 [2022-04-06 14:53:55,124 INFO L226 Difference]: Without dead ends: 161 [2022-04-06 14:53:55,125 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 305 SyntacticMatches, 1 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3644 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=8143, Invalid=16349, Unknown=0, NotChecked=0, Total=24492 [2022-04-06 14:53:55,125 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 80 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:53:55,126 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 44 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:53:55,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-04-06 14:53:55,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2022-04-06 14:53:55,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 156 states have (on average 1.0256410256410255) internal successors, (160), 156 states have internal predecessors, (160), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:53:55,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 164 transitions. [2022-04-06 14:53:55,132 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 164 transitions. Word has length 157 [2022-04-06 14:53:55,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:53:55,132 INFO L478 AbstractCegarLoop]: Abstraction has 161 states and 164 transitions. [2022-04-06 14:53:55,132 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.04) internal successors, (153), 74 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:53:55,132 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 164 transitions. [2022-04-06 14:53:55,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-04-06 14:53:55,132 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:53:55,133 INFO L499 BasicCegarLoop]: trace histogram [74, 72, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:53:55,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-04-06 14:53:55,348 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145,SelfDestructingSolverStorable146 [2022-04-06 14:53:55,348 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:53:55,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:53:55,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1335434399, now seen corresponding path program 145 times [2022-04-06 14:53:55,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:53:55,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [482664439] [2022-04-06 14:53:55,371 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:53:55,404 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:53:55,404 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:53:55,405 INFO L85 PathProgramCache]: Analyzing trace with hash 2141098927, now seen corresponding path program 1 times [2022-04-06 14:53:55,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:53:55,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917831453] [2022-04-06 14:53:55,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:53:55,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:53:55,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:53:55,407 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:53:55,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:53:55,409 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:53:55,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1335434399, now seen corresponding path program 146 times [2022-04-06 14:53:55,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:53:55,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784514665] [2022-04-06 14:53:55,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:53:55,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:53:55,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:53:56,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:53:56,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:53:56,674 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 219 proven. 5256 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:53:56,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:53:56,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784514665] [2022-04-06 14:53:56,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784514665] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:53:56,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513552117] [2022-04-06 14:53:56,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:53:56,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:53:56,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:53:56,675 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:53:56,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-04-06 14:53:56,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:53:56,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:53:56,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 74 conjunts are in the unsatisfiable core [2022-04-06 14:53:56,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:53:56,885 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 219 proven. 5256 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:53:56,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:54:00,311 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 219 proven. 5256 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:54:00,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513552117] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:54:00,311 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:54:00,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 75, 75] total 150 [2022-04-06 14:54:00,312 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:54:00,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [482664439] [2022-04-06 14:54:00,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [482664439] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:54:00,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:54:00,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-04-06 14:54:00,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771961661] [2022-04-06 14:54:00,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:54:00,313 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-04-06 14:54:00,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:54:00,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-04-06 14:54:00,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11028, Invalid=11322, Unknown=0, NotChecked=0, Total=22350 [2022-04-06 14:54:00,315 INFO L87 Difference]: Start difference. First operand 161 states and 164 transitions. Second operand has 76 states, 76 states have (on average 2.039473684210526) internal successors, (155), 75 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:54:01,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:54:01,829 INFO L93 Difference]: Finished difference Result 172 states and 178 transitions. [2022-04-06 14:54:01,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-04-06 14:54:01,830 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.039473684210526) internal successors, (155), 75 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 159 [2022-04-06 14:54:01,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:54:01,830 INFO L225 Difference]: With dead ends: 172 [2022-04-06 14:54:01,830 INFO L226 Difference]: Without dead ends: 163 [2022-04-06 14:54:01,834 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3059 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=21906, Invalid=27600, Unknown=0, NotChecked=0, Total=49506 [2022-04-06 14:54:01,834 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 81 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:54:01,834 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 54 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:54:01,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-04-06 14:54:01,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2022-04-06 14:54:01,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 158 states have (on average 1.0253164556962024) internal successors, (162), 158 states have internal predecessors, (162), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:54:01,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 166 transitions. [2022-04-06 14:54:01,846 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 166 transitions. Word has length 159 [2022-04-06 14:54:01,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:54:01,846 INFO L478 AbstractCegarLoop]: Abstraction has 163 states and 166 transitions. [2022-04-06 14:54:01,846 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.039473684210526) internal successors, (155), 75 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:54:01,846 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 166 transitions. [2022-04-06 14:54:01,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-04-06 14:54:01,847 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:54:01,847 INFO L499 BasicCegarLoop]: trace histogram [75, 73, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:54:01,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-04-06 14:54:02,062 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2022-04-06 14:54:02,062 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:54:02,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:54:02,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1956138434, now seen corresponding path program 147 times [2022-04-06 14:54:02,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:54:02,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [631939260] [2022-04-06 14:54:02,086 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:54:02,120 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:54:02,120 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:54:02,120 INFO L85 PathProgramCache]: Analyzing trace with hash -104336209, now seen corresponding path program 1 times [2022-04-06 14:54:02,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:54:02,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861062962] [2022-04-06 14:54:02,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:54:02,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:54:02,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:54:02,123 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:54:02,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:54:02,124 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:54:02,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1956138434, now seen corresponding path program 148 times [2022-04-06 14:54:02,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:54:02,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704288634] [2022-04-06 14:54:02,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:54:02,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:54:02,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:54:03,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:54:03,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:54:03,292 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 222 proven. 5402 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:54:03,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:54:03,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704288634] [2022-04-06 14:54:03,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704288634] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:54:03,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940258098] [2022-04-06 14:54:03,293 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:54:03,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:54:03,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:54:03,294 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:54:03,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-04-06 14:54:03,340 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:54:03,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:54:03,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 75 conjunts are in the unsatisfiable core [2022-04-06 14:54:03,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:54:03,599 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 222 proven. 5402 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:54:03,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:54:06,657 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 222 proven. 5402 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:54:06,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940258098] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:54:06,657 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:54:06,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 76, 76] total 152 [2022-04-06 14:54:06,657 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:54:06,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [631939260] [2022-04-06 14:54:06,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [631939260] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:54:06,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:54:06,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-04-06 14:54:06,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229225349] [2022-04-06 14:54:06,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:54:06,658 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-04-06 14:54:06,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:54:06,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-04-06 14:54:06,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11327, Invalid=11625, Unknown=0, NotChecked=0, Total=22952 [2022-04-06 14:54:06,660 INFO L87 Difference]: Start difference. First operand 163 states and 166 transitions. Second operand has 77 states, 77 states have (on average 2.038961038961039) internal successors, (157), 76 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:54:07,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:54:07,977 INFO L93 Difference]: Finished difference Result 174 states and 180 transitions. [2022-04-06 14:54:07,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-04-06 14:54:07,977 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.038961038961039) internal successors, (157), 76 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 161 [2022-04-06 14:54:07,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:54:07,977 INFO L225 Difference]: With dead ends: 174 [2022-04-06 14:54:07,977 INFO L226 Difference]: Without dead ends: 165 [2022-04-06 14:54:07,979 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3138 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=22502, Invalid=28348, Unknown=0, NotChecked=0, Total=50850 [2022-04-06 14:54:07,980 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 82 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:54:07,980 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 54 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:54:07,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-04-06 14:54:07,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2022-04-06 14:54:07,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 160 states have (on average 1.025) internal successors, (164), 160 states have internal predecessors, (164), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:54:07,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 168 transitions. [2022-04-06 14:54:07,986 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 168 transitions. Word has length 161 [2022-04-06 14:54:07,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:54:07,986 INFO L478 AbstractCegarLoop]: Abstraction has 165 states and 168 transitions. [2022-04-06 14:54:07,986 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.038961038961039) internal successors, (157), 76 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:54:07,986 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 168 transitions. [2022-04-06 14:54:07,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-04-06 14:54:07,987 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:54:07,987 INFO L499 BasicCegarLoop]: trace histogram [76, 74, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:54:08,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-04-06 14:54:08,208 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,SelfDestructingSolverStorable149,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:54:08,209 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:54:08,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:54:08,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1452261925, now seen corresponding path program 149 times [2022-04-06 14:54:08,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:54:08,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1772121087] [2022-04-06 14:54:08,221 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:54:08,256 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:54:08,256 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:54:08,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1945195951, now seen corresponding path program 1 times [2022-04-06 14:54:08,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:54:08,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626989675] [2022-04-06 14:54:08,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:54:08,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:54:08,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:54:08,259 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:54:08,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:54:08,260 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:54:08,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1452261925, now seen corresponding path program 150 times [2022-04-06 14:54:08,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:54:08,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976834925] [2022-04-06 14:54:08,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:54:08,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:54:08,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:54:09,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:54:09,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:54:09,679 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 225 proven. 5550 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:54:09,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:54:09,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976834925] [2022-04-06 14:54:09,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976834925] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:54:09,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488626035] [2022-04-06 14:54:09,680 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:54:09,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:54:09,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:54:09,681 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:54:09,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-04-06 14:54:09,707 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 14:54:09,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:54:09,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 14:54:09,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:54:09,938 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 0 proven. 226 refuted. 0 times theorem prover too weak. 5550 trivial. 0 not checked. [2022-04-06 14:54:09,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:54:10,168 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 0 proven. 226 refuted. 0 times theorem prover too weak. 5550 trivial. 0 not checked. [2022-04-06 14:54:10,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488626035] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:54:10,168 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:54:10,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 8, 8] total 88 [2022-04-06 14:54:10,168 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:54:10,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1772121087] [2022-04-06 14:54:10,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1772121087] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:54:10,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:54:10,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-04-06 14:54:10,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346490834] [2022-04-06 14:54:10,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:54:10,169 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-04-06 14:54:10,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:54:10,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-04-06 14:54:10,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2968, Invalid=4688, Unknown=0, NotChecked=0, Total=7656 [2022-04-06 14:54:10,170 INFO L87 Difference]: Start difference. First operand 165 states and 168 transitions. Second operand has 78 states, 78 states have (on average 2.0384615384615383) internal successors, (159), 77 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:54:12,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:54:12,024 INFO L93 Difference]: Finished difference Result 176 states and 182 transitions. [2022-04-06 14:54:12,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-04-06 14:54:12,024 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.0384615384615383) internal successors, (159), 77 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 163 [2022-04-06 14:54:12,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:54:12,025 INFO L225 Difference]: With dead ends: 176 [2022-04-06 14:54:12,025 INFO L226 Difference]: Without dead ends: 167 [2022-04-06 14:54:12,026 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 317 SyntacticMatches, 1 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3908 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=8818, Invalid=17588, Unknown=0, NotChecked=0, Total=26406 [2022-04-06 14:54:12,027 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 83 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:54:12,027 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 34 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:54:12,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-04-06 14:54:12,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2022-04-06 14:54:12,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 162 states have (on average 1.0246913580246915) internal successors, (166), 162 states have internal predecessors, (166), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:54:12,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 170 transitions. [2022-04-06 14:54:12,033 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 170 transitions. Word has length 163 [2022-04-06 14:54:12,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:54:12,033 INFO L478 AbstractCegarLoop]: Abstraction has 167 states and 170 transitions. [2022-04-06 14:54:12,033 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.0384615384615383) internal successors, (159), 77 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:54:12,033 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 170 transitions. [2022-04-06 14:54:12,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-04-06 14:54:12,034 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:54:12,034 INFO L499 BasicCegarLoop]: trace histogram [77, 75, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:54:12,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-04-06 14:54:12,238 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable152 [2022-04-06 14:54:12,239 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:54:12,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:54:12,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1736726072, now seen corresponding path program 151 times [2022-04-06 14:54:12,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:54:12,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [765837374] [2022-04-06 14:54:12,261 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:54:12,294 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:54:12,294 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:54:12,295 INFO L85 PathProgramCache]: Analyzing trace with hash -300239185, now seen corresponding path program 1 times [2022-04-06 14:54:12,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:54:12,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272556859] [2022-04-06 14:54:12,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:54:12,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:54:12,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:54:12,300 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:54:12,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:54:12,303 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:54:12,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1736726072, now seen corresponding path program 152 times [2022-04-06 14:54:12,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:54:12,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820389138] [2022-04-06 14:54:12,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:54:12,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:54:12,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:54:13,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:54:13,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:54:13,681 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 228 proven. 5700 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:54:13,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:54:13,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820389138] [2022-04-06 14:54:13,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820389138] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:54:13,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528848173] [2022-04-06 14:54:13,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:54:13,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:54:13,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:54:13,682 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:54:13,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-04-06 14:54:13,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:54:13,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:54:13,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 77 conjunts are in the unsatisfiable core [2022-04-06 14:54:13,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:54:13,874 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 228 proven. 5700 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:54:13,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:54:17,071 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 228 proven. 5700 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:54:17,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528848173] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:54:17,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:54:17,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 78, 78] total 156 [2022-04-06 14:54:17,071 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:54:17,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [765837374] [2022-04-06 14:54:17,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [765837374] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:54:17,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:54:17,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-04-06 14:54:17,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092690655] [2022-04-06 14:54:17,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:54:17,072 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-04-06 14:54:17,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:54:17,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-04-06 14:54:17,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11937, Invalid=12243, Unknown=0, NotChecked=0, Total=24180 [2022-04-06 14:54:17,085 INFO L87 Difference]: Start difference. First operand 167 states and 170 transitions. Second operand has 79 states, 79 states have (on average 2.037974683544304) internal successors, (161), 78 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:54:18,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:54:18,495 INFO L93 Difference]: Finished difference Result 178 states and 184 transitions. [2022-04-06 14:54:18,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-04-06 14:54:18,496 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.037974683544304) internal successors, (161), 78 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 165 [2022-04-06 14:54:18,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:54:18,496 INFO L225 Difference]: With dead ends: 178 [2022-04-06 14:54:18,496 INFO L226 Difference]: Without dead ends: 169 [2022-04-06 14:54:18,502 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3299 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=23718, Invalid=29874, Unknown=0, NotChecked=0, Total=53592 [2022-04-06 14:54:18,502 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 84 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:54:18,502 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 54 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:54:18,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-04-06 14:54:18,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2022-04-06 14:54:18,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 164 states have (on average 1.024390243902439) internal successors, (168), 164 states have internal predecessors, (168), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:54:18,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 172 transitions. [2022-04-06 14:54:18,524 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 172 transitions. Word has length 165 [2022-04-06 14:54:18,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:54:18,525 INFO L478 AbstractCegarLoop]: Abstraction has 169 states and 172 transitions. [2022-04-06 14:54:18,525 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.037974683544304) internal successors, (161), 78 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:54:18,525 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 172 transitions. [2022-04-06 14:54:18,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-04-06 14:54:18,525 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:54:18,525 INFO L499 BasicCegarLoop]: trace histogram [78, 76, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:54:18,542 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-04-06 14:54:18,727 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,SelfDestructingSolverStorable154,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:54:18,727 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:54:18,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:54:18,728 INFO L85 PathProgramCache]: Analyzing trace with hash -252458155, now seen corresponding path program 153 times [2022-04-06 14:54:18,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:54:18,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2102979595] [2022-04-06 14:54:18,744 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:54:18,801 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:54:18,802 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:54:18,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1749292975, now seen corresponding path program 1 times [2022-04-06 14:54:18,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:54:18,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965693445] [2022-04-06 14:54:18,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:54:18,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:54:18,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:54:18,804 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:54:18,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:54:18,806 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:54:18,806 INFO L85 PathProgramCache]: Analyzing trace with hash -252458155, now seen corresponding path program 154 times [2022-04-06 14:54:18,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:54:18,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372380834] [2022-04-06 14:54:18,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:54:18,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:54:18,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:54:20,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:54:20,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:54:20,083 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 231 proven. 5852 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:54:20,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:54:20,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372380834] [2022-04-06 14:54:20,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372380834] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:54:20,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076401216] [2022-04-06 14:54:20,084 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:54:20,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:54:20,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:54:20,085 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:54:20,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-04-06 14:54:20,143 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:54:20,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:54:20,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 78 conjunts are in the unsatisfiable core [2022-04-06 14:54:20,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:54:20,288 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 231 proven. 5852 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:54:20,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:54:23,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 231 proven. 5852 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:54:23,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076401216] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:54:23,737 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:54:23,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 79, 79] total 158 [2022-04-06 14:54:23,738 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:54:23,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2102979595] [2022-04-06 14:54:23,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2102979595] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:54:23,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:54:23,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-04-06 14:54:23,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219022887] [2022-04-06 14:54:23,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:54:23,738 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-04-06 14:54:23,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:54:23,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-04-06 14:54:23,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12248, Invalid=12558, Unknown=0, NotChecked=0, Total=24806 [2022-04-06 14:54:23,740 INFO L87 Difference]: Start difference. First operand 169 states and 172 transitions. Second operand has 80 states, 80 states have (on average 2.0375) internal successors, (163), 79 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:54:25,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:54:25,689 INFO L93 Difference]: Finished difference Result 180 states and 186 transitions. [2022-04-06 14:54:25,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-04-06 14:54:25,690 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.0375) internal successors, (163), 79 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 167 [2022-04-06 14:54:25,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:54:25,690 INFO L225 Difference]: With dead ends: 180 [2022-04-06 14:54:25,691 INFO L226 Difference]: Without dead ends: 171 [2022-04-06 14:54:25,693 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3381 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=24338, Invalid=30652, Unknown=0, NotChecked=0, Total=54990 [2022-04-06 14:54:25,694 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 85 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:54:25,694 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 29 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:54:25,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-04-06 14:54:25,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2022-04-06 14:54:25,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.0240963855421688) internal successors, (170), 166 states have internal predecessors, (170), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:54:25,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 174 transitions. [2022-04-06 14:54:25,700 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 174 transitions. Word has length 167 [2022-04-06 14:54:25,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:54:25,701 INFO L478 AbstractCegarLoop]: Abstraction has 171 states and 174 transitions. [2022-04-06 14:54:25,701 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.0375) internal successors, (163), 79 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:54:25,701 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 174 transitions. [2022-04-06 14:54:25,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-04-06 14:54:25,701 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:54:25,701 INFO L499 BasicCegarLoop]: trace histogram [79, 77, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:54:25,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-04-06 14:54:25,914 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2022-04-06 14:54:25,915 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:54:25,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:54:25,915 INFO L85 PathProgramCache]: Analyzing trace with hash -598053582, now seen corresponding path program 155 times [2022-04-06 14:54:25,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:54:25,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1821148374] [2022-04-06 14:54:25,929 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:54:25,952 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:54:25,952 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:54:25,952 INFO L85 PathProgramCache]: Analyzing trace with hash -496142161, now seen corresponding path program 1 times [2022-04-06 14:54:25,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:54:25,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349662786] [2022-04-06 14:54:25,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:54:25,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:54:25,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:54:25,954 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:54:25,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:54:25,956 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:54:25,956 INFO L85 PathProgramCache]: Analyzing trace with hash -598053582, now seen corresponding path program 156 times [2022-04-06 14:54:25,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:54:25,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803481690] [2022-04-06 14:54:25,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:54:25,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:54:25,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:54:27,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:54:27,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:54:27,187 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 234 proven. 6006 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:54:27,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:54:27,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803481690] [2022-04-06 14:54:27,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803481690] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:54:27,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999979868] [2022-04-06 14:54:27,187 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:54:27,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:54:27,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:54:27,188 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:54:27,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-04-06 14:54:27,226 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 14:54:27,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:54:27,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 14:54:27,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:54:27,601 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 6006 trivial. 0 not checked. [2022-04-06 14:54:27,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:54:27,819 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 6006 trivial. 0 not checked. [2022-04-06 14:54:27,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999979868] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:54:27,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:54:27,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 8, 8] total 91 [2022-04-06 14:54:27,819 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:54:27,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1821148374] [2022-04-06 14:54:27,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1821148374] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:54:27,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:54:27,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-04-06 14:54:27,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239476412] [2022-04-06 14:54:27,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:54:27,820 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-04-06 14:54:27,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:54:27,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-04-06 14:54:27,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3202, Invalid=4988, Unknown=0, NotChecked=0, Total=8190 [2022-04-06 14:54:27,822 INFO L87 Difference]: Start difference. First operand 171 states and 174 transitions. Second operand has 81 states, 81 states have (on average 2.037037037037037) internal successors, (165), 80 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:54:29,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:54:29,420 INFO L93 Difference]: Finished difference Result 182 states and 188 transitions. [2022-04-06 14:54:29,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-04-06 14:54:29,431 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.037037037037037) internal successors, (165), 80 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 169 [2022-04-06 14:54:29,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:54:29,432 INFO L225 Difference]: With dead ends: 182 [2022-04-06 14:54:29,432 INFO L226 Difference]: Without dead ends: 173 [2022-04-06 14:54:29,434 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 329 SyntacticMatches, 1 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4181 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=9520, Invalid=18872, Unknown=0, NotChecked=0, Total=28392 [2022-04-06 14:54:29,434 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 86 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:54:29,434 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 39 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:54:29,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-04-06 14:54:29,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2022-04-06 14:54:29,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 168 states have (on average 1.0238095238095237) internal successors, (172), 168 states have internal predecessors, (172), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:54:29,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 176 transitions. [2022-04-06 14:54:29,441 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 176 transitions. Word has length 169 [2022-04-06 14:54:29,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:54:29,441 INFO L478 AbstractCegarLoop]: Abstraction has 173 states and 176 transitions. [2022-04-06 14:54:29,441 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.037037037037037) internal successors, (165), 80 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:54:29,441 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 176 transitions. [2022-04-06 14:54:29,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-04-06 14:54:29,442 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:54:29,442 INFO L499 BasicCegarLoop]: trace histogram [80, 78, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:54:29,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-04-06 14:54:29,647 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157,SelfDestructingSolverStorable158,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:54:29,648 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:54:29,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:54:29,648 INFO L85 PathProgramCache]: Analyzing trace with hash -2002777137, now seen corresponding path program 157 times [2022-04-06 14:54:29,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:54:29,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [427561943] [2022-04-06 14:54:29,664 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:54:29,696 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:54:29,696 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:54:29,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1553389999, now seen corresponding path program 1 times [2022-04-06 14:54:29,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:54:29,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354807922] [2022-04-06 14:54:29,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:54:29,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:54:29,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:54:29,701 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:54:29,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:54:29,702 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:54:29,702 INFO L85 PathProgramCache]: Analyzing trace with hash -2002777137, now seen corresponding path program 158 times [2022-04-06 14:54:29,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:54:29,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673609851] [2022-04-06 14:54:29,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:54:29,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:54:29,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:54:30,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:54:30,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:54:30,991 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 237 proven. 6162 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:54:30,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:54:30,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673609851] [2022-04-06 14:54:30,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673609851] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:54:30,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018911908] [2022-04-06 14:54:30,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:54:30,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:54:30,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:54:30,992 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:54:30,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-04-06 14:54:31,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:54:31,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:54:31,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 80 conjunts are in the unsatisfiable core [2022-04-06 14:54:31,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:54:31,331 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 237 proven. 6162 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:54:31,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:54:35,425 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 237 proven. 6162 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:54:35,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018911908] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:54:35,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:54:35,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 81, 81] total 162 [2022-04-06 14:54:35,425 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:54:35,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [427561943] [2022-04-06 14:54:35,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [427561943] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:54:35,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:54:35,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-04-06 14:54:35,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984551489] [2022-04-06 14:54:35,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:54:35,426 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-04-06 14:54:35,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:54:35,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-04-06 14:54:35,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12882, Invalid=13200, Unknown=0, NotChecked=0, Total=26082 [2022-04-06 14:54:35,428 INFO L87 Difference]: Start difference. First operand 173 states and 176 transitions. Second operand has 82 states, 82 states have (on average 2.0365853658536586) internal successors, (167), 81 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:54:37,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:54:37,227 INFO L93 Difference]: Finished difference Result 184 states and 190 transitions. [2022-04-06 14:54:37,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-04-06 14:54:37,227 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.0365853658536586) internal successors, (167), 81 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 171 [2022-04-06 14:54:37,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:54:37,228 INFO L225 Difference]: With dead ends: 184 [2022-04-06 14:54:37,228 INFO L226 Difference]: Without dead ends: 175 [2022-04-06 14:54:37,231 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3548 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=25602, Invalid=32238, Unknown=0, NotChecked=0, Total=57840 [2022-04-06 14:54:37,231 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 87 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:54:37,231 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 44 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:54:37,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-04-06 14:54:37,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2022-04-06 14:54:37,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 170 states have (on average 1.0235294117647058) internal successors, (174), 170 states have internal predecessors, (174), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:54:37,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 178 transitions. [2022-04-06 14:54:37,246 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 178 transitions. Word has length 171 [2022-04-06 14:54:37,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:54:37,246 INFO L478 AbstractCegarLoop]: Abstraction has 175 states and 178 transitions. [2022-04-06 14:54:37,247 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.0365853658536586) internal successors, (167), 81 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:54:37,247 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 178 transitions. [2022-04-06 14:54:37,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-04-06 14:54:37,247 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:54:37,247 INFO L499 BasicCegarLoop]: trace histogram [81, 79, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:54:37,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-04-06 14:54:37,463 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160,SelfDestructingSolverStorable159 [2022-04-06 14:54:37,463 INFO L403 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:54:37,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:54:37,464 INFO L85 PathProgramCache]: Analyzing trace with hash 972584748, now seen corresponding path program 159 times [2022-04-06 14:54:37,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:54:37,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [357485206] [2022-04-06 14:54:37,476 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:54:37,510 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:54:37,510 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:54:37,510 INFO L85 PathProgramCache]: Analyzing trace with hash -692045137, now seen corresponding path program 1 times [2022-04-06 14:54:37,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:54:37,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043054765] [2022-04-06 14:54:37,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:54:37,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:54:37,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:54:37,512 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:54:37,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:54:37,514 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:54:37,514 INFO L85 PathProgramCache]: Analyzing trace with hash 972584748, now seen corresponding path program 160 times [2022-04-06 14:54:37,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:54:37,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9298704] [2022-04-06 14:54:37,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:54:37,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:54:37,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:54:38,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:54:38,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:54:38,938 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 240 proven. 6320 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:54:38,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:54:38,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9298704] [2022-04-06 14:54:38,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9298704] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:54:38,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849886530] [2022-04-06 14:54:38,939 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:54:38,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:54:38,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:54:38,940 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:54:38,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-04-06 14:54:39,000 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:54:39,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:54:39,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 81 conjunts are in the unsatisfiable core [2022-04-06 14:54:39,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:54:39,145 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 240 proven. 6320 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:54:39,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:54:42,772 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 240 proven. 6320 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:54:42,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849886530] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:54:42,773 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:54:42,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 82, 82] total 164 [2022-04-06 14:54:42,773 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:54:42,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [357485206] [2022-04-06 14:54:42,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [357485206] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:54:42,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:54:42,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-04-06 14:54:42,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138777098] [2022-04-06 14:54:42,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:54:42,774 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-04-06 14:54:42,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:54:42,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-04-06 14:54:42,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13205, Invalid=13527, Unknown=0, NotChecked=0, Total=26732 [2022-04-06 14:54:42,776 INFO L87 Difference]: Start difference. First operand 175 states and 178 transitions. Second operand has 83 states, 83 states have (on average 2.036144578313253) internal successors, (169), 82 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:54:44,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:54:44,307 INFO L93 Difference]: Finished difference Result 186 states and 192 transitions. [2022-04-06 14:54:44,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-04-06 14:54:44,307 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.036144578313253) internal successors, (169), 82 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 173 [2022-04-06 14:54:44,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:54:44,308 INFO L225 Difference]: With dead ends: 186 [2022-04-06 14:54:44,308 INFO L226 Difference]: Without dead ends: 177 [2022-04-06 14:54:44,311 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 509 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3633 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=26246, Invalid=33046, Unknown=0, NotChecked=0, Total=59292 [2022-04-06 14:54:44,311 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 88 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:54:44,312 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 49 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:54:44,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-04-06 14:54:44,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2022-04-06 14:54:44,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 172 states have (on average 1.0232558139534884) internal successors, (176), 172 states have internal predecessors, (176), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:54:44,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 180 transitions. [2022-04-06 14:54:44,319 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 180 transitions. Word has length 173 [2022-04-06 14:54:44,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:54:44,319 INFO L478 AbstractCegarLoop]: Abstraction has 177 states and 180 transitions. [2022-04-06 14:54:44,319 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.036144578313253) internal successors, (169), 82 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:54:44,319 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 180 transitions. [2022-04-06 14:54:44,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-04-06 14:54:44,319 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:54:44,320 INFO L499 BasicCegarLoop]: trace histogram [82, 80, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:54:44,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-04-06 14:54:44,536 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2022-04-06 14:54:44,536 INFO L403 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:54:44,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:54:44,536 INFO L85 PathProgramCache]: Analyzing trace with hash -152862903, now seen corresponding path program 161 times [2022-04-06 14:54:44,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:54:44,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1499120449] [2022-04-06 14:54:44,556 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:54:44,586 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:54:44,586 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:54:44,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1357487023, now seen corresponding path program 1 times [2022-04-06 14:54:44,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:54:44,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323780262] [2022-04-06 14:54:44,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:54:44,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:54:44,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:54:44,589 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:54:44,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:54:44,591 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:54:44,591 INFO L85 PathProgramCache]: Analyzing trace with hash -152862903, now seen corresponding path program 162 times [2022-04-06 14:54:44,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:54:44,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145284068] [2022-04-06 14:54:44,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:54:44,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:54:44,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:54:45,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:54:45,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:54:45,777 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 243 proven. 6480 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:54:45,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:54:45,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145284068] [2022-04-06 14:54:45,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145284068] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:54:45,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10349059] [2022-04-06 14:54:45,778 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:54:45,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:54:45,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:54:45,779 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:54:45,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-04-06 14:54:45,807 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 14:54:45,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:54:45,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 14:54:45,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:54:46,043 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 0 proven. 244 refuted. 0 times theorem prover too weak. 6480 trivial. 0 not checked. [2022-04-06 14:54:46,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:54:46,265 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 0 proven. 244 refuted. 0 times theorem prover too weak. 6480 trivial. 0 not checked. [2022-04-06 14:54:46,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10349059] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:54:46,266 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:54:46,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 8, 8] total 94 [2022-04-06 14:54:46,266 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:54:46,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1499120449] [2022-04-06 14:54:46,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1499120449] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:54:46,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:54:46,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-04-06 14:54:46,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557580800] [2022-04-06 14:54:46,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:54:46,266 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-04-06 14:54:46,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:54:46,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-04-06 14:54:46,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3445, Invalid=5297, Unknown=0, NotChecked=0, Total=8742 [2022-04-06 14:54:46,268 INFO L87 Difference]: Start difference. First operand 177 states and 180 transitions. Second operand has 84 states, 84 states have (on average 2.0357142857142856) internal successors, (171), 83 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:54:47,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:54:47,996 INFO L93 Difference]: Finished difference Result 188 states and 194 transitions. [2022-04-06 14:54:47,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-04-06 14:54:47,996 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.0357142857142856) internal successors, (171), 83 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 175 [2022-04-06 14:54:47,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:54:47,997 INFO L225 Difference]: With dead ends: 188 [2022-04-06 14:54:47,997 INFO L226 Difference]: Without dead ends: 179 [2022-04-06 14:54:47,999 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 515 GetRequests, 341 SyntacticMatches, 1 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4463 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=10249, Invalid=20201, Unknown=0, NotChecked=0, Total=30450 [2022-04-06 14:54:47,999 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 89 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:54:47,999 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 44 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:54:47,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-04-06 14:54:48,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2022-04-06 14:54:48,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 174 states have (on average 1.0229885057471264) internal successors, (178), 174 states have internal predecessors, (178), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:54:48,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 182 transitions. [2022-04-06 14:54:48,013 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 182 transitions. Word has length 175 [2022-04-06 14:54:48,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:54:48,013 INFO L478 AbstractCegarLoop]: Abstraction has 179 states and 182 transitions. [2022-04-06 14:54:48,013 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.0357142857142856) internal successors, (171), 83 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:54:48,013 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 182 transitions. [2022-04-06 14:54:48,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-04-06 14:54:48,014 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:54:48,014 INFO L499 BasicCegarLoop]: trace histogram [83, 81, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:54:48,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-04-06 14:54:48,223 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,SelfDestructingSolverStorable164,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:54:48,223 INFO L403 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:54:48,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:54:48,224 INFO L85 PathProgramCache]: Analyzing trace with hash 623703078, now seen corresponding path program 163 times [2022-04-06 14:54:48,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:54:48,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1734583769] [2022-04-06 14:54:48,241 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:54:48,272 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:54:48,272 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:54:48,272 INFO L85 PathProgramCache]: Analyzing trace with hash -887948113, now seen corresponding path program 1 times [2022-04-06 14:54:48,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:54:48,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170298046] [2022-04-06 14:54:48,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:54:48,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:54:48,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:54:48,275 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:54:48,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:54:48,276 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:54:48,277 INFO L85 PathProgramCache]: Analyzing trace with hash 623703078, now seen corresponding path program 164 times [2022-04-06 14:54:48,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:54:48,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31667066] [2022-04-06 14:54:48,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:54:48,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:54:48,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:54:49,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:54:49,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:54:49,657 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 246 proven. 6642 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:54:49,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:54:49,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31667066] [2022-04-06 14:54:49,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31667066] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:54:49,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641230097] [2022-04-06 14:54:49,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:54:49,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:54:49,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:54:49,658 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:54:49,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-04-06 14:54:49,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:54:49,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:54:49,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 83 conjunts are in the unsatisfiable core [2022-04-06 14:54:49,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:54:50,005 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 246 proven. 6642 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:54:50,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:54:53,756 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 246 proven. 6642 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:54:53,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641230097] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:54:53,757 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:54:53,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 84, 84] total 168 [2022-04-06 14:54:53,757 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:54:53,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1734583769] [2022-04-06 14:54:53,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1734583769] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:54:53,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:54:53,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-04-06 14:54:53,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816842947] [2022-04-06 14:54:53,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:54:53,757 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-04-06 14:54:53,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:54:53,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-04-06 14:54:53,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13863, Invalid=14193, Unknown=0, NotChecked=0, Total=28056 [2022-04-06 14:54:53,760 INFO L87 Difference]: Start difference. First operand 179 states and 182 transitions. Second operand has 85 states, 85 states have (on average 2.0352941176470587) internal successors, (173), 84 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:54:55,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:54:55,585 INFO L93 Difference]: Finished difference Result 190 states and 196 transitions. [2022-04-06 14:54:55,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-04-06 14:54:55,585 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.0352941176470587) internal successors, (173), 84 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 177 [2022-04-06 14:54:55,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:54:55,586 INFO L225 Difference]: With dead ends: 190 [2022-04-06 14:54:55,586 INFO L226 Difference]: Without dead ends: 181 [2022-04-06 14:54:55,588 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 521 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 248 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3806 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=27558, Invalid=34692, Unknown=0, NotChecked=0, Total=62250 [2022-04-06 14:54:55,588 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 90 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:54:55,588 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 39 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:54:55,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-04-06 14:54:55,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2022-04-06 14:54:55,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.0227272727272727) internal successors, (180), 176 states have internal predecessors, (180), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:54:55,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 184 transitions. [2022-04-06 14:54:55,596 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 184 transitions. Word has length 177 [2022-04-06 14:54:55,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:54:55,596 INFO L478 AbstractCegarLoop]: Abstraction has 181 states and 184 transitions. [2022-04-06 14:54:55,596 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.0352941176470587) internal successors, (173), 84 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:54:55,596 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 184 transitions. [2022-04-06 14:54:55,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-04-06 14:54:55,597 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:54:55,597 INFO L499 BasicCegarLoop]: trace histogram [84, 82, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:54:55,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-04-06 14:54:55,813 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165,SelfDestructingSolverStorable166 [2022-04-06 14:54:55,813 INFO L403 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:54:55,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:54:55,813 INFO L85 PathProgramCache]: Analyzing trace with hash -420698685, now seen corresponding path program 165 times [2022-04-06 14:54:55,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:54:55,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1268617158] [2022-04-06 14:54:55,882 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:54:55,927 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:54:55,927 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:54:55,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1161584047, now seen corresponding path program 1 times [2022-04-06 14:54:55,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:54:55,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071662344] [2022-04-06 14:54:55,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:54:55,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:54:55,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:54:55,930 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:54:55,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:54:55,936 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:54:55,936 INFO L85 PathProgramCache]: Analyzing trace with hash -420698685, now seen corresponding path program 166 times [2022-04-06 14:54:55,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:54:55,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015480243] [2022-04-06 14:54:55,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:54:55,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:54:55,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:54:57,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:54:57,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:54:57,483 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 249 proven. 6806 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:54:57,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:54:57,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015480243] [2022-04-06 14:54:57,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015480243] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:54:57,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163617176] [2022-04-06 14:54:57,483 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:54:57,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:54:57,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:54:57,484 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:54:57,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-04-06 14:54:57,544 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:54:57,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:54:57,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 84 conjunts are in the unsatisfiable core [2022-04-06 14:54:57,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:54:57,714 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 249 proven. 6806 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:54:57,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:55:01,876 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 249 proven. 6806 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:55:01,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163617176] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:55:01,876 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:55:01,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 85, 85] total 170 [2022-04-06 14:55:01,876 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:55:01,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1268617158] [2022-04-06 14:55:01,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1268617158] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:55:01,877 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:55:01,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-04-06 14:55:01,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207821536] [2022-04-06 14:55:01,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:55:01,877 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-04-06 14:55:01,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:55:01,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-04-06 14:55:01,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14198, Invalid=14532, Unknown=0, NotChecked=0, Total=28730 [2022-04-06 14:55:01,880 INFO L87 Difference]: Start difference. First operand 181 states and 184 transitions. Second operand has 86 states, 86 states have (on average 2.0348837209302326) internal successors, (175), 85 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:55:03,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:55:03,531 INFO L93 Difference]: Finished difference Result 192 states and 198 transitions. [2022-04-06 14:55:03,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-04-06 14:55:03,531 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.0348837209302326) internal successors, (175), 85 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 179 [2022-04-06 14:55:03,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:55:03,532 INFO L225 Difference]: With dead ends: 192 [2022-04-06 14:55:03,532 INFO L226 Difference]: Without dead ends: 183 [2022-04-06 14:55:03,535 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3894 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=28226, Invalid=35530, Unknown=0, NotChecked=0, Total=63756 [2022-04-06 14:55:03,535 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 91 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:55:03,535 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 29 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:55:03,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-04-06 14:55:03,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2022-04-06 14:55:03,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 178 states have (on average 1.0224719101123596) internal successors, (182), 178 states have internal predecessors, (182), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:55:03,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 186 transitions. [2022-04-06 14:55:03,549 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 186 transitions. Word has length 179 [2022-04-06 14:55:03,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:55:03,549 INFO L478 AbstractCegarLoop]: Abstraction has 183 states and 186 transitions. [2022-04-06 14:55:03,549 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.0348837209302326) internal successors, (175), 85 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:55:03,550 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 186 transitions. [2022-04-06 14:55:03,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-04-06 14:55:03,550 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:55:03,550 INFO L499 BasicCegarLoop]: trace histogram [85, 83, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:55:03,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-04-06 14:55:03,766 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,SelfDestructingSolverStorable168,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:55:03,766 INFO L403 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:55:03,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:55:03,766 INFO L85 PathProgramCache]: Analyzing trace with hash 931554336, now seen corresponding path program 167 times [2022-04-06 14:55:03,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:55:03,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [873097280] [2022-04-06 14:55:03,779 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:55:03,807 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:55:03,807 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:55:03,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1083851089, now seen corresponding path program 1 times [2022-04-06 14:55:03,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:55:03,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580638021] [2022-04-06 14:55:03,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:55:03,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:55:03,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:55:03,812 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:55:03,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:55:03,814 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:55:03,814 INFO L85 PathProgramCache]: Analyzing trace with hash 931554336, now seen corresponding path program 168 times [2022-04-06 14:55:03,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:55:03,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082627722] [2022-04-06 14:55:03,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:55:03,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:55:03,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:55:05,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:55:05,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:55:05,198 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 252 proven. 6972 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:55:05,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:55:05,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082627722] [2022-04-06 14:55:05,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082627722] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:55:05,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838898611] [2022-04-06 14:55:05,198 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:55:05,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:55:05,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:55:05,203 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:55:05,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-04-06 14:55:05,231 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 14:55:05,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:55:05,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 14:55:05,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:55:05,663 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 6972 trivial. 0 not checked. [2022-04-06 14:55:05,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:55:05,990 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 6972 trivial. 0 not checked. [2022-04-06 14:55:05,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838898611] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:55:05,990 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:55:05,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 8, 8] total 97 [2022-04-06 14:55:05,990 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:55:05,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [873097280] [2022-04-06 14:55:05,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [873097280] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:55:05,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:55:05,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-04-06 14:55:05,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430382568] [2022-04-06 14:55:05,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:55:05,991 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-04-06 14:55:05,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:55:05,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-04-06 14:55:05,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3697, Invalid=5615, Unknown=0, NotChecked=0, Total=9312 [2022-04-06 14:55:05,993 INFO L87 Difference]: Start difference. First operand 183 states and 186 transitions. Second operand has 87 states, 87 states have (on average 2.0344827586206895) internal successors, (177), 86 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:55:08,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:55:08,207 INFO L93 Difference]: Finished difference Result 194 states and 200 transitions. [2022-04-06 14:55:08,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-04-06 14:55:08,207 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.0344827586206895) internal successors, (177), 86 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 181 [2022-04-06 14:55:08,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:55:08,208 INFO L225 Difference]: With dead ends: 194 [2022-04-06 14:55:08,208 INFO L226 Difference]: Without dead ends: 185 [2022-04-06 14:55:08,210 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 533 GetRequests, 353 SyntacticMatches, 1 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4754 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=11005, Invalid=21575, Unknown=0, NotChecked=0, Total=32580 [2022-04-06 14:55:08,210 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 92 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:55:08,210 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 54 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:55:08,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-04-06 14:55:08,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2022-04-06 14:55:08,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 180 states have (on average 1.0222222222222221) internal successors, (184), 180 states have internal predecessors, (184), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:55:08,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 188 transitions. [2022-04-06 14:55:08,217 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 188 transitions. Word has length 181 [2022-04-06 14:55:08,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:55:08,218 INFO L478 AbstractCegarLoop]: Abstraction has 185 states and 188 transitions. [2022-04-06 14:55:08,218 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.0344827586206895) internal successors, (177), 86 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:55:08,218 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 188 transitions. [2022-04-06 14:55:08,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-04-06 14:55:08,218 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:55:08,218 INFO L499 BasicCegarLoop]: trace histogram [86, 84, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:55:08,240 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-04-06 14:55:08,433 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2022-04-06 14:55:08,434 INFO L403 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:55:08,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:55:08,434 INFO L85 PathProgramCache]: Analyzing trace with hash -928383171, now seen corresponding path program 169 times [2022-04-06 14:55:08,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:55:08,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1109671378] [2022-04-06 14:55:08,451 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:55:08,498 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:55:08,498 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:55:08,501 INFO L85 PathProgramCache]: Analyzing trace with hash 965681071, now seen corresponding path program 1 times [2022-04-06 14:55:08,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:55:08,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893187419] [2022-04-06 14:55:08,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:55:08,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:55:08,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:55:08,504 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:55:08,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:55:08,505 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:55:08,506 INFO L85 PathProgramCache]: Analyzing trace with hash -928383171, now seen corresponding path program 170 times [2022-04-06 14:55:08,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:55:08,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732773310] [2022-04-06 14:55:08,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:55:08,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:55:08,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:55:10,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:55:10,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:55:10,183 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 255 proven. 7140 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:55:10,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:55:10,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732773310] [2022-04-06 14:55:10,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732773310] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:55:10,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331098880] [2022-04-06 14:55:10,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:55:10,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:55:10,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:55:10,184 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:55:10,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-04-06 14:55:10,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:55:10,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:55:10,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 86 conjunts are in the unsatisfiable core [2022-04-06 14:55:10,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:55:10,489 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 255 proven. 7140 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:55:10,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:55:14,856 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 255 proven. 7140 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:55:14,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331098880] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:55:14,857 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:55:14,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 87, 87] total 174 [2022-04-06 14:55:14,857 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:55:14,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1109671378] [2022-04-06 14:55:14,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1109671378] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:55:14,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:55:14,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-04-06 14:55:14,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833448885] [2022-04-06 14:55:14,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:55:14,857 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-04-06 14:55:14,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:55:14,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-04-06 14:55:14,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14880, Invalid=15222, Unknown=0, NotChecked=0, Total=30102 [2022-04-06 14:55:14,859 INFO L87 Difference]: Start difference. First operand 185 states and 188 transitions. Second operand has 88 states, 88 states have (on average 2.034090909090909) internal successors, (179), 87 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:55:16,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:55:16,772 INFO L93 Difference]: Finished difference Result 196 states and 202 transitions. [2022-04-06 14:55:16,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-04-06 14:55:16,772 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.034090909090909) internal successors, (179), 87 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 183 [2022-04-06 14:55:16,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:55:16,773 INFO L225 Difference]: With dead ends: 196 [2022-04-06 14:55:16,773 INFO L226 Difference]: Without dead ends: 187 [2022-04-06 14:55:16,775 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4073 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=29586, Invalid=37236, Unknown=0, NotChecked=0, Total=66822 [2022-04-06 14:55:16,775 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 93 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:55:16,775 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 34 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:55:16,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-04-06 14:55:16,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2022-04-06 14:55:16,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 182 states have (on average 1.021978021978022) internal successors, (186), 182 states have internal predecessors, (186), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:55:16,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 190 transitions. [2022-04-06 14:55:16,808 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 190 transitions. Word has length 183 [2022-04-06 14:55:16,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:55:16,808 INFO L478 AbstractCegarLoop]: Abstraction has 187 states and 190 transitions. [2022-04-06 14:55:16,808 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.034090909090909) internal successors, (179), 87 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:55:16,808 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 190 transitions. [2022-04-06 14:55:16,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-04-06 14:55:16,809 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:55:16,809 INFO L499 BasicCegarLoop]: trace histogram [87, 85, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:55:16,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-04-06 14:55:17,009 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,SelfDestructingSolverStorable172,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:55:17,009 INFO L403 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:55:17,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:55:17,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1621932262, now seen corresponding path program 171 times [2022-04-06 14:55:17,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:55:17,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [172176082] [2022-04-06 14:55:17,026 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:55:17,049 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:55:17,050 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:55:17,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1279754065, now seen corresponding path program 1 times [2022-04-06 14:55:17,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:55:17,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742030786] [2022-04-06 14:55:17,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:55:17,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:55:17,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:55:17,052 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:55:17,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:55:17,055 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:55:17,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1621932262, now seen corresponding path program 172 times [2022-04-06 14:55:17,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:55:17,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116726965] [2022-04-06 14:55:17,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:55:17,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:55:17,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:55:18,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:55:18,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:55:18,413 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 258 proven. 7310 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:55:18,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:55:18,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116726965] [2022-04-06 14:55:18,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116726965] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:55:18,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995160926] [2022-04-06 14:55:18,413 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:55:18,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:55:18,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:55:18,415 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:55:18,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-04-06 14:55:18,460 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:55:18,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:55:18,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 87 conjunts are in the unsatisfiable core [2022-04-06 14:55:18,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:55:18,753 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 258 proven. 7310 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:55:18,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:55:23,610 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 258 proven. 7310 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:55:23,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995160926] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:55:23,610 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:55:23,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 88, 88] total 176 [2022-04-06 14:55:23,611 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:55:23,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [172176082] [2022-04-06 14:55:23,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [172176082] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:55:23,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:55:23,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-04-06 14:55:23,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538844806] [2022-04-06 14:55:23,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:55:23,611 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-04-06 14:55:23,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:55:23,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-04-06 14:55:23,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15227, Invalid=15573, Unknown=0, NotChecked=0, Total=30800 [2022-04-06 14:55:23,613 INFO L87 Difference]: Start difference. First operand 187 states and 190 transitions. Second operand has 89 states, 89 states have (on average 2.033707865168539) internal successors, (181), 88 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:55:25,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:55:25,614 INFO L93 Difference]: Finished difference Result 198 states and 204 transitions. [2022-04-06 14:55:25,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-04-06 14:55:25,614 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.033707865168539) internal successors, (181), 88 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 185 [2022-04-06 14:55:25,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:55:25,615 INFO L225 Difference]: With dead ends: 198 [2022-04-06 14:55:25,615 INFO L226 Difference]: Without dead ends: 189 [2022-04-06 14:55:25,618 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 545 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 260 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4164 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=30278, Invalid=38104, Unknown=0, NotChecked=0, Total=68382 [2022-04-06 14:55:25,619 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 94 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:55:25,619 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 79 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:55:25,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-04-06 14:55:25,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2022-04-06 14:55:25,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 184 states have (on average 1.0217391304347827) internal successors, (188), 184 states have internal predecessors, (188), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:55:25,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 192 transitions. [2022-04-06 14:55:25,626 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 192 transitions. Word has length 185 [2022-04-06 14:55:25,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:55:25,626 INFO L478 AbstractCegarLoop]: Abstraction has 189 states and 192 transitions. [2022-04-06 14:55:25,626 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.033707865168539) internal successors, (181), 88 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:55:25,626 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 192 transitions. [2022-04-06 14:55:25,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-04-06 14:55:25,626 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:55:25,626 INFO L499 BasicCegarLoop]: trace histogram [88, 86, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:55:25,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-04-06 14:55:25,842 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,SelfDestructingSolverStorable174,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:55:25,842 INFO L403 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:55:25,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:55:25,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1892289463, now seen corresponding path program 173 times [2022-04-06 14:55:25,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:55:25,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1928649400] [2022-04-06 14:55:25,853 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:55:25,882 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:55:25,882 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:55:25,882 INFO L85 PathProgramCache]: Analyzing trace with hash 769778095, now seen corresponding path program 1 times [2022-04-06 14:55:25,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:55:25,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653306391] [2022-04-06 14:55:25,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:55:25,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:55:25,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:55:25,884 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:55:25,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:55:25,886 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:55:25,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1892289463, now seen corresponding path program 174 times [2022-04-06 14:55:25,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:55:25,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236144046] [2022-04-06 14:55:25,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:55:25,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:55:25,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:55:27,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:55:27,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:55:27,610 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 261 proven. 7482 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:55:27,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:55:27,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236144046] [2022-04-06 14:55:27,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236144046] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:55:27,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842635174] [2022-04-06 14:55:27,610 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:55:27,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:55:27,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:55:27,612 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:55:27,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-04-06 14:55:27,638 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 14:55:27,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:55:27,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 14:55:27,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:55:27,891 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 0 proven. 262 refuted. 0 times theorem prover too weak. 7482 trivial. 0 not checked. [2022-04-06 14:55:27,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:55:28,229 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 0 proven. 262 refuted. 0 times theorem prover too weak. 7482 trivial. 0 not checked. [2022-04-06 14:55:28,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842635174] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:55:28,230 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:55:28,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 8, 8] total 100 [2022-04-06 14:55:28,230 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:55:28,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1928649400] [2022-04-06 14:55:28,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1928649400] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:55:28,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:55:28,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-04-06 14:55:28,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887693809] [2022-04-06 14:55:28,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:55:28,230 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-04-06 14:55:28,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:55:28,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-04-06 14:55:28,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3958, Invalid=5942, Unknown=0, NotChecked=0, Total=9900 [2022-04-06 14:55:28,231 INFO L87 Difference]: Start difference. First operand 189 states and 192 transitions. Second operand has 90 states, 90 states have (on average 2.033333333333333) internal successors, (183), 89 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:55:30,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:55:30,251 INFO L93 Difference]: Finished difference Result 200 states and 206 transitions. [2022-04-06 14:55:30,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-04-06 14:55:30,251 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.033333333333333) internal successors, (183), 89 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 187 [2022-04-06 14:55:30,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:55:30,252 INFO L225 Difference]: With dead ends: 200 [2022-04-06 14:55:30,252 INFO L226 Difference]: Without dead ends: 191 [2022-04-06 14:55:30,253 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 551 GetRequests, 365 SyntacticMatches, 1 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5054 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=11788, Invalid=22994, Unknown=0, NotChecked=0, Total=34782 [2022-04-06 14:55:30,254 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 95 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:55:30,254 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 39 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:55:30,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-04-06 14:55:30,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2022-04-06 14:55:30,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.021505376344086) internal successors, (190), 186 states have internal predecessors, (190), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:55:30,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 194 transitions. [2022-04-06 14:55:30,261 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 194 transitions. Word has length 187 [2022-04-06 14:55:30,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:55:30,261 INFO L478 AbstractCegarLoop]: Abstraction has 191 states and 194 transitions. [2022-04-06 14:55:30,261 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.033333333333333) internal successors, (183), 89 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:55:30,261 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 194 transitions. [2022-04-06 14:55:30,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-04-06 14:55:30,262 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:55:30,262 INFO L499 BasicCegarLoop]: trace histogram [89, 87, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:55:30,277 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-04-06 14:55:30,467 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,SelfDestructingSolverStorable176,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:55:30,467 INFO L403 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:55:30,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:55:30,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1079894764, now seen corresponding path program 175 times [2022-04-06 14:55:30,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:55:30,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1679335352] [2022-04-06 14:55:30,479 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:55:30,502 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:55:30,502 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:55:30,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1475657041, now seen corresponding path program 1 times [2022-04-06 14:55:30,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:55:30,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754507752] [2022-04-06 14:55:30,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:55:30,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:55:30,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:55:30,504 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:55:30,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:55:30,506 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:55:30,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1079894764, now seen corresponding path program 176 times [2022-04-06 14:55:30,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:55:30,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640864054] [2022-04-06 14:55:30,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:55:30,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:55:30,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:55:32,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:55:32,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:55:32,168 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 264 proven. 7656 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:55:32,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:55:32,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640864054] [2022-04-06 14:55:32,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640864054] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:55:32,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196728417] [2022-04-06 14:55:32,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:55:32,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:55:32,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:55:32,169 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:55:32,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-04-06 14:55:32,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:55:32,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:55:32,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 89 conjunts are in the unsatisfiable core [2022-04-06 14:55:32,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:55:32,390 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 264 proven. 7656 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:55:32,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:55:38,566 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 264 proven. 7656 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:55:38,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196728417] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:55:38,566 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:55:38,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 90, 90] total 180 [2022-04-06 14:55:38,567 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:55:38,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1679335352] [2022-04-06 14:55:38,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1679335352] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:55:38,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:55:38,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-04-06 14:55:38,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207877662] [2022-04-06 14:55:38,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:55:38,567 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-04-06 14:55:38,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:55:38,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-04-06 14:55:38,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15933, Invalid=16287, Unknown=0, NotChecked=0, Total=32220 [2022-04-06 14:55:38,570 INFO L87 Difference]: Start difference. First operand 191 states and 194 transitions. Second operand has 91 states, 91 states have (on average 2.032967032967033) internal successors, (185), 90 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:55:40,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:55:40,468 INFO L93 Difference]: Finished difference Result 202 states and 208 transitions. [2022-04-06 14:55:40,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-04-06 14:55:40,468 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.032967032967033) internal successors, (185), 90 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 189 [2022-04-06 14:55:40,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:55:40,469 INFO L225 Difference]: With dead ends: 202 [2022-04-06 14:55:40,469 INFO L226 Difference]: Without dead ends: 193 [2022-04-06 14:55:40,471 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 557 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 266 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4349 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=31686, Invalid=39870, Unknown=0, NotChecked=0, Total=71556 [2022-04-06 14:55:40,471 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 96 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:55:40,471 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 29 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:55:40,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-04-06 14:55:40,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2022-04-06 14:55:40,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.0212765957446808) internal successors, (192), 188 states have internal predecessors, (192), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:55:40,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 196 transitions. [2022-04-06 14:55:40,482 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 196 transitions. Word has length 189 [2022-04-06 14:55:40,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:55:40,482 INFO L478 AbstractCegarLoop]: Abstraction has 193 states and 196 transitions. [2022-04-06 14:55:40,482 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.032967032967033) internal successors, (185), 90 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:55:40,482 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 196 transitions. [2022-04-06 14:55:40,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-04-06 14:55:40,483 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:55:40,483 INFO L499 BasicCegarLoop]: trace histogram [90, 88, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:55:40,500 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-04-06 14:55:40,687 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177,SelfDestructingSolverStorable178 [2022-04-06 14:55:40,687 INFO L403 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:55:40,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:55:40,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1195685071, now seen corresponding path program 177 times [2022-04-06 14:55:40,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:55:40,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [641130469] [2022-04-06 14:55:40,711 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:55:40,759 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:55:40,759 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:55:40,760 INFO L85 PathProgramCache]: Analyzing trace with hash 573875119, now seen corresponding path program 1 times [2022-04-06 14:55:40,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:55:40,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565714546] [2022-04-06 14:55:40,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:55:40,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:55:40,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:55:40,762 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:55:40,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:55:40,763 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:55:40,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1195685071, now seen corresponding path program 178 times [2022-04-06 14:55:40,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:55:40,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495427819] [2022-04-06 14:55:40,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:55:40,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:55:40,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:55:42,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:55:42,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:55:42,439 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 267 proven. 7832 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:55:42,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:55:42,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495427819] [2022-04-06 14:55:42,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495427819] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:55:42,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401858679] [2022-04-06 14:55:42,439 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:55:42,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:55:42,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:55:42,440 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:55:42,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-04-06 14:55:42,493 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:55:42,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:55:42,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 90 conjunts are in the unsatisfiable core [2022-04-06 14:55:42,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:55:42,652 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 267 proven. 7832 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:55:42,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:55:47,355 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 267 proven. 7832 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:55:47,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401858679] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:55:47,356 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:55:47,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 91, 91] total 182 [2022-04-06 14:55:47,356 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:55:47,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [641130469] [2022-04-06 14:55:47,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [641130469] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:55:47,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:55:47,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-04-06 14:55:47,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975102044] [2022-04-06 14:55:47,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:55:47,357 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-04-06 14:55:47,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:55:47,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-04-06 14:55:47,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16292, Invalid=16650, Unknown=0, NotChecked=0, Total=32942 [2022-04-06 14:55:47,359 INFO L87 Difference]: Start difference. First operand 193 states and 196 transitions. Second operand has 92 states, 92 states have (on average 2.032608695652174) internal successors, (187), 91 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:55:49,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:55:49,237 INFO L93 Difference]: Finished difference Result 204 states and 210 transitions. [2022-04-06 14:55:49,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-04-06 14:55:49,238 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.032608695652174) internal successors, (187), 91 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 191 [2022-04-06 14:55:49,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:55:49,238 INFO L225 Difference]: With dead ends: 204 [2022-04-06 14:55:49,238 INFO L226 Difference]: Without dead ends: 195 [2022-04-06 14:55:49,240 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4443 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=32402, Invalid=40768, Unknown=0, NotChecked=0, Total=73170 [2022-04-06 14:55:49,241 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 97 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:55:49,241 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 39 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:55:49,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-04-06 14:55:49,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2022-04-06 14:55:49,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 190 states have (on average 1.0210526315789474) internal successors, (194), 190 states have internal predecessors, (194), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:55:49,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 198 transitions. [2022-04-06 14:55:49,248 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 198 transitions. Word has length 191 [2022-04-06 14:55:49,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:55:49,248 INFO L478 AbstractCegarLoop]: Abstraction has 195 states and 198 transitions. [2022-04-06 14:55:49,249 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.032608695652174) internal successors, (187), 91 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:55:49,249 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 198 transitions. [2022-04-06 14:55:49,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-04-06 14:55:49,249 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:55:49,249 INFO L499 BasicCegarLoop]: trace histogram [91, 89, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:55:49,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-04-06 14:55:49,465 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable180,SelfDestructingSolverStorable179 [2022-04-06 14:55:49,465 INFO L403 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:55:49,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:55:49,466 INFO L85 PathProgramCache]: Analyzing trace with hash -801020402, now seen corresponding path program 179 times [2022-04-06 14:55:49,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:55:49,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1395223878] [2022-04-06 14:55:49,476 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:55:49,499 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:55:49,500 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:55:49,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1671560017, now seen corresponding path program 1 times [2022-04-06 14:55:49,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:55:49,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063019633] [2022-04-06 14:55:49,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:55:49,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:55:49,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:55:49,505 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:55:49,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:55:49,507 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:55:49,507 INFO L85 PathProgramCache]: Analyzing trace with hash -801020402, now seen corresponding path program 180 times [2022-04-06 14:55:49,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:55:49,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878722826] [2022-04-06 14:55:49,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:55:49,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:55:49,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:55:51,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:55:51,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:55:51,073 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 270 proven. 8010 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:55:51,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:55:51,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878722826] [2022-04-06 14:55:51,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878722826] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:55:51,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611195106] [2022-04-06 14:55:51,073 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:55:51,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:55:51,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:55:51,074 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:55:51,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-04-06 14:55:51,111 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 14:55:51,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:55:51,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 14:55:51,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:55:51,581 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 0 proven. 271 refuted. 0 times theorem prover too weak. 8010 trivial. 0 not checked. [2022-04-06 14:55:51,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:55:52,004 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 0 proven. 271 refuted. 0 times theorem prover too weak. 8010 trivial. 0 not checked. [2022-04-06 14:55:52,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611195106] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:55:52,004 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:55:52,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 8, 8] total 103 [2022-04-06 14:55:52,004 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:55:52,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1395223878] [2022-04-06 14:55:52,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1395223878] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:55:52,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:55:52,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-04-06 14:55:52,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968752612] [2022-04-06 14:55:52,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:55:52,005 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-04-06 14:55:52,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:55:52,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-04-06 14:55:52,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4228, Invalid=6278, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 14:55:52,006 INFO L87 Difference]: Start difference. First operand 195 states and 198 transitions. Second operand has 93 states, 93 states have (on average 2.032258064516129) internal successors, (189), 92 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:55:54,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:55:54,119 INFO L93 Difference]: Finished difference Result 206 states and 212 transitions. [2022-04-06 14:55:54,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-04-06 14:55:54,119 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.032258064516129) internal successors, (189), 92 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 193 [2022-04-06 14:55:54,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:55:54,120 INFO L225 Difference]: With dead ends: 206 [2022-04-06 14:55:54,120 INFO L226 Difference]: Without dead ends: 197 [2022-04-06 14:55:54,122 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 569 GetRequests, 377 SyntacticMatches, 1 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5363 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=12598, Invalid=24458, Unknown=0, NotChecked=0, Total=37056 [2022-04-06 14:55:54,122 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 98 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:55:54,122 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 34 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:55:54,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-04-06 14:55:54,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2022-04-06 14:55:54,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 192 states have (on average 1.0208333333333333) internal successors, (196), 192 states have internal predecessors, (196), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:55:54,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 200 transitions. [2022-04-06 14:55:54,147 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 200 transitions. Word has length 193 [2022-04-06 14:55:54,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:55:54,147 INFO L478 AbstractCegarLoop]: Abstraction has 197 states and 200 transitions. [2022-04-06 14:55:54,147 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 2.032258064516129) internal successors, (189), 92 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:55:54,147 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 200 transitions. [2022-04-06 14:55:54,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-04-06 14:55:54,148 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:55:54,148 INFO L499 BasicCegarLoop]: trace histogram [92, 90, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:55:54,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-04-06 14:55:54,363 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,SelfDestructingSolverStorable182,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:55:54,363 INFO L403 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:55:54,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:55:54,363 INFO L85 PathProgramCache]: Analyzing trace with hash 514604459, now seen corresponding path program 181 times [2022-04-06 14:55:54,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:55:54,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [340402385] [2022-04-06 14:55:54,378 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:55:54,414 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:55:54,414 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:55:54,414 INFO L85 PathProgramCache]: Analyzing trace with hash 377972143, now seen corresponding path program 1 times [2022-04-06 14:55:54,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:55:54,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832191538] [2022-04-06 14:55:54,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:55:54,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:55:54,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:55:54,416 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:55:54,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:55:54,418 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:55:54,418 INFO L85 PathProgramCache]: Analyzing trace with hash 514604459, now seen corresponding path program 182 times [2022-04-06 14:55:54,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:55:54,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757241724] [2022-04-06 14:55:54,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:55:54,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:55:54,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:55:56,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:55:56,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:55:56,525 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 273 proven. 8190 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:55:56,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:55:56,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757241724] [2022-04-06 14:55:56,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757241724] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:55:56,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656285122] [2022-04-06 14:55:56,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:55:56,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:55:56,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:55:56,527 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:55:56,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-04-06 14:55:56,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:55:56,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:55:56,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 92 conjunts are in the unsatisfiable core [2022-04-06 14:55:56,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:55:56,781 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 273 proven. 8190 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:55:56,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:56:01,496 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 273 proven. 8190 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:56:01,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656285122] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:56:01,496 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:56:01,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 93, 93] total 186 [2022-04-06 14:56:01,496 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:56:01,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [340402385] [2022-04-06 14:56:01,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [340402385] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:56:01,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:56:01,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-04-06 14:56:01,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014632275] [2022-04-06 14:56:01,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:56:01,497 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-04-06 14:56:01,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:56:01,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-04-06 14:56:01,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17022, Invalid=17388, Unknown=0, NotChecked=0, Total=34410 [2022-04-06 14:56:01,500 INFO L87 Difference]: Start difference. First operand 197 states and 200 transitions. Second operand has 94 states, 94 states have (on average 2.0319148936170213) internal successors, (191), 93 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:56:03,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:56:03,508 INFO L93 Difference]: Finished difference Result 208 states and 214 transitions. [2022-04-06 14:56:03,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-04-06 14:56:03,508 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.0319148936170213) internal successors, (191), 93 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 195 [2022-04-06 14:56:03,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:56:03,509 INFO L225 Difference]: With dead ends: 208 [2022-04-06 14:56:03,509 INFO L226 Difference]: Without dead ends: 199 [2022-04-06 14:56:03,513 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 575 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4634 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=33858, Invalid=42594, Unknown=0, NotChecked=0, Total=76452 [2022-04-06 14:56:03,513 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 99 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:56:03,513 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 39 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:56:03,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-04-06 14:56:03,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2022-04-06 14:56:03,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 194 states have (on average 1.0206185567010309) internal successors, (198), 194 states have internal predecessors, (198), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:56:03,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 202 transitions. [2022-04-06 14:56:03,520 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 202 transitions. Word has length 195 [2022-04-06 14:56:03,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:56:03,521 INFO L478 AbstractCegarLoop]: Abstraction has 199 states and 202 transitions. [2022-04-06 14:56:03,521 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.0319148936170213) internal successors, (191), 93 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:56:03,521 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 202 transitions. [2022-04-06 14:56:03,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-04-06 14:56:03,521 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:56:03,521 INFO L499 BasicCegarLoop]: trace histogram [93, 91, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:56:03,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-04-06 14:56:03,727 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,SelfDestructingSolverStorable183,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:56:03,727 INFO L403 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:56:03,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:56:03,728 INFO L85 PathProgramCache]: Analyzing trace with hash 2109710856, now seen corresponding path program 183 times [2022-04-06 14:56:03,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:56:03,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1265581909] [2022-04-06 14:56:03,750 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:56:03,783 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:56:03,783 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:56:03,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1867462993, now seen corresponding path program 1 times [2022-04-06 14:56:03,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:56:03,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032447429] [2022-04-06 14:56:03,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:56:03,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:56:03,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:56:03,786 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:56:03,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:56:03,788 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:56:03,788 INFO L85 PathProgramCache]: Analyzing trace with hash 2109710856, now seen corresponding path program 184 times [2022-04-06 14:56:03,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:56:03,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208791121] [2022-04-06 14:56:03,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:56:03,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:56:03,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:56:05,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:56:05,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:56:05,952 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 276 proven. 8372 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:56:05,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:56:05,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208791121] [2022-04-06 14:56:05,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208791121] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:56:05,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021192432] [2022-04-06 14:56:05,952 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:56:05,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:56:05,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:56:05,953 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:56:05,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-04-06 14:56:06,005 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:56:06,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:56:06,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 93 conjunts are in the unsatisfiable core [2022-04-06 14:56:06,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:56:06,294 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 276 proven. 8372 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:56:06,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:56:11,600 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 276 proven. 8372 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:56:11,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021192432] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:56:11,600 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:56:11,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 94, 94] total 188 [2022-04-06 14:56:11,600 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:56:11,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1265581909] [2022-04-06 14:56:11,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1265581909] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:56:11,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:56:11,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-04-06 14:56:11,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99704343] [2022-04-06 14:56:11,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:56:11,601 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-04-06 14:56:11,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:56:11,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-04-06 14:56:11,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17393, Invalid=17763, Unknown=0, NotChecked=0, Total=35156 [2022-04-06 14:56:11,604 INFO L87 Difference]: Start difference. First operand 199 states and 202 transitions. Second operand has 95 states, 95 states have (on average 2.031578947368421) internal successors, (193), 94 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:56:13,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:56:13,915 INFO L93 Difference]: Finished difference Result 210 states and 216 transitions. [2022-04-06 14:56:13,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-04-06 14:56:13,915 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.031578947368421) internal successors, (193), 94 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 197 [2022-04-06 14:56:13,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:56:13,916 INFO L225 Difference]: With dead ends: 210 [2022-04-06 14:56:13,916 INFO L226 Difference]: Without dead ends: 201 [2022-04-06 14:56:13,918 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 581 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 278 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4731 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=34598, Invalid=43522, Unknown=0, NotChecked=0, Total=78120 [2022-04-06 14:56:13,918 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 100 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:56:13,918 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 39 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:56:13,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-04-06 14:56:13,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2022-04-06 14:56:13,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 196 states have (on average 1.0204081632653061) internal successors, (200), 196 states have internal predecessors, (200), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:56:13,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 204 transitions. [2022-04-06 14:56:13,926 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 204 transitions. Word has length 197 [2022-04-06 14:56:13,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:56:13,926 INFO L478 AbstractCegarLoop]: Abstraction has 201 states and 204 transitions. [2022-04-06 14:56:13,926 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.031578947368421) internal successors, (193), 94 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:56:13,926 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 204 transitions. [2022-04-06 14:56:13,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-04-06 14:56:13,927 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:56:13,927 INFO L499 BasicCegarLoop]: trace histogram [94, 92, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:56:13,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-04-06 14:56:14,140 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,SelfDestructingSolverStorable186,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:56:14,141 INFO L403 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:56:14,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:56:14,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1703633701, now seen corresponding path program 185 times [2022-04-06 14:56:14,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:56:14,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [742900142] [2022-04-06 14:56:14,152 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:56:14,180 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:56:14,181 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:56:14,181 INFO L85 PathProgramCache]: Analyzing trace with hash 182069167, now seen corresponding path program 1 times [2022-04-06 14:56:14,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:56:14,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100560815] [2022-04-06 14:56:14,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:56:14,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:56:14,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:56:14,183 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:56:14,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:56:14,185 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:56:14,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1703633701, now seen corresponding path program 186 times [2022-04-06 14:56:14,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:56:14,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112664826] [2022-04-06 14:56:14,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:56:14,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:56:14,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:56:16,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:56:16,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:56:16,336 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 279 proven. 8556 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:56:16,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:56:16,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112664826] [2022-04-06 14:56:16,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112664826] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:56:16,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630653629] [2022-04-06 14:56:16,337 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:56:16,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:56:16,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:56:16,338 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:56:16,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-04-06 14:56:16,361 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 14:56:16,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:56:16,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 14:56:16,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:56:16,631 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 280 refuted. 0 times theorem prover too weak. 8556 trivial. 0 not checked. [2022-04-06 14:56:16,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:56:16,895 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 280 refuted. 0 times theorem prover too weak. 8556 trivial. 0 not checked. [2022-04-06 14:56:16,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630653629] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:56:16,896 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:56:16,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 8, 8] total 106 [2022-04-06 14:56:16,896 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:56:16,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [742900142] [2022-04-06 14:56:16,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [742900142] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:56:16,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:56:16,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-04-06 14:56:16,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021193567] [2022-04-06 14:56:16,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:56:16,897 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-04-06 14:56:16,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:56:16,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-04-06 14:56:16,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4507, Invalid=6623, Unknown=0, NotChecked=0, Total=11130 [2022-04-06 14:56:16,898 INFO L87 Difference]: Start difference. First operand 201 states and 204 transitions. Second operand has 96 states, 96 states have (on average 2.03125) internal successors, (195), 95 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:56:19,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:56:19,304 INFO L93 Difference]: Finished difference Result 212 states and 218 transitions. [2022-04-06 14:56:19,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-04-06 14:56:19,304 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.03125) internal successors, (195), 95 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 199 [2022-04-06 14:56:19,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:56:19,305 INFO L225 Difference]: With dead ends: 212 [2022-04-06 14:56:19,305 INFO L226 Difference]: Without dead ends: 203 [2022-04-06 14:56:19,307 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 587 GetRequests, 389 SyntacticMatches, 1 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5681 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=13435, Invalid=25967, Unknown=0, NotChecked=0, Total=39402 [2022-04-06 14:56:19,308 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 101 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:56:19,308 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 34 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:56:19,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-04-06 14:56:19,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2022-04-06 14:56:19,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 198 states have (on average 1.02020202020202) internal successors, (202), 198 states have internal predecessors, (202), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:56:19,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 206 transitions. [2022-04-06 14:56:19,332 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 206 transitions. Word has length 199 [2022-04-06 14:56:19,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:56:19,332 INFO L478 AbstractCegarLoop]: Abstraction has 203 states and 206 transitions. [2022-04-06 14:56:19,332 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.03125) internal successors, (195), 95 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:56:19,332 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 206 transitions. [2022-04-06 14:56:19,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-04-06 14:56:19,333 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:56:19,333 INFO L499 BasicCegarLoop]: trace histogram [95, 93, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:56:19,348 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-04-06 14:56:19,536 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2022-04-06 14:56:19,536 INFO L403 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:56:19,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:56:19,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1989455614, now seen corresponding path program 187 times [2022-04-06 14:56:19,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:56:19,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1009413016] [2022-04-06 14:56:19,553 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:56:19,590 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:56:19,590 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:56:19,590 INFO L85 PathProgramCache]: Analyzing trace with hash -2063365969, now seen corresponding path program 1 times [2022-04-06 14:56:19,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:56:19,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752006935] [2022-04-06 14:56:19,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:56:19,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:56:19,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:56:19,594 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:56:19,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:56:19,595 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:56:19,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1989455614, now seen corresponding path program 188 times [2022-04-06 14:56:19,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:56:19,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105203635] [2022-04-06 14:56:19,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:56:19,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:56:19,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:56:21,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:56:21,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:56:21,371 INFO L134 CoverageAnalysis]: Checked inductivity of 9025 backedges. 282 proven. 8742 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:56:21,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:56:21,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105203635] [2022-04-06 14:56:21,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105203635] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:56:21,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153033539] [2022-04-06 14:56:21,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:56:21,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:56:21,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:56:21,372 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:56:21,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-04-06 14:56:21,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:56:21,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:56:21,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 95 conjunts are in the unsatisfiable core [2022-04-06 14:56:21,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:56:21,597 INFO L134 CoverageAnalysis]: Checked inductivity of 9025 backedges. 282 proven. 8742 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:56:21,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:56:27,131 INFO L134 CoverageAnalysis]: Checked inductivity of 9025 backedges. 282 proven. 8742 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:56:27,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153033539] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:56:27,132 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:56:27,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 96, 96] total 192 [2022-04-06 14:56:27,132 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:56:27,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1009413016] [2022-04-06 14:56:27,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1009413016] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:56:27,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:56:27,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-04-06 14:56:27,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549015745] [2022-04-06 14:56:27,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:56:27,132 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-04-06 14:56:27,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:56:27,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-04-06 14:56:27,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18147, Invalid=18525, Unknown=0, NotChecked=0, Total=36672 [2022-04-06 14:56:27,135 INFO L87 Difference]: Start difference. First operand 203 states and 206 transitions. Second operand has 97 states, 97 states have (on average 2.0309278350515463) internal successors, (197), 96 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:56:29,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:56:29,269 INFO L93 Difference]: Finished difference Result 214 states and 220 transitions. [2022-04-06 14:56:29,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-04-06 14:56:29,269 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.0309278350515463) internal successors, (197), 96 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 201 [2022-04-06 14:56:29,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:56:29,270 INFO L225 Difference]: With dead ends: 214 [2022-04-06 14:56:29,270 INFO L226 Difference]: Without dead ends: 205 [2022-04-06 14:56:29,273 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 593 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 284 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4928 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=36102, Invalid=45408, Unknown=0, NotChecked=0, Total=81510 [2022-04-06 14:56:29,273 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 102 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:56:29,273 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 49 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:56:29,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-04-06 14:56:29,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2022-04-06 14:56:29,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 200 states have (on average 1.02) internal successors, (204), 200 states have internal predecessors, (204), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:56:29,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 208 transitions. [2022-04-06 14:56:29,281 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 208 transitions. Word has length 201 [2022-04-06 14:56:29,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:56:29,281 INFO L478 AbstractCegarLoop]: Abstraction has 205 states and 208 transitions. [2022-04-06 14:56:29,281 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.0309278350515463) internal successors, (197), 96 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:56:29,281 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 208 transitions. [2022-04-06 14:56:29,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-04-06 14:56:29,282 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:56:29,282 INFO L499 BasicCegarLoop]: trace histogram [96, 94, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:56:29,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-04-06 14:56:29,495 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190,SelfDestructingSolverStorable189 [2022-04-06 14:56:29,495 INFO L403 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:56:29,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:56:29,496 INFO L85 PathProgramCache]: Analyzing trace with hash 889666463, now seen corresponding path program 189 times [2022-04-06 14:56:29,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:56:29,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [11845983] [2022-04-06 14:56:29,518 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:56:29,544 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:56:29,544 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:56:29,545 INFO L85 PathProgramCache]: Analyzing trace with hash -13833809, now seen corresponding path program 1 times [2022-04-06 14:56:29,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:56:29,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986414568] [2022-04-06 14:56:29,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:56:29,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:56:29,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:56:29,554 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:56:29,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:56:29,556 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:56:29,556 INFO L85 PathProgramCache]: Analyzing trace with hash 889666463, now seen corresponding path program 190 times [2022-04-06 14:56:29,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:56:29,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897868591] [2022-04-06 14:56:29,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:56:29,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:56:29,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:56:31,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:56:31,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:56:31,324 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 285 proven. 8930 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:56:31,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:56:31,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897868591] [2022-04-06 14:56:31,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897868591] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:56:31,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205638278] [2022-04-06 14:56:31,325 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:56:31,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:56:31,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:56:31,326 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:56:31,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-04-06 14:56:31,380 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:56:31,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:56:31,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 96 conjunts are in the unsatisfiable core [2022-04-06 14:56:31,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:56:31,553 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 285 proven. 8930 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:56:31,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:56:37,663 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 285 proven. 8930 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:56:37,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205638278] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:56:37,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:56:37,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 97, 97] total 194 [2022-04-06 14:56:37,664 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:56:37,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [11845983] [2022-04-06 14:56:37,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [11845983] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:56:37,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:56:37,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-04-06 14:56:37,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182148548] [2022-04-06 14:56:37,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:56:37,664 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-04-06 14:56:37,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:56:37,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-04-06 14:56:37,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18530, Invalid=18912, Unknown=0, NotChecked=0, Total=37442 [2022-04-06 14:56:37,667 INFO L87 Difference]: Start difference. First operand 205 states and 208 transitions. Second operand has 98 states, 98 states have (on average 2.0306122448979593) internal successors, (199), 97 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:56:40,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:56:40,005 INFO L93 Difference]: Finished difference Result 216 states and 222 transitions. [2022-04-06 14:56:40,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-04-06 14:56:40,006 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.0306122448979593) internal successors, (199), 97 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 203 [2022-04-06 14:56:40,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:56:40,007 INFO L225 Difference]: With dead ends: 216 [2022-04-06 14:56:40,007 INFO L226 Difference]: Without dead ends: 207 [2022-04-06 14:56:40,011 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 599 GetRequests, 312 SyntacticMatches, 0 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5028 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=36866, Invalid=46366, Unknown=0, NotChecked=0, Total=83232 [2022-04-06 14:56:40,011 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 103 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:56:40,011 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 29 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:56:40,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-04-06 14:56:40,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2022-04-06 14:56:40,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 202 states have (on average 1.0198019801980198) internal successors, (206), 202 states have internal predecessors, (206), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:56:40,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 210 transitions. [2022-04-06 14:56:40,019 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 210 transitions. Word has length 203 [2022-04-06 14:56:40,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:56:40,019 INFO L478 AbstractCegarLoop]: Abstraction has 207 states and 210 transitions. [2022-04-06 14:56:40,019 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.0306122448979593) internal successors, (199), 97 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:56:40,019 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 210 transitions. [2022-04-06 14:56:40,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-04-06 14:56:40,023 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:56:40,023 INFO L499 BasicCegarLoop]: trace histogram [97, 95, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:56:40,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-04-06 14:56:40,227 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable191,SelfDestructingSolverStorable192 [2022-04-06 14:56:40,227 INFO L403 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:56:40,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:56:40,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1767043836, now seen corresponding path program 191 times [2022-04-06 14:56:40,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:56:40,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1260681018] [2022-04-06 14:56:40,250 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:56:40,281 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:56:40,281 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:56:40,281 INFO L85 PathProgramCache]: Analyzing trace with hash 2035698351, now seen corresponding path program 1 times [2022-04-06 14:56:40,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:56:40,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141065854] [2022-04-06 14:56:40,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:56:40,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:56:40,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:56:40,283 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:56:40,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:56:40,285 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:56:40,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1767043836, now seen corresponding path program 192 times [2022-04-06 14:56:40,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:56:40,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001425557] [2022-04-06 14:56:40,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:56:40,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:56:40,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:56:42,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:56:42,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:56:42,676 INFO L134 CoverageAnalysis]: Checked inductivity of 9409 backedges. 288 proven. 9120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:56:42,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:56:42,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001425557] [2022-04-06 14:56:42,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001425557] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:56:42,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423972047] [2022-04-06 14:56:42,676 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:56:42,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:56:42,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:56:42,677 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:56:42,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-04-06 14:56:42,709 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 14:56:42,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:56:42,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 14:56:42,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:56:43,183 INFO L134 CoverageAnalysis]: Checked inductivity of 9409 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 9120 trivial. 0 not checked. [2022-04-06 14:56:43,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:56:43,636 INFO L134 CoverageAnalysis]: Checked inductivity of 9409 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 9120 trivial. 0 not checked. [2022-04-06 14:56:43,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423972047] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:56:43,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:56:43,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 8, 8] total 109 [2022-04-06 14:56:43,636 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:56:43,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1260681018] [2022-04-06 14:56:43,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1260681018] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:56:43,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:56:43,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-04-06 14:56:43,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111226710] [2022-04-06 14:56:43,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:56:43,637 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-04-06 14:56:43,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:56:43,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-04-06 14:56:43,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4795, Invalid=6977, Unknown=0, NotChecked=0, Total=11772 [2022-04-06 14:56:43,638 INFO L87 Difference]: Start difference. First operand 207 states and 210 transitions. Second operand has 99 states, 99 states have (on average 2.0303030303030303) internal successors, (201), 98 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:56:47,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:56:47,115 INFO L93 Difference]: Finished difference Result 218 states and 224 transitions. [2022-04-06 14:56:47,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-04-06 14:56:47,115 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.0303030303030303) internal successors, (201), 98 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 205 [2022-04-06 14:56:47,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:56:47,116 INFO L225 Difference]: With dead ends: 218 [2022-04-06 14:56:47,116 INFO L226 Difference]: Without dead ends: 209 [2022-04-06 14:56:47,119 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 401 SyntacticMatches, 1 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6008 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=14299, Invalid=27521, Unknown=0, NotChecked=0, Total=41820 [2022-04-06 14:56:47,119 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 104 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:56:47,119 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 39 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:56:47,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-04-06 14:56:47,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2022-04-06 14:56:47,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.0196078431372548) internal successors, (208), 204 states have internal predecessors, (208), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:56:47,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 212 transitions. [2022-04-06 14:56:47,161 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 212 transitions. Word has length 205 [2022-04-06 14:56:47,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:56:47,162 INFO L478 AbstractCegarLoop]: Abstraction has 209 states and 212 transitions. [2022-04-06 14:56:47,162 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.0303030303030303) internal successors, (201), 98 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:56:47,162 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 212 transitions. [2022-04-06 14:56:47,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-04-06 14:56:47,162 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:56:47,162 INFO L499 BasicCegarLoop]: trace histogram [98, 96, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:56:47,184 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-04-06 14:56:47,370 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,SelfDestructingSolverStorable194,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:56:47,370 INFO L403 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:56:47,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:56:47,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1181858023, now seen corresponding path program 193 times [2022-04-06 14:56:47,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:56:47,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [323781048] [2022-04-06 14:56:47,388 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:56:47,416 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:56:47,416 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:56:47,417 INFO L85 PathProgramCache]: Analyzing trace with hash -209736785, now seen corresponding path program 1 times [2022-04-06 14:56:47,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:56:47,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967732530] [2022-04-06 14:56:47,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:56:47,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:56:47,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:56:47,420 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:56:47,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:56:47,440 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:56:47,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1181858023, now seen corresponding path program 194 times [2022-04-06 14:56:47,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:56:47,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385642810] [2022-04-06 14:56:47,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:56:47,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:56:47,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:56:50,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:56:50,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:56:50,197 INFO L134 CoverageAnalysis]: Checked inductivity of 9604 backedges. 291 proven. 9312 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:56:50,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:56:50,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385642810] [2022-04-06 14:56:50,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385642810] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:56:50,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894319952] [2022-04-06 14:56:50,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:56:50,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:56:50,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:56:50,198 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:56:50,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-04-06 14:56:50,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:56:50,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:56:50,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 98 conjunts are in the unsatisfiable core [2022-04-06 14:56:50,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:56:50,507 INFO L134 CoverageAnalysis]: Checked inductivity of 9604 backedges. 291 proven. 9312 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:56:50,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:56:56,890 INFO L134 CoverageAnalysis]: Checked inductivity of 9604 backedges. 291 proven. 9312 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:56:56,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894319952] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:56:56,890 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:56:56,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 99, 99] total 198 [2022-04-06 14:56:56,890 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:56:56,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [323781048] [2022-04-06 14:56:56,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [323781048] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:56:56,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:56:56,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-04-06 14:56:56,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185176294] [2022-04-06 14:56:56,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:56:56,891 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-04-06 14:56:56,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:56:56,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-04-06 14:56:56,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19308, Invalid=19698, Unknown=0, NotChecked=0, Total=39006 [2022-04-06 14:56:56,893 INFO L87 Difference]: Start difference. First operand 209 states and 212 transitions. Second operand has 100 states, 100 states have (on average 2.03) internal successors, (203), 99 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:56:59,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:56:59,857 INFO L93 Difference]: Finished difference Result 220 states and 226 transitions. [2022-04-06 14:56:59,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-04-06 14:56:59,858 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.03) internal successors, (203), 99 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 207 [2022-04-06 14:56:59,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:56:59,861 INFO L225 Difference]: With dead ends: 220 [2022-04-06 14:56:59,861 INFO L226 Difference]: Without dead ends: 211 [2022-04-06 14:56:59,865 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 611 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 293 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5231 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=38418, Invalid=48312, Unknown=0, NotChecked=0, Total=86730 [2022-04-06 14:56:59,865 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 105 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:56:59,865 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 34 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:56:59,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-04-06 14:56:59,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2022-04-06 14:56:59,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 206 states have (on average 1.0194174757281553) internal successors, (210), 206 states have internal predecessors, (210), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:56:59,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 214 transitions. [2022-04-06 14:56:59,900 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 214 transitions. Word has length 207 [2022-04-06 14:56:59,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:56:59,900 INFO L478 AbstractCegarLoop]: Abstraction has 211 states and 214 transitions. [2022-04-06 14:56:59,900 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.03) internal successors, (203), 99 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:56:59,900 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 214 transitions. [2022-04-06 14:56:59,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-04-06 14:56:59,902 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:56:59,902 INFO L499 BasicCegarLoop]: trace histogram [99, 97, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:56:59,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-04-06 14:57:00,103 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,SelfDestructingSolverStorable196,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:57:00,103 INFO L403 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:57:00,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:57:00,103 INFO L85 PathProgramCache]: Analyzing trace with hash -398129162, now seen corresponding path program 195 times [2022-04-06 14:57:00,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:57:00,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2116880651] [2022-04-06 14:57:00,117 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:57:00,139 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:57:00,139 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:57:00,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1839795375, now seen corresponding path program 1 times [2022-04-06 14:57:00,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:57:00,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417896358] [2022-04-06 14:57:00,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:57:00,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:57:00,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:57:00,142 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:57:00,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:57:00,143 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:57:00,143 INFO L85 PathProgramCache]: Analyzing trace with hash -398129162, now seen corresponding path program 196 times [2022-04-06 14:57:00,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:57:00,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421275163] [2022-04-06 14:57:00,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:57:00,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:57:00,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:57:01,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:57:01,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:57:01,964 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 294 proven. 9506 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:57:01,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:57:01,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421275163] [2022-04-06 14:57:01,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421275163] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:57:01,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644688690] [2022-04-06 14:57:01,964 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:57:01,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:57:01,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:57:01,965 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:57:01,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-04-06 14:57:02,022 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:57:02,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:57:02,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 99 conjunts are in the unsatisfiable core [2022-04-06 14:57:02,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:57:02,239 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 294 proven. 9506 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:57:02,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:57:08,222 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 294 proven. 9506 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:57:08,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644688690] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:57:08,222 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:57:08,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 100, 100] total 200 [2022-04-06 14:57:08,222 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:57:08,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2116880651] [2022-04-06 14:57:08,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2116880651] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:57:08,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:57:08,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-04-06 14:57:08,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131808174] [2022-04-06 14:57:08,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:57:08,223 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-04-06 14:57:08,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:57:08,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-04-06 14:57:08,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19703, Invalid=20097, Unknown=0, NotChecked=0, Total=39800 [2022-04-06 14:57:08,226 INFO L87 Difference]: Start difference. First operand 211 states and 214 transitions. Second operand has 101 states, 101 states have (on average 2.0297029702970297) internal successors, (205), 100 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:57:11,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:57:11,044 INFO L93 Difference]: Finished difference Result 222 states and 228 transitions. [2022-04-06 14:57:11,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-04-06 14:57:11,044 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.0297029702970297) internal successors, (205), 100 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 209 [2022-04-06 14:57:11,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:57:11,045 INFO L225 Difference]: With dead ends: 222 [2022-04-06 14:57:11,045 INFO L226 Difference]: Without dead ends: 213 [2022-04-06 14:57:11,049 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 617 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 296 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5334 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=39206, Invalid=49300, Unknown=0, NotChecked=0, Total=88506 [2022-04-06 14:57:11,049 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 106 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:57:11,049 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 29 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:57:11,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-04-06 14:57:11,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2022-04-06 14:57:11,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 208 states have (on average 1.0192307692307692) internal successors, (212), 208 states have internal predecessors, (212), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:57:11,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 216 transitions. [2022-04-06 14:57:11,058 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 216 transitions. Word has length 209 [2022-04-06 14:57:11,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:57:11,059 INFO L478 AbstractCegarLoop]: Abstraction has 213 states and 216 transitions. [2022-04-06 14:57:11,059 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.0297029702970297) internal successors, (205), 100 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:57:11,059 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 216 transitions. [2022-04-06 14:57:11,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-04-06 14:57:11,059 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:57:11,060 INFO L499 BasicCegarLoop]: trace histogram [100, 98, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:57:11,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-04-06 14:57:11,275 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,SelfDestructingSolverStorable198,99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:57:11,276 INFO L403 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:57:11,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:57:11,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1146029459, now seen corresponding path program 197 times [2022-04-06 14:57:11,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:57:11,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [66567589] [2022-04-06 14:57:11,290 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:57:11,319 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:57:11,320 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:57:11,320 INFO L85 PathProgramCache]: Analyzing trace with hash -405639761, now seen corresponding path program 1 times [2022-04-06 14:57:11,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:57:11,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515435994] [2022-04-06 14:57:11,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:57:11,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:57:11,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:57:11,322 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:57:11,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:57:11,326 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:57:11,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1146029459, now seen corresponding path program 198 times [2022-04-06 14:57:11,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:57:11,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369960890] [2022-04-06 14:57:11,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:57:11,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:57:11,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:57:13,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:57:13,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:57:13,328 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 297 proven. 9702 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:57:13,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:57:13,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369960890] [2022-04-06 14:57:13,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369960890] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:57:13,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807606658] [2022-04-06 14:57:13,328 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:57:13,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:57:13,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:57:13,329 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:57:13,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-04-06 14:57:13,360 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 14:57:13,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:57:13,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 14:57:13,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:57:13,860 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 0 proven. 298 refuted. 0 times theorem prover too weak. 9702 trivial. 0 not checked. [2022-04-06 14:57:13,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:57:14,297 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 0 proven. 298 refuted. 0 times theorem prover too weak. 9702 trivial. 0 not checked. [2022-04-06 14:57:14,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807606658] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:57:14,297 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:57:14,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 8, 8] total 112 [2022-04-06 14:57:14,297 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:57:14,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [66567589] [2022-04-06 14:57:14,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [66567589] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:57:14,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:57:14,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-04-06 14:57:14,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747236670] [2022-04-06 14:57:14,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:57:14,298 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-04-06 14:57:14,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:57:14,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-04-06 14:57:14,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5092, Invalid=7340, Unknown=0, NotChecked=0, Total=12432 [2022-04-06 14:57:14,300 INFO L87 Difference]: Start difference. First operand 213 states and 216 transitions. Second operand has 102 states, 102 states have (on average 2.0294117647058822) internal successors, (207), 101 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:57:16,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:57:16,882 INFO L93 Difference]: Finished difference Result 224 states and 230 transitions. [2022-04-06 14:57:16,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-04-06 14:57:16,883 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.0294117647058822) internal successors, (207), 101 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 211 [2022-04-06 14:57:16,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:57:16,883 INFO L225 Difference]: With dead ends: 224 [2022-04-06 14:57:16,883 INFO L226 Difference]: Without dead ends: 215 [2022-04-06 14:57:16,886 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 623 GetRequests, 413 SyntacticMatches, 1 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6344 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=15190, Invalid=29120, Unknown=0, NotChecked=0, Total=44310 [2022-04-06 14:57:16,886 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 107 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:57:16,886 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 49 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:57:16,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-04-06 14:57:16,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2022-04-06 14:57:16,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 210 states have (on average 1.019047619047619) internal successors, (214), 210 states have internal predecessors, (214), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:57:16,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 218 transitions. [2022-04-06 14:57:16,894 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 218 transitions. Word has length 211 [2022-04-06 14:57:16,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:57:16,894 INFO L478 AbstractCegarLoop]: Abstraction has 215 states and 218 transitions. [2022-04-06 14:57:16,894 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 2.0294117647058822) internal successors, (207), 101 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:57:16,894 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 218 transitions. [2022-04-06 14:57:16,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-04-06 14:57:16,895 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:57:16,895 INFO L499 BasicCegarLoop]: trace histogram [101, 99, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:57:16,911 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-04-06 14:57:17,096 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199,SelfDestructingSolverStorable200,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:57:17,096 INFO L403 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:57:17,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:57:17,097 INFO L85 PathProgramCache]: Analyzing trace with hash -976220176, now seen corresponding path program 199 times [2022-04-06 14:57:17,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:57:17,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1500784390] [2022-04-06 14:57:17,109 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:57:17,138 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:57:17,139 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:57:17,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1643892399, now seen corresponding path program 1 times [2022-04-06 14:57:17,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:57:17,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549127327] [2022-04-06 14:57:17,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:57:17,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:57:17,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:57:17,141 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:57:17,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:57:17,143 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:57:17,143 INFO L85 PathProgramCache]: Analyzing trace with hash -976220176, now seen corresponding path program 200 times [2022-04-06 14:57:17,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:57:17,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761442759] [2022-04-06 14:57:17,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:57:17,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:57:17,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:57:18,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:57:18,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:57:18,943 INFO L134 CoverageAnalysis]: Checked inductivity of 10201 backedges. 300 proven. 9900 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:57:18,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:57:18,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761442759] [2022-04-06 14:57:18,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761442759] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:57:18,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85140124] [2022-04-06 14:57:18,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:57:18,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:57:18,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:57:18,945 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:57:18,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-04-06 14:57:18,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:57:18,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:57:18,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 101 conjunts are in the unsatisfiable core [2022-04-06 14:57:18,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:57:19,181 INFO L134 CoverageAnalysis]: Checked inductivity of 10201 backedges. 300 proven. 9900 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:57:19,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:57:25,279 INFO L134 CoverageAnalysis]: Checked inductivity of 10201 backedges. 300 proven. 9900 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:57:25,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85140124] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:57:25,279 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:57:25,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 102, 102] total 204 [2022-04-06 14:57:25,280 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:57:25,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1500784390] [2022-04-06 14:57:25,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1500784390] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:57:25,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:57:25,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-04-06 14:57:25,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743250602] [2022-04-06 14:57:25,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:57:25,280 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-04-06 14:57:25,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:57:25,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-04-06 14:57:25,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20505, Invalid=20907, Unknown=0, NotChecked=0, Total=41412 [2022-04-06 14:57:25,283 INFO L87 Difference]: Start difference. First operand 215 states and 218 transitions. Second operand has 103 states, 103 states have (on average 2.029126213592233) internal successors, (209), 102 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:57:28,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:57:28,104 INFO L93 Difference]: Finished difference Result 226 states and 232 transitions. [2022-04-06 14:57:28,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-04-06 14:57:28,104 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.029126213592233) internal successors, (209), 102 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 213 [2022-04-06 14:57:28,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:57:28,105 INFO L225 Difference]: With dead ends: 226 [2022-04-06 14:57:28,105 INFO L226 Difference]: Without dead ends: 217 [2022-04-06 14:57:28,109 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 629 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 302 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5543 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=40806, Invalid=51306, Unknown=0, NotChecked=0, Total=92112 [2022-04-06 14:57:28,110 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 108 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:57:28,110 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 49 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:57:28,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-04-06 14:57:28,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2022-04-06 14:57:28,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 212 states have (on average 1.0188679245283019) internal successors, (216), 212 states have internal predecessors, (216), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:57:28,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 220 transitions. [2022-04-06 14:57:28,119 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 220 transitions. Word has length 213 [2022-04-06 14:57:28,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:57:28,119 INFO L478 AbstractCegarLoop]: Abstraction has 217 states and 220 transitions. [2022-04-06 14:57:28,119 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 2.029126213592233) internal successors, (209), 102 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:57:28,120 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 220 transitions. [2022-04-06 14:57:28,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-04-06 14:57:28,120 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:57:28,120 INFO L499 BasicCegarLoop]: trace histogram [102, 100, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:57:28,136 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-04-06 14:57:28,336 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201,SelfDestructingSolverStorable202 [2022-04-06 14:57:28,336 INFO L403 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:57:28,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:57:28,336 INFO L85 PathProgramCache]: Analyzing trace with hash -348653811, now seen corresponding path program 201 times [2022-04-06 14:57:28,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:57:28,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [962404977] [2022-04-06 14:57:28,347 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:57:28,369 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:57:28,369 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:57:28,369 INFO L85 PathProgramCache]: Analyzing trace with hash -601542737, now seen corresponding path program 1 times [2022-04-06 14:57:28,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:57:28,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730981700] [2022-04-06 14:57:28,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:57:28,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:57:28,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:57:28,372 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:57:28,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:57:28,374 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:57:28,374 INFO L85 PathProgramCache]: Analyzing trace with hash -348653811, now seen corresponding path program 202 times [2022-04-06 14:57:28,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:57:28,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415507590] [2022-04-06 14:57:28,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:57:28,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:57:28,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:57:30,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:57:30,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:57:30,707 INFO L134 CoverageAnalysis]: Checked inductivity of 10404 backedges. 303 proven. 10100 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:57:30,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:57:30,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415507590] [2022-04-06 14:57:30,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415507590] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:57:30,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810091791] [2022-04-06 14:57:30,708 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:57:30,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:57:30,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:57:30,716 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:57:30,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-04-06 14:57:30,774 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:57:30,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:57:30,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 102 conjunts are in the unsatisfiable core [2022-04-06 14:57:30,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:57:31,139 INFO L134 CoverageAnalysis]: Checked inductivity of 10404 backedges. 303 proven. 10100 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:57:31,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:57:38,869 INFO L134 CoverageAnalysis]: Checked inductivity of 10404 backedges. 303 proven. 10100 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:57:38,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810091791] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:57:38,869 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:57:38,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 103, 103] total 206 [2022-04-06 14:57:38,869 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:57:38,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [962404977] [2022-04-06 14:57:38,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [962404977] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:57:38,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:57:38,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-04-06 14:57:38,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118468491] [2022-04-06 14:57:38,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:57:38,871 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-04-06 14:57:38,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:57:38,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-04-06 14:57:38,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20912, Invalid=21318, Unknown=0, NotChecked=0, Total=42230 [2022-04-06 14:57:38,875 INFO L87 Difference]: Start difference. First operand 217 states and 220 transitions. Second operand has 104 states, 104 states have (on average 2.0288461538461537) internal successors, (211), 103 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:57:41,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:57:41,384 INFO L93 Difference]: Finished difference Result 228 states and 234 transitions. [2022-04-06 14:57:41,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-04-06 14:57:41,385 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.0288461538461537) internal successors, (211), 103 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 215 [2022-04-06 14:57:41,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:57:41,385 INFO L225 Difference]: With dead ends: 228 [2022-04-06 14:57:41,385 INFO L226 Difference]: Without dead ends: 219 [2022-04-06 14:57:41,388 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 635 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 305 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5649 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=41618, Invalid=52324, Unknown=0, NotChecked=0, Total=93942 [2022-04-06 14:57:41,389 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 109 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:57:41,389 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 49 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:57:41,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-04-06 14:57:41,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2022-04-06 14:57:41,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 214 states have (on average 1.0186915887850467) internal successors, (218), 214 states have internal predecessors, (218), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:57:41,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 222 transitions. [2022-04-06 14:57:41,398 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 222 transitions. Word has length 215 [2022-04-06 14:57:41,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:57:41,398 INFO L478 AbstractCegarLoop]: Abstraction has 219 states and 222 transitions. [2022-04-06 14:57:41,398 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.0288461538461537) internal successors, (211), 103 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:57:41,399 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 222 transitions. [2022-04-06 14:57:41,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-04-06 14:57:41,401 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:57:41,401 INFO L499 BasicCegarLoop]: trace histogram [103, 101, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:57:41,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-04-06 14:57:41,610 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,SelfDestructingSolverStorable204,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:57:41,610 INFO L403 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:57:41,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:57:41,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1447201514, now seen corresponding path program 203 times [2022-04-06 14:57:41,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:57:41,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1883173884] [2022-04-06 14:57:41,628 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:57:41,659 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:57:41,659 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:57:41,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1447989423, now seen corresponding path program 1 times [2022-04-06 14:57:41,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:57:41,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105206523] [2022-04-06 14:57:41,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:57:41,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:57:41,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:57:41,662 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:57:41,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:57:41,663 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:57:41,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1447201514, now seen corresponding path program 204 times [2022-04-06 14:57:41,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:57:41,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267432215] [2022-04-06 14:57:41,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:57:41,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:57:41,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:57:44,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:57:44,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:57:44,429 INFO L134 CoverageAnalysis]: Checked inductivity of 10609 backedges. 306 proven. 10302 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:57:44,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:57:44,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267432215] [2022-04-06 14:57:44,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267432215] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:57:44,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443709959] [2022-04-06 14:57:44,430 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:57:44,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:57:44,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:57:44,431 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:57:44,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-04-06 14:57:44,470 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 14:57:44,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:57:44,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 14:57:44,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:57:44,780 INFO L134 CoverageAnalysis]: Checked inductivity of 10609 backedges. 0 proven. 307 refuted. 0 times theorem prover too weak. 10302 trivial. 0 not checked. [2022-04-06 14:57:44,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:57:45,050 INFO L134 CoverageAnalysis]: Checked inductivity of 10609 backedges. 0 proven. 307 refuted. 0 times theorem prover too weak. 10302 trivial. 0 not checked. [2022-04-06 14:57:45,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443709959] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:57:45,050 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:57:45,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 8, 8] total 115 [2022-04-06 14:57:45,050 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:57:45,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1883173884] [2022-04-06 14:57:45,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1883173884] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:57:45,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:57:45,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-04-06 14:57:45,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226126528] [2022-04-06 14:57:45,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:57:45,051 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-04-06 14:57:45,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:57:45,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-04-06 14:57:45,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5398, Invalid=7712, Unknown=0, NotChecked=0, Total=13110 [2022-04-06 14:57:45,053 INFO L87 Difference]: Start difference. First operand 219 states and 222 transitions. Second operand has 105 states, 105 states have (on average 2.0285714285714285) internal successors, (213), 104 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:57:48,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:57:48,007 INFO L93 Difference]: Finished difference Result 230 states and 236 transitions. [2022-04-06 14:57:48,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-04-06 14:57:48,008 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.0285714285714285) internal successors, (213), 104 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 217 [2022-04-06 14:57:48,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:57:48,008 INFO L225 Difference]: With dead ends: 230 [2022-04-06 14:57:48,008 INFO L226 Difference]: Without dead ends: 221 [2022-04-06 14:57:48,011 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 641 GetRequests, 425 SyntacticMatches, 1 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6689 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=16108, Invalid=30764, Unknown=0, NotChecked=0, Total=46872 [2022-04-06 14:57:48,011 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 110 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:57:48,011 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 39 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:57:48,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-04-06 14:57:48,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2022-04-06 14:57:48,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 216 states have (on average 1.0185185185185186) internal successors, (220), 216 states have internal predecessors, (220), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:57:48,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 224 transitions. [2022-04-06 14:57:48,034 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 224 transitions. Word has length 217 [2022-04-06 14:57:48,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:57:48,034 INFO L478 AbstractCegarLoop]: Abstraction has 221 states and 224 transitions. [2022-04-06 14:57:48,034 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.0285714285714285) internal successors, (213), 104 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:57:48,034 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 224 transitions. [2022-04-06 14:57:48,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-04-06 14:57:48,034 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:57:48,034 INFO L499 BasicCegarLoop]: trace histogram [104, 102, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:57:48,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-04-06 14:57:48,235 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205,SelfDestructingSolverStorable206 [2022-04-06 14:57:48,235 INFO L403 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:57:48,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:57:48,235 INFO L85 PathProgramCache]: Analyzing trace with hash 687315847, now seen corresponding path program 205 times [2022-04-06 14:57:48,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:57:48,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1989843422] [2022-04-06 14:57:48,247 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:57:48,276 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:57:48,277 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:57:48,277 INFO L85 PathProgramCache]: Analyzing trace with hash -797445713, now seen corresponding path program 1 times [2022-04-06 14:57:48,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:57:48,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849780064] [2022-04-06 14:57:48,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:57:48,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:57:48,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:57:48,280 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:57:48,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:57:48,287 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:57:48,287 INFO L85 PathProgramCache]: Analyzing trace with hash 687315847, now seen corresponding path program 206 times [2022-04-06 14:57:48,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:57:48,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057204151] [2022-04-06 14:57:48,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:57:48,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:57:48,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:57:51,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:57:51,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:57:51,182 INFO L134 CoverageAnalysis]: Checked inductivity of 10816 backedges. 309 proven. 10506 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:57:51,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:57:51,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057204151] [2022-04-06 14:57:51,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057204151] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:57:51,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849834916] [2022-04-06 14:57:51,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:57:51,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:57:51,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:57:51,184 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:57:51,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-04-06 14:57:51,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:57:51,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:57:51,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 104 conjunts are in the unsatisfiable core [2022-04-06 14:57:51,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:57:51,463 INFO L134 CoverageAnalysis]: Checked inductivity of 10816 backedges. 309 proven. 10506 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:57:51,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:57:59,326 INFO L134 CoverageAnalysis]: Checked inductivity of 10816 backedges. 309 proven. 10506 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:57:59,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849834916] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:57:59,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:57:59,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 105, 105] total 210 [2022-04-06 14:57:59,326 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:57:59,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1989843422] [2022-04-06 14:57:59,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1989843422] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:57:59,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:57:59,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-04-06 14:57:59,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654395807] [2022-04-06 14:57:59,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:57:59,327 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-04-06 14:57:59,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:57:59,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-04-06 14:57:59,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21738, Invalid=22152, Unknown=0, NotChecked=0, Total=43890 [2022-04-06 14:57:59,330 INFO L87 Difference]: Start difference. First operand 221 states and 224 transitions. Second operand has 106 states, 106 states have (on average 2.0283018867924527) internal successors, (215), 105 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:58:02,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:58:02,257 INFO L93 Difference]: Finished difference Result 232 states and 238 transitions. [2022-04-06 14:58:02,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-04-06 14:58:02,257 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.0283018867924527) internal successors, (215), 105 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 219 [2022-04-06 14:58:02,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:58:02,258 INFO L225 Difference]: With dead ends: 232 [2022-04-06 14:58:02,258 INFO L226 Difference]: Without dead ends: 223 [2022-04-06 14:58:02,272 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 647 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 311 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5864 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=43266, Invalid=54390, Unknown=0, NotChecked=0, Total=97656 [2022-04-06 14:58:02,272 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 111 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:58:02,272 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 34 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:58:02,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-04-06 14:58:02,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2022-04-06 14:58:02,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 218 states have (on average 1.018348623853211) internal successors, (222), 218 states have internal predecessors, (222), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:58:02,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 226 transitions. [2022-04-06 14:58:02,281 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 226 transitions. Word has length 219 [2022-04-06 14:58:02,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:58:02,281 INFO L478 AbstractCegarLoop]: Abstraction has 223 states and 226 transitions. [2022-04-06 14:58:02,281 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 2.0283018867924527) internal successors, (215), 105 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:58:02,281 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 226 transitions. [2022-04-06 14:58:02,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-04-06 14:58:02,282 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:58:02,282 INFO L499 BasicCegarLoop]: trace histogram [105, 103, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:58:02,301 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-04-06 14:58:02,495 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,SelfDestructingSolverStorable208,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:58:02,495 INFO L403 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:58:02,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:58:02,496 INFO L85 PathProgramCache]: Analyzing trace with hash 581630180, now seen corresponding path program 207 times [2022-04-06 14:58:02,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:58:02,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1427129715] [2022-04-06 14:58:02,510 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:58:02,539 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:58:02,539 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:58:02,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1252086447, now seen corresponding path program 1 times [2022-04-06 14:58:02,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:58:02,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670154155] [2022-04-06 14:58:02,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:58:02,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:58:02,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:58:02,542 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:58:02,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:58:02,544 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:58:02,544 INFO L85 PathProgramCache]: Analyzing trace with hash 581630180, now seen corresponding path program 208 times [2022-04-06 14:58:02,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:58:02,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816200122] [2022-04-06 14:58:02,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:58:02,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:58:02,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:58:04,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:58:04,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:58:04,756 INFO L134 CoverageAnalysis]: Checked inductivity of 11025 backedges. 312 proven. 10712 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:58:04,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:58:04,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816200122] [2022-04-06 14:58:04,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816200122] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:58:04,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345588254] [2022-04-06 14:58:04,756 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:58:04,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:58:04,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:58:04,757 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:58:04,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-04-06 14:58:04,822 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:58:04,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:58:04,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 105 conjunts are in the unsatisfiable core [2022-04-06 14:58:04,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:58:05,015 INFO L134 CoverageAnalysis]: Checked inductivity of 11025 backedges. 312 proven. 10712 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:58:05,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:58:11,082 INFO L134 CoverageAnalysis]: Checked inductivity of 11025 backedges. 312 proven. 10712 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:58:11,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345588254] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:58:11,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:58:11,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 106, 106] total 212 [2022-04-06 14:58:11,082 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:58:11,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1427129715] [2022-04-06 14:58:11,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1427129715] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:58:11,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:58:11,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-04-06 14:58:11,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866155422] [2022-04-06 14:58:11,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:58:11,083 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-04-06 14:58:11,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:58:11,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-04-06 14:58:11,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22157, Invalid=22575, Unknown=0, NotChecked=0, Total=44732 [2022-04-06 14:58:11,086 INFO L87 Difference]: Start difference. First operand 223 states and 226 transitions. Second operand has 107 states, 107 states have (on average 2.02803738317757) internal successors, (217), 106 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:58:13,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:58:13,770 INFO L93 Difference]: Finished difference Result 234 states and 240 transitions. [2022-04-06 14:58:13,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-04-06 14:58:13,771 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.02803738317757) internal successors, (217), 106 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 221 [2022-04-06 14:58:13,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:58:13,771 INFO L225 Difference]: With dead ends: 234 [2022-04-06 14:58:13,771 INFO L226 Difference]: Without dead ends: 225 [2022-04-06 14:58:13,775 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 653 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 314 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5973 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=44102, Invalid=55438, Unknown=0, NotChecked=0, Total=99540 [2022-04-06 14:58:13,776 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 112 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:58:13,776 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 39 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:58:13,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-04-06 14:58:13,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2022-04-06 14:58:13,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 220 states have (on average 1.018181818181818) internal successors, (224), 220 states have internal predecessors, (224), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:58:13,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 228 transitions. [2022-04-06 14:58:13,784 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 228 transitions. Word has length 221 [2022-04-06 14:58:13,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:58:13,784 INFO L478 AbstractCegarLoop]: Abstraction has 225 states and 228 transitions. [2022-04-06 14:58:13,784 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.02803738317757) internal successors, (217), 106 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:58:13,784 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 228 transitions. [2022-04-06 14:58:13,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-04-06 14:58:13,786 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:58:13,786 INFO L499 BasicCegarLoop]: trace histogram [106, 104, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:58:13,802 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-04-06 14:58:13,990 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,SelfDestructingSolverStorable210,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:58:13,990 INFO L403 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:58:13,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:58:13,990 INFO L85 PathProgramCache]: Analyzing trace with hash 2096919297, now seen corresponding path program 209 times [2022-04-06 14:58:13,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:58:13,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1405515053] [2022-04-06 14:58:14,012 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:58:14,058 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:58:14,058 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:58:14,058 INFO L85 PathProgramCache]: Analyzing trace with hash -993348689, now seen corresponding path program 1 times [2022-04-06 14:58:14,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:58:14,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755199252] [2022-04-06 14:58:14,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:58:14,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:58:14,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:58:14,061 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:58:14,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:58:14,062 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:58:14,062 INFO L85 PathProgramCache]: Analyzing trace with hash 2096919297, now seen corresponding path program 210 times [2022-04-06 14:58:14,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:58:14,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519028930] [2022-04-06 14:58:14,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:58:14,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:58:14,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:58:16,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:58:16,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:58:16,466 INFO L134 CoverageAnalysis]: Checked inductivity of 11236 backedges. 315 proven. 10920 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:58:16,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:58:16,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519028930] [2022-04-06 14:58:16,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519028930] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:58:16,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315185666] [2022-04-06 14:58:16,467 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:58:16,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:58:16,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:58:16,468 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:58:16,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-04-06 14:58:16,498 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 14:58:16,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:58:16,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 14:58:16,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:58:16,890 INFO L134 CoverageAnalysis]: Checked inductivity of 11236 backedges. 0 proven. 316 refuted. 0 times theorem prover too weak. 10920 trivial. 0 not checked. [2022-04-06 14:58:16,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:58:17,340 INFO L134 CoverageAnalysis]: Checked inductivity of 11236 backedges. 0 proven. 316 refuted. 0 times theorem prover too weak. 10920 trivial. 0 not checked. [2022-04-06 14:58:17,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315185666] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:58:17,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:58:17,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 8, 8] total 118 [2022-04-06 14:58:17,341 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:58:17,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1405515053] [2022-04-06 14:58:17,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1405515053] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:58:17,341 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:58:17,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-04-06 14:58:17,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874706991] [2022-04-06 14:58:17,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:58:17,342 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-04-06 14:58:17,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:58:17,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-04-06 14:58:17,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5713, Invalid=8093, Unknown=0, NotChecked=0, Total=13806 [2022-04-06 14:58:17,343 INFO L87 Difference]: Start difference. First operand 225 states and 228 transitions. Second operand has 108 states, 108 states have (on average 2.0277777777777777) internal successors, (219), 107 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:58:20,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:58:20,544 INFO L93 Difference]: Finished difference Result 236 states and 242 transitions. [2022-04-06 14:58:20,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-04-06 14:58:20,544 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 2.0277777777777777) internal successors, (219), 107 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 223 [2022-04-06 14:58:20,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:58:20,545 INFO L225 Difference]: With dead ends: 236 [2022-04-06 14:58:20,545 INFO L226 Difference]: Without dead ends: 227 [2022-04-06 14:58:20,547 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 659 GetRequests, 437 SyntacticMatches, 1 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7043 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=17053, Invalid=32453, Unknown=0, NotChecked=0, Total=49506 [2022-04-06 14:58:20,547 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 113 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:58:20,547 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 34 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:58:20,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-04-06 14:58:20,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2022-04-06 14:58:20,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 222 states have (on average 1.018018018018018) internal successors, (226), 222 states have internal predecessors, (226), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:58:20,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 230 transitions. [2022-04-06 14:58:20,555 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 230 transitions. Word has length 223 [2022-04-06 14:58:20,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:58:20,555 INFO L478 AbstractCegarLoop]: Abstraction has 227 states and 230 transitions. [2022-04-06 14:58:20,555 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 2.0277777777777777) internal successors, (219), 107 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:58:20,556 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 230 transitions. [2022-04-06 14:58:20,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-04-06 14:58:20,556 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:58:20,556 INFO L499 BasicCegarLoop]: trace histogram [107, 105, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:58:20,572 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-04-06 14:58:20,771 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211,SelfDestructingSolverStorable212 [2022-04-06 14:58:20,771 INFO L403 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:58:20,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:58:20,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1999119906, now seen corresponding path program 211 times [2022-04-06 14:58:20,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:58:20,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1409850180] [2022-04-06 14:58:20,793 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:58:20,836 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:58:20,836 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:58:20,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1056183471, now seen corresponding path program 1 times [2022-04-06 14:58:20,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:58:20,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754193400] [2022-04-06 14:58:20,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:58:20,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:58:20,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:58:20,839 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:58:20,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:58:20,840 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:58:20,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1999119906, now seen corresponding path program 212 times [2022-04-06 14:58:20,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:58:20,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498549927] [2022-04-06 14:58:20,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:58:20,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:58:20,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:58:23,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:58:23,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:58:23,452 INFO L134 CoverageAnalysis]: Checked inductivity of 11449 backedges. 318 proven. 11130 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:58:23,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:58:23,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498549927] [2022-04-06 14:58:23,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498549927] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:58:23,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233397643] [2022-04-06 14:58:23,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:58:23,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:58:23,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:58:23,454 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:58:23,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-04-06 14:58:23,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:58:23,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:58:23,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 107 conjunts are in the unsatisfiable core [2022-04-06 14:58:23,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:58:23,804 INFO L134 CoverageAnalysis]: Checked inductivity of 11449 backedges. 318 proven. 11130 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:58:23,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:58:30,229 INFO L134 CoverageAnalysis]: Checked inductivity of 11449 backedges. 318 proven. 11130 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:58:30,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233397643] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:58:30,230 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:58:30,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 108, 108] total 216 [2022-04-06 14:58:30,230 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:58:30,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1409850180] [2022-04-06 14:58:30,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1409850180] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:58:30,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:58:30,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2022-04-06 14:58:30,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478406965] [2022-04-06 14:58:30,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:58:30,230 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-04-06 14:58:30,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:58:30,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-04-06 14:58:30,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23007, Invalid=23433, Unknown=0, NotChecked=0, Total=46440 [2022-04-06 14:58:30,233 INFO L87 Difference]: Start difference. First operand 227 states and 230 transitions. Second operand has 109 states, 109 states have (on average 2.0275229357798166) internal successors, (221), 108 states have internal predecessors, (221), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:58:33,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:58:33,776 INFO L93 Difference]: Finished difference Result 238 states and 244 transitions. [2022-04-06 14:58:33,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-04-06 14:58:33,776 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.0275229357798166) internal successors, (221), 108 states have internal predecessors, (221), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 225 [2022-04-06 14:58:33,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:58:33,777 INFO L225 Difference]: With dead ends: 238 [2022-04-06 14:58:33,777 INFO L226 Difference]: Without dead ends: 229 [2022-04-06 14:58:33,780 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 665 GetRequests, 345 SyntacticMatches, 0 SemanticMatches, 320 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6194 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=45798, Invalid=57564, Unknown=0, NotChecked=0, Total=103362 [2022-04-06 14:58:33,780 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 114 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:58:33,780 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 44 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:58:33,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-04-06 14:58:33,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2022-04-06 14:58:33,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 224 states have (on average 1.0178571428571428) internal successors, (228), 224 states have internal predecessors, (228), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:58:33,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 232 transitions. [2022-04-06 14:58:33,788 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 232 transitions. Word has length 225 [2022-04-06 14:58:33,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:58:33,789 INFO L478 AbstractCegarLoop]: Abstraction has 229 states and 232 transitions. [2022-04-06 14:58:33,789 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 2.0275229357798166) internal successors, (221), 108 states have internal predecessors, (221), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:58:33,789 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 232 transitions. [2022-04-06 14:58:33,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-04-06 14:58:33,789 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:58:33,789 INFO L499 BasicCegarLoop]: trace histogram [108, 106, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:58:33,805 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2022-04-06 14:58:34,005 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214,SelfDestructingSolverStorable213 [2022-04-06 14:58:34,005 INFO L403 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:58:34,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:58:34,006 INFO L85 PathProgramCache]: Analyzing trace with hash 192216443, now seen corresponding path program 213 times [2022-04-06 14:58:34,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:58:34,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [13270787] [2022-04-06 14:58:34,022 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:58:34,066 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:58:34,066 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:58:34,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1189251665, now seen corresponding path program 1 times [2022-04-06 14:58:34,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:58:34,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387200773] [2022-04-06 14:58:34,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:58:34,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:58:34,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:58:34,068 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:58:34,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:58:34,070 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:58:34,070 INFO L85 PathProgramCache]: Analyzing trace with hash 192216443, now seen corresponding path program 214 times [2022-04-06 14:58:34,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:58:34,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753601599] [2022-04-06 14:58:34,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:58:34,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:58:34,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:58:36,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:58:36,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:58:36,302 INFO L134 CoverageAnalysis]: Checked inductivity of 11664 backedges. 321 proven. 11342 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:58:36,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:58:36,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753601599] [2022-04-06 14:58:36,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753601599] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:58:36,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619961644] [2022-04-06 14:58:36,303 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:58:36,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:58:36,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:58:36,304 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:58:36,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-04-06 14:58:36,376 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:58:36,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:58:36,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 108 conjunts are in the unsatisfiable core [2022-04-06 14:58:36,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:58:36,568 INFO L134 CoverageAnalysis]: Checked inductivity of 11664 backedges. 321 proven. 11342 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:58:36,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:58:43,564 INFO L134 CoverageAnalysis]: Checked inductivity of 11664 backedges. 321 proven. 11342 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:58:43,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619961644] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:58:43,564 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:58:43,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 109, 109] total 218 [2022-04-06 14:58:43,564 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:58:43,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [13270787] [2022-04-06 14:58:43,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [13270787] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:58:43,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:58:43,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2022-04-06 14:58:43,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946669794] [2022-04-06 14:58:43,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:58:43,565 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-04-06 14:58:43,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:58:43,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-04-06 14:58:43,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23438, Invalid=23868, Unknown=0, NotChecked=0, Total=47306 [2022-04-06 14:58:43,568 INFO L87 Difference]: Start difference. First operand 229 states and 232 transitions. Second operand has 110 states, 110 states have (on average 2.0272727272727273) internal successors, (223), 109 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:58:46,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:58:46,469 INFO L93 Difference]: Finished difference Result 240 states and 246 transitions. [2022-04-06 14:58:46,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-04-06 14:58:46,469 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.0272727272727273) internal successors, (223), 109 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 227 [2022-04-06 14:58:46,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:58:46,470 INFO L225 Difference]: With dead ends: 240 [2022-04-06 14:58:46,470 INFO L226 Difference]: Without dead ends: 231 [2022-04-06 14:58:46,473 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 671 GetRequests, 348 SyntacticMatches, 0 SemanticMatches, 323 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6306 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=46658, Invalid=58642, Unknown=0, NotChecked=0, Total=105300 [2022-04-06 14:58:46,473 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 115 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:58:46,473 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 59 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:58:46,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-04-06 14:58:46,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2022-04-06 14:58:46,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 226 states have (on average 1.0176991150442478) internal successors, (230), 226 states have internal predecessors, (230), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:58:46,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 234 transitions. [2022-04-06 14:58:46,482 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 234 transitions. Word has length 227 [2022-04-06 14:58:46,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:58:46,482 INFO L478 AbstractCegarLoop]: Abstraction has 231 states and 234 transitions. [2022-04-06 14:58:46,483 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 2.0272727272727273) internal successors, (223), 109 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:58:46,483 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 234 transitions. [2022-04-06 14:58:46,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2022-04-06 14:58:46,483 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:58:46,483 INFO L499 BasicCegarLoop]: trace histogram [109, 107, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:58:46,500 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2022-04-06 14:58:46,700 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,SelfDestructingSolverStorable216,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:58:46,700 INFO L403 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:58:46,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:58:46,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1532472792, now seen corresponding path program 215 times [2022-04-06 14:58:46,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:58:46,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2078600314] [2022-04-06 14:58:46,716 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:58:46,751 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:58:46,751 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:58:46,752 INFO L85 PathProgramCache]: Analyzing trace with hash 860280495, now seen corresponding path program 1 times [2022-04-06 14:58:46,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:58:46,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974414807] [2022-04-06 14:58:46,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:58:46,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:58:46,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:58:46,754 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:58:46,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:58:46,756 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:58:46,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1532472792, now seen corresponding path program 216 times [2022-04-06 14:58:46,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:58:46,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808222423] [2022-04-06 14:58:46,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:58:46,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:58:46,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:58:49,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:58:49,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:58:49,885 INFO L134 CoverageAnalysis]: Checked inductivity of 11881 backedges. 324 proven. 11556 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:58:49,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:58:49,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808222423] [2022-04-06 14:58:49,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808222423] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:58:49,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556824298] [2022-04-06 14:58:49,886 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:58:49,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:58:49,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:58:49,887 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:58:49,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-04-06 14:58:49,913 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 14:58:49,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:58:49,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 14:58:49,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:58:50,268 INFO L134 CoverageAnalysis]: Checked inductivity of 11881 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 11556 trivial. 0 not checked. [2022-04-06 14:58:50,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:58:50,561 INFO L134 CoverageAnalysis]: Checked inductivity of 11881 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 11556 trivial. 0 not checked. [2022-04-06 14:58:50,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556824298] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:58:50,561 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:58:50,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 8, 8] total 121 [2022-04-06 14:58:50,561 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:58:50,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2078600314] [2022-04-06 14:58:50,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2078600314] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:58:50,562 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:58:50,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2022-04-06 14:58:50,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374062946] [2022-04-06 14:58:50,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:58:50,562 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-04-06 14:58:50,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:58:50,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-04-06 14:58:50,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6037, Invalid=8483, Unknown=0, NotChecked=0, Total=14520 [2022-04-06 14:58:50,564 INFO L87 Difference]: Start difference. First operand 231 states and 234 transitions. Second operand has 111 states, 111 states have (on average 2.027027027027027) internal successors, (225), 110 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:58:54,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:58:54,184 INFO L93 Difference]: Finished difference Result 242 states and 248 transitions. [2022-04-06 14:58:54,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-04-06 14:58:54,184 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.027027027027027) internal successors, (225), 110 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 229 [2022-04-06 14:58:54,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:58:54,185 INFO L225 Difference]: With dead ends: 242 [2022-04-06 14:58:54,185 INFO L226 Difference]: Without dead ends: 233 [2022-04-06 14:58:54,187 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 677 GetRequests, 449 SyntacticMatches, 1 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7406 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=18025, Invalid=34187, Unknown=0, NotChecked=0, Total=52212 [2022-04-06 14:58:54,188 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 116 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:58:54,188 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 34 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:58:54,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-04-06 14:58:54,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2022-04-06 14:58:54,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 228 states have (on average 1.0175438596491229) internal successors, (232), 228 states have internal predecessors, (232), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:58:54,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 236 transitions. [2022-04-06 14:58:54,211 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 236 transitions. Word has length 229 [2022-04-06 14:58:54,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:58:54,211 INFO L478 AbstractCegarLoop]: Abstraction has 233 states and 236 transitions. [2022-04-06 14:58:54,212 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 2.027027027027027) internal successors, (225), 110 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:58:54,212 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 236 transitions. [2022-04-06 14:58:54,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-04-06 14:58:54,212 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:58:54,212 INFO L499 BasicCegarLoop]: trace histogram [110, 108, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:58:54,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2022-04-06 14:58:54,412 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,SelfDestructingSolverStorable217,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:58:54,413 INFO L403 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:58:54,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:58:54,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1028635381, now seen corresponding path program 217 times [2022-04-06 14:58:54,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:58:54,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [161218020] [2022-04-06 14:58:54,424 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:58:54,456 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:58:54,456 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:58:54,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1385154641, now seen corresponding path program 1 times [2022-04-06 14:58:54,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:58:54,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380356116] [2022-04-06 14:58:54,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:58:54,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:58:54,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:58:54,459 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:58:54,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:58:54,460 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:58:54,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1028635381, now seen corresponding path program 218 times [2022-04-06 14:58:54,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:58:54,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900686380] [2022-04-06 14:58:54,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:58:54,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:58:54,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:58:56,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:58:56,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:58:56,701 INFO L134 CoverageAnalysis]: Checked inductivity of 12100 backedges. 327 proven. 11772 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:58:56,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:58:56,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900686380] [2022-04-06 14:58:56,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900686380] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:58:56,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367511860] [2022-04-06 14:58:56,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:58:56,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:58:56,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:58:56,706 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:58:56,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-04-06 14:58:56,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:58:56,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:58:56,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 110 conjunts are in the unsatisfiable core [2022-04-06 14:58:56,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:58:56,996 INFO L134 CoverageAnalysis]: Checked inductivity of 12100 backedges. 327 proven. 11772 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:58:56,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:59:03,428 INFO L134 CoverageAnalysis]: Checked inductivity of 12100 backedges. 327 proven. 11772 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:59:03,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367511860] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:59:03,428 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:59:03,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 111, 111] total 222 [2022-04-06 14:59:03,428 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:59:03,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [161218020] [2022-04-06 14:59:03,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [161218020] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:59:03,429 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:59:03,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2022-04-06 14:59:03,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657837779] [2022-04-06 14:59:03,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:59:03,429 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-04-06 14:59:03,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:59:03,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-04-06 14:59:03,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24312, Invalid=24750, Unknown=0, NotChecked=0, Total=49062 [2022-04-06 14:59:03,432 INFO L87 Difference]: Start difference. First operand 233 states and 236 transitions. Second operand has 112 states, 112 states have (on average 2.0267857142857144) internal successors, (227), 111 states have internal predecessors, (227), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:59:06,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:59:06,090 INFO L93 Difference]: Finished difference Result 244 states and 250 transitions. [2022-04-06 14:59:06,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-04-06 14:59:06,090 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 2.0267857142857144) internal successors, (227), 111 states have internal predecessors, (227), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 231 [2022-04-06 14:59:06,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:59:06,090 INFO L225 Difference]: With dead ends: 244 [2022-04-06 14:59:06,090 INFO L226 Difference]: Without dead ends: 235 [2022-04-06 14:59:06,095 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 683 GetRequests, 354 SyntacticMatches, 0 SemanticMatches, 329 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6533 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=48402, Invalid=60828, Unknown=0, NotChecked=0, Total=109230 [2022-04-06 14:59:06,096 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 117 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:59:06,096 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 29 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:59:06,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-04-06 14:59:06,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2022-04-06 14:59:06,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 230 states have (on average 1.017391304347826) internal successors, (234), 230 states have internal predecessors, (234), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:59:06,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 238 transitions. [2022-04-06 14:59:06,105 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 238 transitions. Word has length 231 [2022-04-06 14:59:06,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:59:06,105 INFO L478 AbstractCegarLoop]: Abstraction has 235 states and 238 transitions. [2022-04-06 14:59:06,105 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 2.0267857142857144) internal successors, (227), 111 states have internal predecessors, (227), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:59:06,105 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 238 transitions. [2022-04-06 14:59:06,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2022-04-06 14:59:06,106 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:59:06,106 INFO L499 BasicCegarLoop]: trace histogram [111, 109, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:59:06,122 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2022-04-06 14:59:06,322 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable220,SelfDestructingSolverStorable219 [2022-04-06 14:59:06,322 INFO L403 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:59:06,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:59:06,322 INFO L85 PathProgramCache]: Analyzing trace with hash -2122779438, now seen corresponding path program 219 times [2022-04-06 14:59:06,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:59:06,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1215145122] [2022-04-06 14:59:06,336 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:59:06,357 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:59:06,357 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:59:06,357 INFO L85 PathProgramCache]: Analyzing trace with hash 664377519, now seen corresponding path program 1 times [2022-04-06 14:59:06,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:59:06,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598503464] [2022-04-06 14:59:06,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:59:06,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:59:06,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:59:06,359 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:59:06,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:59:06,364 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:59:06,364 INFO L85 PathProgramCache]: Analyzing trace with hash -2122779438, now seen corresponding path program 220 times [2022-04-06 14:59:06,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:59:06,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133792629] [2022-04-06 14:59:06,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:59:06,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:59:06,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:59:08,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:59:08,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:59:08,824 INFO L134 CoverageAnalysis]: Checked inductivity of 12321 backedges. 330 proven. 11990 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:59:08,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:59:08,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133792629] [2022-04-06 14:59:08,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133792629] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:59:08,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490526218] [2022-04-06 14:59:08,824 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:59:08,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:59:08,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:59:08,825 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:59:08,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-04-06 14:59:08,892 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:59:08,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:59:08,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 111 conjunts are in the unsatisfiable core [2022-04-06 14:59:08,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:59:09,281 INFO L134 CoverageAnalysis]: Checked inductivity of 12321 backedges. 330 proven. 11990 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:59:09,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:59:16,691 INFO L134 CoverageAnalysis]: Checked inductivity of 12321 backedges. 330 proven. 11990 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:59:16,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490526218] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:59:16,691 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:59:16,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 112, 112] total 224 [2022-04-06 14:59:16,691 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:59:16,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1215145122] [2022-04-06 14:59:16,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1215145122] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:59:16,692 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:59:16,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2022-04-06 14:59:16,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796867719] [2022-04-06 14:59:16,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:59:16,692 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-04-06 14:59:16,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:59:16,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-04-06 14:59:16,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24755, Invalid=25197, Unknown=0, NotChecked=0, Total=49952 [2022-04-06 14:59:16,696 INFO L87 Difference]: Start difference. First operand 235 states and 238 transitions. Second operand has 113 states, 113 states have (on average 2.0265486725663715) internal successors, (229), 112 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:59:19,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:59:19,502 INFO L93 Difference]: Finished difference Result 246 states and 252 transitions. [2022-04-06 14:59:19,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-04-06 14:59:19,502 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 2.0265486725663715) internal successors, (229), 112 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 233 [2022-04-06 14:59:19,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:59:19,502 INFO L225 Difference]: With dead ends: 246 [2022-04-06 14:59:19,503 INFO L226 Difference]: Without dead ends: 237 [2022-04-06 14:59:19,507 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 689 GetRequests, 357 SyntacticMatches, 0 SemanticMatches, 332 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6648 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=49286, Invalid=61936, Unknown=0, NotChecked=0, Total=111222 [2022-04-06 14:59:19,507 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 118 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:59:19,507 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 39 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:59:19,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-04-06 14:59:19,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2022-04-06 14:59:19,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 232 states have (on average 1.0172413793103448) internal successors, (236), 232 states have internal predecessors, (236), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:59:19,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 240 transitions. [2022-04-06 14:59:19,515 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 240 transitions. Word has length 233 [2022-04-06 14:59:19,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:59:19,516 INFO L478 AbstractCegarLoop]: Abstraction has 237 states and 240 transitions. [2022-04-06 14:59:19,516 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 2.0265486725663715) internal successors, (229), 112 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:59:19,516 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 240 transitions. [2022-04-06 14:59:19,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-04-06 14:59:19,516 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:59:19,516 INFO L499 BasicCegarLoop]: trace histogram [112, 110, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:59:19,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2022-04-06 14:59:19,731 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221,SelfDestructingSolverStorable222 [2022-04-06 14:59:19,732 INFO L403 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:59:19,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:59:19,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1614490479, now seen corresponding path program 221 times [2022-04-06 14:59:19,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:59:19,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1012675312] [2022-04-06 14:59:19,757 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:59:19,784 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:59:19,785 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:59:19,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1581057617, now seen corresponding path program 1 times [2022-04-06 14:59:19,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:59:19,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537364650] [2022-04-06 14:59:19,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:59:19,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:59:19,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:59:19,787 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:59:19,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:59:19,789 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:59:19,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1614490479, now seen corresponding path program 222 times [2022-04-06 14:59:19,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:59:19,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896208004] [2022-04-06 14:59:19,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:59:19,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:59:19,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:59:22,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:59:22,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:59:22,716 INFO L134 CoverageAnalysis]: Checked inductivity of 12544 backedges. 333 proven. 12210 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:59:22,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:59:22,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896208004] [2022-04-06 14:59:22,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896208004] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:59:22,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748854295] [2022-04-06 14:59:22,717 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:59:22,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:59:22,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:59:22,718 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:59:22,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-04-06 14:59:22,743 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 14:59:22,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:59:22,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 14:59:22,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:59:23,218 INFO L134 CoverageAnalysis]: Checked inductivity of 12544 backedges. 0 proven. 334 refuted. 0 times theorem prover too weak. 12210 trivial. 0 not checked. [2022-04-06 14:59:23,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:59:23,582 INFO L134 CoverageAnalysis]: Checked inductivity of 12544 backedges. 0 proven. 334 refuted. 0 times theorem prover too weak. 12210 trivial. 0 not checked. [2022-04-06 14:59:23,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748854295] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:59:23,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:59:23,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [114, 8, 8] total 124 [2022-04-06 14:59:23,582 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:59:23,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1012675312] [2022-04-06 14:59:23,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1012675312] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:59:23,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:59:23,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2022-04-06 14:59:23,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123631082] [2022-04-06 14:59:23,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:59:23,583 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-04-06 14:59:23,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:59:23,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-04-06 14:59:23,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6370, Invalid=8882, Unknown=0, NotChecked=0, Total=15252 [2022-04-06 14:59:23,584 INFO L87 Difference]: Start difference. First operand 237 states and 240 transitions. Second operand has 114 states, 114 states have (on average 2.026315789473684) internal successors, (231), 113 states have internal predecessors, (231), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:59:26,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:59:26,839 INFO L93 Difference]: Finished difference Result 248 states and 254 transitions. [2022-04-06 14:59:26,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-04-06 14:59:26,839 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 2.026315789473684) internal successors, (231), 113 states have internal predecessors, (231), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 235 [2022-04-06 14:59:26,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:59:26,839 INFO L225 Difference]: With dead ends: 248 [2022-04-06 14:59:26,839 INFO L226 Difference]: Without dead ends: 239 [2022-04-06 14:59:26,843 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 695 GetRequests, 461 SyntacticMatches, 1 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7778 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=19024, Invalid=35966, Unknown=0, NotChecked=0, Total=54990 [2022-04-06 14:59:26,843 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 119 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:59:26,843 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 29 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:59:26,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-04-06 14:59:26,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2022-04-06 14:59:26,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 234 states have (on average 1.017094017094017) internal successors, (238), 234 states have internal predecessors, (238), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:59:26,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 242 transitions. [2022-04-06 14:59:26,851 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 242 transitions. Word has length 235 [2022-04-06 14:59:26,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:59:26,852 INFO L478 AbstractCegarLoop]: Abstraction has 239 states and 242 transitions. [2022-04-06 14:59:26,852 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 2.026315789473684) internal successors, (231), 113 states have internal predecessors, (231), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:59:26,852 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 242 transitions. [2022-04-06 14:59:26,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2022-04-06 14:59:26,852 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:59:26,852 INFO L499 BasicCegarLoop]: trace histogram [113, 111, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:59:26,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2022-04-06 14:59:27,066 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223,SelfDestructingSolverStorable224 [2022-04-06 14:59:27,066 INFO L403 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:59:27,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:59:27,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1756746036, now seen corresponding path program 223 times [2022-04-06 14:59:27,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:59:27,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [312271458] [2022-04-06 14:59:27,082 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:59:27,105 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:59:27,105 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:59:27,105 INFO L85 PathProgramCache]: Analyzing trace with hash 468474543, now seen corresponding path program 1 times [2022-04-06 14:59:27,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:59:27,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767441994] [2022-04-06 14:59:27,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:59:27,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:59:27,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:59:27,107 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:59:27,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:59:27,109 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:59:27,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1756746036, now seen corresponding path program 224 times [2022-04-06 14:59:27,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:59:27,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91757276] [2022-04-06 14:59:27,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:59:27,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:59:27,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:59:29,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:59:29,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:59:29,567 INFO L134 CoverageAnalysis]: Checked inductivity of 12769 backedges. 336 proven. 12432 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:59:29,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:59:29,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91757276] [2022-04-06 14:59:29,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91757276] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:59:29,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634577193] [2022-04-06 14:59:29,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:59:29,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:59:29,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:59:29,568 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:59:29,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-04-06 14:59:29,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:59:29,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:59:29,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 113 conjunts are in the unsatisfiable core [2022-04-06 14:59:29,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:59:29,822 INFO L134 CoverageAnalysis]: Checked inductivity of 12769 backedges. 336 proven. 12432 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:59:29,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:59:37,174 INFO L134 CoverageAnalysis]: Checked inductivity of 12769 backedges. 336 proven. 12432 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:59:37,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634577193] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:59:37,174 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:59:37,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [115, 114, 114] total 228 [2022-04-06 14:59:37,174 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:59:37,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [312271458] [2022-04-06 14:59:37,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [312271458] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:59:37,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:59:37,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [115] imperfect sequences [] total 115 [2022-04-06 14:59:37,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003567948] [2022-04-06 14:59:37,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:59:37,175 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-04-06 14:59:37,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:59:37,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-04-06 14:59:37,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25653, Invalid=26103, Unknown=0, NotChecked=0, Total=51756 [2022-04-06 14:59:37,179 INFO L87 Difference]: Start difference. First operand 239 states and 242 transitions. Second operand has 115 states, 115 states have (on average 2.026086956521739) internal successors, (233), 114 states have internal predecessors, (233), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:59:41,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:59:41,339 INFO L93 Difference]: Finished difference Result 250 states and 256 transitions. [2022-04-06 14:59:41,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-04-06 14:59:41,340 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 2.026086956521739) internal successors, (233), 114 states have internal predecessors, (233), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 237 [2022-04-06 14:59:41,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:59:41,340 INFO L225 Difference]: With dead ends: 250 [2022-04-06 14:59:41,340 INFO L226 Difference]: Without dead ends: 241 [2022-04-06 14:59:41,343 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 701 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 338 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6881 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=51078, Invalid=64182, Unknown=0, NotChecked=0, Total=115260 [2022-04-06 14:59:41,344 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 120 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:59:41,344 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 44 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:59:41,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-04-06 14:59:41,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2022-04-06 14:59:41,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 236 states have (on average 1.0169491525423728) internal successors, (240), 236 states have internal predecessors, (240), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:59:41,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 244 transitions. [2022-04-06 14:59:41,352 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 244 transitions. Word has length 237 [2022-04-06 14:59:41,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:59:41,353 INFO L478 AbstractCegarLoop]: Abstraction has 241 states and 244 transitions. [2022-04-06 14:59:41,353 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 2.026086956521739) internal successors, (233), 114 states have internal predecessors, (233), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:59:41,353 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 244 transitions. [2022-04-06 14:59:41,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-04-06 14:59:41,354 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:59:41,354 INFO L499 BasicCegarLoop]: trace histogram [114, 112, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:59:41,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2022-04-06 14:59:41,569 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225,SelfDestructingSolverStorable226 [2022-04-06 14:59:41,570 INFO L403 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:59:41,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:59:41,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1185271529, now seen corresponding path program 225 times [2022-04-06 14:59:41,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:59:41,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1639251778] [2022-04-06 14:59:41,584 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:59:41,604 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:59:41,605 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:59:41,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1776960593, now seen corresponding path program 1 times [2022-04-06 14:59:41,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:59:41,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051927841] [2022-04-06 14:59:41,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:59:41,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:59:41,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:59:41,607 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:59:41,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:59:41,608 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:59:41,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1185271529, now seen corresponding path program 226 times [2022-04-06 14:59:41,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:59:41,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821610009] [2022-04-06 14:59:41,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:59:41,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:59:41,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:59:44,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:59:44,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:59:44,218 INFO L134 CoverageAnalysis]: Checked inductivity of 12996 backedges. 339 proven. 12656 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:59:44,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:59:44,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821610009] [2022-04-06 14:59:44,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821610009] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:59:44,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844796979] [2022-04-06 14:59:44,218 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:59:44,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:59:44,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:59:44,227 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:59:44,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-04-06 14:59:44,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:59:44,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:59:44,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 114 conjunts are in the unsatisfiable core [2022-04-06 14:59:44,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:59:44,700 INFO L134 CoverageAnalysis]: Checked inductivity of 12996 backedges. 339 proven. 12656 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:59:44,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:59:52,811 INFO L134 CoverageAnalysis]: Checked inductivity of 12996 backedges. 339 proven. 12656 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:59:52,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844796979] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:59:52,811 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:59:52,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [116, 115, 115] total 230 [2022-04-06 14:59:52,811 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:59:52,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1639251778] [2022-04-06 14:59:52,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1639251778] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:59:52,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:59:52,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2022-04-06 14:59:52,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201330113] [2022-04-06 14:59:52,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:59:52,812 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-04-06 14:59:52,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:59:52,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-04-06 14:59:52,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26108, Invalid=26562, Unknown=0, NotChecked=0, Total=52670 [2022-04-06 14:59:52,816 INFO L87 Difference]: Start difference. First operand 241 states and 244 transitions. Second operand has 116 states, 116 states have (on average 2.0258620689655173) internal successors, (235), 115 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:59:55,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:59:55,792 INFO L93 Difference]: Finished difference Result 252 states and 258 transitions. [2022-04-06 14:59:55,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-04-06 14:59:55,792 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.0258620689655173) internal successors, (235), 115 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 239 [2022-04-06 14:59:55,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:59:55,793 INFO L225 Difference]: With dead ends: 252 [2022-04-06 14:59:55,793 INFO L226 Difference]: Without dead ends: 243 [2022-04-06 14:59:55,797 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 707 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 341 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6999 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=51986, Invalid=65320, Unknown=0, NotChecked=0, Total=117306 [2022-04-06 14:59:55,797 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 121 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:59:55,797 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 24 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:59:55,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-04-06 14:59:55,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 243. [2022-04-06 14:59:55,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 238 states have (on average 1.0168067226890756) internal successors, (242), 238 states have internal predecessors, (242), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:59:55,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 246 transitions. [2022-04-06 14:59:55,806 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 246 transitions. Word has length 239 [2022-04-06 14:59:55,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:59:55,806 INFO L478 AbstractCegarLoop]: Abstraction has 243 states and 246 transitions. [2022-04-06 14:59:55,806 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 2.0258620689655173) internal successors, (235), 115 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:59:55,806 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 246 transitions. [2022-04-06 14:59:55,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2022-04-06 14:59:55,807 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:59:55,807 INFO L499 BasicCegarLoop]: trace histogram [115, 113, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:59:55,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2022-04-06 14:59:56,022 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,SelfDestructingSolverStorable228,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:59:56,022 INFO L403 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:59:56,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:59:56,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1919296570, now seen corresponding path program 227 times [2022-04-06 14:59:56,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:59:56,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [517658150] [2022-04-06 14:59:56,045 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:59:56,078 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:59:56,079 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:59:56,079 INFO L85 PathProgramCache]: Analyzing trace with hash 272571567, now seen corresponding path program 1 times [2022-04-06 14:59:56,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:59:56,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797243023] [2022-04-06 14:59:56,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:59:56,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:59:56,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:59:56,081 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:59:56,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:59:56,083 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:59:56,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1919296570, now seen corresponding path program 228 times [2022-04-06 14:59:56,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:59:56,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709931480] [2022-04-06 14:59:56,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:59:56,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:59:56,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:59:58,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:59:58,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:59:58,923 INFO L134 CoverageAnalysis]: Checked inductivity of 13225 backedges. 342 proven. 12882 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:59:58,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:59:58,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709931480] [2022-04-06 14:59:58,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709931480] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:59:58,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282272794] [2022-04-06 14:59:58,924 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:59:58,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:59:58,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:59:58,925 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:59:58,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-04-06 14:59:58,963 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 14:59:58,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:59:58,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 14:59:58,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:59:59,331 INFO L134 CoverageAnalysis]: Checked inductivity of 13225 backedges. 0 proven. 343 refuted. 0 times theorem prover too weak. 12882 trivial. 0 not checked. [2022-04-06 14:59:59,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:59:59,633 INFO L134 CoverageAnalysis]: Checked inductivity of 13225 backedges. 0 proven. 343 refuted. 0 times theorem prover too weak. 12882 trivial. 0 not checked. [2022-04-06 14:59:59,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282272794] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:59:59,633 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:59:59,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 8, 8] total 127 [2022-04-06 14:59:59,634 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:59:59,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [517658150] [2022-04-06 14:59:59,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [517658150] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:59:59,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:59:59,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [117] imperfect sequences [] total 117 [2022-04-06 14:59:59,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413133289] [2022-04-06 14:59:59,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:59:59,634 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-04-06 14:59:59,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:59:59,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-04-06 14:59:59,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6712, Invalid=9290, Unknown=0, NotChecked=0, Total=16002 [2022-04-06 14:59:59,636 INFO L87 Difference]: Start difference. First operand 243 states and 246 transitions. Second operand has 117 states, 117 states have (on average 2.0256410256410255) internal successors, (237), 116 states have internal predecessors, (237), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 15:00:03,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:00:03,325 INFO L93 Difference]: Finished difference Result 254 states and 260 transitions. [2022-04-06 15:00:03,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-04-06 15:00:03,326 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 2.0256410256410255) internal successors, (237), 116 states have internal predecessors, (237), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 241 [2022-04-06 15:00:03,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:00:03,326 INFO L225 Difference]: With dead ends: 254 [2022-04-06 15:00:03,326 INFO L226 Difference]: Without dead ends: 245 [2022-04-06 15:00:03,328 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 713 GetRequests, 473 SyntacticMatches, 1 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8159 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=20050, Invalid=37790, Unknown=0, NotChecked=0, Total=57840 [2022-04-06 15:00:03,328 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 122 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 15:00:03,329 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 34 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 15:00:03,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-04-06 15:00:03,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 245. [2022-04-06 15:00:03,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 240 states have (on average 1.0166666666666666) internal successors, (244), 240 states have internal predecessors, (244), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 15:00:03,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 248 transitions. [2022-04-06 15:00:03,338 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 248 transitions. Word has length 241 [2022-04-06 15:00:03,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:00:03,338 INFO L478 AbstractCegarLoop]: Abstraction has 245 states and 248 transitions. [2022-04-06 15:00:03,338 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 2.0256410256410255) internal successors, (237), 116 states have internal predecessors, (237), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 15:00:03,338 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 248 transitions. [2022-04-06 15:00:03,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-04-06 15:00:03,339 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:00:03,339 INFO L499 BasicCegarLoop]: trace histogram [116, 114, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:00:03,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2022-04-06 15:00:03,554 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,SelfDestructingSolverStorable229,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:00:03,554 INFO L403 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:00:03,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:00:03,555 INFO L85 PathProgramCache]: Analyzing trace with hash -406968989, now seen corresponding path program 229 times [2022-04-06 15:00:03,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:00:03,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1912778610] [2022-04-06 15:00:03,569 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 15:00:03,602 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 15:00:03,602 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:00:03,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1972863569, now seen corresponding path program 1 times [2022-04-06 15:00:03,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:00:03,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934039474] [2022-04-06 15:00:03,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:00:03,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:00:03,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 15:00:03,605 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 15:00:03,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 15:00:03,606 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 15:00:03,607 INFO L85 PathProgramCache]: Analyzing trace with hash -406968989, now seen corresponding path program 230 times [2022-04-06 15:00:03,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:00:03,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316901126] [2022-04-06 15:00:03,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:00:03,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:00:03,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:00:07,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:00:07,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:00:07,271 INFO L134 CoverageAnalysis]: Checked inductivity of 13456 backedges. 345 proven. 13110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:00:07,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:00:07,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316901126] [2022-04-06 15:00:07,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316901126] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:00:07,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635537009] [2022-04-06 15:00:07,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 15:00:07,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:00:07,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:00:07,273 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:00:07,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-04-06 15:00:07,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 15:00:07,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:00:07,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 116 conjunts are in the unsatisfiable core [2022-04-06 15:00:07,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:00:07,564 INFO L134 CoverageAnalysis]: Checked inductivity of 13456 backedges. 345 proven. 13110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:00:07,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:00:18,893 INFO L134 CoverageAnalysis]: Checked inductivity of 13456 backedges. 345 proven. 13110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:00:18,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635537009] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:00:18,894 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 15:00:18,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [118, 117, 117] total 234 [2022-04-06 15:00:18,894 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:00:18,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1912778610] [2022-04-06 15:00:18,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1912778610] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:00:18,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:00:18,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2022-04-06 15:00:18,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674467974] [2022-04-06 15:00:18,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:00:18,894 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-04-06 15:00:18,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:00:18,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-04-06 15:00:18,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27030, Invalid=27492, Unknown=0, NotChecked=0, Total=54522 [2022-04-06 15:00:18,899 INFO L87 Difference]: Start difference. First operand 245 states and 248 transitions. Second operand has 118 states, 118 states have (on average 2.0254237288135593) internal successors, (239), 117 states have internal predecessors, (239), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 15:00:23,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:00:23,598 INFO L93 Difference]: Finished difference Result 256 states and 262 transitions. [2022-04-06 15:00:23,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-04-06 15:00:23,598 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 2.0254237288135593) internal successors, (239), 117 states have internal predecessors, (239), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 243 [2022-04-06 15:00:23,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:00:23,599 INFO L225 Difference]: With dead ends: 256 [2022-04-06 15:00:23,599 INFO L226 Difference]: Without dead ends: 247 [2022-04-06 15:00:23,604 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 719 GetRequests, 372 SyntacticMatches, 0 SemanticMatches, 347 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7238 ImplicationChecksByTransitivity, 18.8s TimeCoverageRelationStatistics Valid=53826, Invalid=67626, Unknown=0, NotChecked=0, Total=121452 [2022-04-06 15:00:23,604 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 123 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 15:00:23,604 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 44 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 15:00:23,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-04-06 15:00:23,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2022-04-06 15:00:23,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 242 states have (on average 1.0165289256198347) internal successors, (246), 242 states have internal predecessors, (246), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 15:00:23,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 250 transitions. [2022-04-06 15:00:23,614 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 250 transitions. Word has length 243 [2022-04-06 15:00:23,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:00:23,615 INFO L478 AbstractCegarLoop]: Abstraction has 247 states and 250 transitions. [2022-04-06 15:00:23,615 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 2.0254237288135593) internal successors, (239), 117 states have internal predecessors, (239), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 15:00:23,615 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 250 transitions. [2022-04-06 15:00:23,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2022-04-06 15:00:23,616 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:00:23,616 INFO L499 BasicCegarLoop]: trace histogram [117, 115, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:00:23,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2022-04-06 15:00:23,827 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2022-04-06 15:00:23,827 INFO L403 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:00:23,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:00:23,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1240890304, now seen corresponding path program 231 times [2022-04-06 15:00:23,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:00:23,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1752317770] [2022-04-06 15:00:23,845 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 15:00:23,891 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 15:00:23,891 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:00:23,892 INFO L85 PathProgramCache]: Analyzing trace with hash 76668591, now seen corresponding path program 1 times [2022-04-06 15:00:23,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:00:23,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069022927] [2022-04-06 15:00:23,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:00:23,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:00:23,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 15:00:23,894 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 15:00:23,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 15:00:23,896 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 15:00:23,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1240890304, now seen corresponding path program 232 times [2022-04-06 15:00:23,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:00:23,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355091270] [2022-04-06 15:00:23,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:00:23,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:00:23,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:00:27,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:00:27,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:00:27,472 INFO L134 CoverageAnalysis]: Checked inductivity of 13689 backedges. 348 proven. 13340 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:00:27,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:00:27,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355091270] [2022-04-06 15:00:27,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355091270] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:00:27,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089076424] [2022-04-06 15:00:27,473 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 15:00:27,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:00:27,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:00:27,476 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:00:27,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-04-06 15:00:27,542 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 15:00:27,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:00:27,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 117 conjunts are in the unsatisfiable core [2022-04-06 15:00:27,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:00:27,877 INFO L134 CoverageAnalysis]: Checked inductivity of 13689 backedges. 348 proven. 13340 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:00:27,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:00:38,416 INFO L134 CoverageAnalysis]: Checked inductivity of 13689 backedges. 348 proven. 13340 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:00:38,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089076424] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:00:38,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 15:00:38,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [119, 118, 118] total 236 [2022-04-06 15:00:38,416 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:00:38,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1752317770] [2022-04-06 15:00:38,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1752317770] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:00:38,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:00:38,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [119] imperfect sequences [] total 119 [2022-04-06 15:00:38,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452117192] [2022-04-06 15:00:38,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:00:38,417 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-04-06 15:00:38,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:00:38,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-04-06 15:00:38,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27497, Invalid=27963, Unknown=0, NotChecked=0, Total=55460 [2022-04-06 15:00:38,420 INFO L87 Difference]: Start difference. First operand 247 states and 250 transitions. Second operand has 119 states, 119 states have (on average 2.0252100840336134) internal successors, (241), 118 states have internal predecessors, (241), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 15:00:42,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:00:42,902 INFO L93 Difference]: Finished difference Result 258 states and 264 transitions. [2022-04-06 15:00:42,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-04-06 15:00:42,902 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 2.0252100840336134) internal successors, (241), 118 states have internal predecessors, (241), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 245 [2022-04-06 15:00:42,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:00:42,902 INFO L225 Difference]: With dead ends: 258 [2022-04-06 15:00:42,903 INFO L226 Difference]: Without dead ends: 249 [2022-04-06 15:00:42,907 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 725 GetRequests, 375 SyntacticMatches, 0 SemanticMatches, 350 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7359 ImplicationChecksByTransitivity, 17.7s TimeCoverageRelationStatistics Valid=54758, Invalid=68794, Unknown=0, NotChecked=0, Total=123552 [2022-04-06 15:00:42,907 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 124 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 15:00:42,907 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 39 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 15:00:42,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-04-06 15:00:42,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2022-04-06 15:00:42,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 244 states have (on average 1.0163934426229508) internal successors, (248), 244 states have internal predecessors, (248), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 15:00:42,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 252 transitions. [2022-04-06 15:00:42,927 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 252 transitions. Word has length 245 [2022-04-06 15:00:42,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:00:42,927 INFO L478 AbstractCegarLoop]: Abstraction has 249 states and 252 transitions. [2022-04-06 15:00:42,928 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 2.0252100840336134) internal successors, (241), 118 states have internal predecessors, (241), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 15:00:42,928 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 252 transitions. [2022-04-06 15:00:42,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2022-04-06 15:00:42,928 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:00:42,928 INFO L499 BasicCegarLoop]: trace histogram [118, 116, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:00:42,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2022-04-06 15:00:43,159 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233,SelfDestructingSolverStorable234 [2022-04-06 15:00:43,159 INFO L403 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:00:43,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:00:43,159 INFO L85 PathProgramCache]: Analyzing trace with hash -9261347, now seen corresponding path program 233 times [2022-04-06 15:00:43,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:00:43,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1168973564] [2022-04-06 15:00:43,175 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 15:00:43,218 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 15:00:43,219 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:00:43,219 INFO L85 PathProgramCache]: Analyzing trace with hash 2126200751, now seen corresponding path program 1 times [2022-04-06 15:00:43,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:00:43,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93308241] [2022-04-06 15:00:43,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:00:43,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:00:43,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 15:00:43,221 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 15:00:43,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 15:00:43,222 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 15:00:43,222 INFO L85 PathProgramCache]: Analyzing trace with hash -9261347, now seen corresponding path program 234 times [2022-04-06 15:00:43,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:00:43,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8257533] [2022-04-06 15:00:43,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:00:43,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:00:43,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:00:46,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:00:46,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:00:46,677 INFO L134 CoverageAnalysis]: Checked inductivity of 13924 backedges. 351 proven. 13572 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:00:46,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:00:46,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8257533] [2022-04-06 15:00:46,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8257533] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:00:46,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153858485] [2022-04-06 15:00:46,677 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 15:00:46,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:00:46,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:00:46,678 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:00:46,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-04-06 15:00:46,711 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 15:00:46,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:00:46,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 15:00:46,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:00:47,301 INFO L134 CoverageAnalysis]: Checked inductivity of 13924 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 13572 trivial. 0 not checked. [2022-04-06 15:00:47,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:00:47,817 INFO L134 CoverageAnalysis]: Checked inductivity of 13924 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 13572 trivial. 0 not checked. [2022-04-06 15:00:47,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153858485] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:00:47,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 15:00:47,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [120, 8, 8] total 130 [2022-04-06 15:00:47,818 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:00:47,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1168973564] [2022-04-06 15:00:47,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1168973564] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:00:47,818 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:00:47,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2022-04-06 15:00:47,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357505985] [2022-04-06 15:00:47,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:00:47,819 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-04-06 15:00:47,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:00:47,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-04-06 15:00:47,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7063, Invalid=9707, Unknown=0, NotChecked=0, Total=16770 [2022-04-06 15:00:47,820 INFO L87 Difference]: Start difference. First operand 249 states and 252 transitions. Second operand has 120 states, 120 states have (on average 2.025) internal successors, (243), 119 states have internal predecessors, (243), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 15:00:52,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:00:52,156 INFO L93 Difference]: Finished difference Result 260 states and 266 transitions. [2022-04-06 15:00:52,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-04-06 15:00:52,157 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 2.025) internal successors, (243), 119 states have internal predecessors, (243), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 247 [2022-04-06 15:00:52,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:00:52,157 INFO L225 Difference]: With dead ends: 260 [2022-04-06 15:00:52,157 INFO L226 Difference]: Without dead ends: 251 [2022-04-06 15:00:52,159 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 731 GetRequests, 485 SyntacticMatches, 1 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8549 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=21103, Invalid=39659, Unknown=0, NotChecked=0, Total=60762 [2022-04-06 15:00:52,159 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 125 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 15:00:52,159 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 39 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 15:00:52,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-04-06 15:00:52,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2022-04-06 15:00:52,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 246 states have (on average 1.016260162601626) internal successors, (250), 246 states have internal predecessors, (250), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 15:00:52,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 254 transitions. [2022-04-06 15:00:52,168 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 254 transitions. Word has length 247 [2022-04-06 15:00:52,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:00:52,168 INFO L478 AbstractCegarLoop]: Abstraction has 251 states and 254 transitions. [2022-04-06 15:00:52,168 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 2.025) internal successors, (243), 119 states have internal predecessors, (243), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 15:00:52,169 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 254 transitions. [2022-04-06 15:00:52,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2022-04-06 15:00:52,169 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:00:52,169 INFO L499 BasicCegarLoop]: trace histogram [119, 117, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:00:52,185 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2022-04-06 15:00:52,383 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2022-04-06 15:00:52,384 INFO L403 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:00:52,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:00:52,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1185844922, now seen corresponding path program 235 times [2022-04-06 15:00:52,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:00:52,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [713461580] [2022-04-06 15:00:52,398 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 15:00:52,444 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 15:00:52,444 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:00:52,444 INFO L85 PathProgramCache]: Analyzing trace with hash -119234385, now seen corresponding path program 1 times [2022-04-06 15:00:52,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:00:52,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713272725] [2022-04-06 15:00:52,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:00:52,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:00:52,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 15:00:52,446 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 15:00:52,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 15:00:52,461 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 15:00:52,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1185844922, now seen corresponding path program 236 times [2022-04-06 15:00:52,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:00:52,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627382678] [2022-04-06 15:00:52,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:00:52,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:00:52,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:00:55,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:00:55,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:00:55,831 INFO L134 CoverageAnalysis]: Checked inductivity of 14161 backedges. 354 proven. 13806 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:00:55,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:00:55,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627382678] [2022-04-06 15:00:55,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627382678] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:00:55,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170684557] [2022-04-06 15:00:55,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 15:00:55,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:00:55,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:00:55,832 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:00:55,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-04-06 15:00:55,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 15:00:55,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:00:55,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 119 conjunts are in the unsatisfiable core [2022-04-06 15:00:55,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:00:56,214 INFO L134 CoverageAnalysis]: Checked inductivity of 14161 backedges. 354 proven. 13806 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:00:56,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:01:05,541 INFO L134 CoverageAnalysis]: Checked inductivity of 14161 backedges. 354 proven. 13806 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:01:05,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170684557] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:01:05,541 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 15:01:05,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [121, 120, 120] total 240 [2022-04-06 15:01:05,541 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:01:05,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [713461580] [2022-04-06 15:01:05,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [713461580] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:01:05,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:01:05,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [121] imperfect sequences [] total 121 [2022-04-06 15:01:05,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425525991] [2022-04-06 15:01:05,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:01:05,542 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-04-06 15:01:05,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:01:05,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-04-06 15:01:05,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28443, Invalid=28917, Unknown=0, NotChecked=0, Total=57360 [2022-04-06 15:01:05,545 INFO L87 Difference]: Start difference. First operand 251 states and 254 transitions. Second operand has 121 states, 121 states have (on average 2.024793388429752) internal successors, (245), 120 states have internal predecessors, (245), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 15:01:10,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:01:10,093 INFO L93 Difference]: Finished difference Result 262 states and 268 transitions. [2022-04-06 15:01:10,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-04-06 15:01:10,094 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 2.024793388429752) internal successors, (245), 120 states have internal predecessors, (245), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 249 [2022-04-06 15:01:10,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:01:10,094 INFO L225 Difference]: With dead ends: 262 [2022-04-06 15:01:10,094 INFO L226 Difference]: Without dead ends: 253 [2022-04-06 15:01:10,100 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 737 GetRequests, 381 SyntacticMatches, 0 SemanticMatches, 356 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7604 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=56646, Invalid=71160, Unknown=0, NotChecked=0, Total=127806 [2022-04-06 15:01:10,100 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 126 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 15:01:10,101 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 34 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 15:01:10,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-04-06 15:01:10,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2022-04-06 15:01:10,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 248 states have (on average 1.0161290322580645) internal successors, (252), 248 states have internal predecessors, (252), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 15:01:10,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 256 transitions. [2022-04-06 15:01:10,110 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 256 transitions. Word has length 249 [2022-04-06 15:01:10,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:01:10,110 INFO L478 AbstractCegarLoop]: Abstraction has 253 states and 256 transitions. [2022-04-06 15:01:10,111 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 2.024793388429752) internal successors, (245), 120 states have internal predecessors, (245), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 15:01:10,111 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 256 transitions. [2022-04-06 15:01:10,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2022-04-06 15:01:10,111 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:01:10,111 INFO L499 BasicCegarLoop]: trace histogram [120, 118, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:01:10,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2022-04-06 15:01:10,316 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237,SelfDestructingSolverStorable238 [2022-04-06 15:01:10,317 INFO L403 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:01:10,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:01:10,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1368265897, now seen corresponding path program 237 times [2022-04-06 15:01:10,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:01:10,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1300748603] [2022-04-06 15:01:10,330 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 15:01:10,373 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 15:01:10,373 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:01:10,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1930297775, now seen corresponding path program 1 times [2022-04-06 15:01:10,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:01:10,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908921040] [2022-04-06 15:01:10,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:01:10,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:01:10,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 15:01:10,376 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 15:01:10,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 15:01:10,377 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 15:01:10,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1368265897, now seen corresponding path program 238 times [2022-04-06 15:01:10,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:01:10,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490598564] [2022-04-06 15:01:10,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:01:10,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:01:10,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:01:14,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:01:14,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:01:14,241 INFO L134 CoverageAnalysis]: Checked inductivity of 14400 backedges. 357 proven. 14042 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:01:14,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:01:14,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490598564] [2022-04-06 15:01:14,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490598564] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:01:14,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545843564] [2022-04-06 15:01:14,241 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 15:01:14,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:01:14,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:01:14,242 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:01:14,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-04-06 15:01:14,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 15:01:14,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:01:14,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 120 conjunts are in the unsatisfiable core [2022-04-06 15:01:14,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:01:14,723 INFO L134 CoverageAnalysis]: Checked inductivity of 14400 backedges. 357 proven. 14042 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:01:14,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:01:26,279 INFO L134 CoverageAnalysis]: Checked inductivity of 14400 backedges. 357 proven. 14042 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:01:26,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545843564] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:01:26,279 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 15:01:26,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [122, 121, 121] total 242 [2022-04-06 15:01:26,280 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:01:26,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1300748603] [2022-04-06 15:01:26,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1300748603] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:01:26,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:01:26,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [122] imperfect sequences [] total 122 [2022-04-06 15:01:26,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944420327] [2022-04-06 15:01:26,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:01:26,280 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-04-06 15:01:26,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:01:26,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-04-06 15:01:26,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28922, Invalid=29400, Unknown=0, NotChecked=0, Total=58322 [2022-04-06 15:01:26,283 INFO L87 Difference]: Start difference. First operand 253 states and 256 transitions. Second operand has 122 states, 122 states have (on average 2.0245901639344264) internal successors, (247), 121 states have internal predecessors, (247), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 15:01:30,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:01:30,121 INFO L93 Difference]: Finished difference Result 264 states and 270 transitions. [2022-04-06 15:01:30,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-04-06 15:01:30,121 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 2.0245901639344264) internal successors, (247), 121 states have internal predecessors, (247), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 251 [2022-04-06 15:01:30,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:01:30,121 INFO L225 Difference]: With dead ends: 264 [2022-04-06 15:01:30,121 INFO L226 Difference]: Without dead ends: 255 [2022-04-06 15:01:30,125 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 743 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 359 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7728 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=57602, Invalid=72358, Unknown=0, NotChecked=0, Total=129960 [2022-04-06 15:01:30,125 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 127 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 15:01:30,125 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 24 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 15:01:30,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-04-06 15:01:30,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 255. [2022-04-06 15:01:30,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 250 states have (on average 1.016) internal successors, (254), 250 states have internal predecessors, (254), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 15:01:30,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 258 transitions. [2022-04-06 15:01:30,134 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 258 transitions. Word has length 251 [2022-04-06 15:01:30,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:01:30,134 INFO L478 AbstractCegarLoop]: Abstraction has 255 states and 258 transitions. [2022-04-06 15:01:30,134 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 2.0245901639344264) internal successors, (247), 121 states have internal predecessors, (247), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 15:01:30,134 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 258 transitions. [2022-04-06 15:01:30,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-04-06 15:01:30,135 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:01:30,135 INFO L499 BasicCegarLoop]: trace histogram [121, 119, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:01:30,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2022-04-06 15:01:30,351 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2022-04-06 15:01:30,351 INFO L403 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:01:30,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:01:30,351 INFO L85 PathProgramCache]: Analyzing trace with hash 852530356, now seen corresponding path program 239 times [2022-04-06 15:01:30,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:01:30,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1951439081] [2022-04-06 15:01:30,368 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 15:01:30,393 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 15:01:30,393 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:01:30,393 INFO L85 PathProgramCache]: Analyzing trace with hash -315137361, now seen corresponding path program 1 times [2022-04-06 15:01:30,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:01:30,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862309582] [2022-04-06 15:01:30,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:01:30,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:01:30,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 15:01:30,396 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 15:01:30,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 15:01:30,397 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 15:01:30,397 INFO L85 PathProgramCache]: Analyzing trace with hash 852530356, now seen corresponding path program 240 times [2022-04-06 15:01:30,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:01:30,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121812810] [2022-04-06 15:01:30,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:01:30,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:01:30,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:01:32,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:01:32,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:01:32,911 INFO L134 CoverageAnalysis]: Checked inductivity of 14641 backedges. 360 proven. 14280 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:01:32,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:01:32,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121812810] [2022-04-06 15:01:32,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121812810] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:01:32,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565714410] [2022-04-06 15:01:32,912 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 15:01:32,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:01:32,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:01:32,913 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:01:32,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-04-06 15:01:32,944 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 15:01:32,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:01:32,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 15:01:32,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:01:33,276 INFO L134 CoverageAnalysis]: Checked inductivity of 14641 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 14280 trivial. 0 not checked. [2022-04-06 15:01:33,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:01:33,607 INFO L134 CoverageAnalysis]: Checked inductivity of 14641 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 14280 trivial. 0 not checked. [2022-04-06 15:01:33,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565714410] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:01:33,608 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 15:01:33,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [123, 8, 8] total 133 [2022-04-06 15:01:33,608 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:01:33,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1951439081] [2022-04-06 15:01:33,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1951439081] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:01:33,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:01:33,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [123] imperfect sequences [] total 123 [2022-04-06 15:01:33,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507995200] [2022-04-06 15:01:33,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:01:33,609 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-04-06 15:01:33,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:01:33,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-04-06 15:01:33,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7423, Invalid=10133, Unknown=0, NotChecked=0, Total=17556 [2022-04-06 15:01:33,611 INFO L87 Difference]: Start difference. First operand 255 states and 258 transitions. Second operand has 123 states, 123 states have (on average 2.024390243902439) internal successors, (249), 122 states have internal predecessors, (249), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 15:01:37,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:01:37,930 INFO L93 Difference]: Finished difference Result 266 states and 272 transitions. [2022-04-06 15:01:37,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-04-06 15:01:37,930 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 2.024390243902439) internal successors, (249), 122 states have internal predecessors, (249), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 253 [2022-04-06 15:01:37,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:01:37,931 INFO L225 Difference]: With dead ends: 266 [2022-04-06 15:01:37,931 INFO L226 Difference]: Without dead ends: 257 [2022-04-06 15:01:37,934 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 749 GetRequests, 497 SyntacticMatches, 1 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8948 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=22183, Invalid=41573, Unknown=0, NotChecked=0, Total=63756 [2022-04-06 15:01:37,935 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 128 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 15:01:37,935 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 24 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 15:01:37,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-04-06 15:01:37,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 257. [2022-04-06 15:01:37,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 252 states have (on average 1.0158730158730158) internal successors, (256), 252 states have internal predecessors, (256), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 15:01:37,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 260 transitions. [2022-04-06 15:01:37,944 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 260 transitions. Word has length 253 [2022-04-06 15:01:37,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:01:37,944 INFO L478 AbstractCegarLoop]: Abstraction has 257 states and 260 transitions. [2022-04-06 15:01:37,944 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 2.024390243902439) internal successors, (249), 122 states have internal predecessors, (249), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 15:01:37,944 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 260 transitions. [2022-04-06 15:01:37,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2022-04-06 15:01:37,945 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:01:37,945 INFO L499 BasicCegarLoop]: trace histogram [122, 120, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:01:37,960 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2022-04-06 15:01:38,151 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,SelfDestructingSolverStorable242,121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:01:38,151 INFO L403 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:01:38,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:01:38,152 INFO L85 PathProgramCache]: Analyzing trace with hash 438983377, now seen corresponding path program 241 times [2022-04-06 15:01:38,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:01:38,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [367137972] [2022-04-06 15:01:38,174 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 15:01:38,234 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 15:01:38,234 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:01:38,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1734394799, now seen corresponding path program 1 times [2022-04-06 15:01:38,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:01:38,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065163368] [2022-04-06 15:01:38,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:01:38,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:01:38,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 15:01:38,237 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 15:01:38,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 15:01:38,239 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 15:01:38,239 INFO L85 PathProgramCache]: Analyzing trace with hash 438983377, now seen corresponding path program 242 times [2022-04-06 15:01:38,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:01:38,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676728305] [2022-04-06 15:01:38,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:01:38,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:01:38,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:01:41,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:01:41,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:01:41,421 INFO L134 CoverageAnalysis]: Checked inductivity of 14884 backedges. 363 proven. 14520 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:01:41,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:01:41,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676728305] [2022-04-06 15:01:41,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676728305] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:01:41,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823430914] [2022-04-06 15:01:41,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 15:01:41,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:01:41,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:01:41,422 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:01:41,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-04-06 15:01:41,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 15:01:41,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:01:41,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 122 conjunts are in the unsatisfiable core [2022-04-06 15:01:41,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:01:41,698 INFO L134 CoverageAnalysis]: Checked inductivity of 14884 backedges. 363 proven. 14520 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:01:41,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:01:51,359 INFO L134 CoverageAnalysis]: Checked inductivity of 14884 backedges. 363 proven. 14520 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:01:51,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823430914] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:01:51,359 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 15:01:51,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [124, 123, 123] total 246 [2022-04-06 15:01:51,360 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:01:51,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [367137972] [2022-04-06 15:01:51,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [367137972] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:01:51,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:01:51,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [124] imperfect sequences [] total 124 [2022-04-06 15:01:51,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005857834] [2022-04-06 15:01:51,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:01:51,360 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-04-06 15:01:51,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:01:51,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-04-06 15:01:51,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29892, Invalid=30378, Unknown=0, NotChecked=0, Total=60270 [2022-04-06 15:01:51,364 INFO L87 Difference]: Start difference. First operand 257 states and 260 transitions. Second operand has 124 states, 124 states have (on average 2.024193548387097) internal successors, (251), 123 states have internal predecessors, (251), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 15:01:55,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:01:55,434 INFO L93 Difference]: Finished difference Result 268 states and 274 transitions. [2022-04-06 15:01:55,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-04-06 15:01:55,434 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 2.024193548387097) internal successors, (251), 123 states have internal predecessors, (251), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 255 [2022-04-06 15:01:55,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:01:55,435 INFO L225 Difference]: With dead ends: 268 [2022-04-06 15:01:55,435 INFO L226 Difference]: Without dead ends: 259 [2022-04-06 15:01:55,439 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 755 GetRequests, 390 SyntacticMatches, 0 SemanticMatches, 365 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7979 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=59538, Invalid=74784, Unknown=0, NotChecked=0, Total=134322 [2022-04-06 15:01:55,439 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 129 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 15:01:55,439 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 19 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 15:01:55,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-04-06 15:01:55,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2022-04-06 15:01:55,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 254 states have (on average 1.015748031496063) internal successors, (258), 254 states have internal predecessors, (258), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 15:01:55,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 262 transitions. [2022-04-06 15:01:55,448 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 262 transitions. Word has length 255 [2022-04-06 15:01:55,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:01:55,448 INFO L478 AbstractCegarLoop]: Abstraction has 259 states and 262 transitions. [2022-04-06 15:01:55,448 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 2.024193548387097) internal successors, (251), 123 states have internal predecessors, (251), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 15:01:55,449 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 262 transitions. [2022-04-06 15:01:55,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2022-04-06 15:01:55,449 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:01:55,449 INFO L499 BasicCegarLoop]: trace histogram [123, 121, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:01:55,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2022-04-06 15:01:55,661 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243,SelfDestructingSolverStorable244 [2022-04-06 15:01:55,662 INFO L403 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:01:55,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:01:55,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1842672210, now seen corresponding path program 243 times [2022-04-06 15:01:55,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:01:55,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1131734173] [2022-04-06 15:01:55,685 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 15:01:55,718 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 15:01:55,719 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:01:55,719 INFO L85 PathProgramCache]: Analyzing trace with hash -511040337, now seen corresponding path program 1 times [2022-04-06 15:01:55,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:01:55,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317492249] [2022-04-06 15:01:55,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:01:55,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:01:55,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 15:01:55,721 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 15:01:55,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 15:01:55,727 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 15:01:55,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1842672210, now seen corresponding path program 244 times [2022-04-06 15:01:55,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:01:55,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348393281] [2022-04-06 15:01:55,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:01:55,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:01:55,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:01:59,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:01:59,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:01:59,040 INFO L134 CoverageAnalysis]: Checked inductivity of 15129 backedges. 366 proven. 14762 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:01:59,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:01:59,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348393281] [2022-04-06 15:01:59,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348393281] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:01:59,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623122046] [2022-04-06 15:01:59,041 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 15:01:59,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:01:59,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:01:59,042 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:01:59,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-04-06 15:01:59,110 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 15:01:59,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:01:59,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 123 conjunts are in the unsatisfiable core [2022-04-06 15:01:59,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:01:59,328 INFO L134 CoverageAnalysis]: Checked inductivity of 15129 backedges. 366 proven. 14762 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:01:59,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:02:09,251 INFO L134 CoverageAnalysis]: Checked inductivity of 15129 backedges. 366 proven. 14762 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:02:09,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623122046] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:02:09,251 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 15:02:09,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [125, 124, 124] total 248 [2022-04-06 15:02:09,252 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:02:09,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1131734173] [2022-04-06 15:02:09,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1131734173] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:02:09,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:02:09,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [125] imperfect sequences [] total 125 [2022-04-06 15:02:09,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089867809] [2022-04-06 15:02:09,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:02:09,252 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2022-04-06 15:02:09,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:02:09,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2022-04-06 15:02:09,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30383, Invalid=30873, Unknown=0, NotChecked=0, Total=61256 [2022-04-06 15:02:09,256 INFO L87 Difference]: Start difference. First operand 259 states and 262 transitions. Second operand has 125 states, 125 states have (on average 2.024) internal successors, (253), 124 states have internal predecessors, (253), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 15:02:13,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:02:13,056 INFO L93 Difference]: Finished difference Result 270 states and 276 transitions. [2022-04-06 15:02:13,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-04-06 15:02:13,056 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 2.024) internal successors, (253), 124 states have internal predecessors, (253), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 257 [2022-04-06 15:02:13,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:02:13,057 INFO L225 Difference]: With dead ends: 270 [2022-04-06 15:02:13,057 INFO L226 Difference]: Without dead ends: 261 [2022-04-06 15:02:13,062 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 761 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 368 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8106 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=60518, Invalid=76012, Unknown=0, NotChecked=0, Total=136530 [2022-04-06 15:02:13,062 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 130 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 15:02:13,063 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 34 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 15:02:13,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-04-06 15:02:13,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2022-04-06 15:02:13,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 256 states have (on average 1.015625) internal successors, (260), 256 states have internal predecessors, (260), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 15:02:13,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 264 transitions. [2022-04-06 15:02:13,072 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 264 transitions. Word has length 257 [2022-04-06 15:02:13,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:02:13,072 INFO L478 AbstractCegarLoop]: Abstraction has 261 states and 264 transitions. [2022-04-06 15:02:13,072 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 2.024) internal successors, (253), 124 states have internal predecessors, (253), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 15:02:13,072 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 264 transitions. [2022-04-06 15:02:13,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2022-04-06 15:02:13,073 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:02:13,073 INFO L499 BasicCegarLoop]: trace histogram [124, 122, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:02:13,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2022-04-06 15:02:13,274 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable245,SelfDestructingSolverStorable246,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:02:13,275 INFO L403 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:02:13,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:02:13,275 INFO L85 PathProgramCache]: Analyzing trace with hash 214596939, now seen corresponding path program 245 times [2022-04-06 15:02:13,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:02:13,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1477992428] [2022-04-06 15:02:13,291 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 15:02:13,323 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 15:02:13,340 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:02:13,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1538491823, now seen corresponding path program 1 times [2022-04-06 15:02:13,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:02:13,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792065609] [2022-04-06 15:02:13,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:02:13,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:02:13,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 15:02:13,343 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 15:02:13,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 15:02:13,345 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 15:02:13,345 INFO L85 PathProgramCache]: Analyzing trace with hash 214596939, now seen corresponding path program 246 times [2022-04-06 15:02:13,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:02:13,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183857789] [2022-04-06 15:02:13,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:02:13,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:02:13,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:02:16,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:02:16,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:02:16,785 INFO L134 CoverageAnalysis]: Checked inductivity of 15376 backedges. 369 proven. 15006 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:02:16,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:02:16,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183857789] [2022-04-06 15:02:16,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183857789] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:02:16,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996921242] [2022-04-06 15:02:16,785 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 15:02:16,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:02:16,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:02:16,786 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:02:16,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-04-06 15:02:16,875 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 15:02:16,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:02:16,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 15:02:16,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:02:17,217 INFO L134 CoverageAnalysis]: Checked inductivity of 15376 backedges. 0 proven. 370 refuted. 0 times theorem prover too weak. 15006 trivial. 0 not checked. [2022-04-06 15:02:17,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:02:17,532 INFO L134 CoverageAnalysis]: Checked inductivity of 15376 backedges. 0 proven. 370 refuted. 0 times theorem prover too weak. 15006 trivial. 0 not checked. [2022-04-06 15:02:17,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996921242] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:02:17,533 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 15:02:17,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [126, 8, 8] total 136 [2022-04-06 15:02:17,533 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:02:17,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1477992428] [2022-04-06 15:02:17,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1477992428] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:02:17,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:02:17,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [126] imperfect sequences [] total 126 [2022-04-06 15:02:17,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166661307] [2022-04-06 15:02:17,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:02:17,534 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-04-06 15:02:17,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:02:17,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-04-06 15:02:17,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7792, Invalid=10568, Unknown=0, NotChecked=0, Total=18360 [2022-04-06 15:02:17,536 INFO L87 Difference]: Start difference. First operand 261 states and 264 transitions. Second operand has 126 states, 126 states have (on average 2.0238095238095237) internal successors, (255), 125 states have internal predecessors, (255), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 15:02:21,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:02:21,423 INFO L93 Difference]: Finished difference Result 272 states and 278 transitions. [2022-04-06 15:02:21,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-04-06 15:02:21,423 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 2.0238095238095237) internal successors, (255), 125 states have internal predecessors, (255), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 259 [2022-04-06 15:02:21,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:02:21,423 INFO L225 Difference]: With dead ends: 272 [2022-04-06 15:02:21,423 INFO L226 Difference]: Without dead ends: 263 [2022-04-06 15:02:21,426 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 767 GetRequests, 509 SyntacticMatches, 1 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9356 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=23290, Invalid=43532, Unknown=0, NotChecked=0, Total=66822 [2022-04-06 15:02:21,426 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 131 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 15:02:21,426 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 24 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 15:02:21,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-04-06 15:02:21,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2022-04-06 15:02:21,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 258 states have (on average 1.0155038759689923) internal successors, (262), 258 states have internal predecessors, (262), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 15:02:21,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 266 transitions. [2022-04-06 15:02:21,435 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 266 transitions. Word has length 259 [2022-04-06 15:02:21,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:02:21,435 INFO L478 AbstractCegarLoop]: Abstraction has 263 states and 266 transitions. [2022-04-06 15:02:21,435 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 2.0238095238095237) internal successors, (255), 125 states have internal predecessors, (255), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 15:02:21,435 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 266 transitions. [2022-04-06 15:02:21,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2022-04-06 15:02:21,436 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:02:21,436 INFO L499 BasicCegarLoop]: trace histogram [125, 123, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:02:21,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2022-04-06 15:02:21,651 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,SelfDestructingSolverStorable248,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:02:21,652 INFO L403 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:02:21,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:02:21,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1565292968, now seen corresponding path program 247 times [2022-04-06 15:02:21,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:02:21,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1662423989] [2022-04-06 15:02:21,663 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 15:02:21,685 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 15:02:21,685 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:02:21,685 INFO L85 PathProgramCache]: Analyzing trace with hash -706943313, now seen corresponding path program 1 times [2022-04-06 15:02:21,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:02:21,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516996753] [2022-04-06 15:02:21,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:02:21,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:02:21,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 15:02:21,687 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 15:02:21,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 15:02:21,689 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 15:02:21,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1565292968, now seen corresponding path program 248 times [2022-04-06 15:02:21,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:02:21,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887650494] [2022-04-06 15:02:21,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:02:21,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:02:21,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:02:25,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:02:25,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:02:25,165 INFO L134 CoverageAnalysis]: Checked inductivity of 15625 backedges. 372 proven. 15252 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:02:25,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:02:25,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887650494] [2022-04-06 15:02:25,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887650494] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:02:25,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148178662] [2022-04-06 15:02:25,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 15:02:25,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:02:25,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:02:25,166 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:02:25,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-04-06 15:02:25,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 15:02:25,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:02:25,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 125 conjunts are in the unsatisfiable core [2022-04-06 15:02:25,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:02:25,455 INFO L134 CoverageAnalysis]: Checked inductivity of 15625 backedges. 372 proven. 15252 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:02:25,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:02:34,793 INFO L134 CoverageAnalysis]: Checked inductivity of 15625 backedges. 372 proven. 15252 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:02:34,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148178662] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:02:34,794 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 15:02:34,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [127, 126, 126] total 252 [2022-04-06 15:02:34,794 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:02:34,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1662423989] [2022-04-06 15:02:34,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1662423989] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:02:34,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:02:34,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [127] imperfect sequences [] total 127 [2022-04-06 15:02:34,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060286427] [2022-04-06 15:02:34,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:02:34,794 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2022-04-06 15:02:34,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:02:34,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2022-04-06 15:02:34,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31377, Invalid=31875, Unknown=0, NotChecked=0, Total=63252 [2022-04-06 15:02:34,799 INFO L87 Difference]: Start difference. First operand 263 states and 266 transitions. Second operand has 127 states, 127 states have (on average 2.0236220472440944) internal successors, (257), 126 states have internal predecessors, (257), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 15:02:39,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:02:39,232 INFO L93 Difference]: Finished difference Result 274 states and 280 transitions. [2022-04-06 15:02:39,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-04-06 15:02:39,232 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 2.0236220472440944) internal successors, (257), 126 states have internal predecessors, (257), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 261 [2022-04-06 15:02:39,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:02:39,233 INFO L225 Difference]: With dead ends: 274 [2022-04-06 15:02:39,233 INFO L226 Difference]: Without dead ends: 265 [2022-04-06 15:02:39,237 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 773 GetRequests, 399 SyntacticMatches, 0 SemanticMatches, 374 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8363 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=62502, Invalid=78498, Unknown=0, NotChecked=0, Total=141000 [2022-04-06 15:02:39,237 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 132 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 15:02:39,237 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 59 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 15:02:39,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-04-06 15:02:39,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2022-04-06 15:02:39,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 260 states have (on average 1.0153846153846153) internal successors, (264), 260 states have internal predecessors, (264), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 15:02:39,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 268 transitions. [2022-04-06 15:02:39,247 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 268 transitions. Word has length 261 [2022-04-06 15:02:39,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:02:39,247 INFO L478 AbstractCegarLoop]: Abstraction has 265 states and 268 transitions. [2022-04-06 15:02:39,247 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 2.0236220472440944) internal successors, (257), 126 states have internal predecessors, (257), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 15:02:39,247 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 268 transitions. [2022-04-06 15:02:39,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-04-06 15:02:39,248 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:02:39,248 INFO L499 BasicCegarLoop]: trace histogram [126, 124, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:02:39,263 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2022-04-06 15:02:39,449 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2022-04-06 15:02:39,449 INFO L403 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:02:39,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:02:39,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1790913851, now seen corresponding path program 249 times [2022-04-06 15:02:39,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:02:39,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [767374175] [2022-04-06 15:02:39,467 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 15:02:39,505 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 15:02:39,505 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:02:39,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1342588847, now seen corresponding path program 1 times [2022-04-06 15:02:39,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:02:39,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298797001] [2022-04-06 15:02:39,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:02:39,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:02:39,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 15:02:39,508 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 15:02:39,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 15:02:39,509 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 15:02:39,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1790913851, now seen corresponding path program 250 times [2022-04-06 15:02:39,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:02:39,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998665445] [2022-04-06 15:02:39,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:02:39,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:02:39,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:02:42,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:02:42,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:02:42,293 INFO L134 CoverageAnalysis]: Checked inductivity of 15876 backedges. 375 proven. 15500 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:02:42,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:02:42,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998665445] [2022-04-06 15:02:42,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998665445] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:02:42,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630935591] [2022-04-06 15:02:42,293 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 15:02:42,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:02:42,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:02:42,294 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:02:42,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-04-06 15:02:42,362 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 15:02:42,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:02:42,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 126 conjunts are in the unsatisfiable core [2022-04-06 15:02:42,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:02:42,603 INFO L134 CoverageAnalysis]: Checked inductivity of 15876 backedges. 375 proven. 15500 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:02:42,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:02:51,484 INFO L134 CoverageAnalysis]: Checked inductivity of 15876 backedges. 375 proven. 15500 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:02:51,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630935591] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:02:51,484 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 15:02:51,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [128, 127, 127] total 254 [2022-04-06 15:02:51,485 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:02:51,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [767374175] [2022-04-06 15:02:51,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [767374175] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:02:51,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:02:51,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [128] imperfect sequences [] total 128 [2022-04-06 15:02:51,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016810281] [2022-04-06 15:02:51,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:02:51,488 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-04-06 15:02:51,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:02:51,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-04-06 15:02:51,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31880, Invalid=32382, Unknown=0, NotChecked=0, Total=64262 [2022-04-06 15:02:51,492 INFO L87 Difference]: Start difference. First operand 265 states and 268 transitions. Second operand has 128 states, 128 states have (on average 2.0234375) internal successors, (259), 127 states have internal predecessors, (259), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 15:02:54,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:02:54,932 INFO L93 Difference]: Finished difference Result 276 states and 282 transitions. [2022-04-06 15:02:54,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-04-06 15:02:54,933 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 2.0234375) internal successors, (259), 127 states have internal predecessors, (259), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 263 [2022-04-06 15:02:54,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:02:54,933 INFO L225 Difference]: With dead ends: 276 [2022-04-06 15:02:54,933 INFO L226 Difference]: Without dead ends: 267 [2022-04-06 15:02:54,938 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 779 GetRequests, 402 SyntacticMatches, 0 SemanticMatches, 377 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8493 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=63506, Invalid=79756, Unknown=0, NotChecked=0, Total=143262 [2022-04-06 15:02:54,938 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 133 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 15:02:54,938 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 39 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 15:02:54,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-04-06 15:02:54,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 267. [2022-04-06 15:02:54,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 262 states have (on average 1.015267175572519) internal successors, (266), 262 states have internal predecessors, (266), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 15:02:54,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 270 transitions. [2022-04-06 15:02:54,948 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 270 transitions. Word has length 263 [2022-04-06 15:02:54,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:02:54,948 INFO L478 AbstractCegarLoop]: Abstraction has 267 states and 270 transitions. [2022-04-06 15:02:54,948 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 2.0234375) internal successors, (259), 127 states have internal predecessors, (259), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 15:02:54,948 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 270 transitions. [2022-04-06 15:02:54,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2022-04-06 15:02:54,949 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:02:54,949 INFO L499 BasicCegarLoop]: trace histogram [127, 125, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:02:54,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2022-04-06 15:02:55,165 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,SelfDestructingSolverStorable252,126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:02:55,165 INFO L403 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:02:55,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:02:55,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1585227614, now seen corresponding path program 251 times [2022-04-06 15:02:55,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:02:55,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1047471449] [2022-04-06 15:02:55,176 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 15:02:55,196 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 15:02:55,196 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:02:55,197 INFO L85 PathProgramCache]: Analyzing trace with hash -902846289, now seen corresponding path program 1 times [2022-04-06 15:02:55,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:02:55,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172422028] [2022-04-06 15:02:55,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:02:55,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:02:55,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 15:02:55,199 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 15:02:55,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 15:02:55,200 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 15:02:55,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1585227614, now seen corresponding path program 252 times [2022-04-06 15:02:55,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:02:55,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933712109] [2022-04-06 15:02:55,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:02:55,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:02:55,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:02:58,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:02:58,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:02:58,162 INFO L134 CoverageAnalysis]: Checked inductivity of 16129 backedges. 378 proven. 15750 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:02:58,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:02:58,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933712109] [2022-04-06 15:02:58,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933712109] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:02:58,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871972411] [2022-04-06 15:02:58,163 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 15:02:58,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:02:58,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:02:58,164 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:02:58,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-04-06 15:02:58,196 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 15:02:58,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:02:58,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 15:02:58,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:02:58,536 INFO L134 CoverageAnalysis]: Checked inductivity of 16129 backedges. 0 proven. 379 refuted. 0 times theorem prover too weak. 15750 trivial. 0 not checked. [2022-04-06 15:02:58,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:02:58,979 INFO L134 CoverageAnalysis]: Checked inductivity of 16129 backedges. 0 proven. 379 refuted. 0 times theorem prover too weak. 15750 trivial. 0 not checked. [2022-04-06 15:02:58,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871972411] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:02:58,979 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 15:02:58,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [129, 8, 8] total 139 [2022-04-06 15:02:58,980 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:02:58,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1047471449] [2022-04-06 15:02:58,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1047471449] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:02:58,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:02:58,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [129] imperfect sequences [] total 129 [2022-04-06 15:02:58,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424186887] [2022-04-06 15:02:58,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:02:58,980 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-04-06 15:02:58,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:02:58,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-04-06 15:02:58,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8170, Invalid=11012, Unknown=0, NotChecked=0, Total=19182 [2022-04-06 15:02:58,983 INFO L87 Difference]: Start difference. First operand 267 states and 270 transitions. Second operand has 129 states, 129 states have (on average 2.0232558139534884) internal successors, (261), 128 states have internal predecessors, (261), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 15:03:03,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:03:03,267 INFO L93 Difference]: Finished difference Result 278 states and 284 transitions. [2022-04-06 15:03:03,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-04-06 15:03:03,268 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 2.0232558139534884) internal successors, (261), 128 states have internal predecessors, (261), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 265 [2022-04-06 15:03:03,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:03:03,268 INFO L225 Difference]: With dead ends: 278 [2022-04-06 15:03:03,268 INFO L226 Difference]: Without dead ends: 269 [2022-04-06 15:03:03,271 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 785 GetRequests, 521 SyntacticMatches, 1 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9773 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=24424, Invalid=45536, Unknown=0, NotChecked=0, Total=69960 [2022-04-06 15:03:03,271 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 134 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 15:03:03,271 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 29 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 15:03:03,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-04-06 15:03:03,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 269. [2022-04-06 15:03:03,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 264 states have (on average 1.0151515151515151) internal successors, (268), 264 states have internal predecessors, (268), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 15:03:03,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 272 transitions. [2022-04-06 15:03:03,281 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 272 transitions. Word has length 265 [2022-04-06 15:03:03,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:03:03,281 INFO L478 AbstractCegarLoop]: Abstraction has 269 states and 272 transitions. [2022-04-06 15:03:03,281 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 2.0232558139534884) internal successors, (261), 128 states have internal predecessors, (261), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 15:03:03,281 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 272 transitions. [2022-04-06 15:03:03,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2022-04-06 15:03:03,281 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:03:03,282 INFO L499 BasicCegarLoop]: trace histogram [128, 126, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:03:03,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2022-04-06 15:03:03,497 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2022-04-06 15:03:03,497 INFO L403 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:03:03,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:03:03,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1489249473, now seen corresponding path program 253 times [2022-04-06 15:03:03,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:03:03,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1192443432] [2022-04-06 15:03:03,513 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 15:03:03,554 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 15:03:03,555 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:03:03,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1146685871, now seen corresponding path program 1 times [2022-04-06 15:03:03,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:03:03,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849412981] [2022-04-06 15:03:03,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:03:03,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:03:03,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 15:03:03,557 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 15:03:03,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 15:03:03,559 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 15:03:03,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1489249473, now seen corresponding path program 254 times [2022-04-06 15:03:03,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:03:03,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804269461] [2022-04-06 15:03:03,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:03:03,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:03:03,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:03:06,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:03:06,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:03:06,338 INFO L134 CoverageAnalysis]: Checked inductivity of 16384 backedges. 381 proven. 16002 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:03:06,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:03:06,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804269461] [2022-04-06 15:03:06,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804269461] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:03:06,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443778901] [2022-04-06 15:03:06,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 15:03:06,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:03:06,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:03:06,343 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:03:06,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-04-06 15:03:06,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 15:03:06,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:03:06,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 128 conjunts are in the unsatisfiable core [2022-04-06 15:03:06,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:03:06,839 INFO L134 CoverageAnalysis]: Checked inductivity of 16384 backedges. 381 proven. 16002 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:03:06,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:03:15,206 INFO L134 CoverageAnalysis]: Checked inductivity of 16384 backedges. 381 proven. 16002 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:03:15,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443778901] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:03:15,206 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 15:03:15,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [130, 129, 129] total 258 [2022-04-06 15:03:15,207 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:03:15,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1192443432] [2022-04-06 15:03:15,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1192443432] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:03:15,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:03:15,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [130] imperfect sequences [] total 130 [2022-04-06 15:03:15,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889527797] [2022-04-06 15:03:15,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:03:15,207 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-04-06 15:03:15,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:03:15,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-04-06 15:03:15,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32898, Invalid=33408, Unknown=0, NotChecked=0, Total=66306 [2022-04-06 15:03:15,211 INFO L87 Difference]: Start difference. First operand 269 states and 272 transitions. Second operand has 130 states, 130 states have (on average 2.023076923076923) internal successors, (263), 129 states have internal predecessors, (263), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 15:03:19,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:03:19,204 INFO L93 Difference]: Finished difference Result 280 states and 286 transitions. [2022-04-06 15:03:19,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-04-06 15:03:19,204 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 2.023076923076923) internal successors, (263), 129 states have internal predecessors, (263), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 267 [2022-04-06 15:03:19,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:03:19,205 INFO L225 Difference]: With dead ends: 280 [2022-04-06 15:03:19,205 INFO L226 Difference]: Without dead ends: 271 [2022-04-06 15:03:19,210 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 791 GetRequests, 408 SyntacticMatches, 0 SemanticMatches, 383 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8756 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=65538, Invalid=82302, Unknown=0, NotChecked=0, Total=147840 [2022-04-06 15:03:19,210 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 135 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 15:03:19,210 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 29 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 15:03:19,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-04-06 15:03:19,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 271. [2022-04-06 15:03:19,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 266 states have (on average 1.0150375939849625) internal successors, (270), 266 states have internal predecessors, (270), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 15:03:19,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 274 transitions. [2022-04-06 15:03:19,219 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 274 transitions. Word has length 267 [2022-04-06 15:03:19,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:03:19,220 INFO L478 AbstractCegarLoop]: Abstraction has 271 states and 274 transitions. [2022-04-06 15:03:19,220 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 2.023076923076923) internal successors, (263), 129 states have internal predecessors, (263), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 15:03:19,220 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 274 transitions. [2022-04-06 15:03:19,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2022-04-06 15:03:19,220 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:03:19,220 INFO L499 BasicCegarLoop]: trace histogram [129, 127, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:03:19,236 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2022-04-06 15:03:19,436 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable255,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2022-04-06 15:03:19,437 INFO L403 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:03:19,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:03:19,437 INFO L85 PathProgramCache]: Analyzing trace with hash 551430812, now seen corresponding path program 255 times [2022-04-06 15:03:19,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:03:19,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1959526751] [2022-04-06 15:03:19,458 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 15:03:19,495 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 15:03:19,495 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:03:19,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1098749265, now seen corresponding path program 1 times [2022-04-06 15:03:19,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:03:19,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963271185] [2022-04-06 15:03:19,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:03:19,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:03:19,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 15:03:19,497 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 15:03:19,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 15:03:19,499 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 15:03:19,499 INFO L85 PathProgramCache]: Analyzing trace with hash 551430812, now seen corresponding path program 256 times [2022-04-06 15:03:19,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:03:19,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922984692] [2022-04-06 15:03:19,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:03:19,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:03:19,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:03:23,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:03:23,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:03:23,437 INFO L134 CoverageAnalysis]: Checked inductivity of 16641 backedges. 384 proven. 16256 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:03:23,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:03:23,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922984692] [2022-04-06 15:03:23,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922984692] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:03:23,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105902584] [2022-04-06 15:03:23,438 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 15:03:23,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:03:23,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:03:23,440 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:03:23,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-04-06 15:03:23,522 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 15:03:23,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:03:23,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 129 conjunts are in the unsatisfiable core [2022-04-06 15:03:23,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:03:23,859 INFO L134 CoverageAnalysis]: Checked inductivity of 16641 backedges. 384 proven. 16256 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:03:23,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:03:33,354 INFO L134 CoverageAnalysis]: Checked inductivity of 16641 backedges. 384 proven. 16256 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:03:33,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105902584] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:03:33,355 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 15:03:33,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [131, 130, 130] total 260 [2022-04-06 15:03:33,355 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:03:33,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1959526751] [2022-04-06 15:03:33,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1959526751] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:03:33,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:03:33,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [131] imperfect sequences [] total 131 [2022-04-06 15:03:33,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682685787] [2022-04-06 15:03:33,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:03:33,356 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-04-06 15:03:33,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:03:33,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-04-06 15:03:33,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33413, Invalid=33927, Unknown=0, NotChecked=0, Total=67340 [2022-04-06 15:03:33,360 INFO L87 Difference]: Start difference. First operand 271 states and 274 transitions. Second operand has 131 states, 131 states have (on average 2.0229007633587788) internal successors, (265), 130 states have internal predecessors, (265), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 15:03:37,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:03:37,054 INFO L93 Difference]: Finished difference Result 282 states and 288 transitions. [2022-04-06 15:03:37,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-04-06 15:03:37,054 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 2.0229007633587788) internal successors, (265), 130 states have internal predecessors, (265), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 269 [2022-04-06 15:03:37,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:03:37,055 INFO L225 Difference]: With dead ends: 282 [2022-04-06 15:03:37,055 INFO L226 Difference]: Without dead ends: 273 [2022-04-06 15:03:37,061 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 797 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 386 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8889 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=66566, Invalid=83590, Unknown=0, NotChecked=0, Total=150156 [2022-04-06 15:03:37,062 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 136 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 15:03:37,062 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 44 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 15:03:37,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-04-06 15:03:37,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 273. [2022-04-06 15:03:37,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 268 states have (on average 1.0149253731343284) internal successors, (272), 268 states have internal predecessors, (272), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 15:03:37,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 276 transitions. [2022-04-06 15:03:37,072 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 276 transitions. Word has length 269 [2022-04-06 15:03:37,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:03:37,072 INFO L478 AbstractCegarLoop]: Abstraction has 273 states and 276 transitions. [2022-04-06 15:03:37,072 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 2.0229007633587788) internal successors, (265), 130 states have internal predecessors, (265), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 15:03:37,072 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 276 transitions. [2022-04-06 15:03:37,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2022-04-06 15:03:37,073 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:03:37,073 INFO L499 BasicCegarLoop]: trace histogram [130, 128, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:03:37,089 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2022-04-06 15:03:37,287 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258,SelfDestructingSolverStorable257 [2022-04-06 15:03:37,288 INFO L403 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:03:37,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:03:37,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1154869575, now seen corresponding path program 257 times [2022-04-06 15:03:37,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:03:37,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [215412831] [2022-04-06 15:03:37,299 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 15:03:37,320 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 15:03:37,320 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:03:37,320 INFO L85 PathProgramCache]: Analyzing trace with hash 950782895, now seen corresponding path program 1 times [2022-04-06 15:03:37,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:03:37,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941813354] [2022-04-06 15:03:37,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:03:37,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:03:37,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 15:03:37,326 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 15:03:37,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 15:03:37,328 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 15:03:37,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1154869575, now seen corresponding path program 258 times [2022-04-06 15:03:37,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:03:37,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072081116] [2022-04-06 15:03:37,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:03:37,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:03:37,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:03:40,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:03:40,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:03:40,442 INFO L134 CoverageAnalysis]: Checked inductivity of 16900 backedges. 387 proven. 16512 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:03:40,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:03:40,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072081116] [2022-04-06 15:03:40,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072081116] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:03:40,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539973310] [2022-04-06 15:03:40,442 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 15:03:40,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:03:40,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:03:40,443 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:03:40,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-04-06 15:03:40,483 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 15:03:40,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:03:40,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 15:03:40,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:03:40,817 INFO L134 CoverageAnalysis]: Checked inductivity of 16900 backedges. 0 proven. 388 refuted. 0 times theorem prover too weak. 16512 trivial. 0 not checked. [2022-04-06 15:03:40,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:03:41,165 INFO L134 CoverageAnalysis]: Checked inductivity of 16900 backedges. 0 proven. 388 refuted. 0 times theorem prover too weak. 16512 trivial. 0 not checked. [2022-04-06 15:03:41,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539973310] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:03:41,165 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 15:03:41,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [132, 8, 8] total 142 [2022-04-06 15:03:41,165 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:03:41,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [215412831] [2022-04-06 15:03:41,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [215412831] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:03:41,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:03:41,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [132] imperfect sequences [] total 132 [2022-04-06 15:03:41,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441105118] [2022-04-06 15:03:41,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:03:41,166 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2022-04-06 15:03:41,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:03:41,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2022-04-06 15:03:41,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8557, Invalid=11465, Unknown=0, NotChecked=0, Total=20022 [2022-04-06 15:03:41,168 INFO L87 Difference]: Start difference. First operand 273 states and 276 transitions. Second operand has 132 states, 132 states have (on average 2.022727272727273) internal successors, (267), 131 states have internal predecessors, (267), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 15:03:44,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:03:44,822 INFO L93 Difference]: Finished difference Result 284 states and 290 transitions. [2022-04-06 15:03:44,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-04-06 15:03:44,823 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 2.022727272727273) internal successors, (267), 131 states have internal predecessors, (267), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 271 [2022-04-06 15:03:44,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:03:44,823 INFO L225 Difference]: With dead ends: 284 [2022-04-06 15:03:44,823 INFO L226 Difference]: Without dead ends: 275 [2022-04-06 15:03:44,846 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 803 GetRequests, 533 SyntacticMatches, 1 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10199 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=25585, Invalid=47585, Unknown=0, NotChecked=0, Total=73170 [2022-04-06 15:03:44,847 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 137 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 15:03:44,847 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 44 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 15:03:44,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-04-06 15:03:44,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2022-04-06 15:03:44,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 270 states have (on average 1.0148148148148148) internal successors, (274), 270 states have internal predecessors, (274), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 15:03:44,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 278 transitions. [2022-04-06 15:03:44,857 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 278 transitions. Word has length 271 [2022-04-06 15:03:44,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:03:44,857 INFO L478 AbstractCegarLoop]: Abstraction has 275 states and 278 transitions. [2022-04-06 15:03:44,857 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 2.022727272727273) internal successors, (267), 131 states have internal predecessors, (267), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 15:03:44,857 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 278 transitions. [2022-04-06 15:03:44,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2022-04-06 15:03:44,858 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:03:44,858 INFO L499 BasicCegarLoop]: trace histogram [131, 129, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:03:44,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2022-04-06 15:03:45,068 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable260,SelfDestructingSolverStorable259 [2022-04-06 15:03:45,068 INFO L403 AbstractCegarLoop]: === Iteration 133 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:03:45,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:03:45,068 INFO L85 PathProgramCache]: Analyzing trace with hash -232034410, now seen corresponding path program 259 times [2022-04-06 15:03:45,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:03:45,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1843604512] [2022-04-06 15:03:45,082 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 15:03:45,116 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 15:03:45,117 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:03:45,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1294652241, now seen corresponding path program 1 times [2022-04-06 15:03:45,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:03:45,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495720824] [2022-04-06 15:03:45,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:03:45,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:03:45,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 15:03:45,119 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 15:03:45,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 15:03:45,121 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 15:03:45,121 INFO L85 PathProgramCache]: Analyzing trace with hash -232034410, now seen corresponding path program 260 times [2022-04-06 15:03:45,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:03:45,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562562939] [2022-04-06 15:03:45,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:03:45,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:03:45,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:03:48,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:03:48,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:03:48,026 INFO L134 CoverageAnalysis]: Checked inductivity of 17161 backedges. 390 proven. 16770 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:03:48,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:03:48,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562562939] [2022-04-06 15:03:48,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562562939] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:03:48,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052023823] [2022-04-06 15:03:48,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 15:03:48,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:03:48,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:03:48,028 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:03:48,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-04-06 15:03:48,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 15:03:48,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:03:48,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 131 conjunts are in the unsatisfiable core [2022-04-06 15:03:48,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:03:48,312 INFO L134 CoverageAnalysis]: Checked inductivity of 17161 backedges. 390 proven. 16770 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:03:48,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:03:57,522 INFO L134 CoverageAnalysis]: Checked inductivity of 17161 backedges. 390 proven. 16770 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:03:57,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052023823] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:03:57,523 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 15:03:57,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [133, 132, 132] total 264 [2022-04-06 15:03:57,523 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:03:57,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1843604512] [2022-04-06 15:03:57,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1843604512] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:03:57,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:03:57,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [133] imperfect sequences [] total 133 [2022-04-06 15:03:57,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992657721] [2022-04-06 15:03:57,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:03:57,524 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2022-04-06 15:03:57,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:03:57,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2022-04-06 15:03:57,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34455, Invalid=34977, Unknown=0, NotChecked=0, Total=69432 [2022-04-06 15:03:57,529 INFO L87 Difference]: Start difference. First operand 275 states and 278 transitions. Second operand has 133 states, 133 states have (on average 2.0225563909774436) internal successors, (269), 132 states have internal predecessors, (269), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 15:04:01,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:04:01,400 INFO L93 Difference]: Finished difference Result 286 states and 292 transitions. [2022-04-06 15:04:01,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-04-06 15:04:01,400 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 2.0225563909774436) internal successors, (269), 132 states have internal predecessors, (269), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 273 [2022-04-06 15:04:01,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:04:01,401 INFO L225 Difference]: With dead ends: 286 [2022-04-06 15:04:01,401 INFO L226 Difference]: Without dead ends: 277 [2022-04-06 15:04:01,406 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 809 GetRequests, 417 SyntacticMatches, 0 SemanticMatches, 392 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9158 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=68646, Invalid=86196, Unknown=0, NotChecked=0, Total=154842 [2022-04-06 15:04:01,407 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 138 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 15:04:01,407 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 54 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 15:04:01,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-04-06 15:04:01,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 277. [2022-04-06 15:04:01,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 272 states have (on average 1.0147058823529411) internal successors, (276), 272 states have internal predecessors, (276), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 15:04:01,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 280 transitions. [2022-04-06 15:04:01,419 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 280 transitions. Word has length 273 [2022-04-06 15:04:01,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:04:01,420 INFO L478 AbstractCegarLoop]: Abstraction has 277 states and 280 transitions. [2022-04-06 15:04:01,420 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 133 states have (on average 2.0225563909774436) internal successors, (269), 132 states have internal predecessors, (269), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 15:04:01,420 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 280 transitions. [2022-04-06 15:04:01,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2022-04-06 15:04:01,420 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:04:01,420 INFO L499 BasicCegarLoop]: trace histogram [132, 130, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:04:01,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2022-04-06 15:04:01,637 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,SelfDestructingSolverStorable262,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:04:01,637 INFO L403 AbstractCegarLoop]: === Iteration 134 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:04:01,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:04:01,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1849296179, now seen corresponding path program 261 times [2022-04-06 15:04:01,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:04:01,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [300368494] [2022-04-06 15:04:01,675 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 15:04:01,702 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 15:04:01,702 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:04:01,702 INFO L85 PathProgramCache]: Analyzing trace with hash 754879919, now seen corresponding path program 1 times [2022-04-06 15:04:01,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:04:01,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332738046] [2022-04-06 15:04:01,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:04:01,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:04:01,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 15:04:01,704 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 15:04:01,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 15:04:01,707 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 15:04:01,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1849296179, now seen corresponding path program 262 times [2022-04-06 15:04:01,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:04:01,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008660995] [2022-04-06 15:04:01,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:04:01,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:04:01,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:04:05,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:04:05,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:04:05,041 INFO L134 CoverageAnalysis]: Checked inductivity of 17424 backedges. 393 proven. 17030 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:04:05,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:04:05,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008660995] [2022-04-06 15:04:05,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008660995] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:04:05,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149654190] [2022-04-06 15:04:05,041 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 15:04:05,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:04:05,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:04:05,042 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:04:05,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-04-06 15:04:05,121 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 15:04:05,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:04:05,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 132 conjunts are in the unsatisfiable core [2022-04-06 15:04:05,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:04:05,334 INFO L134 CoverageAnalysis]: Checked inductivity of 17424 backedges. 393 proven. 17030 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:04:05,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:04:14,125 INFO L134 CoverageAnalysis]: Checked inductivity of 17424 backedges. 393 proven. 17030 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:04:14,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149654190] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:04:14,125 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 15:04:14,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [134, 133, 133] total 266 [2022-04-06 15:04:14,125 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:04:14,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [300368494] [2022-04-06 15:04:14,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [300368494] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:04:14,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:04:14,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [134] imperfect sequences [] total 134 [2022-04-06 15:04:14,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893778437] [2022-04-06 15:04:14,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:04:14,126 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-04-06 15:04:14,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:04:14,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-04-06 15:04:14,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34982, Invalid=35508, Unknown=0, NotChecked=0, Total=70490 [2022-04-06 15:04:14,131 INFO L87 Difference]: Start difference. First operand 277 states and 280 transitions. Second operand has 134 states, 134 states have (on average 2.0223880597014925) internal successors, (271), 133 states have internal predecessors, (271), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 15:04:17,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:04:17,839 INFO L93 Difference]: Finished difference Result 288 states and 294 transitions. [2022-04-06 15:04:17,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-04-06 15:04:17,839 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 2.0223880597014925) internal successors, (271), 133 states have internal predecessors, (271), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 275 [2022-04-06 15:04:17,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:04:17,840 INFO L225 Difference]: With dead ends: 288 [2022-04-06 15:04:17,840 INFO L226 Difference]: Without dead ends: 279 [2022-04-06 15:04:17,846 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 815 GetRequests, 420 SyntacticMatches, 0 SemanticMatches, 395 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9294 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=69698, Invalid=87514, Unknown=0, NotChecked=0, Total=157212 [2022-04-06 15:04:17,846 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 139 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 15:04:17,846 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 49 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 15:04:17,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-04-06 15:04:17,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 279. [2022-04-06 15:04:17,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 274 states have (on average 1.0145985401459854) internal successors, (278), 274 states have internal predecessors, (278), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 15:04:17,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 282 transitions. [2022-04-06 15:04:17,856 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 282 transitions. Word has length 275 [2022-04-06 15:04:17,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:04:17,856 INFO L478 AbstractCegarLoop]: Abstraction has 279 states and 282 transitions. [2022-04-06 15:04:17,856 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 2.0223880597014925) internal successors, (271), 133 states have internal predecessors, (271), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 15:04:17,856 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 282 transitions. [2022-04-06 15:04:17,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2022-04-06 15:04:17,857 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:04:17,857 INFO L499 BasicCegarLoop]: trace histogram [133, 131, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:04:17,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2022-04-06 15:04:18,063 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,SelfDestructingSolverStorable264,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:04:18,063 INFO L403 AbstractCegarLoop]: === Iteration 135 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:04:18,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:04:18,064 INFO L85 PathProgramCache]: Analyzing trace with hash 553232272, now seen corresponding path program 263 times [2022-04-06 15:04:18,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:04:18,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [26473002] [2022-04-06 15:04:18,080 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 15:04:18,111 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 15:04:18,112 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:04:18,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1490555217, now seen corresponding path program 1 times [2022-04-06 15:04:18,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:04:18,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496535572] [2022-04-06 15:04:18,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:04:18,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:04:18,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 15:04:18,114 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 15:04:18,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 15:04:18,115 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 15:04:18,116 INFO L85 PathProgramCache]: Analyzing trace with hash 553232272, now seen corresponding path program 264 times [2022-04-06 15:04:18,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:04:18,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537285555] [2022-04-06 15:04:18,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:04:18,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:04:18,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:04:21,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:04:21,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:04:21,245 INFO L134 CoverageAnalysis]: Checked inductivity of 17689 backedges. 396 proven. 17292 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:04:21,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:04:21,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537285555] [2022-04-06 15:04:21,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537285555] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:04:21,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981813839] [2022-04-06 15:04:21,245 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 15:04:21,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:04:21,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:04:21,247 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:04:21,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-04-06 15:04:21,280 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 15:04:21,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:04:21,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 15:04:21,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:04:21,718 INFO L134 CoverageAnalysis]: Checked inductivity of 17689 backedges. 0 proven. 397 refuted. 0 times theorem prover too weak. 17292 trivial. 0 not checked. [2022-04-06 15:04:21,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:04:22,071 INFO L134 CoverageAnalysis]: Checked inductivity of 17689 backedges. 0 proven. 397 refuted. 0 times theorem prover too weak. 17292 trivial. 0 not checked. [2022-04-06 15:04:22,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981813839] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:04:22,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 15:04:22,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [135, 8, 8] total 145 [2022-04-06 15:04:22,072 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:04:22,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [26473002] [2022-04-06 15:04:22,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [26473002] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:04:22,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:04:22,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [135] imperfect sequences [] total 135 [2022-04-06 15:04:22,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247227385] [2022-04-06 15:04:22,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:04:22,072 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2022-04-06 15:04:22,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:04:22,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2022-04-06 15:04:22,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8953, Invalid=11927, Unknown=0, NotChecked=0, Total=20880 [2022-04-06 15:04:22,074 INFO L87 Difference]: Start difference. First operand 279 states and 282 transitions. Second operand has 135 states, 135 states have (on average 2.022222222222222) internal successors, (273), 134 states have internal predecessors, (273), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 15:04:26,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:04:26,837 INFO L93 Difference]: Finished difference Result 290 states and 296 transitions. [2022-04-06 15:04:26,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-04-06 15:04:26,838 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 2.022222222222222) internal successors, (273), 134 states have internal predecessors, (273), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 277 [2022-04-06 15:04:26,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:04:26,838 INFO L225 Difference]: With dead ends: 290 [2022-04-06 15:04:26,839 INFO L226 Difference]: Without dead ends: 281 [2022-04-06 15:04:26,841 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 821 GetRequests, 545 SyntacticMatches, 1 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10634 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=26773, Invalid=49679, Unknown=0, NotChecked=0, Total=76452 [2022-04-06 15:04:26,842 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 140 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 15:04:26,842 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 49 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 15:04:26,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-04-06 15:04:26,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 281. [2022-04-06 15:04:26,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 276 states have (on average 1.0144927536231885) internal successors, (280), 276 states have internal predecessors, (280), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 15:04:26,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 284 transitions. [2022-04-06 15:04:26,852 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 284 transitions. Word has length 277 [2022-04-06 15:04:26,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:04:26,852 INFO L478 AbstractCegarLoop]: Abstraction has 281 states and 284 transitions. [2022-04-06 15:04:26,852 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 2.022222222222222) internal successors, (273), 134 states have internal predecessors, (273), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 15:04:26,852 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 284 transitions. [2022-04-06 15:04:26,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2022-04-06 15:04:26,853 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:04:26,853 INFO L499 BasicCegarLoop]: trace histogram [134, 132, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:04:26,868 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2022-04-06 15:04:27,055 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265,SelfDestructingSolverStorable266 [2022-04-06 15:04:27,055 INFO L403 AbstractCegarLoop]: === Iteration 136 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:04:27,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:04:27,056 INFO L85 PathProgramCache]: Analyzing trace with hash 576333485, now seen corresponding path program 265 times [2022-04-06 15:04:27,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:04:27,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [209052705] [2022-04-06 15:04:27,071 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 15:04:27,112 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 15:04:27,113 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:04:27,113 INFO L85 PathProgramCache]: Analyzing trace with hash 558976943, now seen corresponding path program 1 times [2022-04-06 15:04:27,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:04:27,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091933029] [2022-04-06 15:04:27,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:04:27,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:04:27,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 15:04:27,115 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 15:04:27,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 15:04:27,116 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 15:04:27,117 INFO L85 PathProgramCache]: Analyzing trace with hash 576333485, now seen corresponding path program 266 times [2022-04-06 15:04:27,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:04:27,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725668462] [2022-04-06 15:04:27,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:04:27,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:04:27,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:04:30,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:04:30,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:04:30,963 INFO L134 CoverageAnalysis]: Checked inductivity of 17956 backedges. 399 proven. 17556 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:04:30,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:04:30,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725668462] [2022-04-06 15:04:30,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725668462] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:04:30,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754219024] [2022-04-06 15:04:30,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 15:04:30,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:04:30,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:04:30,965 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:04:30,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-04-06 15:04:31,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 15:04:31,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:04:31,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 134 conjunts are in the unsatisfiable core [2022-04-06 15:04:31,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:04:31,313 INFO L134 CoverageAnalysis]: Checked inductivity of 17956 backedges. 399 proven. 17556 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:04:31,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:04:41,137 INFO L134 CoverageAnalysis]: Checked inductivity of 17956 backedges. 399 proven. 17556 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:04:41,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754219024] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:04:41,138 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 15:04:41,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [136, 135, 135] total 270 [2022-04-06 15:04:41,138 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:04:41,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [209052705] [2022-04-06 15:04:41,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [209052705] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:04:41,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:04:41,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [136] imperfect sequences [] total 136 [2022-04-06 15:04:41,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037487891] [2022-04-06 15:04:41,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:04:41,139 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2022-04-06 15:04:41,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:04:41,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2022-04-06 15:04:41,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36048, Invalid=36582, Unknown=0, NotChecked=0, Total=72630 [2022-04-06 15:04:41,144 INFO L87 Difference]: Start difference. First operand 281 states and 284 transitions. Second operand has 136 states, 136 states have (on average 2.0220588235294117) internal successors, (275), 135 states have internal predecessors, (275), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 15:04:45,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:04:45,076 INFO L93 Difference]: Finished difference Result 292 states and 298 transitions. [2022-04-06 15:04:45,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2022-04-06 15:04:45,076 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 2.0220588235294117) internal successors, (275), 135 states have internal predecessors, (275), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 279 [2022-04-06 15:04:45,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:04:45,077 INFO L225 Difference]: With dead ends: 292 [2022-04-06 15:04:45,077 INFO L226 Difference]: Without dead ends: 283 [2022-04-06 15:04:45,084 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 827 GetRequests, 426 SyntacticMatches, 0 SemanticMatches, 401 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9569 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=71826, Invalid=90180, Unknown=0, NotChecked=0, Total=162006 [2022-04-06 15:04:45,084 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 141 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 15:04:45,084 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 49 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 15:04:45,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-04-06 15:04:45,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 283. [2022-04-06 15:04:45,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 278 states have (on average 1.014388489208633) internal successors, (282), 278 states have internal predecessors, (282), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 15:04:45,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 286 transitions. [2022-04-06 15:04:45,094 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 286 transitions. Word has length 279 [2022-04-06 15:04:45,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:04:45,095 INFO L478 AbstractCegarLoop]: Abstraction has 283 states and 286 transitions. [2022-04-06 15:04:45,095 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 136 states have (on average 2.0220588235294117) internal successors, (275), 135 states have internal predecessors, (275), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 15:04:45,095 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 286 transitions. [2022-04-06 15:04:45,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2022-04-06 15:04:45,095 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:04:45,096 INFO L499 BasicCegarLoop]: trace histogram [135, 133, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:04:45,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2022-04-06 15:04:45,299 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267,SelfDestructingSolverStorable268 [2022-04-06 15:04:45,299 INFO L403 AbstractCegarLoop]: === Iteration 137 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:04:45,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:04:45,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1301762698, now seen corresponding path program 267 times [2022-04-06 15:04:45,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:04:45,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1140788587] [2022-04-06 15:04:45,315 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 15:04:45,357 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 15:04:45,357 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:04:45,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1686458193, now seen corresponding path program 1 times [2022-04-06 15:04:45,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:04:45,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548031096] [2022-04-06 15:04:45,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:04:45,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:04:45,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 15:04:45,360 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 15:04:45,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 15:04:45,361 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 15:04:45,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1301762698, now seen corresponding path program 268 times [2022-04-06 15:04:45,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:04:45,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389115706] [2022-04-06 15:04:45,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:04:45,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:04:45,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:04:48,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:04:48,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:04:48,937 INFO L134 CoverageAnalysis]: Checked inductivity of 18225 backedges. 402 proven. 17822 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:04:48,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:04:48,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389115706] [2022-04-06 15:04:48,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389115706] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:04:48,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257562946] [2022-04-06 15:04:48,937 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 15:04:48,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:04:48,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:04:48,938 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:04:48,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-04-06 15:04:49,014 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 15:04:49,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:04:49,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 597 conjuncts, 135 conjunts are in the unsatisfiable core [2022-04-06 15:04:49,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:04:49,234 INFO L134 CoverageAnalysis]: Checked inductivity of 18225 backedges. 402 proven. 17822 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:04:49,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:05:00,138 INFO L134 CoverageAnalysis]: Checked inductivity of 18225 backedges. 402 proven. 17822 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:05:00,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257562946] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:05:00,138 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 15:05:00,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [137, 136, 136] total 272 [2022-04-06 15:05:00,139 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:05:00,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1140788587] [2022-04-06 15:05:00,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1140788587] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:05:00,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:05:00,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [137] imperfect sequences [] total 137 [2022-04-06 15:05:00,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661622074] [2022-04-06 15:05:00,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:05:00,139 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2022-04-06 15:05:00,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:05:00,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2022-04-06 15:05:00,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36587, Invalid=37125, Unknown=0, NotChecked=0, Total=73712 [2022-04-06 15:05:00,143 INFO L87 Difference]: Start difference. First operand 283 states and 286 transitions. Second operand has 137 states, 137 states have (on average 2.021897810218978) internal successors, (277), 136 states have internal predecessors, (277), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 15:05:04,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:05:04,037 INFO L93 Difference]: Finished difference Result 294 states and 300 transitions. [2022-04-06 15:05:04,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-04-06 15:05:04,037 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 2.021897810218978) internal successors, (277), 136 states have internal predecessors, (277), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 281 [2022-04-06 15:05:04,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:05:04,038 INFO L225 Difference]: With dead ends: 294 [2022-04-06 15:05:04,038 INFO L226 Difference]: Without dead ends: 285 [2022-04-06 15:05:04,043 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 833 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 404 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9708 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=72902, Invalid=91528, Unknown=0, NotChecked=0, Total=164430 [2022-04-06 15:05:04,044 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 142 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 15:05:04,044 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 49 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 15:05:04,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-04-06 15:05:04,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 285. [2022-04-06 15:05:04,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 280 states have (on average 1.0142857142857142) internal successors, (284), 280 states have internal predecessors, (284), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 15:05:04,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 288 transitions. [2022-04-06 15:05:04,054 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 288 transitions. Word has length 281 [2022-04-06 15:05:04,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:05:04,055 INFO L478 AbstractCegarLoop]: Abstraction has 285 states and 288 transitions. [2022-04-06 15:05:04,056 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 2.021897810218978) internal successors, (277), 136 states have internal predecessors, (277), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 15:05:04,056 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 288 transitions. [2022-04-06 15:05:04,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2022-04-06 15:05:04,056 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:05:04,056 INFO L499 BasicCegarLoop]: trace histogram [136, 134, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:05:04,072 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2022-04-06 15:05:04,265 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270,SelfDestructingSolverStorable269 [2022-04-06 15:05:04,265 INFO L403 AbstractCegarLoop]: === Iteration 138 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:05:04,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:05:04,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1640432857, now seen corresponding path program 269 times [2022-04-06 15:05:04,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:05:04,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [735100271] [2022-04-06 15:05:04,287 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 15:05:04,319 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 15:05:04,319 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:05:04,319 INFO L85 PathProgramCache]: Analyzing trace with hash 363073967, now seen corresponding path program 1 times [2022-04-06 15:05:04,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:05:04,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554278607] [2022-04-06 15:05:04,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:05:04,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:05:04,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 15:05:04,321 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 15:05:04,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 15:05:04,323 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 15:05:04,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1640432857, now seen corresponding path program 270 times [2022-04-06 15:05:04,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:05:04,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808973933] [2022-04-06 15:05:04,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:05:04,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:05:04,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:05:07,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:05:07,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:05:07,841 INFO L134 CoverageAnalysis]: Checked inductivity of 18496 backedges. 405 proven. 18090 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:05:07,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:05:07,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808973933] [2022-04-06 15:05:07,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808973933] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:05:07,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3930908] [2022-04-06 15:05:07,842 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 15:05:07,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:05:07,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:05:07,843 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:05:07,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-04-06 15:05:07,883 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 15:05:07,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:05:07,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 15:05:07,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:05:08,269 INFO L134 CoverageAnalysis]: Checked inductivity of 18496 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 18090 trivial. 0 not checked. [2022-04-06 15:05:08,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:05:08,603 INFO L134 CoverageAnalysis]: Checked inductivity of 18496 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 18090 trivial. 0 not checked. [2022-04-06 15:05:08,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3930908] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:05:08,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 15:05:08,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [138, 8, 8] total 148 [2022-04-06 15:05:08,604 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:05:08,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [735100271] [2022-04-06 15:05:08,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [735100271] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:05:08,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:05:08,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [138] imperfect sequences [] total 138 [2022-04-06 15:05:08,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612645003] [2022-04-06 15:05:08,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:05:08,605 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2022-04-06 15:05:08,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:05:08,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2022-04-06 15:05:08,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9358, Invalid=12398, Unknown=0, NotChecked=0, Total=21756 [2022-04-06 15:05:08,607 INFO L87 Difference]: Start difference. First operand 285 states and 288 transitions. Second operand has 138 states, 138 states have (on average 2.0217391304347827) internal successors, (279), 137 states have internal predecessors, (279), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 15:05:12,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:05:12,981 INFO L93 Difference]: Finished difference Result 296 states and 302 transitions. [2022-04-06 15:05:12,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-04-06 15:05:12,982 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 2.0217391304347827) internal successors, (279), 137 states have internal predecessors, (279), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 283 [2022-04-06 15:05:12,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:05:12,982 INFO L225 Difference]: With dead ends: 296 [2022-04-06 15:05:12,982 INFO L226 Difference]: Without dead ends: 287 [2022-04-06 15:05:12,986 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 839 GetRequests, 557 SyntacticMatches, 1 SemanticMatches, 281 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11078 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=27988, Invalid=51818, Unknown=0, NotChecked=0, Total=79806 [2022-04-06 15:05:12,996 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 143 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 15:05:12,996 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 34 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 15:05:12,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-04-06 15:05:13,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2022-04-06 15:05:13,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 282 states have (on average 1.0141843971631206) internal successors, (286), 282 states have internal predecessors, (286), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 15:05:13,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 290 transitions. [2022-04-06 15:05:13,006 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 290 transitions. Word has length 283 [2022-04-06 15:05:13,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:05:13,007 INFO L478 AbstractCegarLoop]: Abstraction has 287 states and 290 transitions. [2022-04-06 15:05:13,007 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 138 states have (on average 2.0217391304347827) internal successors, (279), 137 states have internal predecessors, (279), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 15:05:13,007 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 290 transitions. [2022-04-06 15:05:13,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2022-04-06 15:05:13,008 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:05:13,008 INFO L499 BasicCegarLoop]: trace histogram [137, 135, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:05:13,023 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2022-04-06 15:05:13,223 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,SelfDestructingSolverStorable271,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:05:13,223 INFO L403 AbstractCegarLoop]: === Iteration 139 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:05:13,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:05:13,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1293086852, now seen corresponding path program 271 times [2022-04-06 15:05:13,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:05:13,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [565033295] [2022-04-06 15:05:13,240 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 15:05:13,274 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 15:05:13,274 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:05:13,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1882361169, now seen corresponding path program 1 times [2022-04-06 15:05:13,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:05:13,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433412554] [2022-04-06 15:05:13,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:05:13,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:05:13,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 15:05:13,277 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 15:05:13,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 15:05:13,278 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 15:05:13,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1293086852, now seen corresponding path program 272 times [2022-04-06 15:05:13,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:05:13,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444422714] [2022-04-06 15:05:13,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:05:13,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:05:13,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:05:16,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:05:16,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:05:16,527 INFO L134 CoverageAnalysis]: Checked inductivity of 18769 backedges. 408 proven. 18360 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:05:16,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:05:16,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444422714] [2022-04-06 15:05:16,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444422714] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:05:16,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019156197] [2022-04-06 15:05:16,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 15:05:16,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:05:16,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:05:16,529 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:05:16,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-04-06 15:05:16,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 15:05:16,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:05:16,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 137 conjunts are in the unsatisfiable core [2022-04-06 15:05:16,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:05:16,824 INFO L134 CoverageAnalysis]: Checked inductivity of 18769 backedges. 408 proven. 18360 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:05:16,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:05:26,611 INFO L134 CoverageAnalysis]: Checked inductivity of 18769 backedges. 408 proven. 18360 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:05:26,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019156197] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:05:26,611 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 15:05:26,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [139, 138, 138] total 276 [2022-04-06 15:05:26,611 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:05:26,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [565033295] [2022-04-06 15:05:26,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [565033295] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:05:26,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:05:26,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [139] imperfect sequences [] total 139 [2022-04-06 15:05:26,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462353280] [2022-04-06 15:05:26,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:05:26,614 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2022-04-06 15:05:26,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:05:26,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2022-04-06 15:05:26,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37677, Invalid=38223, Unknown=0, NotChecked=0, Total=75900 [2022-04-06 15:05:26,619 INFO L87 Difference]: Start difference. First operand 287 states and 290 transitions. Second operand has 139 states, 139 states have (on average 2.0215827338129495) internal successors, (281), 138 states have internal predecessors, (281), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 15:05:30,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:05:30,988 INFO L93 Difference]: Finished difference Result 298 states and 304 transitions. [2022-04-06 15:05:30,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-04-06 15:05:30,989 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 2.0215827338129495) internal successors, (281), 138 states have internal predecessors, (281), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 285 [2022-04-06 15:05:30,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:05:30,989 INFO L225 Difference]: With dead ends: 298 [2022-04-06 15:05:30,989 INFO L226 Difference]: Without dead ends: 289 [2022-04-06 15:05:30,995 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 845 GetRequests, 435 SyntacticMatches, 0 SemanticMatches, 410 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9989 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=75078, Invalid=94254, Unknown=0, NotChecked=0, Total=169332 [2022-04-06 15:05:30,995 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 144 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 15:05:30,995 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 44 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 15:05:30,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-04-06 15:05:31,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2022-04-06 15:05:31,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 284 states have (on average 1.0140845070422535) internal successors, (288), 284 states have internal predecessors, (288), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 15:05:31,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 292 transitions. [2022-04-06 15:05:31,006 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 292 transitions. Word has length 285 [2022-04-06 15:05:31,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:05:31,006 INFO L478 AbstractCegarLoop]: Abstraction has 289 states and 292 transitions. [2022-04-06 15:05:31,006 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 139 states have (on average 2.0215827338129495) internal successors, (281), 138 states have internal predecessors, (281), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 15:05:31,006 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 292 transitions. [2022-04-06 15:05:31,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2022-04-06 15:05:31,007 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:05:31,007 INFO L499 BasicCegarLoop]: trace histogram [138, 136, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:05:31,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Forceful destruction successful, exit code 0 [2022-04-06 15:05:31,222 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,SelfDestructingSolverStorable274,137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:05:31,223 INFO L403 AbstractCegarLoop]: === Iteration 140 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:05:31,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:05:31,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1387986271, now seen corresponding path program 273 times [2022-04-06 15:05:31,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:05:31,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1147566873] [2022-04-06 15:05:31,243 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 15:05:31,272 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 15:05:31,273 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:05:31,273 INFO L85 PathProgramCache]: Analyzing trace with hash 167170991, now seen corresponding path program 1 times [2022-04-06 15:05:31,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:05:31,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758491853] [2022-04-06 15:05:31,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:05:31,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:05:31,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 15:05:31,275 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 15:05:31,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 15:05:31,277 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 15:05:31,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1387986271, now seen corresponding path program 274 times [2022-04-06 15:05:31,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:05:31,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259139591] [2022-04-06 15:05:31,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:05:31,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:05:31,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:05:34,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:05:34,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:05:34,525 INFO L134 CoverageAnalysis]: Checked inductivity of 19044 backedges. 411 proven. 18632 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:05:34,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:05:34,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259139591] [2022-04-06 15:05:34,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259139591] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:05:34,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227924210] [2022-04-06 15:05:34,526 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 15:05:34,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:05:34,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:05:34,527 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:05:34,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-04-06 15:05:34,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 15:05:34,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:05:34,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 138 conjunts are in the unsatisfiable core [2022-04-06 15:05:34,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:05:34,835 INFO L134 CoverageAnalysis]: Checked inductivity of 19044 backedges. 411 proven. 18632 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:05:34,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:05:44,656 INFO L134 CoverageAnalysis]: Checked inductivity of 19044 backedges. 411 proven. 18632 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:05:44,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227924210] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:05:44,657 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 15:05:44,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [140, 139, 139] total 278 [2022-04-06 15:05:44,657 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:05:44,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1147566873] [2022-04-06 15:05:44,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1147566873] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:05:44,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:05:44,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [140] imperfect sequences [] total 140 [2022-04-06 15:05:44,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268805636] [2022-04-06 15:05:44,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:05:44,657 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-04-06 15:05:44,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:05:44,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-04-06 15:05:44,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38228, Invalid=38778, Unknown=0, NotChecked=0, Total=77006 [2022-04-06 15:05:44,662 INFO L87 Difference]: Start difference. First operand 289 states and 292 transitions. Second operand has 140 states, 140 states have (on average 2.0214285714285714) internal successors, (283), 139 states have internal predecessors, (283), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)