/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/watermelon.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 15:02:56,371 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 15:02:56,415 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 15:02:56,457 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 15:02:56,507 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 15:02:56,508 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 15:02:56,513 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 15:02:56,514 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 15:02:56,522 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 15:02:56,522 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 15:02:56,523 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 15:02:56,523 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 15:02:56,524 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 15:02:56,524 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 15:02:56,524 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 15:02:56,524 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 15:02:56,524 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 15:02:56,524 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 15:02:56,524 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 15:02:56,524 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 15:02:56,525 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 15:02:56,525 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 15:02:56,525 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 15:02:56,525 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 15:02:56,525 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 15:02:56,525 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 15:02:56,525 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 15:02:56,525 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 15:02:56,526 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 15:02:56,526 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 15:02:56,526 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 15:02:56,526 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 15:02:56,526 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-04-06 15:02:56,526 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 15:02:56,726 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 15:02:56,744 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 15:02:56,745 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 15:02:56,746 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 15:02:56,747 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 15:02:56,748 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/watermelon.c [2022-04-06 15:02:56,799 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8323bd856/d02026da3af14ed2b625b5621caf3475/FLAG3f2c79205 [2022-04-06 15:02:57,200 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 15:02:57,201 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/watermelon.c [2022-04-06 15:02:57,214 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8323bd856/d02026da3af14ed2b625b5621caf3475/FLAG3f2c79205 [2022-04-06 15:02:57,228 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8323bd856/d02026da3af14ed2b625b5621caf3475 [2022-04-06 15:02:57,230 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 15:02:57,232 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 15:02:57,234 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 15:02:57,234 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 15:02:57,237 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 15:02:57,238 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 03:02:57" (1/1) ... [2022-04-06 15:02:57,239 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a29f394 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:02:57, skipping insertion in model container [2022-04-06 15:02:57,239 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 03:02:57" (1/1) ... [2022-04-06 15:02:57,245 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 15:02:57,263 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 15:02:57,439 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/watermelon.c[373,386] [2022-04-06 15:02:57,458 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 15:02:57,464 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 15:02:57,474 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/watermelon.c[373,386] [2022-04-06 15:02:57,490 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 15:02:57,504 INFO L208 MainTranslator]: Completed translation [2022-04-06 15:02:57,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:02:57 WrapperNode [2022-04-06 15:02:57,504 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 15:02:57,505 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 15:02:57,505 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 15:02:57,505 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 15:02:57,514 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:02:57" (1/1) ... [2022-04-06 15:02:57,514 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:02:57" (1/1) ... [2022-04-06 15:02:57,521 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:02:57" (1/1) ... [2022-04-06 15:02:57,522 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:02:57" (1/1) ... [2022-04-06 15:02:57,531 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:02:57" (1/1) ... [2022-04-06 15:02:57,536 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:02:57" (1/1) ... [2022-04-06 15:02:57,540 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:02:57" (1/1) ... [2022-04-06 15:02:57,543 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 15:02:57,544 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 15:02:57,544 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 15:02:57,544 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 15:02:57,545 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:02:57" (1/1) ... [2022-04-06 15:02:57,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 15:02:57,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:02:57,572 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 15:02:57,593 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 15:02:57,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 15:02:57,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 15:02:57,614 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 15:02:57,615 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 15:02:57,615 INFO L138 BoogieDeclarations]: Found implementation of procedure correct_version [2022-04-06 15:02:57,615 INFO L138 BoogieDeclarations]: Found implementation of procedure student_version [2022-04-06 15:02:57,615 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 15:02:57,615 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 15:02:57,615 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 15:02:57,616 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 15:02:57,616 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 15:02:57,616 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-04-06 15:02:57,617 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 15:02:57,617 INFO L130 BoogieDeclarations]: Found specification of procedure correct_version [2022-04-06 15:02:57,617 INFO L130 BoogieDeclarations]: Found specification of procedure student_version [2022-04-06 15:02:57,617 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 15:02:57,617 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 15:02:57,617 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 15:02:57,617 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 15:02:57,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 15:02:57,618 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 15:02:57,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 15:02:57,680 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 15:02:57,681 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 15:02:57,827 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 15:02:57,831 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 15:02:57,832 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-06 15:02:57,833 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 03:02:57 BoogieIcfgContainer [2022-04-06 15:02:57,833 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 15:02:57,835 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 15:02:57,835 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 15:02:57,837 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 15:02:57,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 03:02:57" (1/3) ... [2022-04-06 15:02:57,838 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42a901b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 03:02:57, skipping insertion in model container [2022-04-06 15:02:57,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:02:57" (2/3) ... [2022-04-06 15:02:57,838 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42a901b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 03:02:57, skipping insertion in model container [2022-04-06 15:02:57,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 03:02:57" (3/3) ... [2022-04-06 15:02:57,839 INFO L111 eAbstractionObserver]: Analyzing ICFG watermelon.c [2022-04-06 15:02:57,843 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 15:02:57,843 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 15:02:57,876 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 15:02:57,881 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 15:02:57,882 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 15:02:57,893 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 29 states have internal predecessors, (38), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 15:02:57,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-06 15:02:57,900 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:02:57,904 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:02:57,904 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:02:57,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:02:57,909 INFO L85 PathProgramCache]: Analyzing trace with hash 345664661, now seen corresponding path program 1 times [2022-04-06 15:02:57,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:02:57,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [320858082] [2022-04-06 15:02:57,942 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:02:57,943 INFO L85 PathProgramCache]: Analyzing trace with hash 345664661, now seen corresponding path program 2 times [2022-04-06 15:02:57,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:02:57,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369990870] [2022-04-06 15:02:57,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:02:57,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:02:58,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:02:58,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:02:58,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:02:58,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 15:02:58,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:02:58,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-04-06 15:02:58,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:02:58,331 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 15:02:58,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:02:58,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369990870] [2022-04-06 15:02:58,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369990870] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:02:58,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:02:58,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 15:02:58,335 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:02:58,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [320858082] [2022-04-06 15:02:58,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [320858082] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:02:58,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:02:58,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 15:02:58,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254832746] [2022-04-06 15:02:58,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:02:58,340 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 15:02:58,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:02:58,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 15:02:58,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-04-06 15:02:58,366 INFO L87 Difference]: Start difference. First operand has 39 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 29 states have internal predecessors, (38), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 9 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:02:58,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:02:58,949 INFO L93 Difference]: Finished difference Result 91 states and 114 transitions. [2022-04-06 15:02:58,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 15:02:58,952 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 9 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2022-04-06 15:02:58,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:02:58,966 INFO L225 Difference]: With dead ends: 91 [2022-04-06 15:02:58,966 INFO L226 Difference]: Without dead ends: 42 [2022-04-06 15:02:58,969 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-04-06 15:02:58,972 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 63 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 15:02:58,973 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 89 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 15:02:58,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-04-06 15:02:59,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2022-04-06 15:02:59,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 30 states have internal predecessors, (34), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 15:02:59,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2022-04-06 15:02:59,009 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 25 [2022-04-06 15:02:59,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:02:59,009 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2022-04-06 15:02:59,009 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 9 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:02:59,010 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2022-04-06 15:02:59,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-06 15:02:59,011 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:02:59,011 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:02:59,012 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 15:02:59,012 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:02:59,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:02:59,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1324779677, now seen corresponding path program 1 times [2022-04-06 15:02:59,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:02:59,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1466319865] [2022-04-06 15:02:59,014 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:02:59,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1324779677, now seen corresponding path program 2 times [2022-04-06 15:02:59,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:02:59,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712614636] [2022-04-06 15:02:59,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:02:59,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:02:59,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:02:59,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:02:59,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:02:59,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 15:02:59,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:02:59,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-04-06 15:02:59,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:02:59,078 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 15:02:59,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:02:59,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712614636] [2022-04-06 15:02:59,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712614636] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:02:59,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:02:59,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 15:02:59,079 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:02:59,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1466319865] [2022-04-06 15:02:59,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1466319865] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:02:59,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:02:59,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 15:02:59,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552255075] [2022-04-06 15:02:59,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:02:59,081 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 15:02:59,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:02:59,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 15:02:59,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 15:02:59,082 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 15:02:59,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:02:59,138 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2022-04-06 15:02:59,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 15:02:59,139 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 27 [2022-04-06 15:02:59,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:02:59,140 INFO L225 Difference]: With dead ends: 55 [2022-04-06 15:02:59,140 INFO L226 Difference]: Without dead ends: 42 [2022-04-06 15:02:59,141 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 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 15:02:59,142 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 29 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 15:02:59,142 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 33 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 15:02:59,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-04-06 15:02:59,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2022-04-06 15:02:59,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.206896551724138) internal successors, (35), 31 states have internal predecessors, (35), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 15:02:59,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2022-04-06 15:02:59,153 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 27 [2022-04-06 15:02:59,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:02:59,153 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2022-04-06 15:02:59,154 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 15:02:59,154 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2022-04-06 15:02:59,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-06 15:02:59,155 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:02:59,155 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:02:59,155 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 15:02:59,155 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:02:59,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:02:59,156 INFO L85 PathProgramCache]: Analyzing trace with hash -855151641, now seen corresponding path program 1 times [2022-04-06 15:02:59,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:02:59,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1952977017] [2022-04-06 15:02:59,157 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:02:59,157 INFO L85 PathProgramCache]: Analyzing trace with hash -855151641, now seen corresponding path program 2 times [2022-04-06 15:02:59,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:02:59,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314687226] [2022-04-06 15:02:59,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:02:59,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:02:59,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:02:59,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:02:59,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:02:59,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 15:02:59,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:02:59,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 15:02:59,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:02:59,215 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 15:02:59,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:02:59,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314687226] [2022-04-06 15:02:59,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314687226] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:02:59,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:02:59,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 15:02:59,216 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:02:59,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1952977017] [2022-04-06 15:02:59,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1952977017] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:02:59,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:02:59,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 15:02:59,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631507618] [2022-04-06 15:02:59,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:02:59,218 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 15:02:59,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:02:59,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 15:02:59,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 15:02:59,219 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:02:59,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:02:59,271 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2022-04-06 15:02:59,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 15:02:59,272 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2022-04-06 15:02:59,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:02:59,273 INFO L225 Difference]: With dead ends: 72 [2022-04-06 15:02:59,273 INFO L226 Difference]: Without dead ends: 43 [2022-04-06 15:02:59,273 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 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 15:02:59,274 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 29 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 15:02:59,275 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 33 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 15:02:59,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-04-06 15:02:59,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2022-04-06 15:02:59,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.2) internal successors, (36), 32 states have internal predecessors, (36), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 15:02:59,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2022-04-06 15:02:59,284 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 27 [2022-04-06 15:02:59,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:02:59,284 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2022-04-06 15:02:59,284 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:02:59,284 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2022-04-06 15:02:59,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 15:02:59,285 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:02:59,285 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:02:59,285 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-06 15:02:59,286 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:02:59,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:02:59,286 INFO L85 PathProgramCache]: Analyzing trace with hash 743790053, now seen corresponding path program 1 times [2022-04-06 15:02:59,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:02:59,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1449947583] [2022-04-06 15:02:59,390 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 15:02:59,391 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:02:59,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1203586262, now seen corresponding path program 1 times [2022-04-06 15:02:59,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:02:59,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269924028] [2022-04-06 15:02:59,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:02:59,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:02:59,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:02:59,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:02:59,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:02:59,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 15:02:59,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:02:59,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-04-06 15:02:59,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:02:59,518 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 15:02:59,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:02:59,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269924028] [2022-04-06 15:02:59,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269924028] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:02:59,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:02:59,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 15:02:59,719 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:02:59,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1449947583] [2022-04-06 15:02:59,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1449947583] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:02:59,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:02:59,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 15:02:59,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039399200] [2022-04-06 15:02:59,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:02:59,722 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 15:02:59,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:02:59,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 15:02:59,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-04-06 15:02:59,724 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:02:59,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:02:59,967 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2022-04-06 15:02:59,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 15:02:59,968 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2022-04-06 15:02:59,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:02:59,971 INFO L225 Difference]: With dead ends: 56 [2022-04-06 15:02:59,971 INFO L226 Difference]: Without dead ends: 45 [2022-04-06 15:02:59,974 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-04-06 15:02:59,975 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 51 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 15:02:59,975 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 58 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 240 Invalid, 0 Unknown, 18 Unchecked, 0.1s Time] [2022-04-06 15:02:59,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-04-06 15:02:59,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2022-04-06 15:02:59,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 15:02:59,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2022-04-06 15:02:59,992 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 29 [2022-04-06 15:02:59,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:02:59,993 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2022-04-06 15:02:59,994 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:02:59,995 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2022-04-06 15:02:59,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 15:02:59,996 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:02:59,996 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:02:59,996 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-04-06 15:02:59,996 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:02:59,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:02:59,997 INFO L85 PathProgramCache]: Analyzing trace with hash 198429957, now seen corresponding path program 1 times [2022-04-06 15:02:59,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:02:59,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [640545418] [2022-04-06 15:03:00,057 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 15:03:00,057 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:03:00,058 INFO L85 PathProgramCache]: Analyzing trace with hash -755394225, now seen corresponding path program 1 times [2022-04-06 15:03:00,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:03:00,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206921724] [2022-04-06 15:03:00,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:03:00,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:03:00,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:03:00,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:03:00,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:03:00,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 15:03:00,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:03:00,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 15:03:00,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:03:00,212 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 15:03:00,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:03:00,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206921724] [2022-04-06 15:03:00,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206921724] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:03:00,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:03:00,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 15:03:00,354 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:03:00,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [640545418] [2022-04-06 15:03:00,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [640545418] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:03:00,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:03:00,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 15:03:00,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878434223] [2022-04-06 15:03:00,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:03:00,355 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 15:03:00,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:03:00,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 15:03:00,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-04-06 15:03:00,356 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:03:00,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:03:00,559 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2022-04-06 15:03:00,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 15:03:00,560 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2022-04-06 15:03:00,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:03:00,561 INFO L225 Difference]: With dead ends: 51 [2022-04-06 15:03:00,561 INFO L226 Difference]: Without dead ends: 42 [2022-04-06 15:03:00,562 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-04-06 15:03:00,563 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 65 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 15:03:00,567 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 51 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 178 Invalid, 0 Unknown, 6 Unchecked, 0.1s Time] [2022-04-06 15:03:00,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-04-06 15:03:00,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-04-06 15:03:00,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 32 states have internal predecessors, (34), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 15:03:00,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2022-04-06 15:03:00,580 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 29 [2022-04-06 15:03:00,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:03:00,581 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2022-04-06 15:03:00,581 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:03:00,581 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2022-04-06 15:03:00,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 15:03:00,582 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:03:00,582 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:03:00,582 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-04-06 15:03:00,582 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:03:00,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:03:00,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1589989783, now seen corresponding path program 1 times [2022-04-06 15:03:00,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:03:00,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1211938537] [2022-04-06 15:03:00,623 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 15:03:00,623 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:03:00,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1886734625, now seen corresponding path program 1 times [2022-04-06 15:03:00,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:03:00,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659312650] [2022-04-06 15:03:00,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:03:00,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:03:00,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:03:00,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:03:00,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:03:00,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 15:03:00,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:03:00,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 15:03:00,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:03:00,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 15:03:00,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:03:00,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659312650] [2022-04-06 15:03:00,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659312650] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:03:00,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218715632] [2022-04-06 15:03:00,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:03:00,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:03:00,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:03:00,699 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 15:03:00,706 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 15:03:00,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:03:00,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 15:03:00,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:03:00,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 15:03:00,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:03:00,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 15:03:00,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218715632] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:03:00,963 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 15:03:00,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2022-04-06 15:03:00,978 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:03:00,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1211938537] [2022-04-06 15:03:00,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1211938537] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:03:00,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:03:00,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 15:03:00,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257788173] [2022-04-06 15:03:00,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:03:00,979 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 15:03:00,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:03:00,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 15:03:00,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-04-06 15:03:00,980 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 15:03:01,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:03:01,099 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2022-04-06 15:03:01,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 15:03:01,103 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 33 [2022-04-06 15:03:01,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:03:01,104 INFO L225 Difference]: With dead ends: 58 [2022-04-06 15:03:01,104 INFO L226 Difference]: Without dead ends: 45 [2022-04-06 15:03:01,104 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2022-04-06 15:03:01,105 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 36 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 15:03:01,105 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 39 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 15:03:01,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-04-06 15:03:01,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2022-04-06 15:03:01,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 32 states have (on average 1.125) internal successors, (36), 34 states have internal predecessors, (36), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 15:03:01,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2022-04-06 15:03:01,114 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 33 [2022-04-06 15:03:01,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:03:01,115 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2022-04-06 15:03:01,115 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 15:03:01,115 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2022-04-06 15:03:01,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-06 15:03:01,116 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:03:01,116 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:03:01,140 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-06 15:03:01,340 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-04-06 15:03:01,340 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:03:01,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:03:01,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1518564121, now seen corresponding path program 2 times [2022-04-06 15:03:01,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:03:01,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2027078495] [2022-04-06 15:03:01,377 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 15:03:01,377 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:03:01,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1283063907, now seen corresponding path program 1 times [2022-04-06 15:03:01,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:03:01,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740320928] [2022-04-06 15:03:01,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:03:01,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:03:01,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:03:01,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:03:01,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:03:01,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 15:03:01,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:03:01,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 15:03:01,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:03:01,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 15:03:01,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:03:01,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740320928] [2022-04-06 15:03:01,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740320928] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:03:01,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142440018] [2022-04-06 15:03:01,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:03:01,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:03:01,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:03:01,652 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 15:03:01,653 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 15:03:01,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:03:01,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 15:03:01,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:03:02,065 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 15:03:02,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:03:02,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 15:03:02,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142440018] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:03:02,704 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 15:03:02,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 31 [2022-04-06 15:03:05,245 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:03:05,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2027078495] [2022-04-06 15:03:05,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2027078495] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:03:05,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:03:05,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 15:03:05,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337989010] [2022-04-06 15:03:05,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:03:05,246 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 15:03:05,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:03:05,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 15:03:05,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1191, Unknown=1, NotChecked=0, Total=1406 [2022-04-06 15:03:05,247 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 20 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:03:07,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:03:07,693 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2022-04-06 15:03:07,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 15:03:07,694 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2022-04-06 15:03:07,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:03:07,695 INFO L225 Difference]: With dead ends: 62 [2022-04-06 15:03:07,695 INFO L226 Difference]: Without dead ends: 56 [2022-04-06 15:03:07,696 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 52 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=324, Invalid=1930, Unknown=2, NotChecked=0, Total=2256 [2022-04-06 15:03:07,697 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 68 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 15:03:07,697 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 62 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 221 Invalid, 0 Unknown, 48 Unchecked, 0.2s Time] [2022-04-06 15:03:07,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-04-06 15:03:07,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2022-04-06 15:03:07,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 37 states have internal predecessors, (41), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 15:03:07,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2022-04-06 15:03:07,708 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 35 [2022-04-06 15:03:07,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:03:07,708 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2022-04-06 15:03:07,708 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:03:07,708 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2022-04-06 15:03:07,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-06 15:03:07,709 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:03:07,709 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:03:07,740 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 15:03:07,927 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 [2022-04-06 15:03:07,928 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:03:07,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:03:07,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1057360469, now seen corresponding path program 1 times [2022-04-06 15:03:07,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:03:07,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2019244975] [2022-04-06 15:03:07,967 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 15:03:07,968 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:03:07,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1117591585, now seen corresponding path program 1 times [2022-04-06 15:03:07,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:03:07,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322039830] [2022-04-06 15:03:07,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:03:07,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:03:07,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:03:07,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:03:07,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:03:08,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 15:03:08,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:03:08,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 15:03:08,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:03:08,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 15:03:08,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:03:08,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322039830] [2022-04-06 15:03:08,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322039830] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:03:08,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064879054] [2022-04-06 15:03:08,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:03:08,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:03:08,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:03:08,041 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 15:03:08,074 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 15:03:08,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:03:08,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 15:03:08,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:03:08,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 15:03:08,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:03:08,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 15:03:08,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064879054] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:03:08,249 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 15:03:08,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 11 [2022-04-06 15:03:08,267 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:03:08,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2019244975] [2022-04-06 15:03:08,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2019244975] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:03:08,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:03:08,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 15:03:08,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547292137] [2022-04-06 15:03:08,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:03:08,268 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 15:03:08,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:03:08,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 15:03:08,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-04-06 15:03:08,269 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 15:03:08,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:03:08,457 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2022-04-06 15:03:08,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 15:03:08,458 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2022-04-06 15:03:08,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:03:08,459 INFO L225 Difference]: With dead ends: 59 [2022-04-06 15:03:08,459 INFO L226 Difference]: Without dead ends: 50 [2022-04-06 15:03:08,459 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 79 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2022-04-06 15:03:08,460 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 45 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 15:03:08,460 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 47 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 15:03:08,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-04-06 15:03:08,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2022-04-06 15:03:08,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 37 states have internal predecessors, (40), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 15:03:08,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2022-04-06 15:03:08,470 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 35 [2022-04-06 15:03:08,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:03:08,470 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2022-04-06 15:03:08,470 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 15:03:08,470 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2022-04-06 15:03:08,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-06 15:03:08,471 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:03:08,475 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:03:08,504 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 15:03:08,691 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:03:08,692 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:03:08,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:03:08,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1737418839, now seen corresponding path program 1 times [2022-04-06 15:03:08,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:03:08,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1774104693] [2022-04-06 15:03:08,737 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 15:03:08,738 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:03:08,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1917982241, now seen corresponding path program 1 times [2022-04-06 15:03:08,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:03:08,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60997581] [2022-04-06 15:03:08,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:03:08,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:03:08,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:03:08,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:03:08,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:03:08,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 15:03:08,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:03:08,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 15:03:08,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:03:08,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 15:03:08,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:03:08,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60997581] [2022-04-06 15:03:08,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60997581] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:03:08,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:03:08,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 15:03:08,887 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:03:08,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1774104693] [2022-04-06 15:03:08,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1774104693] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:03:08,888 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:03:08,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 15:03:08,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204126314] [2022-04-06 15:03:08,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:03:08,889 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 15:03:08,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:03:08,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 15:03:08,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-04-06 15:03:08,889 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:03:09,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:03:09,300 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2022-04-06 15:03:09,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 15:03:09,302 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2022-04-06 15:03:09,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:03:09,302 INFO L225 Difference]: With dead ends: 58 [2022-04-06 15:03:09,303 INFO L226 Difference]: Without dead ends: 48 [2022-04-06 15:03:09,303 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2022-04-06 15:03:09,304 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 43 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 15:03:09,304 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 69 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 15:03:09,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-04-06 15:03:09,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2022-04-06 15:03:09,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 36 states have internal predecessors, (38), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-06 15:03:09,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2022-04-06 15:03:09,315 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 35 [2022-04-06 15:03:09,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:03:09,315 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2022-04-06 15:03:09,315 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:03:09,315 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2022-04-06 15:03:09,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 15:03:09,316 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:03:09,316 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:03:09,317 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-04-06 15:03:09,317 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:03:09,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:03:09,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1597979675, now seen corresponding path program 3 times [2022-04-06 15:03:09,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:03:09,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1035865222] [2022-04-06 15:03:09,372 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 15:03:09,372 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:03:09,373 INFO L85 PathProgramCache]: Analyzing trace with hash -771661915, now seen corresponding path program 1 times [2022-04-06 15:03:09,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:03:09,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976128676] [2022-04-06 15:03:09,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:03:09,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:03:09,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:03:09,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:03:09,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:03:09,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 15:03:09,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:03:09,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 15:03:09,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:03:09,658 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 15:03:09,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:03:09,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976128676] [2022-04-06 15:03:09,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976128676] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:03:09,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969393902] [2022-04-06 15:03:09,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:03:09,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:03:09,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:03:09,663 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 15:03:09,696 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 15:03:09,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:03:09,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 15:03:09,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:03:10,139 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 15:03:10,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:03:12,134 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 15:03:12,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969393902] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:03:12,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 15:03:12,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2022-04-06 15:03:39,848 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:03:39,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1035865222] [2022-04-06 15:03:39,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1035865222] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:03:39,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:03:39,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 15:03:39,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474668797] [2022-04-06 15:03:39,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:03:39,849 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 15:03:39,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:03:39,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 15:03:39,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1329, Unknown=9, NotChecked=0, Total=1560 [2022-04-06 15:03:39,850 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:03:46,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:03:46,534 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2022-04-06 15:03:46,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 15:03:46,535 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2022-04-06 15:03:46,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:03:46,536 INFO L225 Difference]: With dead ends: 75 [2022-04-06 15:03:46,536 INFO L226 Difference]: Without dead ends: 69 [2022-04-06 15:03:46,538 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 32.2s TimeCoverageRelationStatistics Valid=333, Invalid=2309, Unknown=10, NotChecked=0, Total=2652 [2022-04-06 15:03:46,538 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 63 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 15:03:46,538 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 90 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 374 Invalid, 0 Unknown, 138 Unchecked, 1.2s Time] [2022-04-06 15:03:46,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-04-06 15:03:46,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 60. [2022-04-06 15:03:46,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 49 states have internal predecessors, (53), 7 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-04-06 15:03:46,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2022-04-06 15:03:46,551 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 37 [2022-04-06 15:03:46,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:03:46,551 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2022-04-06 15:03:46,552 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:03:46,552 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2022-04-06 15:03:46,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 15:03:46,553 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:03:46,553 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:03:46,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 15:03:46,767 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:03:46,767 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:03:46,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:03:46,767 INFO L85 PathProgramCache]: Analyzing trace with hash 783907799, now seen corresponding path program 2 times [2022-04-06 15:03:46,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:03:46,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [464302736] [2022-04-06 15:03:46,870 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 15:03:46,870 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:03:46,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1383145567, now seen corresponding path program 1 times [2022-04-06 15:03:46,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:03:46,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751448652] [2022-04-06 15:03:46,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:03:46,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:03:46,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:03:46,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:03:46,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:03:47,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 15:03:47,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:03:47,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 15:03:47,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:03:48,168 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 15:03:48,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:03:48,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751448652] [2022-04-06 15:03:48,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751448652] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:03:48,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863449854] [2022-04-06 15:03:48,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:03:48,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:03:48,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:03:48,172 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 15:03:48,174 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 15:03:48,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:03:48,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 15:03:48,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:03:50,078 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 15:03:50,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:03:55,872 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 15:03:55,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863449854] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:03:55,872 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 15:03:55,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-04-06 15:04:05,575 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:04:05,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [464302736] [2022-04-06 15:04:05,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [464302736] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:04:05,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:04:05,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 15:04:05,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247781146] [2022-04-06 15:04:05,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:04:05,576 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 15:04:05,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:04:05,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 15:04:05,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=2090, Unknown=4, NotChecked=0, Total=2352 [2022-04-06 15:04:05,577 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 22 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:04:10,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:04:10,603 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2022-04-06 15:04:10,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 15:04:10,603 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2022-04-06 15:04:10,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:04:10,604 INFO L225 Difference]: With dead ends: 66 [2022-04-06 15:04:10,604 INFO L226 Difference]: Without dead ends: 52 [2022-04-06 15:04:10,605 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1296 ImplicationChecksByTransitivity, 18.8s TimeCoverageRelationStatistics Valid=392, Invalid=3385, Unknown=5, NotChecked=0, Total=3782 [2022-04-06 15:04:10,606 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 44 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 15:04:10,606 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 89 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 374 Invalid, 0 Unknown, 77 Unchecked, 1.1s Time] [2022-04-06 15:04:10,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-04-06 15:04:10,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-04-06 15:04:10,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 40 states have (on average 1.1) internal successors, (44), 42 states have internal predecessors, (44), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 15:04:10,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2022-04-06 15:04:10,619 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 37 [2022-04-06 15:04:10,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:04:10,619 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2022-04-06 15:04:10,619 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:04:10,619 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2022-04-06 15:04:10,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 15:04:10,620 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:04:10,620 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:04:10,640 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-04-06 15:04:10,835 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-04-06 15:04:10,836 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:04:10,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:04:10,836 INFO L85 PathProgramCache]: Analyzing trace with hash 606915741, now seen corresponding path program 4 times [2022-04-06 15:04:10,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:04:10,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [704178460] [2022-04-06 15:04:11,014 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 15:04:11,015 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:04:11,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1753442777, now seen corresponding path program 1 times [2022-04-06 15:04:11,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:04:11,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959086782] [2022-04-06 15:04:11,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:04:11,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:04:11,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:04:11,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:04:11,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:04:11,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 15:04:11,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:04:11,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 15:04:11,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:04:12,231 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 15:04:12,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:04:12,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959086782] [2022-04-06 15:04:12,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959086782] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:04:12,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846292316] [2022-04-06 15:04:12,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:04:12,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:04:12,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:04:12,233 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 15:04:12,234 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 15:04:12,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:04:12,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 15:04:12,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:04:13,549 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 15:04:13,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:04:19,014 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 15:04:19,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846292316] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:04:19,015 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 15:04:19,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 35 [2022-04-06 15:04:44,459 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:04:44,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [704178460] [2022-04-06 15:04:44,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [704178460] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:04:44,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:04:44,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 15:04:44,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295893620] [2022-04-06 15:04:44,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:04:44,460 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 15:04:44,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:04:44,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 15:04:44,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1477, Unknown=7, NotChecked=0, Total=1722 [2022-04-06 15:04:44,461 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:04:50,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:04:50,813 INFO L93 Difference]: Finished difference Result 67 states and 72 transitions. [2022-04-06 15:04:50,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 15:04:50,814 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2022-04-06 15:04:50,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:04:50,815 INFO L225 Difference]: With dead ends: 67 [2022-04-06 15:04:50,815 INFO L226 Difference]: Without dead ends: 61 [2022-04-06 15:04:50,816 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 909 ImplicationChecksByTransitivity, 32.4s TimeCoverageRelationStatistics Valid=348, Invalid=2506, Unknown=8, NotChecked=0, Total=2862 [2022-04-06 15:04:50,816 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 71 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 15:04:50,816 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 68 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 334 Invalid, 0 Unknown, 94 Unchecked, 0.9s Time] [2022-04-06 15:04:50,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-04-06 15:04:50,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 54. [2022-04-06 15:04:50,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 42 states have (on average 1.119047619047619) internal successors, (47), 44 states have internal predecessors, (47), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 15:04:50,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2022-04-06 15:04:50,831 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 39 [2022-04-06 15:04:50,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:04:50,831 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2022-04-06 15:04:50,831 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:04:50,831 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2022-04-06 15:04:50,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 15:04:50,832 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:04:50,832 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:04:50,854 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-04-06 15:04:51,051 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:04:51,052 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:04:51,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:04:51,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1449963591, now seen corresponding path program 5 times [2022-04-06 15:04:51,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:04:51,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [149709276] [2022-04-06 15:04:51,180 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 15:04:51,180 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:04:51,180 INFO L85 PathProgramCache]: Analyzing trace with hash -163897243, now seen corresponding path program 1 times [2022-04-06 15:04:51,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:04:51,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084477729] [2022-04-06 15:04:51,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:04:51,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:04:51,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:04:51,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:04:51,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:04:51,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 15:04:51,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:04:51,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 15:04:51,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:04:52,547 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 15:04:52,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:04:52,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084477729] [2022-04-06 15:04:52,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084477729] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:04:52,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90131706] [2022-04-06 15:04:52,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:04:52,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:04:52,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:04:52,549 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 15:04:52,549 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 15:04:52,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:04:52,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 15:04:52,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:04:53,689 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 15:04:53,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:04:57,861 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 15:04:57,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90131706] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:04:57,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 15:04:57,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2022-04-06 15:05:45,333 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:05:45,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [149709276] [2022-04-06 15:05:45,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [149709276] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:05:45,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:05:45,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 15:05:45,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621950930] [2022-04-06 15:05:45,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:05:45,334 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 15:05:45,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:05:45,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 15:05:45,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=1464, Unknown=18, NotChecked=0, Total=1722 [2022-04-06 15:05:45,335 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand has 23 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:05:53,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:05:53,263 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2022-04-06 15:05:53,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 15:05:53,264 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2022-04-06 15:05:53,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:05:53,264 INFO L225 Difference]: With dead ends: 66 [2022-04-06 15:05:53,264 INFO L226 Difference]: Without dead ends: 56 [2022-04-06 15:05:53,265 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 56.2s TimeCoverageRelationStatistics Valid=340, Invalid=2396, Unknown=20, NotChecked=0, Total=2756 [2022-04-06 15:05:53,266 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 58 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 15:05:53,266 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 56 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 258 Invalid, 0 Unknown, 13 Unchecked, 0.7s Time] [2022-04-06 15:05:53,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-04-06 15:05:53,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2022-04-06 15:05:53,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 44 states have internal predecessors, (46), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 15:05:53,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2022-04-06 15:05:53,279 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 39 [2022-04-06 15:05:53,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:05:53,280 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2022-04-06 15:05:53,280 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:05:53,280 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2022-04-06 15:05:53,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 15:05:53,280 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:05:53,280 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:05:53,296 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 15:05:53,481 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:05:53,481 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:05:53,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:05:53,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1677214879, now seen corresponding path program 6 times [2022-04-06 15:05:53,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:05:53,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [875232307] [2022-04-06 15:05:53,642 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 15:05:53,643 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:05:53,643 INFO L85 PathProgramCache]: Analyzing trace with hash -361884631, now seen corresponding path program 1 times [2022-04-06 15:05:53,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:05:53,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892033025] [2022-04-06 15:05:53,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:05:53,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:05:53,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:05:53,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:05:53,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:05:53,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 15:05:53,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:05:54,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 15:05:54,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:05:54,911 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 15:05:54,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:05:54,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892033025] [2022-04-06 15:05:54,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892033025] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:05:54,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237405876] [2022-04-06 15:05:54,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:05:54,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:05:54,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:05:54,913 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 15:05:54,915 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 15:05:54,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:05:54,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 15:05:54,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:05:56,237 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 15:05:56,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:06:02,269 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 15:06:02,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237405876] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:06:02,269 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 15:06:02,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 37 [2022-04-06 15:06:21,620 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:06:21,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [875232307] [2022-04-06 15:06:21,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [875232307] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:06:21,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:06:21,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 15:06:21,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856188417] [2022-04-06 15:06:21,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:06:21,621 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 15:06:21,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:06:21,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 15:06:21,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1631, Unknown=7, NotChecked=0, Total=1892 [2022-04-06 15:06:21,622 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:06:28,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:06:28,790 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2022-04-06 15:06:28,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 15:06:28,791 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2022-04-06 15:06:28,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:06:28,792 INFO L225 Difference]: With dead ends: 69 [2022-04-06 15:06:28,792 INFO L226 Difference]: Without dead ends: 63 [2022-04-06 15:06:28,793 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 27.7s TimeCoverageRelationStatistics Valid=374, Invalid=2810, Unknown=8, NotChecked=0, Total=3192 [2022-04-06 15:06:28,793 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 69 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-06 15:06:28,793 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 93 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 550 Invalid, 0 Unknown, 17 Unchecked, 1.5s Time] [2022-04-06 15:06:28,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-04-06 15:06:28,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 56. [2022-04-06 15:06:28,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 46 states have internal predecessors, (49), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 15:06:28,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2022-04-06 15:06:28,808 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 41 [2022-04-06 15:06:28,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:06:28,809 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2022-04-06 15:06:28,809 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:06:28,809 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2022-04-06 15:06:28,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 15:06:28,809 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:06:28,809 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:06:28,832 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-04-06 15:06:29,023 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-06 15:06:29,024 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:06:29,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:06:29,024 INFO L85 PathProgramCache]: Analyzing trace with hash 701132987, now seen corresponding path program 7 times [2022-04-06 15:06:29,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:06:29,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1465485956] [2022-04-06 15:06:29,181 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 15:06:29,182 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:06:29,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1807145241, now seen corresponding path program 1 times [2022-04-06 15:06:29,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:06:29,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577197684] [2022-04-06 15:06:29,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:06:29,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:06:29,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:29,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:06:29,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:29,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 15:06:29,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:29,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 15:06:29,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:30,395 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 15:06:30,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:06:30,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577197684] [2022-04-06 15:06:30,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577197684] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:06:30,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000143377] [2022-04-06 15:06:30,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:06:30,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:06:30,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:06:30,397 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 15:06:30,398 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 15:06:30,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:06:30,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 15:06:30,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:06:31,655 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 15:06:31,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:06:36,591 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 15:06:36,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000143377] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:06:36,592 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 15:06:36,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 35 [2022-04-06 15:07:24,531 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:07:24,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1465485956] [2022-04-06 15:07:24,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1465485956] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:07:24,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:07:24,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 15:07:24,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967303892] [2022-04-06 15:07:24,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:07:24,532 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 15:07:24,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:07:24,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 15:07:24,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1620, Unknown=18, NotChecked=0, Total=1892 [2022-04-06 15:07:24,533 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand has 24 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:07:33,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:07:33,008 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2022-04-06 15:07:33,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 15:07:33,009 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2022-04-06 15:07:33,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:07:33,010 INFO L225 Difference]: With dead ends: 68 [2022-04-06 15:07:33,010 INFO L226 Difference]: Without dead ends: 58 [2022-04-06 15:07:33,011 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 59.2s TimeCoverageRelationStatistics Valid=364, Invalid=2696, Unknown=20, NotChecked=0, Total=3080 [2022-04-06 15:07:33,011 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 52 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 15:07:33,011 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 88 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 379 Invalid, 0 Unknown, 132 Unchecked, 1.0s Time] [2022-04-06 15:07:33,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-04-06 15:07:33,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2022-04-06 15:07:33,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 46 states have internal predecessors, (48), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 15:07:33,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2022-04-06 15:07:33,028 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 41 [2022-04-06 15:07:33,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:07:33,028 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2022-04-06 15:07:33,028 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:07:33,029 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2022-04-06 15:07:33,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 15:07:33,029 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:07:33,029 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:07:33,051 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-04-06 15:07:33,251 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-04-06 15:07:33,252 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:07:33,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:07:33,252 INFO L85 PathProgramCache]: Analyzing trace with hash -557464543, now seen corresponding path program 8 times [2022-04-06 15:07:33,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:07:33,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1748342467] [2022-04-06 15:07:33,420 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 15:07:33,420 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:07:33,421 INFO L85 PathProgramCache]: Analyzing trace with hash 325712299, now seen corresponding path program 1 times [2022-04-06 15:07:33,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:07:33,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098081310] [2022-04-06 15:07:33,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:07:33,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:07:33,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:07:33,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:07:33,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:07:33,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 15:07:33,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:07:33,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 15:07:33,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:07:34,849 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 15:07:34,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:07:34,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098081310] [2022-04-06 15:07:34,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098081310] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:07:34,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859828779] [2022-04-06 15:07:34,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:07:34,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:07:34,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:07:34,851 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 15:07:34,852 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 15:07:34,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:07:34,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 29 conjunts are in the unsatisfiable core [2022-04-06 15:07:34,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:07:36,205 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 15:07:36,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:07:42,293 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 15:07:42,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859828779] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:07:42,293 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 15:07:42,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 39 [2022-04-06 15:08:07,838 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:08:07,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1748342467] [2022-04-06 15:08:07,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1748342467] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:08:07,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:08:07,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 15:08:07,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749225760] [2022-04-06 15:08:07,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:08:07,839 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 15:08:07,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:08:07,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 15:08:07,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=1791, Unknown=9, NotChecked=0, Total=2070 [2022-04-06 15:08:07,840 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 24 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:08:15,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:08:15,098 INFO L93 Difference]: Finished difference Result 71 states and 76 transitions. [2022-04-06 15:08:15,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 15:08:15,098 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2022-04-06 15:08:15,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:08:15,099 INFO L225 Difference]: With dead ends: 71 [2022-04-06 15:08:15,099 INFO L226 Difference]: Without dead ends: 65 [2022-04-06 15:08:15,100 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1115 ImplicationChecksByTransitivity, 34.0s TimeCoverageRelationStatistics Valid=400, Invalid=3130, Unknown=10, NotChecked=0, Total=3540 [2022-04-06 15:08:15,100 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 77 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-06 15:08:15,101 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 93 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 538 Invalid, 0 Unknown, 104 Unchecked, 1.5s Time] [2022-04-06 15:08:15,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-04-06 15:08:15,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2022-04-06 15:08:15,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 46 states have (on average 1.108695652173913) internal successors, (51), 48 states have internal predecessors, (51), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 15:08:15,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2022-04-06 15:08:15,119 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 43 [2022-04-06 15:08:15,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:08:15,119 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2022-04-06 15:08:15,120 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:08:15,120 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2022-04-06 15:08:15,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 15:08:15,120 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:08:15,120 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:08:15,138 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-04-06 15:08:15,331 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,SelfDestructingSolverStorable15 [2022-04-06 15:08:15,331 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:08:15,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:08:15,332 INFO L85 PathProgramCache]: Analyzing trace with hash 2025675069, now seen corresponding path program 9 times [2022-04-06 15:08:15,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:08:15,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1053812274] [2022-04-06 15:08:15,444 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 15:08:15,444 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:08:15,445 INFO L85 PathProgramCache]: Analyzing trace with hash -430344983, now seen corresponding path program 1 times [2022-04-06 15:08:15,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:08:15,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653470636] [2022-04-06 15:08:15,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:08:15,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:08:15,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:08:15,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:08:15,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:08:15,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 15:08:15,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:08:15,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 15:08:15,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:08:16,701 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 15:08:16,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:08:16,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653470636] [2022-04-06 15:08:16,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653470636] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:08:16,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125022690] [2022-04-06 15:08:16,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:08:16,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:08:16,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:08:16,705 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 15:08:16,705 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 15:08:16,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:08:16,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 15:08:16,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:08:17,953 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 15:08:17,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:08:23,629 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 15:08:23,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125022690] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:08:23,629 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 15:08:23,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 37 [2022-04-06 15:09:11,981 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:09:11,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1053812274] [2022-04-06 15:09:11,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1053812274] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:09:11,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:09:11,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 15:09:11,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297475821] [2022-04-06 15:09:11,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:09:11,982 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 15:09:11,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:09:11,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 15:09:11,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=1782, Unknown=18, NotChecked=0, Total=2070 [2022-04-06 15:09:11,983 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand has 25 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:09:18,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:09:18,545 INFO L93 Difference]: Finished difference Result 70 states and 74 transitions. [2022-04-06 15:09:18,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 15:09:18,546 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2022-04-06 15:09:18,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:09:18,546 INFO L225 Difference]: With dead ends: 70 [2022-04-06 15:09:18,546 INFO L226 Difference]: Without dead ends: 60 [2022-04-06 15:09:18,547 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1096 ImplicationChecksByTransitivity, 55.8s TimeCoverageRelationStatistics Valid=390, Invalid=3012, Unknown=20, NotChecked=0, Total=3422 [2022-04-06 15:09:18,548 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 62 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 15:09:18,548 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 79 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 330 Invalid, 0 Unknown, 143 Unchecked, 0.9s Time] [2022-04-06 15:09:18,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-04-06 15:09:18,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2022-04-06 15:09:18,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 48 states have internal predecessors, (50), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 15:09:18,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2022-04-06 15:09:18,568 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 43 [2022-04-06 15:09:18,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:09:18,568 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2022-04-06 15:09:18,568 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:09:18,568 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2022-04-06 15:09:18,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 15:09:18,569 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:09:18,569 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:09:18,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 15:09:18,771 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,SelfDestructingSolverStorable16 [2022-04-06 15:09:18,772 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:09:18,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:09:18,772 INFO L85 PathProgramCache]: Analyzing trace with hash -600741085, now seen corresponding path program 10 times [2022-04-06 15:09:18,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:09:18,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1392925509] [2022-04-06 15:09:18,895 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 15:09:18,895 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:09:18,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1685874349, now seen corresponding path program 1 times [2022-04-06 15:09:18,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:09:18,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750277109] [2022-04-06 15:09:18,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:09:18,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:09:18,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:09:19,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:09:19,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:09:19,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 15:09:19,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:09:19,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 15:09:19,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:09:20,516 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 15:09:20,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:09:20,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750277109] [2022-04-06 15:09:20,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750277109] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:09:20,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066832854] [2022-04-06 15:09:20,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:09:20,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:09:20,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:09:20,517 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 15:09:20,518 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 15:09:20,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:09:20,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-06 15:09:20,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:09:22,004 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 15:09:22,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:09:28,643 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 15:09:28,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066832854] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:09:28,643 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 15:09:28,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 41 [2022-04-06 15:09:56,226 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:09:56,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1392925509] [2022-04-06 15:09:56,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1392925509] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:09:56,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:09:56,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 15:09:56,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634727365] [2022-04-06 15:09:56,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:09:56,227 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 15:09:56,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:09:56,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 15:09:56,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=1961, Unknown=9, NotChecked=0, Total=2256 [2022-04-06 15:09:56,228 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand has 25 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:10:03,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:10:03,529 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2022-04-06 15:10:03,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 15:10:03,530 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2022-04-06 15:10:03,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:10:03,531 INFO L225 Difference]: With dead ends: 73 [2022-04-06 15:10:03,531 INFO L226 Difference]: Without dead ends: 67 [2022-04-06 15:10:03,532 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 36.9s TimeCoverageRelationStatistics Valid=426, Invalid=3470, Unknown=10, NotChecked=0, Total=3906 [2022-04-06 15:10:03,532 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 72 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 15:10:03,532 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 85 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 491 Invalid, 0 Unknown, 119 Unchecked, 1.3s Time] [2022-04-06 15:10:03,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-04-06 15:10:03,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 60. [2022-04-06 15:10:03,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 50 states have internal predecessors, (53), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 15:10:03,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2022-04-06 15:10:03,554 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 45 [2022-04-06 15:10:03,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:10:03,555 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2022-04-06 15:10:03,555 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:10:03,555 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2022-04-06 15:10:03,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 15:10:03,555 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:10:03,555 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:10:03,578 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 15:10:03,771 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,SelfDestructingSolverStorable17 [2022-04-06 15:10:03,772 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:10:03,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:10:03,772 INFO L85 PathProgramCache]: Analyzing trace with hash -694671041, now seen corresponding path program 11 times [2022-04-06 15:10:03,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:10:03,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1025216494] [2022-04-06 15:10:03,943 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 15:10:03,943 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:10:03,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1040176533, now seen corresponding path program 1 times [2022-04-06 15:10:03,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:10:03,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516514387] [2022-04-06 15:10:03,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:10:03,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:10:03,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:10:04,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:10:04,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:10:04,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 15:10:04,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:10:04,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 15:10:04,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:10:05,406 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 15:10:05,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:10:05,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516514387] [2022-04-06 15:10:05,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516514387] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:10:05,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371642763] [2022-04-06 15:10:05,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:10:05,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:10:05,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:10:05,408 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 15:10:05,408 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 15:10:05,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:10:05,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 29 conjunts are in the unsatisfiable core [2022-04-06 15:10:05,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:10:06,793 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 15:10:06,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:10:12,110 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 15:10:12,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371642763] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:10:12,111 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 15:10:12,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 39 [2022-04-06 15:11:04,331 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:11:04,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1025216494] [2022-04-06 15:11:04,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1025216494] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:11:04,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:11:04,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 15:11:04,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286030456] [2022-04-06 15:11:04,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:11:04,332 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 15:11:04,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:11:04,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 15:11:04,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=1949, Unknown=21, NotChecked=0, Total=2256 [2022-04-06 15:11:04,333 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:11:13,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:11:13,404 INFO L93 Difference]: Finished difference Result 72 states and 76 transitions. [2022-04-06 15:11:13,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 15:11:13,404 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2022-04-06 15:11:13,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:11:13,405 INFO L225 Difference]: With dead ends: 72 [2022-04-06 15:11:13,405 INFO L226 Difference]: Without dead ends: 62 [2022-04-06 15:11:13,406 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1206 ImplicationChecksByTransitivity, 62.7s TimeCoverageRelationStatistics Valid=416, Invalid=3343, Unknown=23, NotChecked=0, Total=3782 [2022-04-06 15:11:13,406 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 59 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 15:11:13,407 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 86 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 445 Invalid, 0 Unknown, 67 Unchecked, 1.3s Time] [2022-04-06 15:11:13,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-04-06 15:11:13,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2022-04-06 15:11:13,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 50 states have internal predecessors, (52), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 15:11:13,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2022-04-06 15:11:13,422 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 45 [2022-04-06 15:11:13,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:11:13,422 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2022-04-06 15:11:13,422 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:11:13,423 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2022-04-06 15:11:13,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 15:11:13,423 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:11:13,423 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:11:13,439 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 15:11:13,623 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:11:13,624 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:11:13,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:11:13,624 INFO L85 PathProgramCache]: Analyzing trace with hash 760175013, now seen corresponding path program 12 times [2022-04-06 15:11:13,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:11:13,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1288737348] [2022-04-06 15:11:13,787 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 15:11:13,787 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:11:13,788 INFO L85 PathProgramCache]: Analyzing trace with hash 992574255, now seen corresponding path program 1 times [2022-04-06 15:11:13,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:11:13,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823196507] [2022-04-06 15:11:13,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:11:13,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:11:13,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:11:13,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:11:13,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:11:13,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 15:11:13,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:11:14,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 15:11:14,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:11:15,427 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 15:11:15,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:11:15,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823196507] [2022-04-06 15:11:15,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823196507] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:11:15,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713695946] [2022-04-06 15:11:15,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:11:15,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:11:15,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:11:15,429 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 15:11:15,430 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 15:11:15,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:11:15,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 33 conjunts are in the unsatisfiable core [2022-04-06 15:11:15,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:11:16,882 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 15:11:16,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:11:23,160 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 15:11:23,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713695946] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:11:23,160 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 15:11:23,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 43 [2022-04-06 15:11:46,624 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:11:46,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1288737348] [2022-04-06 15:11:46,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1288737348] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:11:46,625 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:11:46,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 15:11:46,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174048258] [2022-04-06 15:11:46,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:11:46,625 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 15:11:46,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:11:46,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 15:11:46,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=2141, Unknown=7, NotChecked=0, Total=2450 [2022-04-06 15:11:46,626 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 26 states, 24 states have (on average 1.625) internal successors, (39), 24 states have internal predecessors, (39), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:11:54,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:11:54,597 INFO L93 Difference]: Finished difference Result 75 states and 80 transitions. [2022-04-06 15:11:54,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 15:11:54,598 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 1.625) internal successors, (39), 24 states have internal predecessors, (39), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2022-04-06 15:11:54,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:11:54,599 INFO L225 Difference]: With dead ends: 75 [2022-04-06 15:11:54,599 INFO L226 Difference]: Without dead ends: 69 [2022-04-06 15:11:54,600 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 72 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1340 ImplicationChecksByTransitivity, 33.1s TimeCoverageRelationStatistics Valid=452, Invalid=3830, Unknown=8, NotChecked=0, Total=4290 [2022-04-06 15:11:54,600 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 75 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 170 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-04-06 15:11:54,600 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 116 Invalid, 859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 660 Invalid, 0 Unknown, 170 Unchecked, 1.8s Time] [2022-04-06 15:11:54,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-04-06 15:11:54,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2022-04-06 15:11:54,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 50 states have (on average 1.1) internal successors, (55), 52 states have internal predecessors, (55), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 15:11:54,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2022-04-06 15:11:54,618 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 47 [2022-04-06 15:11:54,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:11:54,618 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2022-04-06 15:11:54,618 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 1.625) internal successors, (39), 24 states have internal predecessors, (39), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:11:54,618 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2022-04-06 15:11:54,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 15:11:54,619 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:11:54,619 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:11:54,634 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-04-06 15:11:54,819 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:11:54,819 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:11:54,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:11:54,820 INFO L85 PathProgramCache]: Analyzing trace with hash 687800513, now seen corresponding path program 13 times [2022-04-06 15:11:54,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:11:54,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1134346324] [2022-04-06 15:11:54,984 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 15:11:54,984 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:11:54,985 INFO L85 PathProgramCache]: Analyzing trace with hash -968267923, now seen corresponding path program 1 times [2022-04-06 15:11:54,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:11:54,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762463954] [2022-04-06 15:11:54,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:11:54,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:11:55,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:11:55,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:11:55,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:11:55,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 15:11:55,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:11:55,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 15:11:55,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:11:56,571 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 15:11:56,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:11:56,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762463954] [2022-04-06 15:11:56,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762463954] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:11:56,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173514420] [2022-04-06 15:11:56,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:11:56,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:11:56,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:11:56,572 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 15:11:56,573 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 15:11:56,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:11:56,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-06 15:11:56,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:11:57,946 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 15:11:57,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:12:04,144 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 15:12:04,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173514420] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:12:04,145 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 15:12:04,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 41 [2022-04-06 15:12:57,378 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:12:57,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1134346324] [2022-04-06 15:12:57,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1134346324] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:12:57,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:12:57,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 15:12:57,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611915176] [2022-04-06 15:12:57,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:12:57,379 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 15:12:57,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:12:57,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 15:12:57,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=2126, Unknown=21, NotChecked=0, Total=2450 [2022-04-06 15:12:57,379 INFO L87 Difference]: Start difference. First operand 62 states and 67 transitions. Second operand has 27 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:13:07,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:13:07,061 INFO L93 Difference]: Finished difference Result 74 states and 78 transitions. [2022-04-06 15:13:07,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 15:13:07,062 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2022-04-06 15:13:07,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:13:07,062 INFO L225 Difference]: With dead ends: 74 [2022-04-06 15:13:07,062 INFO L226 Difference]: Without dead ends: 64 [2022-04-06 15:13:07,063 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1322 ImplicationChecksByTransitivity, 64.4s TimeCoverageRelationStatistics Valid=443, Invalid=3694, Unknown=23, NotChecked=0, Total=4160 [2022-04-06 15:13:07,064 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 60 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-04-06 15:13:07,064 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 118 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 636 Invalid, 0 Unknown, 156 Unchecked, 1.7s Time] [2022-04-06 15:13:07,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-04-06 15:13:07,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2022-04-06 15:13:07,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 50 states have (on average 1.08) internal successors, (54), 52 states have internal predecessors, (54), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 15:13:07,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2022-04-06 15:13:07,089 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 47 [2022-04-06 15:13:07,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:13:07,089 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2022-04-06 15:13:07,089 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:13:07,089 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2022-04-06 15:13:07,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 15:13:07,090 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:13:07,090 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:13:07,108 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-04-06 15:13:07,299 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:13:07,299 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:13:07,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:13:07,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1364480089, now seen corresponding path program 14 times [2022-04-06 15:13:07,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:13:07,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [69688372] [2022-04-06 15:13:07,415 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 15:13:07,415 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:13:07,416 INFO L85 PathProgramCache]: Analyzing trace with hash -2106763471, now seen corresponding path program 1 times [2022-04-06 15:13:07,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:13:07,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983453309] [2022-04-06 15:13:07,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:13:07,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:13:07,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:13:07,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:13:07,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:13:07,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 15:13:07,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:13:07,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 15:13:07,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:13:09,116 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 15:13:09,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:13:09,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983453309] [2022-04-06 15:13:09,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983453309] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:13:09,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827828866] [2022-04-06 15:13:09,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:13:09,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:13:09,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:13:09,118 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 15:13:09,119 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 15:13:09,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:13:09,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 15:13:09,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:13:10,590 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 15:13:10,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:13:19,107 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 15:13:19,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827828866] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:13:19,108 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 15:13:19,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 45 [2022-04-06 15:13:42,822 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:13:42,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [69688372] [2022-04-06 15:13:42,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [69688372] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:13:42,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:13:42,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 15:13:42,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129899492] [2022-04-06 15:13:42,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:13:42,823 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 15:13:42,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:13:42,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 15:13:42,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=2326, Unknown=8, NotChecked=0, Total=2652 [2022-04-06 15:13:42,824 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand has 27 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:13:51,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:13:51,181 INFO L93 Difference]: Finished difference Result 77 states and 82 transitions. [2022-04-06 15:13:51,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 15:13:51,182 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 49 [2022-04-06 15:13:51,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:13:51,183 INFO L225 Difference]: With dead ends: 77 [2022-04-06 15:13:51,183 INFO L226 Difference]: Without dead ends: 71 [2022-04-06 15:13:51,184 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 75 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1456 ImplicationChecksByTransitivity, 33.7s TimeCoverageRelationStatistics Valid=478, Invalid=4205, Unknown=9, NotChecked=0, Total=4692 [2022-04-06 15:13:51,184 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 80 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-04-06 15:13:51,185 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 93 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 707 Invalid, 0 Unknown, 78 Unchecked, 1.9s Time] [2022-04-06 15:13:51,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-04-06 15:13:51,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 64. [2022-04-06 15:13:51,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 52 states have (on average 1.0961538461538463) internal successors, (57), 54 states have internal predecessors, (57), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 15:13:51,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 69 transitions. [2022-04-06 15:13:51,207 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 69 transitions. Word has length 49 [2022-04-06 15:13:51,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:13:51,207 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 69 transitions. [2022-04-06 15:13:51,207 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:13:51,207 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 69 transitions. [2022-04-06 15:13:51,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 15:13:51,207 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:13:51,207 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:13:51,223 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 15:13:51,408 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,SelfDestructingSolverStorable21 [2022-04-06 15:13:51,408 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:13:51,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:13:51,408 INFO L85 PathProgramCache]: Analyzing trace with hash 2098069443, now seen corresponding path program 15 times [2022-04-06 15:13:51,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:13:51,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1925994021] [2022-04-06 15:13:51,574 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 15:13:51,574 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:13:51,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1572424687, now seen corresponding path program 1 times [2022-04-06 15:13:51,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:13:51,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721321903] [2022-04-06 15:13:51,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:13:51,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:13:51,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:13:51,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:13:51,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:13:51,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 15:13:51,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:13:52,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 15:13:52,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:13:53,216 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 15:13:53,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:13:53,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721321903] [2022-04-06 15:13:53,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721321903] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:13:53,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047473516] [2022-04-06 15:13:53,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:13:53,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:13:53,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:13:53,218 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 15:13:53,219 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 15:13:53,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:13:53,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 33 conjunts are in the unsatisfiable core [2022-04-06 15:13:53,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:13:54,707 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 15:13:54,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:14:01,068 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 15:14:01,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047473516] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:14:01,068 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 15:14:01,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 43 [2022-04-06 15:14:53,590 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:14:53,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1925994021] [2022-04-06 15:14:53,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1925994021] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:14:53,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:14:53,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 15:14:53,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640071482] [2022-04-06 15:14:53,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:14:53,591 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 15:14:53,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:14:53,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 15:14:53,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=2314, Unknown=20, NotChecked=0, Total=2652 [2022-04-06 15:14:53,592 INFO L87 Difference]: Start difference. First operand 64 states and 69 transitions. Second operand has 28 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:15:03,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:15:03,722 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2022-04-06 15:15:03,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 15:15:03,722 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 49 [2022-04-06 15:15:03,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:15:03,723 INFO L225 Difference]: With dead ends: 76 [2022-04-06 15:15:03,723 INFO L226 Difference]: Without dead ends: 66 [2022-04-06 15:15:03,724 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 72 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1443 ImplicationChecksByTransitivity, 64.3s TimeCoverageRelationStatistics Valid=468, Invalid=4066, Unknown=22, NotChecked=0, Total=4556 [2022-04-06 15:15:03,724 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 61 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-04-06 15:15:03,724 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 130 Invalid, 850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 717 Invalid, 0 Unknown, 107 Unchecked, 2.0s Time] [2022-04-06 15:15:03,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-04-06 15:15:03,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2022-04-06 15:15:03,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 54 states have internal predecessors, (56), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 15:15:03,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2022-04-06 15:15:03,748 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 49 [2022-04-06 15:15:03,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:15:03,748 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2022-04-06 15:15:03,748 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:15:03,748 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2022-04-06 15:15:03,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 15:15:03,748 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:15:03,749 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:15:03,766 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 15:15:03,949 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:15:03,949 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:15:03,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:15:03,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1246399785, now seen corresponding path program 16 times [2022-04-06 15:15:03,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:15:03,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [798827742] [2022-04-06 15:15:04,063 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 15:15:04,064 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:15:04,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1262740813, now seen corresponding path program 1 times [2022-04-06 15:15:04,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:15:04,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981113712] [2022-04-06 15:15:04,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:15:04,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:15:04,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:15:04,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:15:04,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:15:04,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 15:15:04,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:15:04,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 15:15:04,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:15:06,056 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 15:15:06,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:15:06,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981113712] [2022-04-06 15:15:06,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981113712] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:15:06,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147691706] [2022-04-06 15:15:06,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:15:06,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:15:06,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:15:06,061 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 15:15:06,062 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 15:15:06,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:15:06,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 15:15:06,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:15:07,707 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 15:15:07,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:15:19,594 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 15:15:19,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147691706] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:15:19,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 15:15:19,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 47 [2022-04-06 15:15:49,186 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:15:49,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [798827742] [2022-04-06 15:15:49,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [798827742] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:15:49,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:15:49,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 15:15:49,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331940338] [2022-04-06 15:15:49,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:15:49,187 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 15:15:49,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:15:49,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 15:15:49,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=2517, Unknown=11, NotChecked=0, Total=2862 [2022-04-06 15:15:49,187 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand has 28 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:15:58,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:15:58,197 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2022-04-06 15:15:58,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 15:15:58,198 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2022-04-06 15:15:58,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:15:58,199 INFO L225 Difference]: With dead ends: 79 [2022-04-06 15:15:58,199 INFO L226 Difference]: Without dead ends: 73 [2022-04-06 15:15:58,200 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 78 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1578 ImplicationChecksByTransitivity, 43.9s TimeCoverageRelationStatistics Valid=504, Invalid=4596, Unknown=12, NotChecked=0, Total=5112 [2022-04-06 15:15:58,200 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 81 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-04-06 15:15:58,200 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 88 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 792 Invalid, 0 Unknown, 20 Unchecked, 2.1s Time] [2022-04-06 15:15:58,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-04-06 15:15:58,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 66. [2022-04-06 15:15:58,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 54 states have (on average 1.0925925925925926) internal successors, (59), 56 states have internal predecessors, (59), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 15:15:58,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2022-04-06 15:15:58,230 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 51 [2022-04-06 15:15:58,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:15:58,230 INFO L478 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2022-04-06 15:15:58,230 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:15:58,230 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2022-04-06 15:15:58,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 15:15:58,231 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:15:58,231 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:15:58,255 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 15:15:58,455 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:15:58,455 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:15:58,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:15:58,456 INFO L85 PathProgramCache]: Analyzing trace with hash 156845637, now seen corresponding path program 17 times [2022-04-06 15:15:58,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:15:58,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [866927265] [2022-04-06 15:15:58,569 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 15:15:58,569 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:15:58,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1078720497, now seen corresponding path program 1 times [2022-04-06 15:15:58,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:15:58,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496976060] [2022-04-06 15:15:58,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:15:58,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:15:58,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:15:58,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:15:58,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:15:58,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 15:15:58,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:15:59,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 15:15:59,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:16:00,400 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 15:16:00,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:16:00,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496976060] [2022-04-06 15:16:00,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496976060] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:16:00,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764029928] [2022-04-06 15:16:00,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:16:00,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:16:00,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:16:00,401 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 15:16:00,404 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 15:16:00,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:16:00,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 15:16:00,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:16:01,942 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 15:16:01,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:16:10,478 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 15:16:10,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764029928] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:16:10,478 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 15:16:10,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 45 [2022-04-06 15:16:59,554 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:16:59,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [866927265] [2022-04-06 15:16:59,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [866927265] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:16:59,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:16:59,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-04-06 15:16:59,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457078579] [2022-04-06 15:16:59,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:16:59,554 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 15:16:59,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:16:59,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 15:16:59,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=336, Invalid=2508, Unknown=18, NotChecked=0, Total=2862 [2022-04-06 15:16:59,555 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand has 29 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:17:08,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:17:08,313 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2022-04-06 15:17:08,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 15:17:08,314 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2022-04-06 15:17:08,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:17:08,314 INFO L225 Difference]: With dead ends: 78 [2022-04-06 15:17:08,314 INFO L226 Difference]: Without dead ends: 68 [2022-04-06 15:17:08,315 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 75 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1569 ImplicationChecksByTransitivity, 59.7s TimeCoverageRelationStatistics Valid=496, Invalid=4454, Unknown=20, NotChecked=0, Total=4970 [2022-04-06 15:17:08,316 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 61 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-04-06 15:17:08,316 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 107 Invalid, 818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 672 Invalid, 0 Unknown, 118 Unchecked, 2.0s Time] [2022-04-06 15:17:08,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-04-06 15:17:08,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2022-04-06 15:17:08,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 56 states have internal predecessors, (58), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 15:17:08,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2022-04-06 15:17:08,340 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 51 [2022-04-06 15:17:08,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:17:08,340 INFO L478 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2022-04-06 15:17:08,340 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:17:08,340 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2022-04-06 15:17:08,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 15:17:08,341 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:17:08,341 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:17:08,357 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-04-06 15:17:08,541 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:17:08,542 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:17:08,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:17:08,542 INFO L85 PathProgramCache]: Analyzing trace with hash 2041057835, now seen corresponding path program 18 times [2022-04-06 15:17:08,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:17:08,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1106322177] [2022-04-06 15:17:08,687 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 15:17:08,688 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:17:08,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1577182645, now seen corresponding path program 1 times [2022-04-06 15:17:08,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:17:08,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276276070] [2022-04-06 15:17:08,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:17:08,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:17:08,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:17:08,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:17:08,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:17:08,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 15:17:08,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:17:09,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 15:17:09,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:17:10,990 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 15:17:10,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:17:10,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276276070] [2022-04-06 15:17:10,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276276070] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:17:10,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044645603] [2022-04-06 15:17:10,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:17:10,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:17:10,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:17:10,992 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 15:17:10,992 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 15:17:11,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:17:11,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 15:17:11,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:17:12,788 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 15:17:12,788 INFO L328 TraceCheckSpWp]: Computing backward predicates...