/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/nla-digbench-scaling/sqrt1-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 17:02:22,520 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 17:02:22,522 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 17:02:22,557 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 17:02:22,596 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 17:02:22,597 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 17:02:22,600 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 17:02:22,601 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-20 17:02:22,612 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 17:02:22,612 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 17:02:22,613 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 17:02:22,613 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 17:02:22,613 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 17:02:22,613 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 17:02:22,613 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 17:02:22,613 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 17:02:22,613 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 17:02:22,614 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 17:02:22,614 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 17:02:22,614 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 17:02:22,614 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 17:02:22,614 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 17:02:22,615 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 17:02:22,615 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 17:02:22,615 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 17:02:22,615 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 17:02:22,615 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 17:02:22,615 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 17:02:22,615 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 17:02:22,615 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 17:02:22,615 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 17:02:22,615 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 17:02:22,615 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-20 17:02:22,615 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 17:02:22,787 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 17:02:22,815 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 17:02:22,817 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 17:02:22,817 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 17:02:22,818 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 17:02:22,819 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound10.c [2022-03-20 17:02:22,880 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f56cf25e/e9da632bc33643a88777935aa06b4946/FLAGf081785ec [2022-03-20 17:02:23,219 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 17:02:23,219 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound10.c [2022-03-20 17:02:23,224 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f56cf25e/e9da632bc33643a88777935aa06b4946/FLAGf081785ec [2022-03-20 17:02:23,238 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f56cf25e/e9da632bc33643a88777935aa06b4946 [2022-03-20 17:02:23,240 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 17:02:23,242 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 17:02:23,244 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 17:02:23,244 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 17:02:23,248 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 17:02:23,249 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 05:02:23" (1/1) ... [2022-03-20 17:02:23,249 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ffde0e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:02:23, skipping insertion in model container [2022-03-20 17:02:23,250 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 05:02:23" (1/1) ... [2022-03-20 17:02:23,254 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 17:02:23,265 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 17:02:23,426 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound10.c[520,533] [2022-03-20 17:02:23,442 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 17:02:23,448 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 17:02:23,458 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound10.c[520,533] [2022-03-20 17:02:23,471 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 17:02:23,482 INFO L208 MainTranslator]: Completed translation [2022-03-20 17:02:23,482 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:02:23 WrapperNode [2022-03-20 17:02:23,483 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 17:02:23,484 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 17:02:23,485 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 17:02:23,485 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 17:02:23,493 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:02:23" (1/1) ... [2022-03-20 17:02:23,493 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:02:23" (1/1) ... [2022-03-20 17:02:23,500 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:02:23" (1/1) ... [2022-03-20 17:02:23,500 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:02:23" (1/1) ... [2022-03-20 17:02:23,509 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:02:23" (1/1) ... [2022-03-20 17:02:23,513 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:02:23" (1/1) ... [2022-03-20 17:02:23,514 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:02:23" (1/1) ... [2022-03-20 17:02:23,518 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 17:02:23,519 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 17:02:23,519 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 17:02:23,519 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 17:02:23,520 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:02:23" (1/1) ... [2022-03-20 17:02:23,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 17:02:23,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:02:23,553 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 17:02:23,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 17:02:23,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 17:02:23,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 17:02:23,589 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 17:02:23,589 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 17:02:23,590 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 17:02:23,590 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 17:02:23,590 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 17:02:23,590 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 17:02:23,590 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 17:02:23,590 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 17:02:23,590 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 17:02:23,591 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 17:02:23,592 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 17:02:23,592 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 17:02:23,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 17:02:23,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 17:02:23,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 17:02:23,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 17:02:23,592 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 17:02:23,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 17:02:23,636 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 17:02:23,638 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 17:02:23,737 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 17:02:23,741 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 17:02:23,741 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 17:02:23,742 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 05:02:23 BoogieIcfgContainer [2022-03-20 17:02:23,742 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 17:02:23,744 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 17:02:23,744 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 17:02:23,746 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 17:02:23,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 05:02:23" (1/3) ... [2022-03-20 17:02:23,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18a8fd59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 05:02:23, skipping insertion in model container [2022-03-20 17:02:23,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:02:23" (2/3) ... [2022-03-20 17:02:23,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18a8fd59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 05:02:23, skipping insertion in model container [2022-03-20 17:02:23,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 05:02:23" (3/3) ... [2022-03-20 17:02:23,748 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_valuebound10.c [2022-03-20 17:02:23,752 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 17:02:23,752 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 17:02:23,781 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 17:02:23,786 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 17:02:23,786 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 17:02:23,796 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 17:02:23,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 17:02:23,802 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:02:23,802 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:02:23,802 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:02:23,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:02:23,806 INFO L85 PathProgramCache]: Analyzing trace with hash 326851384, now seen corresponding path program 1 times [2022-03-20 17:02:23,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:02:23,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1113964109] [2022-03-20 17:02:23,820 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:02:23,820 INFO L85 PathProgramCache]: Analyzing trace with hash 326851384, now seen corresponding path program 2 times [2022-03-20 17:02:23,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:02:23,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737530132] [2022-03-20 17:02:23,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:02:23,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:02:23,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:02:23,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:02:23,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:02:23,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:02:23,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:02:23,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:02:23,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:02:23,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737530132] [2022-03-20 17:02:23,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737530132] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:02:23,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:02:23,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 17:02:23,949 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:02:23,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1113964109] [2022-03-20 17:02:23,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1113964109] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:02:23,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:02:23,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 17:02:23,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985612355] [2022-03-20 17:02:23,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:02:23,953 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 17:02:23,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:02:23,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 17:02:23,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 17:02:23,974 INFO L87 Difference]: Start difference. First operand has 31 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 17:02:24,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:02:24,028 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2022-03-20 17:02:24,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 17:02:24,041 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-20 17:02:24,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:02:24,051 INFO L225 Difference]: With dead ends: 53 [2022-03-20 17:02:24,051 INFO L226 Difference]: Without dead ends: 26 [2022-03-20 17:02:24,055 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 17:02:24,063 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 17:02:24,065 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 32 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 17:02:24,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-03-20 17:02:24,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-03-20 17:02:24,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 17:02:24,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-03-20 17:02:24,109 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 17 [2022-03-20 17:02:24,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:02:24,109 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-03-20 17:02:24,110 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 17:02:24,110 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-03-20 17:02:24,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 17:02:24,112 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:02:24,112 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:02:24,112 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 17:02:24,113 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:02:24,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:02:24,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1008578050, now seen corresponding path program 1 times [2022-03-20 17:02:24,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:02:24,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1499168803] [2022-03-20 17:02:24,123 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:02:24,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1008578050, now seen corresponding path program 2 times [2022-03-20 17:02:24,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:02:24,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800052451] [2022-03-20 17:02:24,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:02:24,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:02:24,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:02:24,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:02:24,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:02:24,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:02:24,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:02:24,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:02:24,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:02:24,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800052451] [2022-03-20 17:02:24,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800052451] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:02:24,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:02:24,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 17:02:24,284 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:02:24,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1499168803] [2022-03-20 17:02:24,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1499168803] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:02:24,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:02:24,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 17:02:24,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357829933] [2022-03-20 17:02:24,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:02:24,285 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 17:02:24,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:02:24,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 17:02:24,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 17:02:24,286 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 17:02:24,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:02:24,492 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2022-03-20 17:02:24,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 17:02:24,493 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-20 17:02:24,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:02:24,495 INFO L225 Difference]: With dead ends: 40 [2022-03-20 17:02:24,495 INFO L226 Difference]: Without dead ends: 38 [2022-03-20 17:02:24,495 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 17:02:24,496 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 25 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:02:24,496 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 39 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:02:24,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-20 17:02:24,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2022-03-20 17:02:24,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 17:02:24,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2022-03-20 17:02:24,506 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 17 [2022-03-20 17:02:24,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:02:24,506 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2022-03-20 17:02:24,507 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 17:02:24,507 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2022-03-20 17:02:24,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 17:02:24,509 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:02:24,509 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:02:24,509 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 17:02:24,509 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:02:24,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:02:24,510 INFO L85 PathProgramCache]: Analyzing trace with hash -789682422, now seen corresponding path program 1 times [2022-03-20 17:02:24,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:02:24,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [616784299] [2022-03-20 17:02:24,510 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:02:24,511 INFO L85 PathProgramCache]: Analyzing trace with hash -789682422, now seen corresponding path program 2 times [2022-03-20 17:02:24,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:02:24,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014822233] [2022-03-20 17:02:24,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:02:24,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:02:24,524 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 17:02:24,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2046916380] [2022-03-20 17:02:24,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:02:24,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:02:24,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:02:24,530 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:02:24,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 17:02:24,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:02:24,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:02:24,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 17:02:24,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:02:24,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:02:24,664 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 17:02:24,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:02:24,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014822233] [2022-03-20 17:02:24,665 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 17:02:24,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046916380] [2022-03-20 17:02:24,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046916380] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:02:24,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:02:24,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 17:02:24,666 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:02:24,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [616784299] [2022-03-20 17:02:24,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [616784299] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:02:24,668 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:02:24,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 17:02:24,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267761830] [2022-03-20 17:02:24,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:02:24,668 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 17:02:24,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:02:24,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 17:02:24,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 17:02:24,669 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 17:02:24,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:02:24,724 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2022-03-20 17:02:24,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 17:02:24,724 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-03-20 17:02:24,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:02:24,725 INFO L225 Difference]: With dead ends: 44 [2022-03-20 17:02:24,725 INFO L226 Difference]: Without dead ends: 42 [2022-03-20 17:02:24,726 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 17:02:24,727 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 6 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 17:02:24,727 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 115 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 17:02:24,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-03-20 17:02:24,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2022-03-20 17:02:24,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 23 states have internal predecessors, (24), 14 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 17:02:24,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2022-03-20 17:02:24,735 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 22 [2022-03-20 17:02:24,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:02:24,736 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2022-03-20 17:02:24,736 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 17:02:24,736 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2022-03-20 17:02:24,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-20 17:02:24,736 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:02:24,737 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:02:24,758 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-20 17:02:24,956 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:02:24,957 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:02:24,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:02:24,957 INFO L85 PathProgramCache]: Analyzing trace with hash 2087529154, now seen corresponding path program 1 times [2022-03-20 17:02:24,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:02:24,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1336097095] [2022-03-20 17:02:24,958 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:02:24,958 INFO L85 PathProgramCache]: Analyzing trace with hash 2087529154, now seen corresponding path program 2 times [2022-03-20 17:02:24,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:02:24,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42740251] [2022-03-20 17:02:24,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:02:24,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:02:24,966 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 17:02:24,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1418899713] [2022-03-20 17:02:24,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:02:24,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:02:24,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:02:24,968 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:02:24,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 17:02:25,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:02:25,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:02:25,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 17:02:25,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:02:25,097 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 17:02:25,097 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 17:02:25,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:02:25,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42740251] [2022-03-20 17:02:25,098 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 17:02:25,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418899713] [2022-03-20 17:02:25,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418899713] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:02:25,098 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:02:25,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 17:02:25,099 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:02:25,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1336097095] [2022-03-20 17:02:25,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1336097095] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:02:25,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:02:25,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 17:02:25,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237689669] [2022-03-20 17:02:25,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:02:25,100 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 17:02:25,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:02:25,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 17:02:25,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 17:02:25,100 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 17:02:25,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:02:25,134 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2022-03-20 17:02:25,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 17:02:25,135 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2022-03-20 17:02:25,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:02:25,136 INFO L225 Difference]: With dead ends: 48 [2022-03-20 17:02:25,136 INFO L226 Difference]: Without dead ends: 43 [2022-03-20 17:02:25,136 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 17:02:25,137 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 6 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 17:02:25,137 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 118 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 17:02:25,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-20 17:02:25,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-03-20 17:02:25,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 17:02:25,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2022-03-20 17:02:25,145 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 27 [2022-03-20 17:02:25,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:02:25,145 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2022-03-20 17:02:25,145 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 17:02:25,145 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2022-03-20 17:02:25,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-20 17:02:25,146 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:02:25,146 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:02:25,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 17:02:25,356 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,SelfDestructingSolverStorable3 [2022-03-20 17:02:25,356 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:02:25,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:02:25,357 INFO L85 PathProgramCache]: Analyzing trace with hash -2092280728, now seen corresponding path program 1 times [2022-03-20 17:02:25,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:02:25,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [233413392] [2022-03-20 17:02:27,485 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 3=1}}, 0 SequentialAcceleration, 1 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 17:02:27,486 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:02:27,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1589942244, now seen corresponding path program 1 times [2022-03-20 17:02:27,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:02:27,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983205388] [2022-03-20 17:02:27,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:02:27,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:02:27,495 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 17:02:27,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1031470205] [2022-03-20 17:02:27,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:02:27,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:02:27,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:02:27,497 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:02:27,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 17:02:27,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:02:27,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-20 17:02:27,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:02:32,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:02:32,000 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 17:02:32,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:02:32,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983205388] [2022-03-20 17:02:32,000 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 17:02:32,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031470205] [2022-03-20 17:02:32,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031470205] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:02:32,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:02:32,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 17:03:09,783 WARN L232 SmtUtils]: Spent 6.04s on a formula simplification. DAG size of input: 27 DAG size of output: 22 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 17:03:09,900 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:03:09,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [233413392] [2022-03-20 17:03:09,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [233413392] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:03:09,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:03:09,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 17:03:09,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347855348] [2022-03-20 17:03:09,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:03:09,901 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 17:03:09,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:03:09,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 17:03:09,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=299, Unknown=12, NotChecked=0, Total=380 [2022-03-20 17:03:09,902 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 18 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 11 states have internal predecessors, (22), 5 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 17:03:12,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:03:12,835 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2022-03-20 17:03:12,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 17:03:12,836 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 11 states have internal predecessors, (22), 5 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 34 [2022-03-20 17:03:12,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:03:12,837 INFO L225 Difference]: With dead ends: 59 [2022-03-20 17:03:12,837 INFO L226 Difference]: Without dead ends: 54 [2022-03-20 17:03:12,837 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 44.4s TimeCoverageRelationStatistics Valid=85, Invalid=365, Unknown=12, NotChecked=0, Total=462 [2022-03-20 17:03:12,840 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 12 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 17:03:12,840 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 227 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 19 Invalid, 0 Unknown, 72 Unchecked, 0.0s Time] [2022-03-20 17:03:12,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-20 17:03:12,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-03-20 17:03:12,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 33 states have (on average 1.121212121212121) internal successors, (37), 34 states have internal predecessors, (37), 11 states have call successors, (11), 10 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 17:03:12,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2022-03-20 17:03:12,853 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 34 [2022-03-20 17:03:12,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:03:12,853 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2022-03-20 17:03:12,853 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 11 states have internal predecessors, (22), 5 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 17:03:12,853 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2022-03-20 17:03:12,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-20 17:03:12,854 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:03:12,854 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:03:12,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 17:03:13,074 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:03:13,074 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:03:13,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:03:13,074 INFO L85 PathProgramCache]: Analyzing trace with hash 398970980, now seen corresponding path program 2 times [2022-03-20 17:03:13,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:03:13,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1033152489] [2022-03-20 17:03:14,304 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 3=1}}, 0 SequentialAcceleration, 1 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 17:03:14,305 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:03:14,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1173408528, now seen corresponding path program 1 times [2022-03-20 17:03:14,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:03:14,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434079384] [2022-03-20 17:03:14,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:03:14,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:03:14,312 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 17:03:14,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [601173255] [2022-03-20 17:03:14,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:03:14,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:03:14,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:03:14,314 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:03:14,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 17:03:14,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:03:14,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-20 17:03:14,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:03:30,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:03:30,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:03:30,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:03:30,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:03:30,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434079384] [2022-03-20 17:03:30,818 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 17:03:30,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601173255] [2022-03-20 17:03:30,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601173255] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:03:30,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 17:03:30,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 15 [2022-03-20 17:04:16,973 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:04:16,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1033152489] [2022-03-20 17:04:16,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1033152489] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:04:16,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:04:16,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-20 17:04:16,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184751570] [2022-03-20 17:04:16,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:04:16,974 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 17:04:16,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:04:16,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 17:04:16,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=665, Unknown=13, NotChecked=0, Total=812 [2022-03-20 17:04:16,975 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 24 states, 20 states have (on average 1.25) internal successors, (25), 15 states have internal predecessors, (25), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-20 17:04:23,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:04:23,954 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2022-03-20 17:04:23,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 17:04:23,954 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 1.25) internal successors, (25), 15 states have internal predecessors, (25), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 39 [2022-03-20 17:04:23,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:04:23,955 INFO L225 Difference]: With dead ends: 57 [2022-03-20 17:04:23,955 INFO L226 Difference]: Without dead ends: 55 [2022-03-20 17:04:23,956 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 36 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 52.6s TimeCoverageRelationStatistics Valid=177, Invalid=931, Unknown=14, NotChecked=0, Total=1122 [2022-03-20 17:04:23,958 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 25 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 17:04:23,958 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 240 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 67 Invalid, 0 Unknown, 113 Unchecked, 0.2s Time] [2022-03-20 17:04:23,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-20 17:04:23,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2022-03-20 17:04:23,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 34 states have internal predecessors, (36), 11 states have call successors, (11), 10 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 17:04:23,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2022-03-20 17:04:23,971 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 39 [2022-03-20 17:04:23,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:04:23,972 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2022-03-20 17:04:23,972 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 1.25) internal successors, (25), 15 states have internal predecessors, (25), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-20 17:04:23,972 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2022-03-20 17:04:23,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-20 17:04:23,973 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:04:23,973 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:04:23,978 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-20 17:04:24,177 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:04:24,177 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:04:24,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:04:24,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1537313192, now seen corresponding path program 3 times [2022-03-20 17:04:24,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:04:24,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1652233479] [2022-03-20 17:04:31,560 WARN L232 SmtUtils]: Spent 7.31s on a formula simplification. DAG size of input: 118 DAG size of output: 111 (called from [L 564] de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.jordan.JordanLoopAcceleration.buildAccelerationFormula) [2022-03-20 17:04:31,562 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 3=1}}, 0 SequentialAcceleration, 1 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 17:04:31,562 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:04:31,563 INFO L85 PathProgramCache]: Analyzing trace with hash 404335836, now seen corresponding path program 1 times [2022-03-20 17:04:31,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:04:31,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878344910] [2022-03-20 17:04:31,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:04:31,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:04:31,570 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 17:04:31,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [488486407] [2022-03-20 17:04:31,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:04:31,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:04:31,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:04:31,574 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:04:31,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 17:04:31,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:04:31,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 17:04:31,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:04:46,277 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 17:04:46,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:04:48,720 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 17:04:48,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:04:48,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878344910] [2022-03-20 17:04:48,720 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 17:04:48,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488486407] [2022-03-20 17:04:48,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488486407] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:04:48,721 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 17:04:48,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 15 [2022-03-20 17:05:32,708 WARN L232 SmtUtils]: Spent 6.21s on a formula simplification. DAG size of input: 27 DAG size of output: 22 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 17:05:35,407 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:05:35,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1652233479] [2022-03-20 17:05:35,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1652233479] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:05:35,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:05:35,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-20 17:05:35,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546076548] [2022-03-20 17:05:35,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:05:35,408 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 17:05:35,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:05:35,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 17:05:35,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=666, Unknown=13, NotChecked=0, Total=812 [2022-03-20 17:05:35,409 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand has 24 states, 20 states have (on average 1.25) internal successors, (25), 15 states have internal predecessors, (25), 6 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2022-03-20 17:05:41,961 WARN L232 SmtUtils]: Spent 6.10s on a formula simplification. DAG size of input: 24 DAG size of output: 19 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 17:05:42,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:05:42,700 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2022-03-20 17:05:42,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 17:05:42,701 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 1.25) internal successors, (25), 15 states have internal predecessors, (25), 6 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) Word has length 44 [2022-03-20 17:05:42,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:05:42,702 INFO L225 Difference]: With dead ends: 57 [2022-03-20 17:05:42,702 INFO L226 Difference]: Without dead ends: 55 [2022-03-20 17:05:42,702 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 45 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 55.4s TimeCoverageRelationStatistics Valid=177, Invalid=932, Unknown=13, NotChecked=0, Total=1122 [2022-03-20 17:05:42,703 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 18 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 17:05:42,703 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 233 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 56 Invalid, 0 Unknown, 86 Unchecked, 0.2s Time] [2022-03-20 17:05:42,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-20 17:05:42,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2022-03-20 17:05:42,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 34 states have internal predecessors, (35), 11 states have call successors, (11), 10 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 17:05:42,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2022-03-20 17:05:42,746 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 44 [2022-03-20 17:05:42,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:05:42,759 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2022-03-20 17:05:42,759 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 1.25) internal successors, (25), 15 states have internal predecessors, (25), 6 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2022-03-20 17:05:42,760 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2022-03-20 17:05:42,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-20 17:05:42,765 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:05:42,765 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:05:42,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 17:05:42,966 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:05:42,966 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:05:42,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:05:42,967 INFO L85 PathProgramCache]: Analyzing trace with hash -985423115, now seen corresponding path program 1 times [2022-03-20 17:05:42,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:05:42,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [140243453] [2022-03-20 17:05:47,621 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 3=1}}, 0 SequentialAcceleration, 1 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 17:05:47,622 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:05:47,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1495863447, now seen corresponding path program 1 times [2022-03-20 17:05:47,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:05:47,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710992415] [2022-03-20 17:05:47,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:05:47,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:05:47,628 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 17:05:47,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [806374167] [2022-03-20 17:05:47,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:05:47,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:05:47,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:05:47,630 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:05:47,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 17:05:47,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:05:47,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 17:05:47,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:05:47,882 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-20 17:05:47,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:05:48,171 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-20 17:05:48,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:05:48,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710992415] [2022-03-20 17:05:48,172 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 17:05:48,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806374167] [2022-03-20 17:05:48,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806374167] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:05:48,172 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 17:05:48,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2022-03-20 17:06:27,406 WARN L232 SmtUtils]: Spent 6.14s on a formula simplification. DAG size of input: 27 DAG size of output: 22 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 17:06:27,748 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:06:27,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [140243453] [2022-03-20 17:06:27,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [140243453] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:06:27,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:06:27,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 17:06:27,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557175463] [2022-03-20 17:06:27,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:06:27,749 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 17:06:27,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:06:27,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 17:06:27,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=316, Unknown=13, NotChecked=0, Total=420 [2022-03-20 17:06:27,750 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 13 states have internal predecessors, (29), 3 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-20 17:06:28,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:06:28,550 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2022-03-20 17:06:28,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 17:06:28,551 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 13 states have internal predecessors, (29), 3 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 50 [2022-03-20 17:06:28,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:06:28,551 INFO L225 Difference]: With dead ends: 58 [2022-03-20 17:06:28,551 INFO L226 Difference]: Without dead ends: 56 [2022-03-20 17:06:28,552 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 40.0s TimeCoverageRelationStatistics Valid=103, Invalid=390, Unknown=13, NotChecked=0, Total=506 [2022-03-20 17:06:28,552 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 24 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 17:06:28,552 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 156 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 92 Invalid, 0 Unknown, 24 Unchecked, 0.5s Time] [2022-03-20 17:06:28,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-20 17:06:28,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-03-20 17:06:28,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 states have internal predecessors, (37), 11 states have call successors, (11), 11 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 17:06:28,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2022-03-20 17:06:28,569 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 50 [2022-03-20 17:06:28,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:06:28,569 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2022-03-20 17:06:28,569 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 13 states have internal predecessors, (29), 3 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-20 17:06:28,570 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2022-03-20 17:06:28,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-20 17:06:28,570 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:06:28,570 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:06:28,590 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-20 17:06:28,787 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:06:28,788 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:06:28,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:06:28,788 INFO L85 PathProgramCache]: Analyzing trace with hash 878827831, now seen corresponding path program 1 times [2022-03-20 17:06:28,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:06:28,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2044113374] [2022-03-20 17:06:31,065 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 3=1}}, 0 SequentialAcceleration, 1 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 17:06:31,066 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:06:31,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1128594691, now seen corresponding path program 1 times [2022-03-20 17:06:31,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:06:31,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134696793] [2022-03-20 17:06:31,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:06:31,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:06:31,072 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 17:06:31,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [666704382] [2022-03-20 17:06:31,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:06:31,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:06:31,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:06:31,084 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:06:31,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 17:06:31,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:06:31,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 17:06:31,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:06:31,379 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 17:06:31,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:06:31,692 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 17:06:31,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:06:31,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134696793] [2022-03-20 17:06:31,692 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 17:06:31,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666704382] [2022-03-20 17:06:31,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666704382] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:06:31,692 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 17:06:31,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2022-03-20 17:07:09,228 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:07:09,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2044113374] [2022-03-20 17:07:09,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2044113374] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:07:09,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:07:09,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 17:07:09,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245406175] [2022-03-20 17:07:09,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:07:09,229 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 17:07:09,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:07:09,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 17:07:09,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=316, Unknown=13, NotChecked=0, Total=420 [2022-03-20 17:07:09,230 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 13 states have internal predecessors, (29), 3 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-20 17:07:23,818 WARN L232 SmtUtils]: Spent 10.12s on a formula simplification. DAG size of input: 23 DAG size of output: 19 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 17:07:26,025 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 17:07:28,369 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 17:07:28,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:07:28,452 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2022-03-20 17:07:28,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 17:07:28,453 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 13 states have internal predecessors, (29), 3 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 55 [2022-03-20 17:07:28,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:07:28,453 INFO L225 Difference]: With dead ends: 56 [2022-03-20 17:07:28,453 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 17:07:28,454 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 80 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 52.4s TimeCoverageRelationStatistics Valid=125, Invalid=510, Unknown=15, NotChecked=0, Total=650 [2022-03-20 17:07:28,454 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 21 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 23 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-03-20 17:07:28,454 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 232 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 125 Invalid, 2 Unknown, 24 Unchecked, 4.5s Time] [2022-03-20 17:07:28,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 17:07:28,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 17:07:28,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-20 17:07:28,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 17:07:28,455 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 55 [2022-03-20 17:07:28,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:07:28,455 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 17:07:28,455 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 13 states have internal predecessors, (29), 3 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-20 17:07:28,455 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 17:07:28,455 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 17:07:28,458 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 17:07:28,475 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-20 17:07:28,658 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:07:28,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-20 17:07:35,966 WARN L232 SmtUtils]: Spent 6.40s on a formula simplification. DAG size of input: 451 DAG size of output: 3 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-20 17:11:18,709 WARN L232 SmtUtils]: Spent 3.71m on a formula simplification. DAG size of input: 580 DAG size of output: 289 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-20 17:11:25,339 WARN L232 SmtUtils]: Spent 6.63s on a formula simplification. DAG size of input: 451 DAG size of output: 3 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-20 17:14:56,964 WARN L230 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2022-03-20 17:14:56,965 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:61) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.getRedundancy(SimplifyDDA.java:625) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getRedundancy(SimplifyDDAWithTimeout.java:120) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA$Simplifier.walk(SimplifyDDA.java:370) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.simplifyOnce(SimplifyDDA.java:649) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getSimplifiedTerm(SimplifyDDAWithTimeout.java:184) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:197) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplifyWithStatistics(SmtUtils.java:264) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplifyWithStatistics(SmtUtils.java:256) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter(HoareAnnotationComposer.java:149) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.(HoareAnnotationComposer.java:105) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeIcfgHoareAnnotation(BasicCegarLoop.java:1164) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop$CegarLoopResultBuilder.getResult(AbstractCegarLoop.java:856) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:351) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:331) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:414) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:264) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:177) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:156) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1465) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:239) ... 39 more [2022-03-20 17:14:56,974 INFO L158 Benchmark]: Toolchain (without parser) took 753731.75ms. Allocated memory was 251.7MB in the beginning and 361.8MB in the end (delta: 110.1MB). Free memory was 193.4MB in the beginning and 131.3MB in the end (delta: 62.1MB). Peak memory consumption was 181.9MB. Max. memory is 8.0GB. [2022-03-20 17:14:56,974 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 251.7MB. Free memory was 209.6MB in the beginning and 209.4MB in the end (delta: 136.3kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 17:14:56,974 INFO L158 Benchmark]: CACSL2BoogieTranslator took 238.71ms. Allocated memory was 251.7MB in the beginning and 361.8MB in the end (delta: 110.1MB). Free memory was 193.2MB in the beginning and 329.5MB in the end (delta: -136.3MB). Peak memory consumption was 10.9MB. Max. memory is 8.0GB. [2022-03-20 17:14:56,974 INFO L158 Benchmark]: Boogie Preprocessor took 33.91ms. Allocated memory is still 361.8MB. Free memory was 329.5MB in the beginning and 328.5MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 17:14:56,975 INFO L158 Benchmark]: RCFGBuilder took 223.55ms. Allocated memory is still 361.8MB. Free memory was 328.5MB in the beginning and 316.4MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-03-20 17:14:56,975 INFO L158 Benchmark]: TraceAbstraction took 753229.70ms. Allocated memory is still 361.8MB. Free memory was 315.9MB in the beginning and 131.3MB in the end (delta: 184.6MB). Peak memory consumption was 196.1MB. Max. memory is 8.0GB. [2022-03-20 17:14:56,976 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### [2022-03-20 17:14:56,976 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 101 --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 251.7MB. Free memory was 209.6MB in the beginning and 209.4MB in the end (delta: 136.3kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 238.71ms. Allocated memory was 251.7MB in the beginning and 361.8MB in the end (delta: 110.1MB). Free memory was 193.2MB in the beginning and 329.5MB in the end (delta: -136.3MB). Peak memory consumption was 10.9MB. Max. memory is 8.0GB. * Boogie Preprocessor took 33.91ms. Allocated memory is still 361.8MB. Free memory was 329.5MB in the beginning and 328.5MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 223.55ms. Allocated memory is still 361.8MB. Free memory was 328.5MB in the beginning and 316.4MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * TraceAbstraction took 753229.70ms. Allocated memory is still 361.8MB. Free memory was 315.9MB in the beginning and 131.3MB in the end (delta: 184.6MB). Peak memory consumption was 196.1MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...