/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/sqrt1-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 03:23:58,510 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 03:23:58,511 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 03:23:58,543 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 03:23:58,558 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-19 03:23:58,559 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-19 03:23:58,562 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-19 03:23:58,564 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-19 03:23:58,565 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-19 03:23:58,565 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-19 03:23:58,568 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-19 03:23:58,574 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-19 03:23:58,576 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-19 03:23:58,576 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-19 03:23:58,577 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-19 03:23:58,583 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-19 03:23:58,585 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-19 03:23:58,590 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-19 03:23:58,596 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 03:23:58,597 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 03:23:58,598 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 03:23:58,598 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-19 03:23:58,609 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 03:23:58,610 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 03:23:58,610 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 03:23:58,610 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-19 03:23:58,611 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 03:23:58,611 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-19 03:23:58,611 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 03:23:58,611 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 03:23:58,611 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 03:23:58,612 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 03:23:58,612 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-19 03:23:58,612 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 03:23:58,612 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 03:23:58,612 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 03:23:58,612 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 03:23:58,612 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 03:23:58,612 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 03:23:58,612 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 03:23:58,612 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 03:23:58,612 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 03:23:58,613 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 03:23:58,613 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 03:23:58,613 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 03:23:58,613 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 03:23:58,613 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-19 03:23:58,613 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 03:23:58,783 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 03:23:58,801 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 03:23:58,803 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 03:23:58,804 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 03:23:58,805 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 03:23:58,806 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/sqrt1-ll.c [2022-03-19 03:23:58,860 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6bf2061aa/cd092bd6f1344670954e8a5d5cae12e9/FLAG24f17b7f6 [2022-03-19 03:23:59,238 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 03:23:59,238 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/sqrt1-ll.c [2022-03-19 03:23:59,244 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6bf2061aa/cd092bd6f1344670954e8a5d5cae12e9/FLAG24f17b7f6 [2022-03-19 03:23:59,260 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6bf2061aa/cd092bd6f1344670954e8a5d5cae12e9 [2022-03-19 03:23:59,262 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 03:23:59,263 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 03:23:59,266 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 03:23:59,266 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 03:23:59,269 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 03:23:59,269 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 03:23:59" (1/1) ... [2022-03-19 03:23:59,271 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c0365b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:23:59, skipping insertion in model container [2022-03-19 03:23:59,271 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 03:23:59" (1/1) ... [2022-03-19 03:23:59,276 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 03:23:59,290 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 03:23:59,439 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/sqrt1-ll.c[520,533] [2022-03-19 03:23:59,459 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 03:23:59,465 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 03:23:59,473 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/sqrt1-ll.c[520,533] [2022-03-19 03:23:59,477 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 03:23:59,485 INFO L208 MainTranslator]: Completed translation [2022-03-19 03:23:59,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:23:59 WrapperNode [2022-03-19 03:23:59,486 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 03:23:59,487 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 03:23:59,487 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 03:23:59,487 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 03:23:59,494 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:23:59" (1/1) ... [2022-03-19 03:23:59,494 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:23:59" (1/1) ... [2022-03-19 03:23:59,498 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:23:59" (1/1) ... [2022-03-19 03:23:59,499 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:23:59" (1/1) ... [2022-03-19 03:23:59,502 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:23:59" (1/1) ... [2022-03-19 03:23:59,504 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:23:59" (1/1) ... [2022-03-19 03:23:59,505 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:23:59" (1/1) ... [2022-03-19 03:23:59,506 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 03:23:59,507 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 03:23:59,507 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 03:23:59,507 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 03:23:59,508 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:23:59" (1/1) ... [2022-03-19 03:23:59,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 03:23:59,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:23:59,531 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) [2022-03-19 03:23:59,550 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 [2022-03-19 03:23:59,562 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 03:23:59,562 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 03:23:59,563 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 03:23:59,563 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 03:23:59,563 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 03:23:59,563 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 03:23:59,563 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 03:23:59,563 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 03:23:59,564 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 03:23:59,564 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 03:23:59,564 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-19 03:23:59,565 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 03:23:59,566 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 03:23:59,566 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 03:23:59,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 03:23:59,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 03:23:59,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 03:23:59,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 03:23:59,566 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 03:23:59,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 03:23:59,610 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 03:23:59,612 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 03:23:59,744 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 03:23:59,748 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 03:23:59,748 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-19 03:23:59,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 03:23:59 BoogieIcfgContainer [2022-03-19 03:23:59,750 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 03:23:59,751 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 03:23:59,751 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 03:23:59,754 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 03:23:59,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 03:23:59" (1/3) ... [2022-03-19 03:23:59,755 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19bad0a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 03:23:59, skipping insertion in model container [2022-03-19 03:23:59,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:23:59" (2/3) ... [2022-03-19 03:23:59,755 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19bad0a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 03:23:59, skipping insertion in model container [2022-03-19 03:23:59,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 03:23:59" (3/3) ... [2022-03-19 03:23:59,756 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll.c [2022-03-19 03:23:59,759 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 03:23:59,760 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 03:23:59,813 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 03:23:59,818 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 [2022-03-19 03:23:59,818 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 03:23:59,856 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-19 03:23:59,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-19 03:23:59,861 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:23:59,861 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:23:59,862 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:23:59,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:23:59,865 INFO L85 PathProgramCache]: Analyzing trace with hash 515438393, now seen corresponding path program 1 times [2022-03-19 03:23:59,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:23:59,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [623266173] [2022-03-19 03:23:59,892 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:23:59,892 INFO L85 PathProgramCache]: Analyzing trace with hash 515438393, now seen corresponding path program 2 times [2022-03-19 03:23:59,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:23:59,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219372040] [2022-03-19 03:23:59,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:23:59,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:23:59,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:24:00,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 03:24:00,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:24:00,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:24:00,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:24:00,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219372040] [2022-03-19 03:24:00,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219372040] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:24:00,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:24:00,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 03:24:00,066 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:24:00,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [623266173] [2022-03-19 03:24:00,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [623266173] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:24:00,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:24:00,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 03:24:00,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27336954] [2022-03-19 03:24:00,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:24:00,074 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 03:24:00,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:24:00,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 03:24:00,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 03:24:00,100 INFO L87 Difference]: Start difference. First operand has 25 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 03:24:00,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:24:00,173 INFO L93 Difference]: Finished difference Result 44 states and 66 transitions. [2022-03-19 03:24:00,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 03:24:00,175 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-19 03:24:00,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:24:00,181 INFO L225 Difference]: With dead ends: 44 [2022-03-19 03:24:00,181 INFO L226 Difference]: Without dead ends: 20 [2022-03-19 03:24:00,184 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 03:24:00,188 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 11 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 03:24:00,189 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 27 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 03:24:00,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-03-19 03:24:00,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-03-19 03:24:00,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 10 states have internal predecessors, (11), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-19 03:24:00,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2022-03-19 03:24:00,224 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 11 [2022-03-19 03:24:00,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:24:00,225 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2022-03-19 03:24:00,226 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 03:24:00,226 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2022-03-19 03:24:00,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-19 03:24:00,227 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:24:00,227 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:24:00,227 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 03:24:00,228 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:24:00,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:24:00,228 INFO L85 PathProgramCache]: Analyzing trace with hash 517106689, now seen corresponding path program 1 times [2022-03-19 03:24:00,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:24:00,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [183763835] [2022-03-19 03:24:00,229 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:24:00,229 INFO L85 PathProgramCache]: Analyzing trace with hash 517106689, now seen corresponding path program 2 times [2022-03-19 03:24:00,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:24:00,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311230714] [2022-03-19 03:24:00,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:24:00,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:24:00,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:24:00,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 03:24:00,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:24:00,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:24:00,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:24:00,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311230714] [2022-03-19 03:24:00,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311230714] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:24:00,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:24:00,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 03:24:00,334 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:24:00,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [183763835] [2022-03-19 03:24:00,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [183763835] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:24:00,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:24:00,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 03:24:00,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800631987] [2022-03-19 03:24:00,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:24:00,335 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 03:24:00,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:24:00,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 03:24:00,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-19 03:24:00,336 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 03:24:00,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:24:00,514 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2022-03-19 03:24:00,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 03:24:00,515 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-19 03:24:00,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:24:00,517 INFO L225 Difference]: With dead ends: 34 [2022-03-19 03:24:00,519 INFO L226 Difference]: Without dead ends: 32 [2022-03-19 03:24:00,521 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-19 03:24:00,524 INFO L912 BasicCegarLoop]: 17 mSDtfsCounter, 21 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 03:24:00,525 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 34 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 03:24:00,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-19 03:24:00,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2022-03-19 03:24:00,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 16 states have internal predecessors, (17), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 03:24:00,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2022-03-19 03:24:00,553 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 11 [2022-03-19 03:24:00,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:24:00,553 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2022-03-19 03:24:00,553 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 03:24:00,553 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2022-03-19 03:24:00,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-19 03:24:00,554 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:24:00,554 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:24:00,555 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-19 03:24:00,555 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:24:00,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:24:00,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1248765655, now seen corresponding path program 1 times [2022-03-19 03:24:00,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:24:00,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2028015729] [2022-03-19 03:24:00,561 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:24:00,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1248765655, now seen corresponding path program 2 times [2022-03-19 03:24:00,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:24:00,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472453444] [2022-03-19 03:24:00,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:24:00,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:24:00,574 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:24:00,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1828277669] [2022-03-19 03:24:00,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 03:24:00,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:24:00,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:24:00,582 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) [2022-03-19 03:24:00,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 03:24:00,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 03:24:00,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:24:00,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 03:24:00,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:24:00,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:24:00,731 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 03:24:00,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:24:00,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472453444] [2022-03-19 03:24:00,731 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:24:00,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828277669] [2022-03-19 03:24:00,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828277669] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:24:00,732 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:24:00,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 03:24:00,733 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:24:00,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2028015729] [2022-03-19 03:24:00,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2028015729] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:24:00,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:24:00,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 03:24:00,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827516606] [2022-03-19 03:24:00,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:24:00,735 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 03:24:00,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:24:00,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 03:24:00,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 03:24:00,736 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 03:24:00,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:24:00,787 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2022-03-19 03:24:00,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 03:24:00,787 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2022-03-19 03:24:00,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:24:00,788 INFO L225 Difference]: With dead ends: 38 [2022-03-19 03:24:00,788 INFO L226 Difference]: Without dead ends: 36 [2022-03-19 03:24:00,788 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 03:24:00,789 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 6 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 03:24:00,789 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 92 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 03:24:00,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-19 03:24:00,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2022-03-19 03:24:00,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 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) [2022-03-19 03:24:00,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2022-03-19 03:24:00,797 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 16 [2022-03-19 03:24:00,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:24:00,797 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2022-03-19 03:24:00,797 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 03:24:00,798 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2022-03-19 03:24:00,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-19 03:24:00,798 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:24:00,798 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:24:00,817 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-19 03:24:01,003 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 [2022-03-19 03:24:01,004 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:24:01,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:24:01,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1451064513, now seen corresponding path program 1 times [2022-03-19 03:24:01,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:24:01,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [951602537] [2022-03-19 03:24:01,005 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:24:01,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1451064513, now seen corresponding path program 2 times [2022-03-19 03:24:01,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:24:01,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237434971] [2022-03-19 03:24:01,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:24:01,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:24:01,012 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:24:01,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [20970382] [2022-03-19 03:24:01,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 03:24:01,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:24:01,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:24:01,019 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) [2022-03-19 03:24:01,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 03:24:01,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 03:24:01,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:24:01,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 03:24:01,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:24:01,128 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 03:24:01,129 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 03:24:01,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:24:01,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237434971] [2022-03-19 03:24:01,129 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:24:01,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20970382] [2022-03-19 03:24:01,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20970382] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:24:01,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:24:01,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 03:24:01,130 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:24:01,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [951602537] [2022-03-19 03:24:01,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [951602537] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:24:01,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:24:01,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 03:24:01,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324425012] [2022-03-19 03:24:01,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:24:01,131 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 03:24:01,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:24:01,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 03:24:01,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 03:24:01,132 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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) [2022-03-19 03:24:01,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:24:01,159 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2022-03-19 03:24:01,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 03:24:01,160 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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 21 [2022-03-19 03:24:01,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:24:01,161 INFO L225 Difference]: With dead ends: 42 [2022-03-19 03:24:01,161 INFO L226 Difference]: Without dead ends: 37 [2022-03-19 03:24:01,161 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 03:24:01,162 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 6 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 03:24:01,162 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 95 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 03:24:01,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-19 03:24:01,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-03-19 03:24:01,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 20 states have (on average 1.1) internal successors, (22), 21 states have internal predecessors, (22), 11 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-19 03:24:01,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2022-03-19 03:24:01,169 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 21 [2022-03-19 03:24:01,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:24:01,169 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2022-03-19 03:24:01,169 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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) [2022-03-19 03:24:01,169 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2022-03-19 03:24:01,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-19 03:24:01,170 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:24:01,170 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:24:01,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 03:24:01,392 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 [2022-03-19 03:24:01,392 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:24:01,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:24:01,393 INFO L85 PathProgramCache]: Analyzing trace with hash 412610311, now seen corresponding path program 1 times [2022-03-19 03:24:01,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:24:01,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1374289052] [2022-03-19 03:24:03,183 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 [2022-03-19 03:24:03,184 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 03:24:03,186 INFO L85 PathProgramCache]: Analyzing trace with hash 296996863, now seen corresponding path program 1 times [2022-03-19 03:24:03,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:24:03,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294341345] [2022-03-19 03:24:03,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:24:03,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:24:03,192 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:24:03,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [137070277] [2022-03-19 03:24:03,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:24:03,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:24:03,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:24:03,194 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) [2022-03-19 03:24:03,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 03:24:03,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:24:03,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-19 03:24:03,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:24:06,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:24:06,202 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 03:24:06,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:24:06,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294341345] [2022-03-19 03:24:06,203 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:24:06,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137070277] [2022-03-19 03:24:06,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137070277] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:24:06,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:24:06,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 03:24:51,934 WARN L232 SmtUtils]: Spent 6.12s 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) [2022-03-19 03:24:52,216 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:24:52,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1374289052] [2022-03-19 03:24:52,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1374289052] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:24:52,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:24:52,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-19 03:24:52,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806465548] [2022-03-19 03:24:52,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:24:52,219 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 03:24:52,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:24:52,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 03:24:52,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=329, Unknown=14, NotChecked=0, Total=420 [2022-03-19 03:24:52,220 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 18 states, 15 states have (on average 1.2) internal successors, (18), 11 states have internal predecessors, (18), 5 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-19 03:25:08,679 WARN L232 SmtUtils]: Spent 9.72s on a formula simplification. DAG size of input: 103 DAG size of output: 69 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 03:25:16,525 WARN L232 SmtUtils]: Spent 5.16s on a formula simplification. DAG size of input: 87 DAG size of output: 48 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 03:25:16,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:25:16,578 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2022-03-19 03:25:16,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-19 03:25:16,579 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 1.2) internal successors, (18), 11 states have internal predecessors, (18), 5 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 28 [2022-03-19 03:25:16,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:25:16,580 INFO L225 Difference]: With dead ends: 53 [2022-03-19 03:25:16,580 INFO L226 Difference]: Without dead ends: 48 [2022-03-19 03:25:16,580 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 72.2s TimeCoverageRelationStatistics Valid=102, Invalid=435, Unknown=15, NotChecked=0, Total=552 [2022-03-19 03:25:16,581 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 13 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 03:25:16,581 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 149 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 57 Unchecked, 0.1s Time] [2022-03-19 03:25:16,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-19 03:25:16,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-03-19 03:25:16,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-19 03:25:16,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2022-03-19 03:25:16,594 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 28 [2022-03-19 03:25:16,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:25:16,594 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2022-03-19 03:25:16,594 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 1.2) internal successors, (18), 11 states have internal predecessors, (18), 5 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-19 03:25:16,594 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2022-03-19 03:25:16,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-19 03:25:16,595 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:25:16,595 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:25:16,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 03:25:16,795 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 [2022-03-19 03:25:16,796 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:25:16,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:25:16,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1543321117, now seen corresponding path program 2 times [2022-03-19 03:25:16,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:25:16,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1354793718] [2022-03-19 03:25:19,155 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 [2022-03-19 03:25:19,156 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 03:25:19,157 INFO L85 PathProgramCache]: Analyzing trace with hash 450956203, now seen corresponding path program 1 times [2022-03-19 03:25:19,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:25:19,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830177847] [2022-03-19 03:25:19,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:25:19,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:25:19,163 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:25:19,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1947385649] [2022-03-19 03:25:19,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:25:19,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:25:19,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:25:19,164 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) [2022-03-19 03:25:19,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 03:25:19,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:25:19,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-19 03:25:19,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:25:48,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:25:48,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:25:50,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:25:50,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:25:50,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830177847] [2022-03-19 03:25:50,066 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:25:50,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947385649] [2022-03-19 03:25:50,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947385649] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:25:50,066 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:25:50,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-03-19 03:26:34,489 WARN L232 SmtUtils]: Spent 6.12s 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) [2022-03-19 03:26:35,782 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:26:35,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1354793718] [2022-03-19 03:26:35,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1354793718] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:26:35,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:26:35,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-19 03:26:35,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300079478] [2022-03-19 03:26:35,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:26:35,783 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-19 03:26:35,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:26:35,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-19 03:26:35,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=514, Unknown=14, NotChecked=0, Total=650 [2022-03-19 03:26:35,784 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand has 21 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 13 states have internal predecessors, (21), 6 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 03:26:46,000 WARN L232 SmtUtils]: Spent 5.60s on a formula simplification that was a NOOP. DAG size: 138 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 03:26:57,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:26:57,678 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2022-03-19 03:26:57,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 03:26:57,679 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 13 states have internal predecessors, (21), 6 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 33 [2022-03-19 03:26:57,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:26:57,679 INFO L225 Difference]: With dead ends: 50 [2022-03-19 03:26:57,679 INFO L226 Difference]: Without dead ends: 48 [2022-03-19 03:26:57,680 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 77.0s TimeCoverageRelationStatistics Valid=151, Invalid=643, Unknown=18, NotChecked=0, Total=812 [2022-03-19 03:26:57,680 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 6 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 03:26:57,681 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 200 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 44 Unchecked, 0.0s Time] [2022-03-19 03:26:57,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-19 03:26:57,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-03-19 03:26:57,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 29 states have (on average 1.103448275862069) internal successors, (32), 30 states have internal predecessors, (32), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-19 03:26:57,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2022-03-19 03:26:57,704 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 33 [2022-03-19 03:26:57,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:26:57,705 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2022-03-19 03:26:57,705 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 13 states have internal predecessors, (21), 6 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 03:26:57,705 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2022-03-19 03:26:57,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-19 03:26:57,707 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:26:57,707 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:26:57,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 03:26:57,912 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 [2022-03-19 03:26:57,912 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:26:57,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:26:57,912 INFO L85 PathProgramCache]: Analyzing trace with hash 584544327, now seen corresponding path program 3 times [2022-03-19 03:26:57,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:26:57,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2136300902] [2022-03-19 03:27:00,883 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 [2022-03-19 03:27:00,884 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 03:27:00,885 INFO L85 PathProgramCache]: Analyzing trace with hash -35808321, now seen corresponding path program 1 times [2022-03-19 03:27:00,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:27:00,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221909660] [2022-03-19 03:27:00,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:27:00,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:27:00,890 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:27:00,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [743137746] [2022-03-19 03:27:00,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:27:00,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:27:00,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:27:00,892 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) [2022-03-19 03:27:00,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 03:27:00,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:27:00,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-19 03:27:00,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:27:40,266 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 03:27:40,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:27:55,691 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 03:27:55,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:27:55,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221909660] [2022-03-19 03:27:55,691 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:27:55,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743137746] [2022-03-19 03:27:55,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743137746] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:27:55,691 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:27:55,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-03-19 03:28:53,858 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:28:53,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2136300902] [2022-03-19 03:28:53,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2136300902] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:28:53,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:28:53,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-19 03:28:53,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067124876] [2022-03-19 03:28:53,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:28:53,859 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-19 03:28:53,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:28:53,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-19 03:28:53,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=510, Unknown=19, NotChecked=0, Total=650 [2022-03-19 03:28:53,860 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 21 states, 17 states have (on average 1.411764705882353) internal successors, (24), 13 states have internal predecessors, (24), 6 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-19 03:29:07,585 WARN L232 SmtUtils]: Spent 6.17s 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) [2022-03-19 03:29:15,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:29:15,190 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2022-03-19 03:29:15,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-19 03:29:15,190 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 1.411764705882353) internal successors, (24), 13 states have internal predecessors, (24), 6 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) Word has length 38 [2022-03-19 03:29:15,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:29:15,191 INFO L225 Difference]: With dead ends: 52 [2022-03-19 03:29:15,191 INFO L226 Difference]: Without dead ends: 45 [2022-03-19 03:29:15,191 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 36 SyntacticMatches, 7 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 90.8s TimeCoverageRelationStatistics Valid=170, Invalid=739, Unknown=21, NotChecked=0, Total=930 [2022-03-19 03:29:15,192 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 20 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 03:29:15,192 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 136 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 28 Invalid, 0 Unknown, 64 Unchecked, 0.2s Time] [2022-03-19 03:29:15,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-19 03:29:15,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-03-19 03:29:15,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 9 states have call successors, (9), 9 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-19 03:29:15,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2022-03-19 03:29:15,212 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 38 [2022-03-19 03:29:15,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:29:15,212 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2022-03-19 03:29:15,212 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 1.411764705882353) internal successors, (24), 13 states have internal predecessors, (24), 6 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-19 03:29:15,212 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2022-03-19 03:29:15,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-19 03:29:15,213 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:29:15,213 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:29:15,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-19 03:29:15,427 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 [2022-03-19 03:29:15,427 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:29:15,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:29:15,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1040346008, now seen corresponding path program 1 times [2022-03-19 03:29:15,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:29:15,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2139222857] [2022-03-19 03:29:18,714 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 [2022-03-19 03:29:18,715 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 03:29:18,716 INFO L85 PathProgramCache]: Analyzing trace with hash -626688688, now seen corresponding path program 1 times [2022-03-19 03:29:18,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:29:18,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989060567] [2022-03-19 03:29:18,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:29:18,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:29:18,722 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:29:18,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [417464539] [2022-03-19 03:29:18,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:29:18,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:29:18,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:29:18,724 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) [2022-03-19 03:29:18,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 03:29:18,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:29:18,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-19 03:29:18,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:29:19,050 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 03:29:19,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:29:19,413 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 03:29:19,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:29:19,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989060567] [2022-03-19 03:29:19,413 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:29:19,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417464539] [2022-03-19 03:29:19,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417464539] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:29:19,414 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:29:19,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2022-03-19 03:29:59,058 WARN L232 SmtUtils]: Spent 6.17s 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) [2022-03-19 03:29:59,370 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:29:59,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2139222857] [2022-03-19 03:29:59,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2139222857] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:29:59,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:29:59,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-19 03:29:59,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913329278] [2022-03-19 03:29:59,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:29:59,371 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-19 03:29:59,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:29:59,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-19 03:29:59,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=316, Unknown=13, NotChecked=0, Total=420 [2022-03-19 03:29:59,371 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 13 states have internal predecessors, (25), 3 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-19 03:30:14,071 WARN L232 SmtUtils]: Spent 10.14s 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) [2022-03-19 03:30:14,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:30:14,492 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2022-03-19 03:30:14,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 03:30:14,493 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 13 states have internal predecessors, (25), 3 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 44 [2022-03-19 03:30:14,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:30:14,493 INFO L225 Difference]: With dead ends: 45 [2022-03-19 03:30:14,493 INFO L226 Difference]: Without dead ends: 0 [2022-03-19 03:30:14,494 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 54.8s TimeCoverageRelationStatistics Valid=119, Invalid=466, Unknown=15, NotChecked=0, Total=600 [2022-03-19 03:30:14,494 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 17 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 03:30:14,495 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 123 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 85 Invalid, 0 Unknown, 15 Unchecked, 0.4s Time] [2022-03-19 03:30:14,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-19 03:30:14,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-19 03:30:14,495 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) [2022-03-19 03:30:14,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-19 03:30:14,495 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 44 [2022-03-19 03:30:14,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:30:14,495 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-19 03:30:14,495 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 13 states have internal predecessors, (25), 3 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-19 03:30:14,495 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-19 03:30:14,496 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-19 03:30:14,498 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-19 03:30:14,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-19 03:30:14,720 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 [2022-03-19 03:30:14,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-19 03:33:38,013 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") [2022-03-19 03:33:38,014 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:620) 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:1163) 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 [2022-03-19 03:33:38,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2022-03-19 03:33:38,020 INFO L158 Benchmark]: Toolchain (without parser) took 578756.37ms. Allocated memory was 180.4MB in the beginning and 219.2MB in the end (delta: 38.8MB). Free memory was 131.3MB in the beginning and 105.0MB in the end (delta: 26.3MB). Peak memory consumption was 99.3MB. Max. memory is 8.0GB. [2022-03-19 03:33:38,020 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 180.4MB. Free memory was 147.8MB in the beginning and 147.7MB in the end (delta: 136.4kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-19 03:33:38,020 INFO L158 Benchmark]: CACSL2BoogieTranslator took 220.65ms. Allocated memory is still 180.4MB. Free memory was 131.2MB in the beginning and 156.1MB in the end (delta: -25.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-19 03:33:38,020 INFO L158 Benchmark]: Boogie Preprocessor took 19.61ms. Allocated memory is still 180.4MB. Free memory was 156.1MB in the beginning and 154.7MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-19 03:33:38,020 INFO L158 Benchmark]: RCFGBuilder took 242.95ms. Allocated memory is still 180.4MB. Free memory was 154.7MB in the beginning and 144.9MB in the end (delta: 9.8MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-19 03:33:38,021 INFO L158 Benchmark]: TraceAbstraction took 578268.26ms. Allocated memory was 180.4MB in the beginning and 219.2MB in the end (delta: 38.8MB). Free memory was 144.6MB in the beginning and 105.0MB in the end (delta: 39.6MB). Peak memory consumption was 113.5MB. Max. memory is 8.0GB. [2022-03-19 03:33:38,021 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 180.4MB. Free memory was 147.8MB in the beginning and 147.7MB in the end (delta: 136.4kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 220.65ms. Allocated memory is still 180.4MB. Free memory was 131.2MB in the beginning and 156.1MB in the end (delta: -25.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 19.61ms. Allocated memory is still 180.4MB. Free memory was 156.1MB in the beginning and 154.7MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 242.95ms. Allocated memory is still 180.4MB. Free memory was 154.7MB in the beginning and 144.9MB in the end (delta: 9.8MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 578268.26ms. Allocated memory was 180.4MB in the beginning and 219.2MB in the end (delta: 38.8MB). Free memory was 144.6MB in the beginning and 105.0MB in the end (delta: 39.6MB). Peak memory consumption was 113.5MB. 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...