/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/divbin_valuebound10.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 16:15:09,361 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 16:15:09,363 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 16:15:09,397 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 16:15:09,405 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 16:15:09,410 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 16:15:09,411 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 16:15:09,414 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 16:15:09,415 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 16:15:09,416 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 16:15:09,422 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 16:15:09,426 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 16:15:09,427 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 16:15:09,428 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 16:15:09,428 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 16:15:09,431 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 16:15:09,431 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 16:15:09,433 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 16:15:09,437 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 16:15:09,438 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 16:15:09,441 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 16:15:09,442 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-04-06 16:15:09,451 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 16:15:09,451 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 16:15:09,452 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 16:15:09,452 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 16:15:09,452 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 16:15:09,453 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 16:15:09,453 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 16:15:09,453 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 16:15:09,453 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 16:15:09,453 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 16:15:09,453 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 16:15:09,453 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 16:15:09,453 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 16:15:09,453 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 16:15:09,454 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 16:15:09,454 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 16:15:09,454 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 16:15:09,454 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 16:15:09,454 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 16:15:09,454 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 16:15:09,454 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 16:15:09,454 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 16:15:09,454 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 16:15:09,455 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 16:15:09,455 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-04-06 16:15:09,455 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 16:15:09,612 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 16:15:09,628 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 16:15:09,629 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 16:15:09,630 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 16:15:09,631 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 16:15:09,631 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin_valuebound10.i [2022-04-06 16:15:09,696 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c97cdfa96/0aabe8725ad64c28b583528daff3b1cb/FLAG9f0990ec6 [2022-04-06 16:15:10,077 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 16:15:10,078 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin_valuebound10.i [2022-04-06 16:15:10,082 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c97cdfa96/0aabe8725ad64c28b583528daff3b1cb/FLAG9f0990ec6 [2022-04-06 16:15:10,090 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c97cdfa96/0aabe8725ad64c28b583528daff3b1cb [2022-04-06 16:15:10,092 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 16:15:10,093 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 16:15:10,095 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 16:15:10,095 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 16:15:10,097 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 16:15:10,098 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 04:15:10" (1/1) ... [2022-04-06 16:15:10,098 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ec047f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:15:10, skipping insertion in model container [2022-04-06 16:15:10,099 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 04:15:10" (1/1) ... [2022-04-06 16:15:10,104 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 16:15:10,118 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 16:15:10,235 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin_valuebound10.i[950,963] [2022-04-06 16:15:10,244 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 16:15:10,253 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 16:15:10,264 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin_valuebound10.i[950,963] [2022-04-06 16:15:10,268 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 16:15:10,276 INFO L208 MainTranslator]: Completed translation [2022-04-06 16:15:10,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:15:10 WrapperNode [2022-04-06 16:15:10,277 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 16:15:10,278 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 16:15:10,278 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 16:15:10,278 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 16:15:10,284 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:15:10" (1/1) ... [2022-04-06 16:15:10,285 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:15:10" (1/1) ... [2022-04-06 16:15:10,290 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:15:10" (1/1) ... [2022-04-06 16:15:10,291 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:15:10" (1/1) ... [2022-04-06 16:15:10,300 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:15:10" (1/1) ... [2022-04-06 16:15:10,303 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:15:10" (1/1) ... [2022-04-06 16:15:10,304 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:15:10" (1/1) ... [2022-04-06 16:15:10,305 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 16:15:10,305 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 16:15:10,306 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 16:15:10,306 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 16:15:10,307 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:15:10" (1/1) ... [2022-04-06 16:15:10,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 16:15:10,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:15:10,328 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 16:15:10,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 16:15:10,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 16:15:10,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 16:15:10,351 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 16:15:10,351 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 16:15:10,351 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 16:15:10,351 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 16:15:10,351 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 16:15:10,351 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 16:15:10,352 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-04-06 16:15:10,352 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-04-06 16:15:10,352 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 16:15:10,352 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 16:15:10,352 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-04-06 16:15:10,352 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 16:15:10,352 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 16:15:10,353 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 16:15:10,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 16:15:10,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 16:15:10,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 16:15:10,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 16:15:10,353 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 16:15:10,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 16:15:10,396 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 16:15:10,397 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 16:15:10,491 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 16:15:10,495 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 16:15:10,495 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-06 16:15:10,496 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 04:15:10 BoogieIcfgContainer [2022-04-06 16:15:10,496 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 16:15:10,516 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 16:15:10,516 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 16:15:10,520 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 16:15:10,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 04:15:10" (1/3) ... [2022-04-06 16:15:10,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15fbc50a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 04:15:10, skipping insertion in model container [2022-04-06 16:15:10,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:15:10" (2/3) ... [2022-04-06 16:15:10,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15fbc50a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 04:15:10, skipping insertion in model container [2022-04-06 16:15:10,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 04:15:10" (3/3) ... [2022-04-06 16:15:10,522 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_valuebound10.i [2022-04-06 16:15:10,526 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 16:15:10,526 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 16:15:10,582 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 16:15:10,587 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 16:15:10,588 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 16:15:10,597 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 16:15:10,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 16:15:10,603 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:15:10,607 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:15:10,607 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:15:10,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:15:10,612 INFO L85 PathProgramCache]: Analyzing trace with hash 291922115, now seen corresponding path program 1 times [2022-04-06 16:15:10,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:15:10,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [768196813] [2022-04-06 16:15:10,626 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:15:10,627 INFO L85 PathProgramCache]: Analyzing trace with hash 291922115, now seen corresponding path program 2 times [2022-04-06 16:15:10,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:15:10,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364699361] [2022-04-06 16:15:10,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:15:10,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:15:10,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:15:10,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 16:15:10,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:15:10,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 16:15:10,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:15:10,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 16:15:10,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:15:10,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 16:15:10,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:15:10,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-06 16:15:10,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:15:10,814 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 16:15:10,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:15:10,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364699361] [2022-04-06 16:15:10,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364699361] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:15:10,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:15:10,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 16:15:10,817 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:15:10,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [768196813] [2022-04-06 16:15:10,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [768196813] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:15:10,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:15:10,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 16:15:10,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016616943] [2022-04-06 16:15:10,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:15:10,826 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 16:15:10,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:15:10,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 16:15:10,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 16:15:10,849 INFO L87 Difference]: Start difference. First operand has 34 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 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 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 16:15:10,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:15:10,902 INFO L93 Difference]: Finished difference Result 61 states and 90 transitions. [2022-04-06 16:15:10,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 16:15:10,905 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2022-04-06 16:15:10,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:15:10,910 INFO L225 Difference]: With dead ends: 61 [2022-04-06 16:15:10,910 INFO L226 Difference]: Without dead ends: 29 [2022-04-06 16:15:10,913 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 16:15:10,915 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 37 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 [2022-04-06 16:15:10,916 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 37 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:15:10,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-04-06 16:15:10,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-04-06 16:15:10,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 16:15:10,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2022-04-06 16:15:10,949 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 34 [2022-04-06 16:15:10,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:15:10,949 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2022-04-06 16:15:10,949 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 16:15:10,950 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2022-04-06 16:15:10,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-06 16:15:10,951 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:15:10,951 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:15:10,951 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 16:15:10,951 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:15:10,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:15:10,952 INFO L85 PathProgramCache]: Analyzing trace with hash -245963777, now seen corresponding path program 1 times [2022-04-06 16:15:10,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:15:10,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [859469402] [2022-04-06 16:15:10,953 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:15:10,953 INFO L85 PathProgramCache]: Analyzing trace with hash -245963777, now seen corresponding path program 2 times [2022-04-06 16:15:10,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:15:10,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947773359] [2022-04-06 16:15:10,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:15:10,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:15:10,972 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:15:10,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1456205049] [2022-04-06 16:15:10,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:15:10,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:15:10,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:15:10,974 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:15:10,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 16:15:11,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-06 16:15:11,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:15:11,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 16:15:11,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:15:11,203 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 16:15:11,203 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 16:15:11,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:15:11,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947773359] [2022-04-06 16:15:11,203 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:15:11,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456205049] [2022-04-06 16:15:11,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456205049] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:15:11,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:15:11,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:15:11,204 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:15:11,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [859469402] [2022-04-06 16:15:11,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [859469402] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:15:11,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:15:11,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:15:11,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070484554] [2022-04-06 16:15:11,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:15:11,205 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 16:15:11,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:15:11,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 16:15:11,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 16:15:11,206 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-06 16:15:11,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:15:11,268 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2022-04-06 16:15:11,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 16:15:11,268 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 35 [2022-04-06 16:15:11,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:15:11,269 INFO L225 Difference]: With dead ends: 40 [2022-04-06 16:15:11,269 INFO L226 Difference]: Without dead ends: 37 [2022-04-06 16:15:11,270 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 16:15:11,270 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 8 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:15:11,271 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 102 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:15:11,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-04-06 16:15:11,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-04-06 16:15:11,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 16:15:11,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2022-04-06 16:15:11,285 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 35 [2022-04-06 16:15:11,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:15:11,286 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2022-04-06 16:15:11,287 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-06 16:15:11,287 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2022-04-06 16:15:11,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 16:15:11,287 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:15:11,288 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:15:11,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 16:15:11,488 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:15:11,489 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:15:11,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:15:11,489 INFO L85 PathProgramCache]: Analyzing trace with hash -382866049, now seen corresponding path program 1 times [2022-04-06 16:15:11,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:15:11,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1251801703] [2022-04-06 16:15:11,490 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:15:11,490 INFO L85 PathProgramCache]: Analyzing trace with hash -382866049, now seen corresponding path program 2 times [2022-04-06 16:15:11,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:15:11,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380730614] [2022-04-06 16:15:11,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:15:11,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:15:11,517 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:15:11,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [456582150] [2022-04-06 16:15:11,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:15:11,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:15:11,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:15:11,518 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:15:11,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 16:15:11,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:15:11,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:15:11,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 3 conjunts are in the unsatisfiable core [2022-04-06 16:15:11,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:15:11,617 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 16:15:11,617 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 16:15:11,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:15:11,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380730614] [2022-04-06 16:15:11,618 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:15:11,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456582150] [2022-04-06 16:15:11,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456582150] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:15:11,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:15:11,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 16:15:11,618 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:15:11,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1251801703] [2022-04-06 16:15:11,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1251801703] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:15:11,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:15:11,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 16:15:11,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294354285] [2022-04-06 16:15:11,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:15:11,619 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 16:15:11,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:15:11,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 16:15:11,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 16:15:11,620 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 16:15:11,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:15:11,648 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2022-04-06 16:15:11,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 16:15:11,648 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2022-04-06 16:15:11,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:15:11,650 INFO L225 Difference]: With dead ends: 61 [2022-04-06 16:15:11,650 INFO L226 Difference]: Without dead ends: 39 [2022-04-06 16:15:11,650 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 16:15:11,651 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:15:11,652 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 55 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:15:11,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-04-06 16:15:11,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-04-06 16:15:11,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.2) internal successors, (30), 26 states have internal predecessors, (30), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 16:15:11,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2022-04-06 16:15:11,660 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 43 [2022-04-06 16:15:11,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:15:11,660 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2022-04-06 16:15:11,660 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 16:15:11,660 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2022-04-06 16:15:11,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 16:15:11,661 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:15:11,661 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:15:11,679 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-04-06 16:15:11,867 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,SelfDestructingSolverStorable2 [2022-04-06 16:15:11,868 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:15:11,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:15:11,868 INFO L85 PathProgramCache]: Analyzing trace with hash 866494938, now seen corresponding path program 1 times [2022-04-06 16:15:11,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:15:11,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [10133227] [2022-04-06 16:15:11,869 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:15:11,869 INFO L85 PathProgramCache]: Analyzing trace with hash 866494938, now seen corresponding path program 2 times [2022-04-06 16:15:11,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:15:11,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769085037] [2022-04-06 16:15:11,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:15:11,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:15:11,886 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:15:11,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [116965344] [2022-04-06 16:15:11,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:15:11,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:15:11,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:15:11,891 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:15:11,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process