/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/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 06:20:53,305 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 06:20:53,307 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 06:20:53,348 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 06:20:53,363 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 06:20:53,367 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 06:20:53,369 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 06:20:53,371 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 06:20:53,372 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 06:20:53,372 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 06:20:53,374 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 06:20:53,377 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 06:20:53,379 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 06:20:53,380 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 06:20:53,381 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 06:20:53,382 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 06:20:53,383 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 06:20:53,387 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 06:20:53,393 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 06:20:53,394 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 06:20:53,395 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 06:20:53,396 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-20 06:20:53,405 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 06:20:53,406 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 06:20:53,407 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 06:20:53,407 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 06:20:53,407 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 06:20:53,407 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 06:20:53,407 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 06:20:53,407 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 06:20:53,407 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 06:20:53,408 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 06:20:53,408 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 06:20:53,408 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 06:20:53,408 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 06:20:53,408 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 06:20:53,409 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 06:20:53,409 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 06:20:53,409 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 06:20:53,409 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 06:20:53,409 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 06:20:53,409 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 06:20:53,409 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 06:20:53,410 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 06:20:53,410 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 06:20:53,589 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 06:20:53,623 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 06:20:53,625 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 06:20:53,626 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 06:20:53,626 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 06:20:53,627 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound1.c [2022-03-20 06:20:53,678 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e93e3e0e/558a76cff8d6422591c5d7f8ccf4924e/FLAGee035fbde [2022-03-20 06:20:54,032 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 06:20:54,033 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound1.c [2022-03-20 06:20:54,037 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e93e3e0e/558a76cff8d6422591c5d7f8ccf4924e/FLAGee035fbde [2022-03-20 06:20:54,047 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e93e3e0e/558a76cff8d6422591c5d7f8ccf4924e [2022-03-20 06:20:54,049 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 06:20:54,050 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 06:20:54,051 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 06:20:54,051 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 06:20:54,062 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 06:20:54,063 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 06:20:54" (1/1) ... [2022-03-20 06:20:54,064 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@395ad60f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:20:54, skipping insertion in model container [2022-03-20 06:20:54,064 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 06:20:54" (1/1) ... [2022-03-20 06:20:54,068 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 06:20:54,081 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 06:20:54,222 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/hard2_valuebound1.c[526,539] [2022-03-20 06:20:54,256 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 06:20:54,263 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 06:20:54,275 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/hard2_valuebound1.c[526,539] [2022-03-20 06:20:54,289 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 06:20:54,299 INFO L208 MainTranslator]: Completed translation [2022-03-20 06:20:54,308 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:20:54 WrapperNode [2022-03-20 06:20:54,308 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 06:20:54,311 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 06:20:54,311 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 06:20:54,311 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 06:20:54,322 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:20:54" (1/1) ... [2022-03-20 06:20:54,322 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:20:54" (1/1) ... [2022-03-20 06:20:54,328 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:20:54" (1/1) ... [2022-03-20 06:20:54,329 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:20:54" (1/1) ... [2022-03-20 06:20:54,333 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:20:54" (1/1) ... [2022-03-20 06:20:54,336 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:20:54" (1/1) ... [2022-03-20 06:20:54,337 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:20:54" (1/1) ... [2022-03-20 06:20:54,339 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 06:20:54,341 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 06:20:54,341 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 06:20:54,341 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 06:20:54,342 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:20:54" (1/1) ... [2022-03-20 06:20:54,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 06:20:54,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:20:54,373 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 06:20:54,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 06:20:54,406 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 06:20:54,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 06:20:54,410 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 06:20:54,410 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 06:20:54,410 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 06:20:54,410 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 06:20:54,410 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 06:20:54,410 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 06:20:54,410 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 06:20:54,410 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 06:20:54,410 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 06:20:54,410 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 06:20:54,411 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 06:20:54,411 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 06:20:54,411 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 06:20:54,411 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 06:20:54,411 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 06:20:54,411 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 06:20:54,411 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 06:20:54,411 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 06:20:54,462 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 06:20:54,463 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 06:20:54,603 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 06:20:54,608 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 06:20:54,608 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-20 06:20:54,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 06:20:54 BoogieIcfgContainer [2022-03-20 06:20:54,609 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 06:20:54,610 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 06:20:54,610 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 06:20:54,610 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 06:20:54,613 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 06:20:54" (1/1) ... [2022-03-20 06:20:54,617 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-03-20 06:20:54,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 06:20:54 BasicIcfg [2022-03-20 06:20:54,631 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 06:20:54,632 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 06:20:54,632 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 06:20:54,634 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 06:20:54,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 06:20:54" (1/4) ... [2022-03-20 06:20:54,635 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ec070f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 06:20:54, skipping insertion in model container [2022-03-20 06:20:54,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:20:54" (2/4) ... [2022-03-20 06:20:54,636 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ec070f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 06:20:54, skipping insertion in model container [2022-03-20 06:20:54,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 06:20:54" (3/4) ... [2022-03-20 06:20:54,636 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ec070f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 06:20:54, skipping insertion in model container [2022-03-20 06:20:54,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 06:20:54" (4/4) ... [2022-03-20 06:20:54,637 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2_valuebound1.cJordan [2022-03-20 06:20:54,642 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-20 06:20:54,642 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 06:20:54,670 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 06:20:54,691 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 06:20:54,691 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 06:20:54,710 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 06:20:54,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 06:20:54,715 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:20:54,715 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:20:54,716 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:20:54,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:20:54,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1625753047, now seen corresponding path program 1 times [2022-03-20 06:20:54,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:20:54,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90221589] [2022-03-20 06:20:54,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:20:54,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:20:54,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:20:54,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 06:20:54,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:20:54,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 06:20:54,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:20:54,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 06:20:54,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:20:54,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90221589] [2022-03-20 06:20:54,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90221589] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 06:20:54,926 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 06:20:54,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 06:20:54,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626525253] [2022-03-20 06:20:54,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 06:20:54,932 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 06:20:54,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:20:54,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 06:20:54,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 06:20:54,958 INFO L87 Difference]: Start difference. First operand has 35 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 06:20:55,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:20:55,032 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2022-03-20 06:20:55,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 06:20:55,034 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-20 06:20:55,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:20:55,039 INFO L225 Difference]: With dead ends: 35 [2022-03-20 06:20:55,039 INFO L226 Difference]: Without dead ends: 30 [2022-03-20 06:20:55,041 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 06:20:55,044 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 06:20:55,044 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 38 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 06:20:55,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-20 06:20:55,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-03-20 06:20:55,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 06:20:55,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2022-03-20 06:20:55,075 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 17 [2022-03-20 06:20:55,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:20:55,076 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2022-03-20 06:20:55,076 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 06:20:55,077 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2022-03-20 06:20:55,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 06:20:55,078 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:20:55,078 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:20:55,078 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 06:20:55,078 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:20:55,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:20:55,080 INFO L85 PathProgramCache]: Analyzing trace with hash 861759786, now seen corresponding path program 1 times [2022-03-20 06:20:55,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:20:55,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297976853] [2022-03-20 06:20:55,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:20:55,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:20:55,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:20:55,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 06:20:55,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:20:55,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 06:20:55,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:20:55,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 06:20:55,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:20:55,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297976853] [2022-03-20 06:20:55,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297976853] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 06:20:55,211 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 06:20:55,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 06:20:55,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817845919] [2022-03-20 06:20:55,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 06:20:55,213 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 06:20:55,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:20:55,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 06:20:55,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 06:20:55,213 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 06:20:55,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:20:55,412 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2022-03-20 06:20:55,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 06:20:55,413 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-20 06:20:55,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:20:55,428 INFO L225 Difference]: With dead ends: 41 [2022-03-20 06:20:55,428 INFO L226 Difference]: Without dead ends: 41 [2022-03-20 06:20:55,428 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 06:20:55,429 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 37 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 06:20:55,430 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 45 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 06:20:55,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-20 06:20:55,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2022-03-20 06:20:55,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 06:20:55,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2022-03-20 06:20:55,440 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 17 [2022-03-20 06:20:55,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:20:55,440 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2022-03-20 06:20:55,440 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 06:20:55,441 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2022-03-20 06:20:55,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 06:20:55,441 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:20:55,441 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:20:55,441 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 06:20:55,441 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:20:55,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:20:55,442 INFO L85 PathProgramCache]: Analyzing trace with hash 325569287, now seen corresponding path program 1 times [2022-03-20 06:20:55,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:20:55,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694954153] [2022-03-20 06:20:55,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:20:55,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:20:55,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:20:55,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 06:20:55,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:20:55,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 06:20:55,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:20:55,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 06:20:55,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:20:55,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 06:20:55,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:20:55,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694954153] [2022-03-20 06:20:55,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694954153] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 06:20:55,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 06:20:55,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 06:20:55,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844851242] [2022-03-20 06:20:55,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 06:20:55,526 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 06:20:55,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:20:55,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 06:20:55,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 06:20:55,527 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 06:20:55,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:20:55,674 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2022-03-20 06:20:55,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 06:20:55,675 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-03-20 06:20:55,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:20:55,675 INFO L225 Difference]: With dead ends: 45 [2022-03-20 06:20:55,676 INFO L226 Difference]: Without dead ends: 45 [2022-03-20 06:20:55,676 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 06:20:55,677 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 32 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 06:20:55,677 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 45 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 06:20:55,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-20 06:20:55,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2022-03-20 06:20:55,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 06:20:55,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2022-03-20 06:20:55,682 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 22 [2022-03-20 06:20:55,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:20:55,682 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2022-03-20 06:20:55,682 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 06:20:55,683 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2022-03-20 06:20:55,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-20 06:20:55,683 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:20:55,683 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:20:55,683 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-20 06:20:55,683 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:20:55,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:20:55,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1461652409, now seen corresponding path program 1 times [2022-03-20 06:20:55,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:20:55,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849042329] [2022-03-20 06:20:55,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:20:55,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:20:55,693 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:20:55,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2036857473] [2022-03-20 06:20:55,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:20:55,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:20:55,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:20:55,695 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 06:20:55,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 06:20:55,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:20:55,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 06:20:55,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:20:55,941 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 06:20:55,942 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 06:20:55,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:20:55,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849042329] [2022-03-20 06:20:55,942 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:20:55,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036857473] [2022-03-20 06:20:55,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036857473] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 06:20:55,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 06:20:55,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 06:20:55,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893097689] [2022-03-20 06:20:55,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 06:20:55,943 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 06:20:55,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:20:55,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 06:20:55,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 06:20:55,944 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 06:20:55,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:20:55,998 INFO L93 Difference]: Finished difference Result 53 states and 65 transitions. [2022-03-20 06:20:55,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 06:20:55,998 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2022-03-20 06:20:55,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:20:56,001 INFO L225 Difference]: With dead ends: 53 [2022-03-20 06:20:56,001 INFO L226 Difference]: Without dead ends: 52 [2022-03-20 06:20:56,002 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 06:20:56,007 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 8 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 06:20:56,008 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 138 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 06:20:56,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-20 06:20:56,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-03-20 06:20:56,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 06:20:56,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2022-03-20 06:20:56,017 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 27 [2022-03-20 06:20:56,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:20:56,018 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2022-03-20 06:20:56,018 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 06:20:56,018 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2022-03-20 06:20:56,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-20 06:20:56,020 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:20:56,020 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:20:56,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 06:20:56,231 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:20:56,232 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:20:56,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:20:56,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1008917278, now seen corresponding path program 1 times [2022-03-20 06:20:56,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:20:56,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073226570] [2022-03-20 06:20:56,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:20:56,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:20:56,244 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:20:56,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [247699875] [2022-03-20 06:20:56,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:20:56,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:20:56,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:20:56,246 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 06:20:56,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 06:20:56,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:20:56,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 06:20:56,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:20:56,432 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 06:20:56,432 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 06:20:56,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:20:56,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073226570] [2022-03-20 06:20:56,432 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:20:56,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247699875] [2022-03-20 06:20:56,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247699875] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 06:20:56,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 06:20:56,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 06:20:56,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132246717] [2022-03-20 06:20:56,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 06:20:56,433 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 06:20:56,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:20:56,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 06:20:56,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 06:20:56,434 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 06:20:56,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:20:56,506 INFO L93 Difference]: Finished difference Result 63 states and 78 transitions. [2022-03-20 06:20:56,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 06:20:56,507 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2022-03-20 06:20:56,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:20:56,508 INFO L225 Difference]: With dead ends: 63 [2022-03-20 06:20:56,508 INFO L226 Difference]: Without dead ends: 58 [2022-03-20 06:20:56,509 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 06:20:56,510 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 9 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 06:20:56,510 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 112 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 06:20:56,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-03-20 06:20:56,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2022-03-20 06:20:56,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 35 states have internal predecessors, (39), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-20 06:20:56,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2022-03-20 06:20:56,521 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 34 [2022-03-20 06:20:56,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:20:56,521 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2022-03-20 06:20:56,521 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 06:20:56,522 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2022-03-20 06:20:56,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-20 06:20:56,522 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:20:56,522 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:20:56,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 06:20:56,739 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:20:56,740 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:20:56,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:20:56,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1762200840, now seen corresponding path program 1 times [2022-03-20 06:20:56,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:20:56,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996726124] [2022-03-20 06:20:56,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:20:56,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:20:56,758 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:20:56,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1517756956] [2022-03-20 06:20:56,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:20:56,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:20:56,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:20:56,769 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 06:20:56,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 06:20:56,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:20:56,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 06:20:56,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:20:56,972 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 06:20:56,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 06:20:57,080 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-20 06:20:57,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:20:57,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996726124] [2022-03-20 06:20:57,081 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:20:57,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517756956] [2022-03-20 06:20:57,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517756956] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 06:20:57,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 06:20:57,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-03-20 06:20:57,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367848548] [2022-03-20 06:20:57,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 06:20:57,082 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 06:20:57,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:20:57,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 06:20:57,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-20 06:20:57,083 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 06:20:57,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:20:57,127 INFO L93 Difference]: Finished difference Result 67 states and 82 transitions. [2022-03-20 06:20:57,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 06:20:57,128 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 44 [2022-03-20 06:20:57,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:20:57,130 INFO L225 Difference]: With dead ends: 67 [2022-03-20 06:20:57,130 INFO L226 Difference]: Without dead ends: 67 [2022-03-20 06:20:57,131 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-20 06:20:57,131 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 8 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 06:20:57,132 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 122 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 06:20:57,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-20 06:20:57,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2022-03-20 06:20:57,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 37 states have (on average 1.162162162162162) internal successors, (43), 40 states have internal predecessors, (43), 18 states have call successors, (18), 9 states have call predecessors, (18), 8 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 06:20:57,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2022-03-20 06:20:57,139 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 44 [2022-03-20 06:20:57,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:20:57,139 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2022-03-20 06:20:57,140 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 06:20:57,140 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2022-03-20 06:20:57,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-20 06:20:57,141 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:20:57,141 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:20:57,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 06:20:57,363 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:20:57,364 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:20:57,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:20:57,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1382136022, now seen corresponding path program 1 times [2022-03-20 06:20:57,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:20:57,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463216714] [2022-03-20 06:20:57,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:20:57,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:20:57,388 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:20:57,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [721519203] [2022-03-20 06:20:57,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:20:57,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:20:57,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:20:57,390 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 06:20:57,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 06:20:57,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:20:57,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 06:20:57,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:20:57,775 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-20 06:20:57,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 06:20:58,581 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-20 06:20:58,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:20:58,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463216714] [2022-03-20 06:20:58,581 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:20:58,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721519203] [2022-03-20 06:20:58,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721519203] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 06:20:58,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 06:20:58,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-03-20 06:20:58,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250668956] [2022-03-20 06:20:58,582 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 06:20:58,582 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 06:20:58,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:20:58,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 06:20:58,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-20 06:20:58,583 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 7 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-03-20 06:21:02,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:21:02,556 INFO L93 Difference]: Finished difference Result 131 states and 176 transitions. [2022-03-20 06:21:02,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 06:21:02,557 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 7 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 64 [2022-03-20 06:21:02,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:21:02,559 INFO L225 Difference]: With dead ends: 131 [2022-03-20 06:21:02,559 INFO L226 Difference]: Without dead ends: 125 [2022-03-20 06:21:02,559 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 116 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-03-20 06:21:02,560 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 36 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 06:21:02,560 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 299 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 06:21:02,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-03-20 06:21:02,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 113. [2022-03-20 06:21:02,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 67 states have (on average 1.2238805970149254) internal successors, (82), 71 states have internal predecessors, (82), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (31), 28 states have call predecessors, (31), 31 states have call successors, (31) [2022-03-20 06:21:02,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 146 transitions. [2022-03-20 06:21:02,571 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 146 transitions. Word has length 64 [2022-03-20 06:21:02,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:21:02,571 INFO L478 AbstractCegarLoop]: Abstraction has 113 states and 146 transitions. [2022-03-20 06:21:02,571 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 7 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-03-20 06:21:02,572 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 146 transitions. [2022-03-20 06:21:02,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-20 06:21:02,573 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:21:02,573 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:21:02,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 06:21:02,773 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:21:02,774 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:21:02,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:21:02,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1085940318, now seen corresponding path program 1 times [2022-03-20 06:21:02,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:21:02,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301605561] [2022-03-20 06:21:02,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:21:02,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:21:02,782 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:21:02,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1154137135] [2022-03-20 06:21:02,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:21:02,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:21:02,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:21:02,784 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 06:21:02,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 06:21:02,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:21:02,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-20 06:21:02,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:21:03,159 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 66 proven. 11 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-03-20 06:21:03,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 06:21:03,352 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-03-20 06:21:03,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:21:03,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301605561] [2022-03-20 06:21:03,353 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:21:03,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154137135] [2022-03-20 06:21:03,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154137135] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 06:21:03,353 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 06:21:03,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2022-03-20 06:21:03,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997756582] [2022-03-20 06:21:03,353 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 06:21:03,354 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 06:21:03,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:21:03,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 06:21:03,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-03-20 06:21:03,356 INFO L87 Difference]: Start difference. First operand 113 states and 146 transitions. Second operand has 15 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 5 states have call successors, (19) [2022-03-20 06:21:03,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:21:03,569 INFO L93 Difference]: Finished difference Result 134 states and 165 transitions. [2022-03-20 06:21:03,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 06:21:03,569 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 5 states have call successors, (19) Word has length 75 [2022-03-20 06:21:03,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:21:03,570 INFO L225 Difference]: With dead ends: 134 [2022-03-20 06:21:03,570 INFO L226 Difference]: Without dead ends: 115 [2022-03-20 06:21:03,571 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 133 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-03-20 06:21:03,571 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 39 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 06:21:03,571 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 181 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 06:21:03,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-03-20 06:21:03,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 101. [2022-03-20 06:21:03,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 61 states have (on average 1.1639344262295082) internal successors, (71), 64 states have internal predecessors, (71), 26 states have call successors, (26), 14 states have call predecessors, (26), 13 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-20 06:21:03,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 121 transitions. [2022-03-20 06:21:03,577 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 121 transitions. Word has length 75 [2022-03-20 06:21:03,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:21:03,577 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 121 transitions. [2022-03-20 06:21:03,577 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 5 states have call successors, (19) [2022-03-20 06:21:03,577 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 121 transitions. [2022-03-20 06:21:03,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-03-20 06:21:03,578 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:21:03,578 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 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] [2022-03-20 06:21:03,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 06:21:03,778 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:21:03,779 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:21:03,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:21:03,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1480109990, now seen corresponding path program 1 times [2022-03-20 06:21:03,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:21:03,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414026742] [2022-03-20 06:21:03,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:21:03,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:21:03,786 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:21:03,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [471492916] [2022-03-20 06:21:03,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:21:03,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:21:03,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:21:03,788 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 06:21:03,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 06:21:03,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:21:03,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 06:21:03,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:21:04,003 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-03-20 06:21:04,004 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 06:21:04,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:21:04,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414026742] [2022-03-20 06:21:04,004 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:21:04,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471492916] [2022-03-20 06:21:04,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471492916] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 06:21:04,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 06:21:04,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 06:21:04,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924466302] [2022-03-20 06:21:04,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 06:21:04,005 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 06:21:04,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:21:04,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 06:21:04,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-20 06:21:04,005 INFO L87 Difference]: Start difference. First operand 101 states and 121 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-20 06:21:04,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:21:04,035 INFO L93 Difference]: Finished difference Result 103 states and 122 transitions. [2022-03-20 06:21:04,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 06:21:04,036 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 84 [2022-03-20 06:21:04,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:21:04,038 INFO L225 Difference]: With dead ends: 103 [2022-03-20 06:21:04,038 INFO L226 Difference]: Without dead ends: 103 [2022-03-20 06:21:04,038 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-20 06:21:04,040 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 14 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 06:21:04,040 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 86 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 06:21:04,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-20 06:21:04,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-03-20 06:21:04,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 63 states have (on average 1.1428571428571428) internal successors, (72), 64 states have internal predecessors, (72), 26 states have call successors, (26), 14 states have call predecessors, (26), 13 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-20 06:21:04,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 122 transitions. [2022-03-20 06:21:04,054 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 122 transitions. Word has length 84 [2022-03-20 06:21:04,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:21:04,055 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 122 transitions. [2022-03-20 06:21:04,055 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-20 06:21:04,055 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 122 transitions. [2022-03-20 06:21:04,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-03-20 06:21:04,060 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:21:04,060 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:21:04,080 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-20 06:21:04,278 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:21:04,278 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:21:04,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:21:04,278 INFO L85 PathProgramCache]: Analyzing trace with hash -233495842, now seen corresponding path program 2 times [2022-03-20 06:21:04,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:21:04,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469228908] [2022-03-20 06:21:04,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:21:04,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:21:04,285 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:21:04,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1370639965] [2022-03-20 06:21:04,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 06:21:04,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:21:04,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:21:04,291 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 06:21:04,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 06:21:04,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 06:21:04,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 06:21:04,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-20 06:21:04,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:21:04,532 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 195 proven. 0 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2022-03-20 06:21:04,532 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 06:21:04,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:21:04,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469228908] [2022-03-20 06:21:04,532 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:21:04,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370639965] [2022-03-20 06:21:04,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370639965] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 06:21:04,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 06:21:04,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 06:21:04,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001845525] [2022-03-20 06:21:04,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 06:21:04,533 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 06:21:04,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:21:04,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 06:21:04,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-03-20 06:21:04,534 INFO L87 Difference]: Start difference. First operand 103 states and 122 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-20 06:21:04,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:21:04,572 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2022-03-20 06:21:04,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 06:21:04,572 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 94 [2022-03-20 06:21:04,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:21:04,572 INFO L225 Difference]: With dead ends: 38 [2022-03-20 06:21:04,572 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 06:21:04,573 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-20 06:21:04,573 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 4 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 06:21:04,573 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 124 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 06:21:04,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 06:21:04,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 06:21:04,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-20 06:21:04,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 06:21:04,574 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 94 [2022-03-20 06:21:04,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:21:04,574 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 06:21:04,574 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-20 06:21:04,574 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 06:21:04,574 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 06:21:04,576 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 06:21:04,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 06:21:04,794 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:21:04,796 INFO L719 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:21:04,797 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 06:21:04,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 06:21:04 BasicIcfg [2022-03-20 06:21:04,799 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 06:21:04,799 INFO L158 Benchmark]: Toolchain (without parser) took 10749.28ms. Allocated memory was 205.5MB in the beginning and 247.5MB in the end (delta: 41.9MB). Free memory was 150.5MB in the beginning and 208.6MB in the end (delta: -58.1MB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 06:21:04,799 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 205.5MB. Free memory is still 166.5MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 06:21:04,799 INFO L158 Benchmark]: CACSL2BoogieTranslator took 257.55ms. Allocated memory was 205.5MB in the beginning and 247.5MB in the end (delta: 41.9MB). Free memory was 150.3MB in the beginning and 221.2MB in the end (delta: -70.8MB). Peak memory consumption was 7.4MB. Max. memory is 8.0GB. [2022-03-20 06:21:04,800 INFO L158 Benchmark]: Boogie Preprocessor took 28.78ms. Allocated memory is still 247.5MB. Free memory was 221.2MB in the beginning and 219.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-20 06:21:04,800 INFO L158 Benchmark]: RCFGBuilder took 268.43ms. Allocated memory is still 247.5MB. Free memory was 219.7MB in the beginning and 208.6MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-20 06:21:04,800 INFO L158 Benchmark]: IcfgTransformer took 21.27ms. Allocated memory is still 247.5MB. Free memory was 208.1MB in the beginning and 207.1MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 06:21:04,800 INFO L158 Benchmark]: TraceAbstraction took 10167.01ms. Allocated memory is still 247.5MB. Free memory was 206.7MB in the beginning and 208.6MB in the end (delta: -1.9MB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 06:21:04,801 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 205.5MB. Free memory is still 166.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 257.55ms. Allocated memory was 205.5MB in the beginning and 247.5MB in the end (delta: 41.9MB). Free memory was 150.3MB in the beginning and 221.2MB in the end (delta: -70.8MB). Peak memory consumption was 7.4MB. Max. memory is 8.0GB. * Boogie Preprocessor took 28.78ms. Allocated memory is still 247.5MB. Free memory was 221.2MB in the beginning and 219.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 268.43ms. Allocated memory is still 247.5MB. Free memory was 219.7MB in the beginning and 208.6MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 21.27ms. Allocated memory is still 247.5MB. Free memory was 208.1MB in the beginning and 207.1MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 10167.01ms. Allocated memory is still 247.5MB. Free memory was 206.7MB in the beginning and 208.6MB in the end (delta: -1.9MB). There was no memory consumed. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 10.1s, OverallIterations: 10, TraceHistogramMax: 14, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 4.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 257 SdHoareTripleChecker+Valid, 1.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 207 mSDsluCounter, 1190 SdHoareTripleChecker+Invalid, 1.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 834 mSDsCounter, 224 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 842 IncrementalHoareTripleChecker+Invalid, 1066 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 224 mSolverCounterUnsat, 356 mSDtfsCounter, 842 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 645 GetRequests, 568 SyntacticMatches, 8 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 3.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=113occurred in iteration=7, InterpolantAutomatonStates: 66, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 44 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.9s InterpolantComputationTime, 478 NumberOfCodeBlocks, 478 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 648 ConstructedInterpolants, 0 QuantifiedInterpolants, 3057 SizeOfPredicates, 16 NumberOfNonLiveVariables, 1081 ConjunctsInSsa, 107 ConjunctsInUnsatCore, 13 InterpolantComputations, 8 PerfectInterpolantSequences, 1458/1489 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-03-20 06:21:04,820 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 0 Received shutdown request...