/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/loop-new/count_by_k.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 17:18:17,230 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 17:18:17,232 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 17:18:17,258 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 17:18:17,270 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-18 17:18:17,271 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-18 17:18:17,271 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-18 17:18:17,272 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-18 17:18:17,272 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-18 17:18:17,273 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-18 17:18:17,273 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-18 17:18:17,274 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-18 17:18:17,275 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-18 17:18:17,278 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-18 17:18:17,279 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-18 17:18:17,280 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-18 17:18:17,280 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-18 17:18:17,282 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-18 17:18:17,286 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 17:18:17,286 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 17:18:17,293 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 17:18:17,293 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-18 17:18:17,302 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 17:18:17,302 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 17:18:17,302 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 17:18:17,303 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-18 17:18:17,303 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 17:18:17,303 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-18 17:18:17,303 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 17:18:17,303 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 17:18:17,303 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 17:18:17,303 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 17:18:17,303 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-18 17:18:17,303 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 17:18:17,303 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 17:18:17,303 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 17:18:17,304 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 17:18:17,304 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 17:18:17,304 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 17:18:17,304 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 17:18:17,304 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 17:18:17,304 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 17:18:17,304 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 17:18:17,305 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-18 17:18:17,305 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 17:18:17,437 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 17:18:17,456 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 17:18:17,457 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 17:18:17,458 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 17:18:17,462 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 17:18:17,463 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/count_by_k.i [2022-03-18 17:18:17,514 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9da1d6e88/3b8ba04829ed4ed6a39c20a83d39fcb1/FLAG8592bb58c [2022-03-18 17:18:17,855 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 17:18:17,856 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_k.i [2022-03-18 17:18:17,861 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9da1d6e88/3b8ba04829ed4ed6a39c20a83d39fcb1/FLAG8592bb58c [2022-03-18 17:18:18,282 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9da1d6e88/3b8ba04829ed4ed6a39c20a83d39fcb1 [2022-03-18 17:18:18,284 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 17:18:18,285 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-18 17:18:18,286 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 17:18:18,286 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 17:18:18,288 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 17:18:18,288 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 05:18:18" (1/1) ... [2022-03-18 17:18:18,289 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@119c9988 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:18:18, skipping insertion in model container [2022-03-18 17:18:18,289 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 05:18:18" (1/1) ... [2022-03-18 17:18:18,293 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 17:18:18,301 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 17:18:18,418 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_k.i[891,904] [2022-03-18 17:18:18,425 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 17:18:18,429 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 17:18:18,437 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_k.i[891,904] [2022-03-18 17:18:18,438 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 17:18:18,448 INFO L208 MainTranslator]: Completed translation [2022-03-18 17:18:18,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:18:18 WrapperNode [2022-03-18 17:18:18,448 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 17:18:18,449 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 17:18:18,449 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 17:18:18,449 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 17:18:18,456 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:18:18" (1/1) ... [2022-03-18 17:18:18,457 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:18:18" (1/1) ... [2022-03-18 17:18:18,460 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:18:18" (1/1) ... [2022-03-18 17:18:18,461 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:18:18" (1/1) ... [2022-03-18 17:18:18,463 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:18:18" (1/1) ... [2022-03-18 17:18:18,465 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:18:18" (1/1) ... [2022-03-18 17:18:18,466 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:18:18" (1/1) ... [2022-03-18 17:18:18,467 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 17:18:18,467 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 17:18:18,467 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 17:18:18,468 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 17:18:18,468 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:18:18" (1/1) ... [2022-03-18 17:18:18,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 17:18:18,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 17:18:18,496 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) [2022-03-18 17:18:18,498 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 [2022-03-18 17:18:18,524 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 17:18:18,524 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 17:18:18,525 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 17:18:18,525 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 17:18:18,525 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 17:18:18,525 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 17:18:18,526 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 17:18:18,526 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 17:18:18,526 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-18 17:18:18,526 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-18 17:18:18,526 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 17:18:18,527 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 17:18:18,527 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 17:18:18,527 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 17:18:18,528 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 17:18:18,529 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 17:18:18,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 17:18:18,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 17:18:18,530 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 17:18:18,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 17:18:18,530 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 17:18:18,530 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 17:18:18,580 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 17:18:18,581 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 17:18:18,669 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 17:18:18,673 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 17:18:18,673 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-18 17:18:18,674 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 05:18:18 BoogieIcfgContainer [2022-03-18 17:18:18,674 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 17:18:18,678 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-18 17:18:18,679 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-18 17:18:18,679 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-18 17:18:18,681 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 05:18:18" (1/1) ... [2022-03-18 17:18:18,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 05:18:18 BasicIcfg [2022-03-18 17:18:18,718 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-18 17:18:18,719 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 17:18:18,719 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 17:18:18,721 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 17:18:18,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 05:18:18" (1/4) ... [2022-03-18 17:18:18,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53327638 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 05:18:18, skipping insertion in model container [2022-03-18 17:18:18,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:18:18" (2/4) ... [2022-03-18 17:18:18,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53327638 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 05:18:18, skipping insertion in model container [2022-03-18 17:18:18,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 05:18:18" (3/4) ... [2022-03-18 17:18:18,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53327638 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 05:18:18, skipping insertion in model container [2022-03-18 17:18:18,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 05:18:18" (4/4) ... [2022-03-18 17:18:18,723 INFO L111 eAbstractionObserver]: Analyzing ICFG count_by_k.iJordan [2022-03-18 17:18:18,726 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-18 17:18:18,727 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 17:18:18,753 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 17:18:18,759 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 [2022-03-18 17:18:18,759 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 17:18:18,768 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 17:18:18,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-18 17:18:18,775 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:18:18,776 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:18:18,776 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:18:18,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:18:18,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1527693123, now seen corresponding path program 1 times [2022-03-18 17:18:18,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:18:18,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536830299] [2022-03-18 17:18:18,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:18:18,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:18:18,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:18:18,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:18:18,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:18:18,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 17:18:18,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:18:18,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536830299] [2022-03-18 17:18:18,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536830299] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 17:18:18,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 17:18:18,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 17:18:18,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280756502] [2022-03-18 17:18:18,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 17:18:18,960 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 17:18:18,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:18:18,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 17:18:18,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 17:18:18,988 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:18:19,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:18:19,020 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2022-03-18 17:18:19,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 17:18:19,022 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-18 17:18:19,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:18:19,026 INFO L225 Difference]: With dead ends: 21 [2022-03-18 17:18:19,026 INFO L226 Difference]: Without dead ends: 14 [2022-03-18 17:18:19,028 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 17:18:19,032 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 13 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 17:18:19,033 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 24 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 17:18:19,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-03-18 17:18:19,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-03-18 17:18:19,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:18:19,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2022-03-18 17:18:19,053 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2022-03-18 17:18:19,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:18:19,054 INFO L478 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2022-03-18 17:18:19,054 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:18:19,054 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2022-03-18 17:18:19,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-18 17:18:19,055 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:18:19,055 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:18:19,055 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 17:18:19,056 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:18:19,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:18:19,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1526769602, now seen corresponding path program 1 times [2022-03-18 17:18:19,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:18:19,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836101141] [2022-03-18 17:18:19,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:18:19,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:18:19,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:18:19,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:18:19,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:18:19,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 17:18:19,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:18:19,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836101141] [2022-03-18 17:18:19,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836101141] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 17:18:19,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 17:18:19,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-18 17:18:19,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919040425] [2022-03-18 17:18:19,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 17:18:19,214 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-18 17:18:19,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:18:19,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-18 17:18:19,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-03-18 17:18:19,216 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:18:19,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:18:19,297 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2022-03-18 17:18:19,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 17:18:19,298 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-18 17:18:19,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:18:19,298 INFO L225 Difference]: With dead ends: 19 [2022-03-18 17:18:19,299 INFO L226 Difference]: Without dead ends: 16 [2022-03-18 17:18:19,299 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-03-18 17:18:19,300 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 14 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 17:18:19,300 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 27 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 17:18:19,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-03-18 17:18:19,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2022-03-18 17:18:19,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:18:19,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2022-03-18 17:18:19,303 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2022-03-18 17:18:19,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:18:19,303 INFO L478 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2022-03-18 17:18:19,303 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:18:19,303 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2022-03-18 17:18:19,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-18 17:18:19,304 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:18:19,304 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:18:19,304 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 17:18:19,304 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:18:19,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:18:19,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1730344036, now seen corresponding path program 1 times [2022-03-18 17:18:19,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:18:19,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105628189] [2022-03-18 17:18:19,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:18:19,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:18:19,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:18:19,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:18:19,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:18:19,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 17:18:19,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:18:19,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105628189] [2022-03-18 17:18:19,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105628189] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 17:18:19,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033847763] [2022-03-18 17:18:19,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:18:19,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:18:19,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 17:18:19,385 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) [2022-03-18 17:18:19,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 17:18:19,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:18:19,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 17:18:19,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 17:18:19,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 17:18:19,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 17:18:19,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 17:18:19,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033847763] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 17:18:19,634 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 17:18:19,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 14 [2022-03-18 17:18:19,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526007913] [2022-03-18 17:18:19,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 17:18:19,638 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-18 17:18:19,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:18:19,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-18 17:18:19,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-03-18 17:18:19,640 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:18:19,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:18:19,751 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2022-03-18 17:18:19,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 17:18:19,751 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-03-18 17:18:19,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:18:19,753 INFO L225 Difference]: With dead ends: 21 [2022-03-18 17:18:19,753 INFO L226 Difference]: Without dead ends: 21 [2022-03-18 17:18:19,753 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2022-03-18 17:18:19,755 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 19 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 17:18:19,757 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 49 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 17:18:19,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-03-18 17:18:19,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-03-18 17:18:19,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:18:19,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2022-03-18 17:18:19,762 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 14 [2022-03-18 17:18:19,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:18:19,762 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2022-03-18 17:18:19,762 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:18:19,762 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2022-03-18 17:18:19,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-18 17:18:19,763 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:18:19,763 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:18:19,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 17:18:19,973 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:18:19,974 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:18:19,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:18:19,974 INFO L85 PathProgramCache]: Analyzing trace with hash -349607754, now seen corresponding path program 2 times [2022-03-18 17:18:19,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:18:19,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781995337] [2022-03-18 17:18:19,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:18:19,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:18:19,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:18:20,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:18:20,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:18:20,045 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 17:18:20,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:18:20,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781995337] [2022-03-18 17:18:20,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781995337] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 17:18:20,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177248060] [2022-03-18 17:18:20,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 17:18:20,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:18:20,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 17:18:20,049 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) [2022-03-18 17:18:20,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 17:18:20,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 17:18:20,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 17:18:20,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 17:18:20,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 17:18:20,157 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 17:18:20,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 17:18:20,280 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 17:18:20,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177248060] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 17:18:20,280 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 17:18:20,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2022-03-18 17:18:20,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020188263] [2022-03-18 17:18:20,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 17:18:20,281 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-18 17:18:20,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:18:20,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-18 17:18:20,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2022-03-18 17:18:20,282 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:18:20,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:18:20,494 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2022-03-18 17:18:20,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-18 17:18:20,494 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-03-18 17:18:20,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:18:20,495 INFO L225 Difference]: With dead ends: 31 [2022-03-18 17:18:20,495 INFO L226 Difference]: Without dead ends: 31 [2022-03-18 17:18:20,495 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=226, Invalid=530, Unknown=0, NotChecked=0, Total=756 [2022-03-18 17:18:20,496 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 40 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 17:18:20,496 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 29 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 17:18:20,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-18 17:18:20,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-03-18 17:18:20,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:18:20,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2022-03-18 17:18:20,499 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 20 [2022-03-18 17:18:20,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:18:20,499 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2022-03-18 17:18:20,499 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:18:20,499 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2022-03-18 17:18:20,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-18 17:18:20,500 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:18:20,500 INFO L500 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:18:20,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 17:18:20,715 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-18 17:18:20,716 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:18:20,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:18:20,716 INFO L85 PathProgramCache]: Analyzing trace with hash 751745164, now seen corresponding path program 3 times [2022-03-18 17:18:20,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:18:20,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746238918] [2022-03-18 17:18:20,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:18:20,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:18:20,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:18:20,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:18:20,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:18:20,848 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 17:18:20,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:18:20,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746238918] [2022-03-18 17:18:20,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746238918] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 17:18:20,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187184310] [2022-03-18 17:18:20,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 17:18:20,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:18:20,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 17:18:20,850 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) [2022-03-18 17:18:20,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 17:18:20,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-03-18 17:18:20,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 17:18:20,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-18 17:18:20,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 17:18:20,994 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 17:18:20,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 17:18:21,274 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 17:18:21,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187184310] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 17:18:21,274 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 17:18:21,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 27 [2022-03-18 17:18:21,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057562368] [2022-03-18 17:18:21,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 17:18:21,275 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-18 17:18:21,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:18:21,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-18 17:18:21,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2022-03-18 17:18:21,276 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 26 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:18:21,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:18:21,790 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2022-03-18 17:18:21,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-18 17:18:21,790 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 26 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-03-18 17:18:21,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:18:21,791 INFO L225 Difference]: With dead ends: 51 [2022-03-18 17:18:21,791 INFO L226 Difference]: Without dead ends: 51 [2022-03-18 17:18:21,792 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=706, Invalid=1550, Unknown=0, NotChecked=0, Total=2256 [2022-03-18 17:18:21,792 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 61 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 17:18:21,792 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 59 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 17:18:21,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-18 17:18:21,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-03-18 17:18:21,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 46 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:18:21,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2022-03-18 17:18:21,796 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 30 [2022-03-18 17:18:21,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:18:21,796 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2022-03-18 17:18:21,796 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 26 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:18:21,796 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2022-03-18 17:18:21,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-18 17:18:21,797 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:18:21,797 INFO L500 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:18:21,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 17:18:21,997 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:18:21,998 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:18:21,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:18:21,998 INFO L85 PathProgramCache]: Analyzing trace with hash 659537336, now seen corresponding path program 4 times [2022-03-18 17:18:21,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:18:21,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110367973] [2022-03-18 17:18:21,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:18:21,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:18:22,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:18:22,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:18:22,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:18:22,282 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 17:18:22,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:18:22,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110367973] [2022-03-18 17:18:22,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110367973] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 17:18:22,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130008406] [2022-03-18 17:18:22,282 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 17:18:22,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:18:22,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 17:18:22,284 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) [2022-03-18 17:18:22,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 17:18:22,316 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 17:18:22,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 17:18:22,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-18 17:18:22,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 17:18:22,475 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 17:18:22,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 17:18:23,135 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 17:18:23,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130008406] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 17:18:23,136 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 17:18:23,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 47 [2022-03-18 17:18:23,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410623569] [2022-03-18 17:18:23,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 17:18:23,136 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-18 17:18:23,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:18:23,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-18 17:18:23,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=1491, Unknown=0, NotChecked=0, Total=2162 [2022-03-18 17:18:23,138 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 47 states, 47 states have (on average 1.9787234042553192) internal successors, (93), 46 states have internal predecessors, (93), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:18:24,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:18:24,664 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2022-03-18 17:18:24,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-18 17:18:24,665 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9787234042553192) internal successors, (93), 46 states have internal predecessors, (93), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-03-18 17:18:24,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:18:24,666 INFO L225 Difference]: With dead ends: 91 [2022-03-18 17:18:24,666 INFO L226 Difference]: Without dead ends: 91 [2022-03-18 17:18:24,668 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1152 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2491, Invalid=5165, Unknown=0, NotChecked=0, Total=7656 [2022-03-18 17:18:24,668 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 160 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 17:18:24,669 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 34 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 17:18:24,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-03-18 17:18:24,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-03-18 17:18:24,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.0116279069767442) internal successors, (87), 86 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:18:24,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2022-03-18 17:18:24,673 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 50 [2022-03-18 17:18:24,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:18:24,673 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2022-03-18 17:18:24,673 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.9787234042553192) internal successors, (93), 46 states have internal predecessors, (93), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:18:24,674 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2022-03-18 17:18:24,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-03-18 17:18:24,674 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:18:24,674 INFO L500 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:18:24,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 17:18:24,888 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:18:24,888 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:18:24,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:18:24,889 INFO L85 PathProgramCache]: Analyzing trace with hash -263856624, now seen corresponding path program 5 times [2022-03-18 17:18:24,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:18:24,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087378343] [2022-03-18 17:18:24,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:18:24,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:18:24,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:18:25,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:18:25,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:18:25,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 17:18:25,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:18:25,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087378343] [2022-03-18 17:18:25,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087378343] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 17:18:25,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522307087] [2022-03-18 17:18:25,622 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 17:18:25,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:18:25,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 17:18:25,623 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) [2022-03-18 17:18:25,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 17:18:25,669 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2022-03-18 17:18:25,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 17:18:25,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-18 17:18:25,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 17:18:26,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 17:18:26,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 17:18:28,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 17:18:28,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522307087] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 17:18:28,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 17:18:28,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 43] total 104 [2022-03-18 17:18:28,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611761150] [2022-03-18 17:18:28,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 17:18:28,697 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-03-18 17:18:28,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:18:28,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-03-18 17:18:28,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2170, Invalid=8542, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 17:18:28,700 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand has 104 states, 104 states have (on average 1.9903846153846154) internal successors, (207), 103 states have internal predecessors, (207), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:18:37,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:18:37,092 INFO L93 Difference]: Finished difference Result 171 states and 171 transitions. [2022-03-18 17:18:37,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-03-18 17:18:37,092 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 1.9903846153846154) internal successors, (207), 103 states have internal predecessors, (207), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 90 [2022-03-18 17:18:37,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:18:37,093 INFO L225 Difference]: With dead ends: 171 [2022-03-18 17:18:37,093 INFO L226 Difference]: Without dead ends: 171 [2022-03-18 17:18:37,099 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6310 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=9387, Invalid=24653, Unknown=0, NotChecked=0, Total=34040 [2022-03-18 17:18:37,099 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 259 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 17:18:37,099 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 144 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 17:18:37,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-03-18 17:18:37,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2022-03-18 17:18:37,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.0060240963855422) internal successors, (167), 166 states have internal predecessors, (167), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:18:37,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2022-03-18 17:18:37,107 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 90 [2022-03-18 17:18:37,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:18:37,108 INFO L478 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2022-03-18 17:18:37,108 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 1.9903846153846154) internal successors, (207), 103 states have internal predecessors, (207), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:18:37,108 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2022-03-18 17:18:37,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-03-18 17:18:37,109 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:18:37,110 INFO L500 BasicCegarLoop]: trace histogram [79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:18:37,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 17:18:37,310 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:18:37,310 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:18:37,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:18:37,311 INFO L85 PathProgramCache]: Analyzing trace with hash 689338048, now seen corresponding path program 6 times [2022-03-18 17:18:37,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:18:37,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586914348] [2022-03-18 17:18:37,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:18:37,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:18:37,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:18:39,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:18:39,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:18:39,661 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 17:18:39,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:18:39,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586914348] [2022-03-18 17:18:39,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586914348] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 17:18:39,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391877901] [2022-03-18 17:18:39,662 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 17:18:39,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:18:39,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 17:18:39,663 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) [2022-03-18 17:18:39,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 17:18:39,749 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 80 check-sat command(s) [2022-03-18 17:18:39,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 17:18:39,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 82 conjunts are in the unsatisfiable core [2022-03-18 17:18:39,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 17:18:40,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 17:18:40,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 17:18:47,204 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 17:18:47,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391877901] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 17:18:47,204 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 17:18:47,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 83, 83] total 167 [2022-03-18 17:18:47,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242127591] [2022-03-18 17:18:47,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 17:18:47,205 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 167 states [2022-03-18 17:18:47,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:18:47,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 167 interpolants. [2022-03-18 17:18:47,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9821, Invalid=17901, Unknown=0, NotChecked=0, Total=27722 [2022-03-18 17:18:47,209 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand has 167 states, 167 states have (on average 1.9940119760479043) internal successors, (333), 166 states have internal predecessors, (333), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:19:08,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:19:08,296 INFO L93 Difference]: Finished difference Result 331 states and 331 transitions. [2022-03-18 17:19:08,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2022-03-18 17:19:08,297 INFO L78 Accepts]: Start accepts. Automaton has has 167 states, 167 states have (on average 1.9940119760479043) internal successors, (333), 166 states have internal predecessors, (333), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 170 [2022-03-18 17:19:08,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:19:08,298 INFO L225 Difference]: With dead ends: 331 [2022-03-18 17:19:08,298 INFO L226 Difference]: Without dead ends: 331 [2022-03-18 17:19:08,303 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 585 GetRequests, 258 SyntacticMatches, 1 SemanticMatches, 326 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16602 ImplicationChecksByTransitivity, 28.8s TimeCoverageRelationStatistics Valid=36301, Invalid=70955, Unknown=0, NotChecked=0, Total=107256 [2022-03-18 17:19:08,304 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 481 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 479 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 479 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 17:19:08,304 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [481 Valid, 49 Invalid, 848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [479 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 17:19:08,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-03-18 17:19:08,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 331. [2022-03-18 17:19:08,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 326 states have (on average 1.0030674846625767) internal successors, (327), 326 states have internal predecessors, (327), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:19:08,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 331 transitions. [2022-03-18 17:19:08,322 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 331 transitions. Word has length 170 [2022-03-18 17:19:08,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:19:08,325 INFO L478 AbstractCegarLoop]: Abstraction has 331 states and 331 transitions. [2022-03-18 17:19:08,325 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 167 states, 167 states have (on average 1.9940119760479043) internal successors, (333), 166 states have internal predecessors, (333), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:19:08,325 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 331 transitions. [2022-03-18 17:19:08,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2022-03-18 17:19:08,328 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:19:08,329 INFO L500 BasicCegarLoop]: trace histogram [159, 159, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:19:08,347 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-18 17:19:08,539 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:19:08,540 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:19:08,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:19:08,540 INFO L85 PathProgramCache]: Analyzing trace with hash -756479968, now seen corresponding path program 7 times [2022-03-18 17:19:08,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:19:08,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711854978] [2022-03-18 17:19:08,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:19:08,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:19:08,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:19:17,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:19:17,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:19:17,184 INFO L134 CoverageAnalysis]: Checked inductivity of 25281 backedges. 0 proven. 25281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 17:19:17,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:19:17,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711854978] [2022-03-18 17:19:17,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711854978] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 17:19:17,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033244024] [2022-03-18 17:19:17,184 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 17:19:17,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:19:17,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 17:19:17,188 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) [2022-03-18 17:19:17,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 17:19:19,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:19:20,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 162 conjunts are in the unsatisfiable core [2022-03-18 17:19:20,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 17:19:21,608 INFO L134 CoverageAnalysis]: Checked inductivity of 25281 backedges. 0 proven. 25281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 17:19:21,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 17:19:46,787 INFO L134 CoverageAnalysis]: Checked inductivity of 25281 backedges. 0 proven. 25281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 17:19:46,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033244024] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 17:19:46,787 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 17:19:46,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [164, 163, 163] total 327 [2022-03-18 17:19:46,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190311378] [2022-03-18 17:19:46,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 17:19:46,790 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 327 states [2022-03-18 17:19:46,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:19:46,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 327 interpolants. [2022-03-18 17:19:46,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38821, Invalid=67781, Unknown=0, NotChecked=0, Total=106602 [2022-03-18 17:19:46,801 INFO L87 Difference]: Start difference. First operand 331 states and 331 transitions. Second operand has 327 states, 327 states have (on average 1.996941896024465) internal successors, (653), 326 states have internal predecessors, (653), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:21:36,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:21:36,077 INFO L93 Difference]: Finished difference Result 651 states and 651 transitions. [2022-03-18 17:21:36,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 324 states. [2022-03-18 17:21:36,078 INFO L78 Accepts]: Start accepts. Automaton has has 327 states, 327 states have (on average 1.996941896024465) internal successors, (653), 326 states have internal predecessors, (653), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 330 [2022-03-18 17:21:36,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:21:36,080 INFO L225 Difference]: With dead ends: 651 [2022-03-18 17:21:36,080 INFO L226 Difference]: Without dead ends: 651 [2022-03-18 17:21:36,103 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1145 GetRequests, 498 SyntacticMatches, 1 SemanticMatches, 646 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65202 ImplicationChecksByTransitivity, 138.0s TimeCoverageRelationStatistics Valid=142981, Invalid=276275, Unknown=0, NotChecked=0, Total=419256 [2022-03-18 17:21:36,104 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 1439 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 959 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1439 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 959 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-18 17:21:36,104 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1439 Valid, 49 Invalid, 1656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [959 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-18 17:21:36,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2022-03-18 17:21:36,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 651. [2022-03-18 17:21:36,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 651 states, 646 states have (on average 1.001547987616099) internal successors, (647), 646 states have internal predecessors, (647), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:21:36,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 651 transitions. [2022-03-18 17:21:36,125 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 651 transitions. Word has length 330 [2022-03-18 17:21:36,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:21:36,125 INFO L478 AbstractCegarLoop]: Abstraction has 651 states and 651 transitions. [2022-03-18 17:21:36,126 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 327 states, 327 states have (on average 1.996941896024465) internal successors, (653), 326 states have internal predecessors, (653), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:21:36,126 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 651 transitions. [2022-03-18 17:21:36,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 651 [2022-03-18 17:21:36,134 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:21:36,134 INFO L500 BasicCegarLoop]: trace histogram [319, 319, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:21:36,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-18 17:21:36,355 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:21:36,356 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:21:36,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:21:36,356 INFO L85 PathProgramCache]: Analyzing trace with hash 743680736, now seen corresponding path program 8 times [2022-03-18 17:21:36,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:21:36,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942659809] [2022-03-18 17:21:36,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:21:36,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:21:38,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:22:10,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:22:10,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:22:10,054 INFO L134 CoverageAnalysis]: Checked inductivity of 101761 backedges. 0 proven. 101761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 17:22:10,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:22:10,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942659809] [2022-03-18 17:22:10,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942659809] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 17:22:10,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221951005] [2022-03-18 17:22:10,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 17:22:10,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:22:10,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 17:22:10,056 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 17:22:10,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-18 17:22:26,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 17:22:26,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 17:22:38,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 322 conjunts are in the unsatisfiable core [2022-03-18 17:22:38,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 17:22:39,833 INFO L134 CoverageAnalysis]: Checked inductivity of 101761 backedges. 0 proven. 101761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 17:22:39,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 17:24:17,078 INFO L134 CoverageAnalysis]: Checked inductivity of 101761 backedges. 0 proven. 101761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 17:24:17,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221951005] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 17:24:17,078 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 17:24:17,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [324, 323, 323] total 647 [2022-03-18 17:24:17,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187612497] [2022-03-18 17:24:17,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 17:24:17,080 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 647 states [2022-03-18 17:24:17,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:24:17,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 647 interpolants. [2022-03-18 17:24:17,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154421, Invalid=263541, Unknown=0, NotChecked=0, Total=417962 [2022-03-18 17:24:17,110 INFO L87 Difference]: Start difference. First operand 651 states and 651 transitions. Second operand has 647 states, 647 states have (on average 1.998454404945904) internal successors, (1293), 646 states have internal predecessors, (1293), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)