/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-lit/gr2006.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 15:01:19,150 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 15:01:19,161 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 15:01:19,205 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-17 15:01:19,224 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 15:01:19,224 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 15:01:19,225 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 15:01:19,226 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 15:01:19,226 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 15:01:19,227 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 15:01:19,228 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 15:01:19,229 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 15:01:19,230 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 15:01:19,230 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 15:01:19,231 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 15:01:19,232 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 15:01:19,232 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 15:01:19,234 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-17 15:01:19,239 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 15:01:19,240 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 15:01:19,242 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 15:01:19,242 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-17 15:01:19,248 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 15:01:19,248 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 15:01:19,249 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 15:01:19,249 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-17 15:01:19,249 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 15:01:19,249 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-17 15:01:19,249 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 15:01:19,249 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 15:01:19,249 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 15:01:19,250 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 15:01:19,250 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-17 15:01:19,250 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 15:01:19,250 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 15:01:19,250 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 15:01:19,250 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 15:01:19,250 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 15:01:19,250 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-17 15:01:19,250 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 15:01:19,251 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 15:01:19,251 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 15:01:19,251 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 15:01:19,251 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 15:01:19,251 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 15:01:19,442 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 15:01:19,456 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 15:01:19,457 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 15:01:19,458 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 15:01:19,458 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 15:01:19,459 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gr2006.i [2022-03-17 15:01:19,512 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d069ffc8/9fcdf53258b94edbb8ec7328eff5195d/FLAG596e44506 [2022-03-17 15:01:19,827 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 15:01:19,828 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gr2006.i [2022-03-17 15:01:19,831 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d069ffc8/9fcdf53258b94edbb8ec7328eff5195d/FLAG596e44506 [2022-03-17 15:01:20,276 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d069ffc8/9fcdf53258b94edbb8ec7328eff5195d [2022-03-17 15:01:20,279 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 15:01:20,280 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 15:01:20,282 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 15:01:20,282 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 15:01:20,287 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 15:01:20,287 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 03:01:20" (1/1) ... [2022-03-17 15:01:20,288 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@780774a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:01:20, skipping insertion in model container [2022-03-17 15:01:20,288 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 03:01:20" (1/1) ... [2022-03-17 15:01:20,292 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 15:01:20,304 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 15:01:20,458 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gr2006.i[895,908] [2022-03-17 15:01:20,464 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 15:01:20,471 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 15:01:20,479 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-lit/gr2006.i[895,908] [2022-03-17 15:01:20,481 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 15:01:20,488 INFO L208 MainTranslator]: Completed translation [2022-03-17 15:01:20,489 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:01:20 WrapperNode [2022-03-17 15:01:20,489 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 15:01:20,489 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 15:01:20,489 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 15:01:20,489 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 15:01:20,496 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:01:20" (1/1) ... [2022-03-17 15:01:20,496 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:01:20" (1/1) ... [2022-03-17 15:01:20,499 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:01:20" (1/1) ... [2022-03-17 15:01:20,499 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:01:20" (1/1) ... [2022-03-17 15:01:20,502 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:01:20" (1/1) ... [2022-03-17 15:01:20,504 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:01:20" (1/1) ... [2022-03-17 15:01:20,504 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:01:20" (1/1) ... [2022-03-17 15:01:20,505 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 15:01:20,506 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 15:01:20,506 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 15:01:20,506 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 15:01:20,506 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:01:20" (1/1) ... [2022-03-17 15:01:20,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 15:01:20,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:01:20,529 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) [2022-03-17 15:01:20,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 15:01:20,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 15:01:20,554 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 15:01:20,555 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-17 15:01:20,555 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 15:01:20,555 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 15:01:20,555 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 15:01:20,555 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 15:01:20,556 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-17 15:01:20,556 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-17 15:01:20,556 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 15:01:20,556 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 15:01:20,544 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 [2022-03-17 15:01:20,556 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-17 15:01:20,557 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 15:01:20,557 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-17 15:01:20,557 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 15:01:20,557 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 15:01:20,557 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 15:01:20,557 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 15:01:20,557 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 15:01:20,557 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 15:01:20,557 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 15:01:20,603 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 15:01:20,604 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 15:01:20,684 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 15:01:20,687 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 15:01:20,687 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-17 15:01:20,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 03:01:20 BoogieIcfgContainer [2022-03-17 15:01:20,689 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 15:01:20,689 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 15:01:20,689 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 15:01:20,690 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 15:01:20,692 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 03:01:20" (1/1) ... [2022-03-17 15:01:20,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 03:01:20 BasicIcfg [2022-03-17 15:01:20,703 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 15:01:20,712 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 15:01:20,713 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 15:01:20,715 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 15:01:20,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 03:01:20" (1/4) ... [2022-03-17 15:01:20,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e3c89e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 03:01:20, skipping insertion in model container [2022-03-17 15:01:20,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:01:20" (2/4) ... [2022-03-17 15:01:20,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e3c89e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 03:01:20, skipping insertion in model container [2022-03-17 15:01:20,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 03:01:20" (3/4) ... [2022-03-17 15:01:20,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e3c89e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 03:01:20, skipping insertion in model container [2022-03-17 15:01:20,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 03:01:20" (4/4) ... [2022-03-17 15:01:20,717 INFO L111 eAbstractionObserver]: Analyzing ICFG gr2006.iJordan [2022-03-17 15:01:20,722 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-17 15:01:20,722 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 15:01:20,752 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 15:01:20,756 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 [2022-03-17 15:01:20,757 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 15:01:20,764 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 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) [2022-03-17 15:01:20,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-17 15:01:20,768 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:01:20,769 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:01:20,769 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:01:20,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:01:20,772 INFO L85 PathProgramCache]: Analyzing trace with hash -27272427, now seen corresponding path program 1 times [2022-03-17 15:01:20,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:01:20,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452351351] [2022-03-17 15:01:20,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:01:20,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:01:20,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:01:20,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:01:20,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:01:20,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:01:20,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:01:20,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452351351] [2022-03-17 15:01:20,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452351351] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 15:01:20,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 15:01:20,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 15:01:20,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705995292] [2022-03-17 15:01:20,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:01:20,874 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 15:01:20,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:01:20,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 15:01:20,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 15:01:20,892 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 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 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:01:20,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:01:20,921 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2022-03-17 15:01:20,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 15:01:20,923 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-17 15:01:20,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:01:20,927 INFO L225 Difference]: With dead ends: 21 [2022-03-17 15:01:20,927 INFO L226 Difference]: Without dead ends: 14 [2022-03-17 15:01:20,928 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 [2022-03-17 15:01:20,930 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 [2022-03-17 15:01:20,931 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] [2022-03-17 15:01:20,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-03-17 15:01:20,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-03-17 15:01:20,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 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) [2022-03-17 15:01:20,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-03-17 15:01:20,950 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2022-03-17 15:01:20,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:01:20,950 INFO L478 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-03-17 15:01:20,950 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:01:20,950 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-03-17 15:01:20,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-17 15:01:20,951 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:01:20,951 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:01:20,951 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 15:01:20,951 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:01:20,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:01:20,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1365319963, now seen corresponding path program 1 times [2022-03-17 15:01:20,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:01:20,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103458317] [2022-03-17 15:01:20,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:01:20,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:01:20,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:01:20,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:01:20,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:01:20,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:01:20,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:01:20,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103458317] [2022-03-17 15:01:20,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103458317] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 15:01:20,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 15:01:20,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 15:01:20,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847175991] [2022-03-17 15:01:20,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:01:20,999 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 15:01:20,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:01:21,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 15:01:21,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 15:01:21,000 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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) [2022-03-17 15:01:21,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:01:21,038 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2022-03-17 15:01:21,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 15:01:21,039 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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 13 [2022-03-17 15:01:21,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:01:21,040 INFO L225 Difference]: With dead ends: 19 [2022-03-17 15:01:21,040 INFO L226 Difference]: Without dead ends: 19 [2022-03-17 15:01:21,041 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-17 15:01:21,042 INFO L912 BasicCegarLoop]: 13 mSDtfsCounter, 14 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 15:01:21,042 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 25 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 15:01:21,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-03-17 15:01:21,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2022-03-17 15:01:21,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 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) [2022-03-17 15:01:21,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-03-17 15:01:21,048 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2022-03-17 15:01:21,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:01:21,049 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-03-17 15:01:21,051 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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) [2022-03-17 15:01:21,052 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-03-17 15:01:21,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-17 15:01:21,055 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:01:21,055 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:01:21,056 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-17 15:01:21,056 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:01:21,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:01:21,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1393949114, now seen corresponding path program 1 times [2022-03-17 15:01:21,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:01:21,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490106536] [2022-03-17 15:01:21,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:01:21,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:01:21,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:01:21,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:01:21,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:01:21,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:01:21,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:01:21,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490106536] [2022-03-17 15:01:21,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490106536] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 15:01:21,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 15:01:21,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 15:01:21,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302956294] [2022-03-17 15:01:21,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:01:21,121 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 15:01:21,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:01:21,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 15:01:21,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 15:01:21,122 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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) [2022-03-17 15:01:21,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:01:21,144 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2022-03-17 15:01:21,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 15:01:21,144 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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 13 [2022-03-17 15:01:21,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:01:21,145 INFO L225 Difference]: With dead ends: 20 [2022-03-17 15:01:21,145 INFO L226 Difference]: Without dead ends: 20 [2022-03-17 15:01:21,145 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 15:01:21,146 INFO L912 BasicCegarLoop]: 13 mSDtfsCounter, 12 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 15:01:21,146 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 20 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 15:01:21,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-03-17 15:01:21,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2022-03-17 15:01:21,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 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) [2022-03-17 15:01:21,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-03-17 15:01:21,149 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 13 [2022-03-17 15:01:21,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:01:21,149 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-03-17 15:01:21,149 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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) [2022-03-17 15:01:21,149 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-03-17 15:01:21,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-17 15:01:21,149 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:01:21,150 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:01:21,150 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-17 15:01:21,150 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:01:21,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:01:21,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1701781083, now seen corresponding path program 1 times [2022-03-17 15:01:21,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:01:21,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400570498] [2022-03-17 15:01:21,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:01:21,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:01:21,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:01:21,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:01:21,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:01:21,188 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:01:21,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:01:21,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400570498] [2022-03-17 15:01:21,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400570498] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:01:21,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520699993] [2022-03-17 15:01:21,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:01:21,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:01:21,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:01:21,190 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) [2022-03-17 15:01:21,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-17 15:01:21,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:01:21,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-17 15:01:21,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:01:21,290 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:01:21,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:01:21,351 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:01:21,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520699993] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 15:01:21,352 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 15:01:21,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-17 15:01:21,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380830362] [2022-03-17 15:01:21,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 15:01:21,353 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-17 15:01:21,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:01:21,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-17 15:01:21,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-17 15:01:21,357 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 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) [2022-03-17 15:01:21,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:01:21,428 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2022-03-17 15:01:21,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-17 15:01:21,429 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 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 16 [2022-03-17 15:01:21,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:01:21,430 INFO L225 Difference]: With dead ends: 30 [2022-03-17 15:01:21,430 INFO L226 Difference]: Without dead ends: 30 [2022-03-17 15:01:21,431 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-03-17 15:01:21,438 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 24 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 15:01:21,439 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 27 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 15:01:21,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-17 15:01:21,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2022-03-17 15:01:21,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 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) [2022-03-17 15:01:21,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-03-17 15:01:21,448 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 16 [2022-03-17 15:01:21,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:01:21,449 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-03-17 15:01:21,449 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 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) [2022-03-17 15:01:21,449 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-03-17 15:01:21,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-17 15:01:21,450 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:01:21,450 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:01:21,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-17 15:01:21,659 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:01:21,660 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:01:21,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:01:21,660 INFO L85 PathProgramCache]: Analyzing trace with hash -508194182, now seen corresponding path program 2 times [2022-03-17 15:01:21,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:01:21,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177923137] [2022-03-17 15:01:21,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:01:21,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:01:21,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:01:21,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:01:21,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:01:21,716 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:01:21,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:01:21,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177923137] [2022-03-17 15:01:21,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177923137] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:01:21,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380255539] [2022-03-17 15:01:21,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 15:01:21,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:01:21,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:01:21,730 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) [2022-03-17 15:01:21,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-17 15:01:21,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 15:01:21,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 15:01:21,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-17 15:01:21,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:01:21,871 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-17 15:01:21,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:01:21,930 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-17 15:01:21,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380255539] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 15:01:21,931 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 15:01:21,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 10 [2022-03-17 15:01:21,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669065191] [2022-03-17 15:01:21,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 15:01:21,931 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-17 15:01:21,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:01:21,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-17 15:01:21,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-17 15:01:21,932 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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) [2022-03-17 15:01:22,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:01:22,039 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2022-03-17 15:01:22,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-17 15:01:22,040 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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 25 [2022-03-17 15:01:22,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:01:22,040 INFO L225 Difference]: With dead ends: 36 [2022-03-17 15:01:22,040 INFO L226 Difference]: Without dead ends: 36 [2022-03-17 15:01:22,040 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=109, Invalid=197, Unknown=0, NotChecked=0, Total=306 [2022-03-17 15:01:22,041 INFO L912 BasicCegarLoop]: 13 mSDtfsCounter, 15 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 15:01:22,041 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 45 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 15:01:22,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-17 15:01:22,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2022-03-17 15:01:22,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 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) [2022-03-17 15:01:22,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2022-03-17 15:01:22,044 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 25 [2022-03-17 15:01:22,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:01:22,044 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2022-03-17 15:01:22,044 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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) [2022-03-17 15:01:22,044 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2022-03-17 15:01:22,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-17 15:01:22,045 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:01:22,045 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:01:22,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-17 15:01:22,266 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:01:22,266 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:01:22,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:01:22,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1754997211, now seen corresponding path program 3 times [2022-03-17 15:01:22,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:01:22,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284091870] [2022-03-17 15:01:22,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:01:22,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:01:22,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:01:22,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:01:22,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:01:22,332 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 22 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-17 15:01:22,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:01:22,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284091870] [2022-03-17 15:01:22,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284091870] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:01:22,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015224987] [2022-03-17 15:01:22,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 15:01:22,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:01:22,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:01:22,334 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) [2022-03-17 15:01:22,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-17 15:01:22,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-17 15:01:22,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 15:01:22,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-17 15:01:22,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:01:22,450 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 45 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 15:01:22,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:01:22,502 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 45 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 15:01:22,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015224987] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 15:01:22,503 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 15:01:22,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 12 [2022-03-17 15:01:22,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798913461] [2022-03-17 15:01:22,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 15:01:22,503 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-17 15:01:22,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:01:22,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-17 15:01:22,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-03-17 15:01:22,504 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 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) [2022-03-17 15:01:22,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:01:22,639 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2022-03-17 15:01:22,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-17 15:01:22,639 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 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 31 [2022-03-17 15:01:22,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:01:22,640 INFO L225 Difference]: With dead ends: 43 [2022-03-17 15:01:22,640 INFO L226 Difference]: Without dead ends: 43 [2022-03-17 15:01:22,640 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2022-03-17 15:01:22,641 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 18 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 15:01:22,641 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 26 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 15:01:22,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-17 15:01:22,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2022-03-17 15:01:22,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.121212121212121) internal successors, (37), 33 states have internal predecessors, (37), 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) [2022-03-17 15:01:22,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2022-03-17 15:01:22,643 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 31 [2022-03-17 15:01:22,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:01:22,644 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2022-03-17 15:01:22,644 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 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) [2022-03-17 15:01:22,644 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2022-03-17 15:01:22,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-17 15:01:22,644 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:01:22,644 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:01:22,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-17 15:01:22,851 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:01:22,852 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:01:22,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:01:22,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1007935590, now seen corresponding path program 4 times [2022-03-17 15:01:22,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:01:22,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708669990] [2022-03-17 15:01:22,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:01:22,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:01:22,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:01:22,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:01:22,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:01:22,917 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 46 proven. 57 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-17 15:01:22,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:01:22,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708669990] [2022-03-17 15:01:22,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708669990] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:01:22,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380552143] [2022-03-17 15:01:22,917 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-17 15:01:22,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:01:22,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:01:22,920 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) [2022-03-17 15:01:22,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-17 15:01:22,954 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-17 15:01:22,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 15:01:22,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-17 15:01:22,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:01:23,012 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 46 proven. 57 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-17 15:01:23,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:01:23,117 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 46 proven. 57 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-17 15:01:23,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380552143] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 15:01:23,118 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 15:01:23,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-03-17 15:01:23,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038004151] [2022-03-17 15:01:23,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 15:01:23,118 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-17 15:01:23,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:01:23,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-17 15:01:23,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-03-17 15:01:23,119 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 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) [2022-03-17 15:01:23,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:01:23,286 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2022-03-17 15:01:23,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-17 15:01:23,287 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 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 37 [2022-03-17 15:01:23,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:01:23,287 INFO L225 Difference]: With dead ends: 63 [2022-03-17 15:01:23,287 INFO L226 Difference]: Without dead ends: 63 [2022-03-17 15:01:23,288 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=377, Invalid=615, Unknown=0, NotChecked=0, Total=992 [2022-03-17 15:01:23,288 INFO L912 BasicCegarLoop]: 13 mSDtfsCounter, 58 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 15:01:23,288 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 35 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 15:01:23,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-17 15:01:23,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2022-03-17 15:01:23,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 57 states have internal predecessors, (61), 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) [2022-03-17 15:01:23,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2022-03-17 15:01:23,292 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 37 [2022-03-17 15:01:23,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:01:23,292 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2022-03-17 15:01:23,292 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 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) [2022-03-17 15:01:23,292 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2022-03-17 15:01:23,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-17 15:01:23,293 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:01:23,293 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 14, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:01:23,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-17 15:01:23,507 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:01:23,507 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:01:23,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:01:23,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1175433498, now seen corresponding path program 5 times [2022-03-17 15:01:23,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:01:23,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790009019] [2022-03-17 15:01:23,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:01:23,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:01:23,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:01:23,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:01:23,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:01:23,690 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 102 proven. 301 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-17 15:01:23,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:01:23,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790009019] [2022-03-17 15:01:23,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790009019] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:01:23,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985633008] [2022-03-17 15:01:23,691 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-17 15:01:23,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:01:23,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:01:23,692 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) [2022-03-17 15:01:23,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-17 15:01:23,734 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2022-03-17 15:01:23,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 15:01:23,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-17 15:01:23,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:01:23,827 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 102 proven. 301 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-17 15:01:23,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:01:24,164 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 102 proven. 301 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-17 15:01:24,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985633008] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 15:01:24,165 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 15:01:24,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 34 [2022-03-17 15:01:24,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390984705] [2022-03-17 15:01:24,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 15:01:24,166 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-17 15:01:24,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:01:24,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-17 15:01:24,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2022-03-17 15:01:24,168 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand has 34 states, 34 states have (on average 3.0588235294117645) internal successors, (104), 33 states have internal predecessors, (104), 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) [2022-03-17 15:01:24,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:01:24,630 INFO L93 Difference]: Finished difference Result 111 states and 114 transitions. [2022-03-17 15:01:24,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-17 15:01:24,631 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.0588235294117645) internal successors, (104), 33 states have internal predecessors, (104), 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 61 [2022-03-17 15:01:24,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:01:24,631 INFO L225 Difference]: With dead ends: 111 [2022-03-17 15:01:24,632 INFO L226 Difference]: Without dead ends: 111 [2022-03-17 15:01:24,634 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1521, Invalid=2511, Unknown=0, NotChecked=0, Total=4032 [2022-03-17 15:01:24,634 INFO L912 BasicCegarLoop]: 13 mSDtfsCounter, 99 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 15:01:24,634 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 35 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 15:01:24,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-03-17 15:01:24,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2022-03-17 15:01:24,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 105 states have (on average 1.0380952380952382) internal successors, (109), 105 states have internal predecessors, (109), 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) [2022-03-17 15:01:24,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 113 transitions. [2022-03-17 15:01:24,639 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 113 transitions. Word has length 61 [2022-03-17 15:01:24,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:01:24,639 INFO L478 AbstractCegarLoop]: Abstraction has 110 states and 113 transitions. [2022-03-17 15:01:24,639 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.0588235294117645) internal successors, (104), 33 states have internal predecessors, (104), 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) [2022-03-17 15:01:24,639 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 113 transitions. [2022-03-17 15:01:24,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-03-17 15:01:24,640 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:01:24,640 INFO L500 BasicCegarLoop]: trace histogram [33, 32, 30, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:01:24,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-17 15:01:24,858 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:01:24,858 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:01:24,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:01:24,859 INFO L85 PathProgramCache]: Analyzing trace with hash 136401946, now seen corresponding path program 6 times [2022-03-17 15:01:24,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:01:24,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368720225] [2022-03-17 15:01:24,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:01:24,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:01:24,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:01:25,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:01:25,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:01:25,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1584 backedges. 214 proven. 1365 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-17 15:01:25,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:01:25,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368720225] [2022-03-17 15:01:25,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368720225] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:01:25,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777724211] [2022-03-17 15:01:25,274 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-17 15:01:25,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:01:25,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:01:25,276 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) [2022-03-17 15:01:25,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-17 15:01:25,328 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2022-03-17 15:01:25,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 15:01:25,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-17 15:01:25,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:01:25,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1584 backedges. 508 proven. 17 refuted. 0 times theorem prover too weak. 1059 trivial. 0 not checked. [2022-03-17 15:01:25,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:01:25,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1584 backedges. 508 proven. 17 refuted. 0 times theorem prover too weak. 1059 trivial. 0 not checked. [2022-03-17 15:01:25,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777724211] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 15:01:25,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 15:01:25,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 6, 6] total 38 [2022-03-17 15:01:25,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672903418] [2022-03-17 15:01:25,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 15:01:25,637 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-17 15:01:25,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:01:25,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-17 15:01:25,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=544, Invalid=862, Unknown=0, NotChecked=0, Total=1406 [2022-03-17 15:01:25,638 INFO L87 Difference]: Start difference. First operand 110 states and 113 transitions. Second operand has 38 states, 38 states have (on average 3.210526315789474) internal successors, (122), 37 states have internal predecessors, (122), 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) [2022-03-17 15:01:26,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:01:26,338 INFO L93 Difference]: Finished difference Result 124 states and 130 transitions. [2022-03-17 15:01:26,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-17 15:01:26,338 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.210526315789474) internal successors, (122), 37 states have internal predecessors, (122), 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 109 [2022-03-17 15:01:26,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:01:26,339 INFO L225 Difference]: With dead ends: 124 [2022-03-17 15:01:26,339 INFO L226 Difference]: Without dead ends: 124 [2022-03-17 15:01:26,340 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 217 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1925, Invalid=3775, Unknown=0, NotChecked=0, Total=5700 [2022-03-17 15:01:26,340 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 45 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 15:01:26,341 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 32 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 15:01:26,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-03-17 15:01:26,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 116. [2022-03-17 15:01:26,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 111 states have (on average 1.045045045045045) internal successors, (116), 111 states have internal predecessors, (116), 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) [2022-03-17 15:01:26,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 120 transitions. [2022-03-17 15:01:26,345 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 120 transitions. Word has length 109 [2022-03-17 15:01:26,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:01:26,345 INFO L478 AbstractCegarLoop]: Abstraction has 116 states and 120 transitions. [2022-03-17 15:01:26,345 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.210526315789474) internal successors, (122), 37 states have internal predecessors, (122), 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) [2022-03-17 15:01:26,345 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 120 transitions. [2022-03-17 15:01:26,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-17 15:01:26,346 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:01:26,346 INFO L500 BasicCegarLoop]: trace histogram [35, 34, 31, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:01:26,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-17 15:01:26,562 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:01:26,563 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:01:26,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:01:26,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1200165189, now seen corresponding path program 7 times [2022-03-17 15:01:26,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:01:26,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370543611] [2022-03-17 15:01:26,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:01:26,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:01:26,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:01:26,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:01:26,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:01:26,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1785 backedges. 316 proven. 1457 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 15:01:26,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:01:26,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370543611] [2022-03-17 15:01:26,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370543611] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:01:26,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878191137] [2022-03-17 15:01:26,953 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-17 15:01:26,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:01:26,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:01:26,954 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) [2022-03-17 15:01:26,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-17 15:01:27,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:01:27,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-17 15:01:27,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:01:27,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1785 backedges. 316 proven. 1457 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 15:01:27,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:01:27,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1785 backedges. 316 proven. 1457 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 15:01:27,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878191137] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 15:01:27,895 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 15:01:27,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 54 [2022-03-17 15:01:27,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695185493] [2022-03-17 15:01:27,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 15:01:27,896 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-03-17 15:01:27,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:01:27,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-03-17 15:01:27,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-03-17 15:01:27,897 INFO L87 Difference]: Start difference. First operand 116 states and 120 transitions. Second operand has 54 states, 54 states have (on average 3.074074074074074) internal successors, (166), 53 states have internal predecessors, (166), 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) [2022-03-17 15:01:28,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:01:28,899 INFO L93 Difference]: Finished difference Result 175 states and 179 transitions. [2022-03-17 15:01:28,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-17 15:01:28,900 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.074074074074074) internal successors, (166), 53 states have internal predecessors, (166), 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 115 [2022-03-17 15:01:28,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:01:28,901 INFO L225 Difference]: With dead ends: 175 [2022-03-17 15:01:28,901 INFO L226 Difference]: Without dead ends: 175 [2022-03-17 15:01:28,903 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 212 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1556 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=4031, Invalid=6681, Unknown=0, NotChecked=0, Total=10712 [2022-03-17 15:01:28,903 INFO L912 BasicCegarLoop]: 13 mSDtfsCounter, 159 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 15:01:28,904 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 30 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 15:01:28,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-03-17 15:01:28,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 173. [2022-03-17 15:01:28,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 168 states have (on average 1.0297619047619047) internal successors, (173), 168 states have internal predecessors, (173), 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) [2022-03-17 15:01:28,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 177 transitions. [2022-03-17 15:01:28,915 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 177 transitions. Word has length 115 [2022-03-17 15:01:28,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:01:28,915 INFO L478 AbstractCegarLoop]: Abstraction has 173 states and 177 transitions. [2022-03-17 15:01:28,918 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.074074074074074) internal successors, (166), 53 states have internal predecessors, (166), 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) [2022-03-17 15:01:28,918 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 177 transitions. [2022-03-17 15:01:28,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-03-17 15:01:28,919 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:01:28,919 INFO L500 BasicCegarLoop]: trace histogram [54, 53, 50, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:01:28,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-17 15:01:29,120 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:01:29,120 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:01:29,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:01:29,120 INFO L85 PathProgramCache]: Analyzing trace with hash 2079146812, now seen corresponding path program 8 times [2022-03-17 15:01:29,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:01:29,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460675560] [2022-03-17 15:01:29,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:01:29,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:01:29,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:01:29,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:01:29,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:01:29,209 INFO L134 CoverageAnalysis]: Checked inductivity of 4293 backedges. 1145 proven. 34 refuted. 0 times theorem prover too weak. 3114 trivial. 0 not checked. [2022-03-17 15:01:29,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:01:29,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460675560] [2022-03-17 15:01:29,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460675560] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:01:29,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772891034] [2022-03-17 15:01:29,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 15:01:29,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:01:29,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:01:29,210 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) [2022-03-17 15:01:29,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-17 15:01:29,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 15:01:29,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 15:01:29,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 56 conjunts are in the unsatisfiable core [2022-03-17 15:01:29,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:01:30,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4293 backedges. 4249 proven. 34 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-17 15:01:30,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:01:31,326 INFO L134 CoverageAnalysis]: Checked inductivity of 4293 backedges. 4249 proven. 34 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-17 15:01:31,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772891034] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 15:01:31,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 15:01:31,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 53, 53] total 100 [2022-03-17 15:01:31,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893573655] [2022-03-17 15:01:31,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 15:01:31,327 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-03-17 15:01:31,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:01:31,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-03-17 15:01:31,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2022-03-17 15:01:31,330 INFO L87 Difference]: Start difference. First operand 173 states and 177 transitions. Second operand has 100 states, 100 states have (on average 3.12) internal successors, (312), 99 states have internal predecessors, (312), 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) [2022-03-17 15:01:32,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:01:32,428 INFO L93 Difference]: Finished difference Result 784 states and 976 transitions. [2022-03-17 15:01:32,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-17 15:01:32,428 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 3.12) internal successors, (312), 99 states have internal predecessors, (312), 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 172 [2022-03-17 15:01:32,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:01:32,431 INFO L225 Difference]: With dead ends: 784 [2022-03-17 15:01:32,431 INFO L226 Difference]: Without dead ends: 784 [2022-03-17 15:01:32,436 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 307 SyntacticMatches, 1 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6030 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=10053, Invalid=12899, Unknown=0, NotChecked=0, Total=22952 [2022-03-17 15:01:32,436 INFO L912 BasicCegarLoop]: 61 mSDtfsCounter, 16 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 304 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 304 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-17 15:01:32,436 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 88 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [304 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-17 15:01:32,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2022-03-17 15:01:32,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 314. [2022-03-17 15:01:32,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 309 states have (on average 1.168284789644013) internal successors, (361), 309 states have internal predecessors, (361), 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) [2022-03-17 15:01:32,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 365 transitions. [2022-03-17 15:01:32,457 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 365 transitions. Word has length 172 [2022-03-17 15:01:32,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:01:32,457 INFO L478 AbstractCegarLoop]: Abstraction has 314 states and 365 transitions. [2022-03-17 15:01:32,458 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 3.12) internal successors, (312), 99 states have internal predecessors, (312), 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) [2022-03-17 15:01:32,458 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 365 transitions. [2022-03-17 15:01:32,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2022-03-17 15:01:32,460 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:01:32,461 INFO L500 BasicCegarLoop]: trace histogram [101, 100, 51, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:01:32,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-17 15:01:32,677 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-17 15:01:32,677 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:01:32,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:01:32,678 INFO L85 PathProgramCache]: Analyzing trace with hash 727187930, now seen corresponding path program 9 times [2022-03-17 15:01:32,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:01:32,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055745857] [2022-03-17 15:01:32,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:01:32,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:01:32,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:01:35,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:01:35,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:01:35,450 INFO L134 CoverageAnalysis]: Checked inductivity of 15150 backedges. 0 proven. 15150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:01:35,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:01:35,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055745857] [2022-03-17 15:01:35,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055745857] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:01:35,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216277850] [2022-03-17 15:01:35,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 15:01:35,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:01:35,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:01:35,452 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:01:35,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-17 15:01:35,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 77 check-sat command(s) [2022-03-17 15:01:35,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 15:01:35,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 106 conjunts are in the unsatisfiable core [2022-03-17 15:01:35,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:01:36,519 INFO L134 CoverageAnalysis]: Checked inductivity of 15150 backedges. 7648 proven. 3876 refuted. 0 times theorem prover too weak. 3626 trivial. 0 not checked. [2022-03-17 15:01:36,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:01:37,254 INFO L134 CoverageAnalysis]: Checked inductivity of 15150 backedges. 7648 proven. 3876 refuted. 0 times theorem prover too weak. 3626 trivial. 0 not checked. [2022-03-17 15:01:37,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216277850] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 15:01:37,254 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 15:01:37,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 57, 57] total 109 [2022-03-17 15:01:37,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588155654] [2022-03-17 15:01:37,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 15:01:37,256 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-03-17 15:01:37,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:01:37,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-03-17 15:01:37,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1493, Invalid=10279, Unknown=0, NotChecked=0, Total=11772 [2022-03-17 15:01:37,258 INFO L87 Difference]: Start difference. First operand 314 states and 365 transitions. Second operand has 109 states, 109 states have (on average 2.908256880733945) internal successors, (317), 106 states have internal predecessors, (317), 2 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) [2022-03-17 15:01:45,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:01:45,356 INFO L93 Difference]: Finished difference Result 4240 states and 4340 transitions. [2022-03-17 15:01:45,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-03-17 15:01:45,365 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.908256880733945) internal successors, (317), 106 states have internal predecessors, (317), 2 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 313 [2022-03-17 15:01:45,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:01:45,374 INFO L225 Difference]: With dead ends: 4240 [2022-03-17 15:01:45,374 INFO L226 Difference]: Without dead ends: 4237 [2022-03-17 15:01:45,376 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 887 GetRequests, 670 SyntacticMatches, 6 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8723 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=4466, Invalid=40690, Unknown=0, NotChecked=0, Total=45156 [2022-03-17 15:01:45,376 INFO L912 BasicCegarLoop]: 159 mSDtfsCounter, 316 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 15829 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 15988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 15829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-03-17 15:01:45,376 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [316 Valid, 466 Invalid, 15988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 15829 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-03-17 15:01:45,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4237 states. [2022-03-17 15:01:45,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4237 to 4188. [2022-03-17 15:01:45,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4188 states, 4183 states have (on average 1.0241453502271098) internal successors, (4284), 4183 states have internal predecessors, (4284), 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) [2022-03-17 15:01:45,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4188 states to 4188 states and 4288 transitions. [2022-03-17 15:01:45,422 INFO L78 Accepts]: Start accepts. Automaton has 4188 states and 4288 transitions. Word has length 313 [2022-03-17 15:01:45,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:01:45,422 INFO L478 AbstractCegarLoop]: Abstraction has 4188 states and 4288 transitions. [2022-03-17 15:01:45,423 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 2.908256880733945) internal successors, (317), 106 states have internal predecessors, (317), 2 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) [2022-03-17 15:01:45,423 INFO L276 IsEmpty]: Start isEmpty. Operand 4188 states and 4288 transitions. [2022-03-17 15:01:45,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2022-03-17 15:01:45,425 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:01:45,425 INFO L500 BasicCegarLoop]: trace histogram [102, 101, 52, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:01:45,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-17 15:01:45,642 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:01:45,642 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:01:45,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:01:45,643 INFO L85 PathProgramCache]: Analyzing trace with hash 635638076, now seen corresponding path program 10 times [2022-03-17 15:01:45,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:01:45,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271272939] [2022-03-17 15:01:45,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:01:45,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:01:45,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:01:46,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:01:46,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:01:46,675 INFO L134 CoverageAnalysis]: Checked inductivity of 15453 backedges. 7903 proven. 7403 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-03-17 15:01:46,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:01:46,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271272939] [2022-03-17 15:01:46,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271272939] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:01:46,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538360585] [2022-03-17 15:01:46,675 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-17 15:01:46,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:01:46,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:01:46,676 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:01:46,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-17 15:01:46,780 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-17 15:01:46,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 15:01:46,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 760 conjuncts, 103 conjunts are in the unsatisfiable core [2022-03-17 15:01:46,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:01:47,220 INFO L134 CoverageAnalysis]: Checked inductivity of 15453 backedges. 7903 proven. 7401 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-03-17 15:01:47,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:01:47,750 INFO L134 CoverageAnalysis]: Checked inductivity of 15453 backedges. 7903 proven. 7401 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-03-17 15:01:47,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538360585] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 15:01:47,750 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 15:01:47,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 54, 54] total 56 [2022-03-17 15:01:47,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378022772] [2022-03-17 15:01:47,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 15:01:47,751 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-03-17 15:01:47,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:01:47,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-03-17 15:01:47,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1486, Invalid=1594, Unknown=0, NotChecked=0, Total=3080 [2022-03-17 15:01:47,752 INFO L87 Difference]: Start difference. First operand 4188 states and 4288 transitions. Second operand has 56 states, 56 states have (on average 3.875) internal successors, (217), 55 states have internal predecessors, (217), 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) [2022-03-17 15:01:48,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:01:48,946 INFO L93 Difference]: Finished difference Result 4342 states and 4442 transitions. [2022-03-17 15:01:48,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-17 15:01:48,947 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.875) internal successors, (217), 55 states have internal predecessors, (217), 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 316 [2022-03-17 15:01:48,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:01:48,957 INFO L225 Difference]: With dead ends: 4342 [2022-03-17 15:01:48,957 INFO L226 Difference]: Without dead ends: 4191 [2022-03-17 15:01:48,958 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 790 GetRequests, 682 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1825 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4452, Invalid=7320, Unknown=0, NotChecked=0, Total=11772 [2022-03-17 15:01:48,958 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 110 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 15:01:48,958 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 29 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 15:01:48,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4191 states. [2022-03-17 15:01:48,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4191 to 4191. [2022-03-17 15:01:48,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4191 states, 4186 states have (on average 1.0241280458671762) internal successors, (4287), 4186 states have internal predecessors, (4287), 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) [2022-03-17 15:01:49,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4191 states to 4191 states and 4291 transitions. [2022-03-17 15:01:49,003 INFO L78 Accepts]: Start accepts. Automaton has 4191 states and 4291 transitions. Word has length 316 [2022-03-17 15:01:49,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:01:49,004 INFO L478 AbstractCegarLoop]: Abstraction has 4191 states and 4291 transitions. [2022-03-17 15:01:49,004 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.875) internal successors, (217), 55 states have internal predecessors, (217), 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) [2022-03-17 15:01:49,004 INFO L276 IsEmpty]: Start isEmpty. Operand 4191 states and 4291 transitions. [2022-03-17 15:01:49,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2022-03-17 15:01:49,006 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:01:49,006 INFO L500 BasicCegarLoop]: trace histogram [103, 102, 52, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:01:49,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-17 15:01:49,211 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-17 15:01:49,211 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:01:49,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:01:49,212 INFO L85 PathProgramCache]: Analyzing trace with hash 293034619, now seen corresponding path program 11 times [2022-03-17 15:01:49,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:01:49,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593980250] [2022-03-17 15:01:49,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:01:49,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:01:49,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:01:50,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:01:50,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:01:50,113 INFO L134 CoverageAnalysis]: Checked inductivity of 15759 backedges. 11580 proven. 149 refuted. 0 times theorem prover too weak. 4030 trivial. 0 not checked. [2022-03-17 15:01:50,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:01:50,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593980250] [2022-03-17 15:01:50,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593980250] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:01:50,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219845070] [2022-03-17 15:01:50,113 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-17 15:01:50,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:01:50,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:01:50,114 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:01:50,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-17 15:01:50,284 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 103 check-sat command(s) [2022-03-17 15:01:50,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 15:01:50,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 767 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-17 15:01:50,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:01:50,669 INFO L134 CoverageAnalysis]: Checked inductivity of 15759 backedges. 11729 proven. 0 refuted. 0 times theorem prover too weak. 4030 trivial. 0 not checked. [2022-03-17 15:01:50,670 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 15:01:50,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219845070] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 15:01:50,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-17 15:01:50,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [54] total 55 [2022-03-17 15:01:50,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83350689] [2022-03-17 15:01:50,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:01:50,671 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-17 15:01:50,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:01:50,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-17 15:01:50,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1383, Invalid=1587, Unknown=0, NotChecked=0, Total=2970 [2022-03-17 15:01:50,671 INFO L87 Difference]: Start difference. First operand 4191 states and 4291 transitions. Second operand has 53 states, 53 states have (on average 3.056603773584906) internal successors, (162), 53 states have internal predecessors, (162), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:01:50,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:01:50,854 INFO L93 Difference]: Finished difference Result 158 states and 157 transitions. [2022-03-17 15:01:50,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-17 15:01:50,854 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.056603773584906) internal successors, (162), 53 states have internal predecessors, (162), 2 states have call successors, (3), 2 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 319 [2022-03-17 15:01:50,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:01:50,855 INFO L225 Difference]: With dead ends: 158 [2022-03-17 15:01:50,855 INFO L226 Difference]: Without dead ends: 0 [2022-03-17 15:01:50,855 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1383, Invalid=1587, Unknown=0, NotChecked=0, Total=2970 [2022-03-17 15:01:50,855 INFO L912 BasicCegarLoop]: 57 mSDtfsCounter, 0 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 15:01:50,855 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 261 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 15:01:50,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-17 15:01:50,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-17 15:01:50,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-17 15:01:50,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-17 15:01:50,856 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 319 [2022-03-17 15:01:50,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:01:50,856 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-17 15:01:50,856 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.056603773584906) internal successors, (162), 53 states have internal predecessors, (162), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:01:50,856 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-17 15:01:50,856 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-17 15:01:50,858 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-17 15:01:50,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-17 15:01:51,059 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-17 15:01:51,061 INFO L718 BasicCegarLoop]: Path program histogram: [11, 1, 1, 1] [2022-03-17 15:01:51,062 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-17 15:01:51,064 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 03:01:51 BasicIcfg [2022-03-17 15:01:51,064 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-17 15:01:51,064 INFO L158 Benchmark]: Toolchain (without parser) took 30784.42ms. Allocated memory was 192.9MB in the beginning and 253.8MB in the end (delta: 60.8MB). Free memory was 144.7MB in the beginning and 131.6MB in the end (delta: 13.1MB). Peak memory consumption was 74.8MB. Max. memory is 8.0GB. [2022-03-17 15:01:51,064 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 192.9MB. Free memory was 160.9MB in the beginning and 160.7MB in the end (delta: 146.8kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-17 15:01:51,064 INFO L158 Benchmark]: CACSL2BoogieTranslator took 206.88ms. Allocated memory is still 192.9MB. Free memory was 144.5MB in the beginning and 169.9MB in the end (delta: -25.4MB). Peak memory consumption was 11.8MB. Max. memory is 8.0GB. [2022-03-17 15:01:51,064 INFO L158 Benchmark]: Boogie Preprocessor took 16.02ms. Allocated memory is still 192.9MB. Free memory was 169.9MB in the beginning and 168.4MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-17 15:01:51,065 INFO L158 Benchmark]: RCFGBuilder took 182.88ms. Allocated memory is still 192.9MB. Free memory was 168.4MB in the beginning and 158.4MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-17 15:01:51,065 INFO L158 Benchmark]: IcfgTransformer took 13.51ms. Allocated memory is still 192.9MB. Free memory was 158.4MB in the beginning and 157.4MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-17 15:01:51,065 INFO L158 Benchmark]: TraceAbstraction took 30351.24ms. Allocated memory was 192.9MB in the beginning and 253.8MB in the end (delta: 60.8MB). Free memory was 156.9MB in the beginning and 131.6MB in the end (delta: 25.2MB). Peak memory consumption was 87.1MB. Max. memory is 8.0GB. [2022-03-17 15:01:51,066 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 192.9MB. Free memory was 160.9MB in the beginning and 160.7MB in the end (delta: 146.8kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 206.88ms. Allocated memory is still 192.9MB. Free memory was 144.5MB in the beginning and 169.9MB in the end (delta: -25.4MB). Peak memory consumption was 11.8MB. Max. memory is 8.0GB. * Boogie Preprocessor took 16.02ms. Allocated memory is still 192.9MB. Free memory was 169.9MB in the beginning and 168.4MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 182.88ms. Allocated memory is still 192.9MB. Free memory was 168.4MB in the beginning and 158.4MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 13.51ms. Allocated memory is still 192.9MB. Free memory was 158.4MB in the beginning and 157.4MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 30351.24ms. Allocated memory was 192.9MB in the beginning and 253.8MB in the end (delta: 60.8MB). Free memory was 156.9MB in the beginning and 131.6MB in the end (delta: 25.2MB). Peak memory consumption was 87.1MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 30.3s, OverallIterations: 14, TraceHistogramMax: 103, PathProgramHistogramMax: 11, EmptinessCheckTime: 0.0s, AutomataDifference: 13.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 900 SdHoareTripleChecker+Valid, 5.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 899 mSDsluCounter, 1143 SdHoareTripleChecker+Invalid, 4.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 711 mSDsCounter, 898 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 17977 IncrementalHoareTripleChecker+Invalid, 18875 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 898 mSolverCounterUnsat, 432 mSDtfsCounter, 17977 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3595 GetRequests, 2735 SyntacticMatches, 15 SemanticMatches, 845 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20138 ImplicationChecksByTransitivity, 14.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4191occurred in iteration=13, InterpolantAutomatonStates: 459, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 14 MinimizatonAttempts, 545 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 13.0s InterpolantComputationTime, 3065 NumberOfCodeBlocks, 2942 NumberOfCodeBlocksAsserted, 244 NumberOfCheckSat, 4225 ConstructedInterpolants, 0 QuantifiedInterpolants, 12179 SizeOfPredicates, 2 NumberOfNonLiveVariables, 3495 ConjunctsInSsa, 395 ConjunctsInUnsatCore, 35 InterpolantComputations, 4 PerfectInterpolantSequences, 95861/148149 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-03-17 15:01:51,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...