/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/loops-crafted-1/mono-crafted_6.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 13:01:38,197 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 13:01:38,205 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 13:01:38,223 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 13:01:38,230 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 13:01:38,230 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 13:01:38,231 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 13:01:38,232 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 13:01:38,233 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 13:01:38,233 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 13:01:38,234 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 13:01:38,235 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 13:01:38,236 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 13:01:38,237 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 13:01:38,238 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 13:01:38,238 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 13:01:38,240 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 13:01:38,245 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 13:01:38,245 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 13:01:38,246 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 13:01:38,246 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 13:01:38,275 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 13:01:38,275 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 13:01:38,276 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 13:01:38,276 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 13:01:38,276 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 13:01:38,276 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 13:01:38,276 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 13:01:38,276 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 13:01:38,276 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 13:01:38,276 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 13:01:38,277 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 13:01:38,277 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 13:01:38,277 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 13:01:38,277 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 13:01:38,277 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 13:01:38,277 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 13:01:38,277 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 13:01:38,277 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 13:01:38,277 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 13:01:38,277 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 13:01:38,278 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 13:01:38,278 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 13:01:38,278 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 13:01:38,453 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 13:01:38,484 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 13:01:38,486 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 13:01:38,487 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 13:01:38,487 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 13:01:38,488 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_6.c [2022-01-31 13:01:38,532 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c64fcd97f/9aec495de3b54c78826b9f708b8c0545/FLAGffab76a5c [2022-01-31 13:01:38,901 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 13:01:38,902 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_6.c [2022-01-31 13:01:38,906 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c64fcd97f/9aec495de3b54c78826b9f708b8c0545/FLAGffab76a5c [2022-01-31 13:01:38,916 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c64fcd97f/9aec495de3b54c78826b9f708b8c0545 [2022-01-31 13:01:38,917 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 13:01:38,918 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 13:01:38,919 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 13:01:38,919 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 13:01:38,925 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 13:01:38,926 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 01:01:38" (1/1) ... [2022-01-31 13:01:38,927 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19afeeca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:01:38, skipping insertion in model container [2022-01-31 13:01:38,927 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 01:01:38" (1/1) ... [2022-01-31 13:01:38,931 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 13:01:38,938 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 13:01:39,027 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_6.c[318,331] [2022-01-31 13:01:39,055 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 13:01:39,062 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 13:01:39,071 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_6.c[318,331] [2022-01-31 13:01:39,074 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 13:01:39,083 INFO L208 MainTranslator]: Completed translation [2022-01-31 13:01:39,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:01:39 WrapperNode [2022-01-31 13:01:39,083 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 13:01:39,084 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 13:01:39,084 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 13:01:39,084 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 13:01:39,091 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:01:39" (1/1) ... [2022-01-31 13:01:39,091 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:01:39" (1/1) ... [2022-01-31 13:01:39,094 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:01:39" (1/1) ... [2022-01-31 13:01:39,095 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:01:39" (1/1) ... [2022-01-31 13:01:39,098 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:01:39" (1/1) ... [2022-01-31 13:01:39,100 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:01:39" (1/1) ... [2022-01-31 13:01:39,101 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:01:39" (1/1) ... [2022-01-31 13:01:39,102 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 13:01:39,102 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 13:01:39,102 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 13:01:39,102 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 13:01:39,103 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:01:39" (1/1) ... [2022-01-31 13:01:39,108 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 13:01:39,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:01:39,125 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) [2022-01-31 13:01:39,127 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 [2022-01-31 13:01:39,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 13:01:39,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 13:01:39,150 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 13:01:39,150 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 13:01:39,150 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 13:01:39,150 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 13:01:39,150 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 13:01:39,150 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 13:01:39,150 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 13:01:39,150 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 13:01:39,150 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 13:01:39,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 13:01:39,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 13:01:39,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 13:01:39,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 13:01:39,151 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 13:01:39,152 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 13:01:39,191 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 13:01:39,192 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 13:01:39,291 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 13:01:39,295 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 13:01:39,295 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-31 13:01:39,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 01:01:39 BoogieIcfgContainer [2022-01-31 13:01:39,296 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 13:01:39,296 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 13:01:39,297 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 13:01:39,298 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 13:01:39,300 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 01:01:39" (1/1) ... [2022-01-31 13:01:39,310 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 01:01:39 BasicIcfg [2022-01-31 13:01:39,310 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 13:01:39,314 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 13:01:39,315 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 13:01:39,317 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 13:01:39,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 01:01:38" (1/4) ... [2022-01-31 13:01:39,317 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@740a5d3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 01:01:39, skipping insertion in model container [2022-01-31 13:01:39,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:01:39" (2/4) ... [2022-01-31 13:01:39,318 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@740a5d3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 01:01:39, skipping insertion in model container [2022-01-31 13:01:39,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 01:01:39" (3/4) ... [2022-01-31 13:01:39,318 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@740a5d3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 01:01:39, skipping insertion in model container [2022-01-31 13:01:39,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 01:01:39" (4/4) ... [2022-01-31 13:01:39,319 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_6.cJordan [2022-01-31 13:01:39,326 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 13:01:39,327 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 13:01:39,357 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 13:01:39,366 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2022-01-31 13:01:39,366 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 13:01:39,375 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 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) [2022-01-31 13:01:39,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-31 13:01:39,380 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:01:39,381 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:01:39,381 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:01:39,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:01:39,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1381876426, now seen corresponding path program 1 times [2022-01-31 13:01:39,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:01:39,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663812084] [2022-01-31 13:01:39,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:01:39,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:01:39,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:01:39,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:01:39,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:01:39,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 13:01:39,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:01:39,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663812084] [2022-01-31 13:01:39,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663812084] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 13:01:39,487 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 13:01:39,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 13:01:39,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601974428] [2022-01-31 13:01:39,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 13:01:39,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 13:01:39,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:01:39,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 13:01:39,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 13:01:39,511 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 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) [2022-01-31 13:01:39,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:01:39,530 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2022-01-31 13:01:39,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 13:01:39,533 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 [2022-01-31 13:01:39,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:01:39,537 INFO L225 Difference]: With dead ends: 22 [2022-01-31 13:01:39,537 INFO L226 Difference]: Without dead ends: 15 [2022-01-31 13:01:39,538 INFO L932 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 [2022-01-31 13:01:39,540 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 26 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 [2022-01-31 13:01:39,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 26 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 13:01:39,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-01-31 13:01:39,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-01-31 13:01:39,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 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) [2022-01-31 13:01:39,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2022-01-31 13:01:39,564 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2022-01-31 13:01:39,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:01:39,565 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2022-01-31 13:01:39,565 INFO L471 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) [2022-01-31 13:01:39,565 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2022-01-31 13:01:39,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-31 13:01:39,566 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:01:39,566 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:01:39,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 13:01:39,567 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:01:39,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:01:39,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1382799947, now seen corresponding path program 1 times [2022-01-31 13:01:39,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:01:39,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393642772] [2022-01-31 13:01:39,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:01:39,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:01:39,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:01:39,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:01:39,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:01:39,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 13:01:39,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:01:39,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393642772] [2022-01-31 13:01:39,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393642772] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 13:01:39,658 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 13:01:39,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 13:01:39,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058562878] [2022-01-31 13:01:39,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 13:01:39,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 13:01:39,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:01:39,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 13:01:39,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 13:01:39,663 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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) [2022-01-31 13:01:39,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:01:39,701 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2022-01-31 13:01:39,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 13:01:39,702 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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 [2022-01-31 13:01:39,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:01:39,703 INFO L225 Difference]: With dead ends: 17 [2022-01-31 13:01:39,703 INFO L226 Difference]: Without dead ends: 17 [2022-01-31 13:01:39,706 INFO L932 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 [2022-01-31 13:01:39,707 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 13:01:39,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 22 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 13:01:39,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-01-31 13:01:39,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-01-31 13:01:39,715 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) [2022-01-31 13:01:39,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-01-31 13:01:39,715 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2022-01-31 13:01:39,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:01:39,716 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-01-31 13:01:39,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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) [2022-01-31 13:01:39,716 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-01-31 13:01:39,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-31 13:01:39,716 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:01:39,716 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:01:39,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 13:01:39,717 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:01:39,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:01:39,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1658763799, now seen corresponding path program 1 times [2022-01-31 13:01:39,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:01:39,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636232897] [2022-01-31 13:01:39,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:01:39,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:01:39,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:01:39,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:01:39,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:01:39,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 13:01:39,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:01:39,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636232897] [2022-01-31 13:01:39,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636232897] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 13:01:39,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272067347] [2022-01-31 13:01:39,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:01:39,755 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:01:39,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:01:39,757 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) [2022-01-31 13:01:39,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 13:01:39,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:01:39,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 13:01:39,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:01:39,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 13:01:39,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 13:01:39,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 13:01:39,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272067347] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 13:01:39,871 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 13:01:39,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-31 13:01:39,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699761911] [2022-01-31 13:01:39,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 13:01:39,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 13:01:39,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:01:39,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 13:01:39,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 13:01:39,872 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 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) [2022-01-31 13:01:39,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:01:39,932 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2022-01-31 13:01:39,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 13:01:39,933 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 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 13 [2022-01-31 13:01:39,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:01:39,934 INFO L225 Difference]: With dead ends: 23 [2022-01-31 13:01:39,934 INFO L226 Difference]: Without dead ends: 23 [2022-01-31 13:01:39,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-01-31 13:01:39,935 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 23 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 13:01:39,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 24 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 13:01:39,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-01-31 13:01:39,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2022-01-31 13:01:39,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 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) [2022-01-31 13:01:39,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-01-31 13:01:39,938 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 13 [2022-01-31 13:01:39,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:01:39,939 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-01-31 13:01:39,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 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) [2022-01-31 13:01:39,939 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-01-31 13:01:39,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-31 13:01:39,939 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:01:39,939 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:01:39,956 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-31 13:01:40,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:01:40,156 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:01:40,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:01:40,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1581176064, now seen corresponding path program 1 times [2022-01-31 13:01:40,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:01:40,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939201196] [2022-01-31 13:01:40,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:01:40,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:01:40,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:01:40,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:01:40,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:01:40,260 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 13:01:40,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:01:40,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939201196] [2022-01-31 13:01:40,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939201196] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 13:01:40,261 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 13:01:40,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 13:01:40,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481131355] [2022-01-31 13:01:40,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 13:01:40,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 13:01:40,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:01:40,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 13:01:40,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 13:01:40,262 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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) [2022-01-31 13:01:40,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:01:40,291 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2022-01-31 13:01:40,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 13:01:40,292 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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 19 [2022-01-31 13:01:40,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:01:40,293 INFO L225 Difference]: With dead ends: 24 [2022-01-31 13:01:40,293 INFO L226 Difference]: Without dead ends: 24 [2022-01-31 13:01:40,294 INFO L932 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 [2022-01-31 13:01:40,297 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 13 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 13:01:40,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 20 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 13:01:40,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-01-31 13:01:40,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-01-31 13:01:40,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 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) [2022-01-31 13:01:40,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-01-31 13:01:40,314 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 19 [2022-01-31 13:01:40,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:01:40,314 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-01-31 13:01:40,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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) [2022-01-31 13:01:40,314 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-01-31 13:01:40,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-31 13:01:40,314 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:01:40,315 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:01:40,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 13:01:40,315 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:01:40,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:01:40,315 INFO L85 PathProgramCache]: Analyzing trace with hash 76189880, now seen corresponding path program 1 times [2022-01-31 13:01:40,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:01:40,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181402163] [2022-01-31 13:01:40,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:01:40,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:01:40,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:01:40,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:01:40,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:01:40,396 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 13:01:40,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:01:40,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181402163] [2022-01-31 13:01:40,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181402163] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 13:01:40,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788894989] [2022-01-31 13:01:40,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:01:40,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:01:40,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:01:40,398 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) [2022-01-31 13:01:40,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 13:01:40,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:01:40,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 13:01:40,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:01:40,495 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 13:01:40,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 13:01:40,582 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 13:01:40,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788894989] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 13:01:40,583 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 13:01:40,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-01-31 13:01:40,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723451325] [2022-01-31 13:01:40,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 13:01:40,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 13:01:40,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:01:40,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 13:01:40,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-01-31 13:01:40,584 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 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) [2022-01-31 13:01:40,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:01:40,665 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2022-01-31 13:01:40,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 13:01:40,665 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 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 23 [2022-01-31 13:01:40,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:01:40,666 INFO L225 Difference]: With dead ends: 32 [2022-01-31 13:01:40,666 INFO L226 Difference]: Without dead ends: 32 [2022-01-31 13:01:40,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-01-31 13:01:40,667 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 17 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 13:01:40,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 32 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 13:01:40,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-31 13:01:40,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-01-31 13:01:40,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 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) [2022-01-31 13:01:40,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-01-31 13:01:40,670 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 23 [2022-01-31 13:01:40,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:01:40,670 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-01-31 13:01:40,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 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) [2022-01-31 13:01:40,670 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-01-31 13:01:40,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-31 13:01:40,671 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:01:40,671 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:01:40,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 13:01:40,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:01:40,888 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:01:40,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:01:40,888 INFO L85 PathProgramCache]: Analyzing trace with hash 200191536, now seen corresponding path program 2 times [2022-01-31 13:01:40,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:01:40,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240857991] [2022-01-31 13:01:40,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:01:40,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:01:40,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:01:40,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:01:40,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:01:40,976 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 13:01:40,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:01:40,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240857991] [2022-01-31 13:01:40,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240857991] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 13:01:40,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827112905] [2022-01-31 13:01:40,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 13:01:40,976 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:01:40,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:01:40,978 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) [2022-01-31 13:01:40,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 13:01:41,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 13:01:41,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 13:01:41,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 13:01:41,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:01:41,093 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 13:01:41,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 13:01:41,211 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 13:01:41,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827112905] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 13:01:41,212 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 13:01:41,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-01-31 13:01:41,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544740896] [2022-01-31 13:01:41,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 13:01:41,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 13:01:41,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:01:41,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 13:01:41,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-01-31 13:01:41,213 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 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) [2022-01-31 13:01:41,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:01:41,390 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2022-01-31 13:01:41,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 13:01:41,391 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 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 [2022-01-31 13:01:41,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:01:41,391 INFO L225 Difference]: With dead ends: 48 [2022-01-31 13:01:41,391 INFO L226 Difference]: Without dead ends: 48 [2022-01-31 13:01:41,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=377, Invalid=615, Unknown=0, NotChecked=0, Total=992 [2022-01-31 13:01:41,392 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 25 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 13:01:41,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 27 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 13:01:41,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-01-31 13:01:41,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-01-31 13:01:41,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 43 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 13:01:41,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2022-01-31 13:01:41,396 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 31 [2022-01-31 13:01:41,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:01:41,396 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2022-01-31 13:01:41,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 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) [2022-01-31 13:01:41,396 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2022-01-31 13:01:41,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-31 13:01:41,397 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:01:41,397 INFO L514 BasicCegarLoop]: trace histogram [16, 14, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:01:41,415 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-01-31 13:01:41,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:01:41,600 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:01:41,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:01:41,601 INFO L85 PathProgramCache]: Analyzing trace with hash 2099511584, now seen corresponding path program 3 times [2022-01-31 13:01:41,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:01:41,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101590474] [2022-01-31 13:01:41,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:01:41,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:01:41,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:01:41,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:01:41,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:01:41,771 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 45 proven. 210 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 13:01:41,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:01:41,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101590474] [2022-01-31 13:01:41,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101590474] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 13:01:41,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56629977] [2022-01-31 13:01:41,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 13:01:41,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:01:41,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:01:41,773 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) [2022-01-31 13:01:41,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 13:01:41,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-31 13:01:41,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 13:01:41,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 13:01:41,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:01:41,899 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 46 proven. 2 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-01-31 13:01:41,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 13:01:42,059 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 46 proven. 2 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-01-31 13:01:42,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56629977] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 13:01:42,059 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 13:01:42,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 4, 7] total 25 [2022-01-31 13:01:42,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271805723] [2022-01-31 13:01:42,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 13:01:42,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 13:01:42,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:01:42,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 13:01:42,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=381, Unknown=0, NotChecked=0, Total=600 [2022-01-31 13:01:42,061 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand has 25 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 13:01:42,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:01:42,439 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2022-01-31 13:01:42,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 13:01:42,439 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-01-31 13:01:42,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:01:42,440 INFO L225 Difference]: With dead ends: 65 [2022-01-31 13:01:42,440 INFO L226 Difference]: Without dead ends: 62 [2022-01-31 13:01:42,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=653, Invalid=1509, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 13:01:42,441 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 80 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 13:01:42,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 47 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 13:01:42,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-01-31 13:01:42,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-01-31 13:01:42,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.1754385964912282) internal successors, (67), 57 states have internal predecessors, (67), 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) [2022-01-31 13:01:42,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2022-01-31 13:01:42,445 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 47 [2022-01-31 13:01:42,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:01:42,445 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2022-01-31 13:01:42,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 13:01:42,445 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2022-01-31 13:01:42,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-31 13:01:42,446 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:01:42,446 INFO L514 BasicCegarLoop]: trace histogram [20, 15, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:01:42,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-31 13:01:42,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:01:42,681 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:01:42,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:01:42,681 INFO L85 PathProgramCache]: Analyzing trace with hash 75572905, now seen corresponding path program 4 times [2022-01-31 13:01:42,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:01:42,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722139143] [2022-01-31 13:01:42,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:01:42,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:01:42,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:01:42,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:01:42,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:01:42,850 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 144 proven. 240 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-31 13:01:42,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:01:42,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722139143] [2022-01-31 13:01:42,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722139143] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 13:01:42,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750741252] [2022-01-31 13:01:42,850 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 13:01:42,850 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:01:42,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:01:42,852 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) [2022-01-31 13:01:42,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-31 13:01:42,889 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 13:01:42,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 13:01:42,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-31 13:01:42,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:01:42,994 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 144 proven. 240 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-31 13:01:42,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 13:01:43,353 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 144 proven. 240 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-31 13:01:43,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750741252] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 13:01:43,353 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 13:01:43,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-01-31 13:01:43,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643547784] [2022-01-31 13:01:43,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 13:01:43,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 13:01:43,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:01:43,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 13:01:43,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 13:01:43,356 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand has 36 states, 36 states have (on average 2.25) internal successors, (81), 35 states have internal predecessors, (81), 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) [2022-01-31 13:01:43,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:01:43,894 INFO L93 Difference]: Finished difference Result 96 states and 105 transitions. [2022-01-31 13:01:43,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 13:01:43,894 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.25) internal successors, (81), 35 states have internal predecessors, (81), 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 [2022-01-31 13:01:43,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:01:43,895 INFO L225 Difference]: With dead ends: 96 [2022-01-31 13:01:43,895 INFO L226 Difference]: Without dead ends: 96 [2022-01-31 13:01:43,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1718, Invalid=2838, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 13:01:43,897 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 43 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 13:01:43,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 42 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 13:01:43,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-01-31 13:01:43,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2022-01-31 13:01:43,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 91 states have (on average 1.10989010989011) internal successors, (101), 91 states have internal predecessors, (101), 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) [2022-01-31 13:01:43,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 105 transitions. [2022-01-31 13:01:43,901 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 105 transitions. Word has length 61 [2022-01-31 13:01:43,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:01:43,902 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 105 transitions. [2022-01-31 13:01:43,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.25) internal successors, (81), 35 states have internal predecessors, (81), 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) [2022-01-31 13:01:43,902 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 105 transitions. [2022-01-31 13:01:43,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 13:01:43,902 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:01:43,903 INFO L514 BasicCegarLoop]: trace histogram [37, 32, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:01:43,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-31 13:01:44,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:01:44,117 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:01:44,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:01:44,118 INFO L85 PathProgramCache]: Analyzing trace with hash 377058471, now seen corresponding path program 5 times [2022-01-31 13:01:44,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:01:44,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393486039] [2022-01-31 13:01:44,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:01:44,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:01:44,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:01:44,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:01:44,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:01:44,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1389 backedges. 297 proven. 1056 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-31 13:01:44,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:01:44,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393486039] [2022-01-31 13:01:44,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393486039] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 13:01:44,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902707790] [2022-01-31 13:01:44,628 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 13:01:44,628 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:01:44,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:01:44,644 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) [2022-01-31 13:01:44,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-31 13:01:44,684 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2022-01-31 13:01:44,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 13:01:44,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-31 13:01:44,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:01:45,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1389 backedges. 818 proven. 211 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2022-01-31 13:01:45,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 13:01:45,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1389 backedges. 818 proven. 211 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2022-01-31 13:01:45,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902707790] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 13:01:45,884 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 13:01:45,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 17, 17] total 66 [2022-01-31 13:01:45,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893598062] [2022-01-31 13:01:45,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 13:01:45,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-31 13:01:45,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:01:45,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-31 13:01:45,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 13:01:45,887 INFO L87 Difference]: Start difference. First operand 96 states and 105 transitions. Second operand has 66 states, 66 states have (on average 2.272727272727273) internal successors, (150), 65 states have internal predecessors, (150), 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) [2022-01-31 13:01:47,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:01:47,875 INFO L93 Difference]: Finished difference Result 214 states and 252 transitions. [2022-01-31 13:01:47,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 13:01:47,877 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.272727272727273) internal successors, (150), 65 states have internal predecessors, (150), 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 95 [2022-01-31 13:01:47,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:01:47,878 INFO L225 Difference]: With dead ends: 214 [2022-01-31 13:01:47,878 INFO L226 Difference]: Without dead ends: 214 [2022-01-31 13:01:47,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2076 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=6240, Invalid=10272, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 13:01:47,881 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 279 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 320 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 320 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 13:01:47,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 55 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [320 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 13:01:47,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-01-31 13:01:47,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2022-01-31 13:01:47,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 209 states have (on average 1.186602870813397) internal successors, (248), 209 states have internal predecessors, (248), 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) [2022-01-31 13:01:47,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 252 transitions. [2022-01-31 13:01:47,898 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 252 transitions. Word has length 95 [2022-01-31 13:01:47,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:01:47,898 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 252 transitions. [2022-01-31 13:01:47,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.272727272727273) internal successors, (150), 65 states have internal predecessors, (150), 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) [2022-01-31 13:01:47,899 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 252 transitions. [2022-01-31 13:01:47,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-01-31 13:01:47,900 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:01:47,900 INFO L514 BasicCegarLoop]: trace histogram [67, 34, 34, 33, 30, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:01:47,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-31 13:01:48,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:01:48,106 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:01:48,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:01:48,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1709022179, now seen corresponding path program 6 times [2022-01-31 13:01:48,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:01:48,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029384225] [2022-01-31 13:01:48,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:01:48,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:01:48,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:01:48,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:01:48,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:01:48,606 INFO L134 CoverageAnalysis]: Checked inductivity of 5611 backedges. 2278 proven. 1122 refuted. 0 times theorem prover too weak. 2211 trivial. 0 not checked. [2022-01-31 13:01:48,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:01:48,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029384225] [2022-01-31 13:01:48,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029384225] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 13:01:48,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284850507] [2022-01-31 13:01:48,606 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 13:01:48,606 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:01:48,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:01:48,620 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) [2022-01-31 13:01:48,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-31 13:01:48,675 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-01-31 13:01:48,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 13:01:48,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-31 13:01:48,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:01:48,960 INFO L134 CoverageAnalysis]: Checked inductivity of 5611 backedges. 832 proven. 32 refuted. 0 times theorem prover too weak. 4747 trivial. 0 not checked. [2022-01-31 13:01:48,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 13:01:49,222 INFO L134 CoverageAnalysis]: Checked inductivity of 5611 backedges. 832 proven. 32 refuted. 0 times theorem prover too weak. 4747 trivial. 0 not checked. [2022-01-31 13:01:49,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284850507] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 13:01:49,222 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 13:01:49,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 7, 10] total 50 [2022-01-31 13:01:49,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415463076] [2022-01-31 13:01:49,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 13:01:49,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 13:01:49,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:01:49,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 13:01:49,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1044, Invalid=1406, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 13:01:49,225 INFO L87 Difference]: Start difference. First operand 214 states and 252 transitions. Second operand has 50 states, 49 states have (on average 2.5918367346938775) internal successors, (127), 48 states have internal predecessors, (127), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 13:01:50,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:01:50,249 INFO L93 Difference]: Finished difference Result 243 states and 293 transitions. [2022-01-31 13:01:50,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 13:01:50,249 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 2.5918367346938775) internal successors, (127), 48 states have internal predecessors, (127), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 213 [2022-01-31 13:01:50,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:01:50,250 INFO L225 Difference]: With dead ends: 243 [2022-01-31 13:01:50,250 INFO L226 Difference]: Without dead ends: 240 [2022-01-31 13:01:50,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 424 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3128, Invalid=6184, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 13:01:50,252 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 129 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 13:01:50,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 47 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 13:01:50,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-01-31 13:01:50,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2022-01-31 13:01:50,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 235 states have (on average 1.2170212765957447) internal successors, (286), 235 states have internal predecessors, (286), 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) [2022-01-31 13:01:50,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 290 transitions. [2022-01-31 13:01:50,259 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 290 transitions. Word has length 213 [2022-01-31 13:01:50,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:01:50,260 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 290 transitions. [2022-01-31 13:01:50,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 2.5918367346938775) internal successors, (127), 48 states have internal predecessors, (127), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 13:01:50,260 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 290 transitions. [2022-01-31 13:01:50,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-01-31 13:01:50,264 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:01:50,264 INFO L514 BasicCegarLoop]: trace histogram [74, 40, 40, 34, 30, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:01:50,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-31 13:01:50,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:01:50,474 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:01:50,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:01:50,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1030847343, now seen corresponding path program 7 times [2022-01-31 13:01:50,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:01:50,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780356119] [2022-01-31 13:01:50,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:01:50,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:01:50,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:01:51,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:01:51,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:01:51,041 INFO L134 CoverageAnalysis]: Checked inductivity of 7036 backedges. 2765 proven. 1190 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2022-01-31 13:01:51,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:01:51,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780356119] [2022-01-31 13:01:51,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780356119] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 13:01:51,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541015983] [2022-01-31 13:01:51,042 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 13:01:51,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:01:51,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:01:51,043 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) [2022-01-31 13:01:51,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-31 13:01:51,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:01:51,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-31 13:01:51,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:01:51,469 INFO L134 CoverageAnalysis]: Checked inductivity of 7036 backedges. 2765 proven. 1190 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2022-01-31 13:01:51,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 13:01:52,684 INFO L134 CoverageAnalysis]: Checked inductivity of 7036 backedges. 2765 proven. 1190 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2022-01-31 13:01:52,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541015983] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 13:01:52,684 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 13:01:52,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 74 [2022-01-31 13:01:52,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155918364] [2022-01-31 13:01:52,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 13:01:52,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-31 13:01:52,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:01:52,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-31 13:01:52,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 13:01:52,689 INFO L87 Difference]: Start difference. First operand 240 states and 290 transitions. Second operand has 74 states, 74 states have (on average 2.1216216216216215) internal successors, (157), 73 states have internal predecessors, (157), 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) [2022-01-31 13:01:54,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:01:54,151 INFO L93 Difference]: Finished difference Result 312 states and 362 transitions. [2022-01-31 13:01:54,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-31 13:01:54,152 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.1216216216216215) internal successors, (157), 73 states have internal predecessors, (157), 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 239 [2022-01-31 13:01:54,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:01:54,153 INFO L225 Difference]: With dead ends: 312 [2022-01-31 13:01:54,153 INFO L226 Difference]: Without dead ends: 312 [2022-01-31 13:01:54,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 586 GetRequests, 444 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3214 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=7741, Invalid=12851, Unknown=0, NotChecked=0, Total=20592 [2022-01-31 13:01:54,157 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 81 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 13:01:54,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 52 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 13:01:54,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-01-31 13:01:54,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 312. [2022-01-31 13:01:54,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 307 states have (on average 1.1661237785016287) internal successors, (358), 307 states have internal predecessors, (358), 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) [2022-01-31 13:01:54,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 362 transitions. [2022-01-31 13:01:54,173 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 362 transitions. Word has length 239 [2022-01-31 13:01:54,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:01:54,173 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 362 transitions. [2022-01-31 13:01:54,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.1216216216216215) internal successors, (157), 73 states have internal predecessors, (157), 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) [2022-01-31 13:01:54,173 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 362 transitions. [2022-01-31 13:01:54,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2022-01-31 13:01:54,176 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:01:54,176 INFO L514 BasicCegarLoop]: trace histogram [110, 70, 40, 40, 30, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:01:54,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-31 13:01:54,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-31 13:01:54,378 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:01:54,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:01:54,378 INFO L85 PathProgramCache]: Analyzing trace with hash -488290871, now seen corresponding path program 8 times [2022-01-31 13:01:54,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:01:54,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396483556] [2022-01-31 13:01:54,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:01:54,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:01:54,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:01:55,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:01:55,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:01:55,860 INFO L134 CoverageAnalysis]: Checked inductivity of 13660 backedges. 5609 proven. 4970 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2022-01-31 13:01:55,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:01:55,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396483556] [2022-01-31 13:01:55,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396483556] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 13:01:55,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200933669] [2022-01-31 13:01:55,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 13:01:55,861 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:01:55,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:01:55,876 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) [2022-01-31 13:01:55,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-31 13:01:55,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 13:01:55,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 13:01:55,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 72 conjunts are in the unsatisfiable core [2022-01-31 13:01:55,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:01:56,410 INFO L134 CoverageAnalysis]: Checked inductivity of 13660 backedges. 5609 proven. 4970 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2022-01-31 13:01:56,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 13:01:59,806 INFO L134 CoverageAnalysis]: Checked inductivity of 13660 backedges. 5609 proven. 4970 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2022-01-31 13:01:59,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200933669] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 13:01:59,807 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 13:01:59,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 73, 73] total 146 [2022-01-31 13:01:59,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089348111] [2022-01-31 13:01:59,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 13:01:59,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2022-01-31 13:01:59,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:01:59,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2022-01-31 13:01:59,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10442, Invalid=10728, Unknown=0, NotChecked=0, Total=21170 [2022-01-31 13:01:59,812 INFO L87 Difference]: Start difference. First operand 312 states and 362 transitions. Second operand has 146 states, 146 states have (on average 2.0616438356164384) internal successors, (301), 145 states have internal predecessors, (301), 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) [2022-01-31 13:02:05,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:02:05,686 INFO L93 Difference]: Finished difference Result 456 states and 506 transitions. [2022-01-31 13:02:05,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2022-01-31 13:02:05,687 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 2.0616438356164384) internal successors, (301), 145 states have internal predecessors, (301), 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 311 [2022-01-31 13:02:05,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:02:05,688 INFO L225 Difference]: With dead ends: 456 [2022-01-31 13:02:05,689 INFO L226 Difference]: Without dead ends: 456 [2022-01-31 13:02:05,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 838 GetRequests, 552 SyntacticMatches, 0 SemanticMatches, 286 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12916 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=31033, Invalid=51623, Unknown=0, NotChecked=0, Total=82656 [2022-01-31 13:02:05,693 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 153 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 13:02:05,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 42 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 13:02:05,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2022-01-31 13:02:05,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 456. [2022-01-31 13:02:05,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 451 states have (on average 1.1130820399113082) internal successors, (502), 451 states have internal predecessors, (502), 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) [2022-01-31 13:02:05,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 506 transitions. [2022-01-31 13:02:05,701 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 506 transitions. Word has length 311 [2022-01-31 13:02:05,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:02:05,702 INFO L470 AbstractCegarLoop]: Abstraction has 456 states and 506 transitions. [2022-01-31 13:02:05,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 2.0616438356164384) internal successors, (301), 145 states have internal predecessors, (301), 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) [2022-01-31 13:02:05,702 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 506 transitions. [2022-01-31 13:02:05,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2022-01-31 13:02:05,708 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:02:05,708 INFO L514 BasicCegarLoop]: trace histogram [182, 142, 40, 40, 30, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:02:05,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-31 13:02:05,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:02:05,925 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:02:05,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:02:05,925 INFO L85 PathProgramCache]: Analyzing trace with hash -158375879, now seen corresponding path program 9 times [2022-01-31 13:02:05,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:02:05,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524609796] [2022-01-31 13:02:05,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:02:05,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:02:06,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:02:10,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:02:10,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:02:10,368 INFO L134 CoverageAnalysis]: Checked inductivity of 34684 backedges. 11297 proven. 20306 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2022-01-31 13:02:10,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:02:10,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524609796] [2022-01-31 13:02:10,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524609796] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 13:02:10,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213058923] [2022-01-31 13:02:10,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 13:02:10,369 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:02:10,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:02:10,384 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) [2022-01-31 13:02:10,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-31 13:02:10,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2022-01-31 13:02:10,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 13:02:10,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-31 13:02:10,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:02:11,604 INFO L134 CoverageAnalysis]: Checked inductivity of 34684 backedges. 4231 proven. 200 refuted. 0 times theorem prover too weak. 30253 trivial. 0 not checked. [2022-01-31 13:02:11,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 13:02:12,640 INFO L134 CoverageAnalysis]: Checked inductivity of 34684 backedges. 4231 proven. 200 refuted. 0 times theorem prover too weak. 30253 trivial. 0 not checked. [2022-01-31 13:02:12,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213058923] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 13:02:12,640 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 13:02:12,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [146, 13, 16] total 171 [2022-01-31 13:02:12,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218043480] [2022-01-31 13:02:12,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 13:02:12,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 171 states [2022-01-31 13:02:12,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:02:12,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 171 interpolants. [2022-01-31 13:02:12,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13870, Invalid=15200, Unknown=0, NotChecked=0, Total=29070 [2022-01-31 13:02:12,652 INFO L87 Difference]: Start difference. First operand 456 states and 506 transitions. Second operand has 171 states, 170 states have (on average 2.3117647058823527) internal successors, (393), 169 states have internal predecessors, (393), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 13:02:20,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:02:20,605 INFO L93 Difference]: Finished difference Result 509 states and 583 transitions. [2022-01-31 13:02:20,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2022-01-31 13:02:20,605 INFO L78 Accepts]: Start accepts. Automaton has has 171 states, 170 states have (on average 2.3117647058823527) internal successors, (393), 169 states have internal predecessors, (393), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 455 [2022-01-31 13:02:20,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:02:20,607 INFO L225 Difference]: With dead ends: 509 [2022-01-31 13:02:20,607 INFO L226 Difference]: Without dead ends: 506 [2022-01-31 13:02:20,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1245 GetRequests, 908 SyntacticMatches, 0 SemanticMatches, 337 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14711 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=41606, Invalid=72976, Unknown=0, NotChecked=0, Total=114582 [2022-01-31 13:02:20,611 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 572 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 777 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 572 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 1242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 777 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 13:02:20,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [572 Valid, 52 Invalid, 1242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [777 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 13:02:20,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2022-01-31 13:02:20,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 506. [2022-01-31 13:02:20,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 501 states have (on average 1.1497005988023952) internal successors, (576), 501 states have internal predecessors, (576), 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) [2022-01-31 13:02:20,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 580 transitions. [2022-01-31 13:02:20,618 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 580 transitions. Word has length 455 [2022-01-31 13:02:20,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:02:20,619 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 580 transitions. [2022-01-31 13:02:20,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 171 states, 170 states have (on average 2.3117647058823527) internal successors, (393), 169 states have internal predecessors, (393), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 13:02:20,619 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 580 transitions. [2022-01-31 13:02:20,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2022-01-31 13:02:20,621 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:02:20,621 INFO L514 BasicCegarLoop]: trace histogram [195, 143, 52, 52, 30, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:02:20,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-31 13:02:20,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-31 13:02:20,837 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:02:20,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:02:20,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1120053885, now seen corresponding path program 10 times [2022-01-31 13:02:20,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:02:20,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747210857] [2022-01-31 13:02:20,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:02:20,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:02:20,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:02:25,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:02:25,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:02:25,673 INFO L134 CoverageAnalysis]: Checked inductivity of 40677 backedges. 14832 proven. 20592 refuted. 0 times theorem prover too weak. 5253 trivial. 0 not checked. [2022-01-31 13:02:25,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:02:25,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747210857] [2022-01-31 13:02:25,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747210857] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 13:02:25,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110377485] [2022-01-31 13:02:25,673 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 13:02:25,673 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:02:25,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:02:25,674 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) [2022-01-31 13:02:25,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-31 13:02:25,830 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 13:02:25,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 13:02:25,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 991 conjuncts, 145 conjunts are in the unsatisfiable core [2022-01-31 13:02:25,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:02:26,501 INFO L134 CoverageAnalysis]: Checked inductivity of 40677 backedges. 14832 proven. 20592 refuted. 0 times theorem prover too weak. 5253 trivial. 0 not checked. [2022-01-31 13:02:26,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 13:02:39,338 INFO L134 CoverageAnalysis]: Checked inductivity of 40677 backedges. 14832 proven. 20592 refuted. 0 times theorem prover too weak. 5253 trivial. 0 not checked. [2022-01-31 13:02:39,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110377485] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 13:02:39,339 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 13:02:39,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [147, 146, 146] total 292 [2022-01-31 13:02:39,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120593781] [2022-01-31 13:02:39,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 13:02:39,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 292 states [2022-01-31 13:02:39,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:02:39,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 292 interpolants. [2022-01-31 13:02:39,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42197, Invalid=42775, Unknown=0, NotChecked=0, Total=84972 [2022-01-31 13:02:39,349 INFO L87 Difference]: Start difference. First operand 506 states and 580 transitions. Second operand has 292 states, 292 states have (on average 2.030821917808219) internal successors, (593), 291 states have internal predecessors, (593), 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) [2022-01-31 13:02:57,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:02:57,472 INFO L93 Difference]: Finished difference Result 796 states and 870 transitions. [2022-01-31 13:02:57,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 291 states. [2022-01-31 13:02:57,473 INFO L78 Accepts]: Start accepts. Automaton has has 292 states, 292 states have (on average 2.030821917808219) internal successors, (593), 291 states have internal predecessors, (593), 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 505 [2022-01-31 13:02:57,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:02:57,485 INFO L225 Difference]: With dead ends: 796 [2022-01-31 13:02:57,485 INFO L226 Difference]: Without dead ends: 796 [2022-01-31 13:02:57,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1445 GetRequests, 867 SyntacticMatches, 0 SemanticMatches, 578 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52482 ImplicationChecksByTransitivity, 33.5s TimeCoverageRelationStatistics Valid=126006, Invalid=209814, Unknown=0, NotChecked=0, Total=335820 [2022-01-31 13:02:57,498 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 299 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 441 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 1076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 441 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 13:02:57,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 47 Invalid, 1076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [441 Valid, 635 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 13:02:57,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2022-01-31 13:02:57,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 796. [2022-01-31 13:02:57,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 791 states have (on average 1.0948166877370418) internal successors, (866), 791 states have internal predecessors, (866), 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) [2022-01-31 13:02:57,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 870 transitions. [2022-01-31 13:02:57,521 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 870 transitions. Word has length 505 [2022-01-31 13:02:57,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:02:57,522 INFO L470 AbstractCegarLoop]: Abstraction has 796 states and 870 transitions. [2022-01-31 13:02:57,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 292 states, 292 states have (on average 2.030821917808219) internal successors, (593), 291 states have internal predecessors, (593), 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) [2022-01-31 13:02:57,522 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 870 transitions. [2022-01-31 13:02:57,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 796 [2022-01-31 13:02:57,526 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:02:57,526 INFO L514 BasicCegarLoop]: trace histogram [340, 288, 52, 52, 30, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:02:57,556 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-01-31 13:02:57,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-31 13:02:57,757 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:02:57,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:02:57,759 INFO L85 PathProgramCache]: Analyzing trace with hash -780439167, now seen corresponding path program 11 times [2022-01-31 13:02:57,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:02:57,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079002229] [2022-01-31 13:02:57,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:02:57,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:02:58,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:03:14,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:03:14,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:03:14,871 INFO L134 CoverageAnalysis]: Checked inductivity of 118252 backedges. 29767 proven. 83232 refuted. 0 times theorem prover too weak. 5253 trivial. 0 not checked. [2022-01-31 13:03:14,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:03:14,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079002229] [2022-01-31 13:03:14,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079002229] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 13:03:14,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461648027] [2022-01-31 13:03:14,872 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 13:03:14,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:03:14,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:03:14,873 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 13:03:14,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-31 13:03:15,509 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 298 check-sat command(s) [2022-01-31 13:03:15,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 13:03:15,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 1287 conjuncts, 151 conjunts are in the unsatisfiable core [2022-01-31 13:03:15,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:03:38,043 INFO L134 CoverageAnalysis]: Checked inductivity of 118252 backedges. 65688 proven. 22952 refuted. 0 times theorem prover too weak. 29612 trivial. 0 not checked. [2022-01-31 13:03:38,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 13:04:10,957 INFO L134 CoverageAnalysis]: Checked inductivity of 118252 backedges. 65688 proven. 22952 refuted. 0 times theorem prover too weak. 29612 trivial. 0 not checked. [2022-01-31 13:04:10,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461648027] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 13:04:10,957 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 13:04:10,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [292, 151, 151] total 590 [2022-01-31 13:04:10,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593455399] [2022-01-31 13:04:10,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 13:04:10,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 590 states [2022-01-31 13:04:10,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:04:10,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 590 interpolants. [2022-01-31 13:04:10,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173168, Invalid=174342, Unknown=0, NotChecked=0, Total=347510 [2022-01-31 13:04:11,000 INFO L87 Difference]: Start difference. First operand 796 states and 870 transitions. Second operand has 590 states, 590 states have (on average 2.227118644067797) internal successors, (1314), 589 states have internal predecessors, (1314), 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) [2022-01-31 13:09:05,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:09:05,444 INFO L93 Difference]: Finished difference Result 1870 states and 2212 transitions. [2022-01-31 13:09:05,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 590 states. [2022-01-31 13:09:05,447 INFO L78 Accepts]: Start accepts. Automaton has has 590 states, 590 states have (on average 2.227118644067797) internal successors, (1314), 589 states have internal predecessors, (1314), 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 795 [2022-01-31 13:09:05,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:09:05,452 INFO L225 Difference]: With dead ends: 1870 [2022-01-31 13:09:05,452 INFO L226 Difference]: Without dead ends: 1870 [2022-01-31 13:09:05,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2767 GetRequests, 1592 SyntacticMatches, 0 SemanticMatches, 1175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183157 ImplicationChecksByTransitivity, 168.5s TimeCoverageRelationStatistics Valid=519498, Invalid=864654, Unknown=0, NotChecked=0, Total=1384152 [2022-01-31 13:09:05,568 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 3562 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1844 mSolverCounterSat, 5011 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3562 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 6855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5011 IncrementalHoareTripleChecker+Valid, 1844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-01-31 13:09:05,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3562 Valid, 60 Invalid, 6855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5011 Valid, 1844 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-01-31 13:09:05,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1870 states. [2022-01-31 13:09:05,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1870 to 1870. [2022-01-31 13:09:05,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1870 states, 1865 states have (on average 1.1839142091152814) internal successors, (2208), 1865 states have internal predecessors, (2208), 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) [2022-01-31 13:09:05,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1870 states to 1870 states and 2212 transitions. [2022-01-31 13:09:05,587 INFO L78 Accepts]: Start accepts. Automaton has 1870 states and 2212 transitions. Word has length 795 [2022-01-31 13:09:05,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:09:05,588 INFO L470 AbstractCegarLoop]: Abstraction has 1870 states and 2212 transitions. [2022-01-31 13:09:05,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 590 states, 590 states have (on average 2.227118644067797) internal successors, (1314), 589 states have internal predecessors, (1314), 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) [2022-01-31 13:09:05,589 INFO L276 IsEmpty]: Start isEmpty. Operand 1870 states and 2212 transitions. [2022-01-31 13:09:05,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1870 [2022-01-31 13:09:05,609 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:09:05,610 INFO L514 BasicCegarLoop]: trace histogram [609, 320, 320, 298, 289, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:09:05,628 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-01-31 13:09:05,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-31 13:09:05,825 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:09:05,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:09:05,825 INFO L85 PathProgramCache]: Analyzing trace with hash 2022732223, now seen corresponding path program 12 times [2022-01-31 13:09:05,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:09:05,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026721513] [2022-01-31 13:09:05,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:09:05,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:09:06,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:09:23,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:09:23,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:09:23,229 INFO L134 CoverageAnalysis]: Checked inductivity of 472961 backedges. 185310 proven. 83810 refuted. 0 times theorem prover too weak. 203841 trivial. 0 not checked. [2022-01-31 13:09:23,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:09:23,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026721513] [2022-01-31 13:09:23,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026721513] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 13:09:23,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65486396] [2022-01-31 13:09:23,230 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 13:09:23,230 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:09:23,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:09:23,231 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 13:09:23,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-31 13:09:23,447 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2022-01-31 13:09:23,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 13:09:23,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-31 13:09:23,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:09:28,047 INFO L134 CoverageAnalysis]: Checked inductivity of 472961 backedges. 39802 proven. 968 refuted. 0 times theorem prover too weak. 432191 trivial. 0 not checked. [2022-01-31 13:09:28,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 13:09:31,922 INFO L134 CoverageAnalysis]: Checked inductivity of 472961 backedges. 39802 proven. 968 refuted. 0 times theorem prover too weak. 432191 trivial. 0 not checked. [2022-01-31 13:09:31,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65486396] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 13:09:31,923 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 13:09:31,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [293, 25, 28] total 342 [2022-01-31 13:09:31,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439088812] [2022-01-31 13:09:31,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 13:09:31,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 342 states [2022-01-31 13:09:31,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:09:31,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 342 interpolants. [2022-01-31 13:09:31,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56962, Invalid=59660, Unknown=0, NotChecked=0, Total=116622 [2022-01-31 13:09:31,935 INFO L87 Difference]: Start difference. First operand 1870 states and 2212 transitions. Second operand has 342 states, 341 states have (on average 2.2961876832844577) internal successors, (783), 340 states have internal predecessors, (783), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 13:10:03,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:10:03,221 INFO L93 Difference]: Finished difference Result 1971 states and 2361 transitions. [2022-01-31 13:10:03,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 342 states. [2022-01-31 13:10:03,222 INFO L78 Accepts]: Start accepts. Automaton has has 342 states, 341 states have (on average 2.2961876832844577) internal successors, (783), 340 states have internal predecessors, (783), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1869 [2022-01-31 13:10:03,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:10:03,226 INFO L225 Difference]: With dead ends: 1971 [2022-01-31 13:10:03,226 INFO L226 Difference]: Without dead ends: 1968 [2022-01-31 13:10:03,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4415 GetRequests, 3736 SyntacticMatches, 0 SemanticMatches, 679 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58832 ImplicationChecksByTransitivity, 47.6s TimeCoverageRelationStatistics Valid=170882, Invalid=292198, Unknown=0, NotChecked=0, Total=463080 [2022-01-31 13:10:03,241 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 1157 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 2009 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1157 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 2871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2009 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 13:10:03,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1157 Valid, 52 Invalid, 2871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2009 Valid, 862 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 13:10:03,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1968 states. [2022-01-31 13:10:03,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1968 to 1968. [2022-01-31 13:10:03,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1968 states, 1963 states have (on average 1.1991849210392256) internal successors, (2354), 1963 states have internal predecessors, (2354), 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) [2022-01-31 13:10:03,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1968 states to 1968 states and 2358 transitions. [2022-01-31 13:10:03,257 INFO L78 Accepts]: Start accepts. Automaton has 1968 states and 2358 transitions. Word has length 1869 [2022-01-31 13:10:03,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:10:03,258 INFO L470 AbstractCegarLoop]: Abstraction has 1968 states and 2358 transitions. [2022-01-31 13:10:03,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 342 states, 341 states have (on average 2.2961876832844577) internal successors, (783), 340 states have internal predecessors, (783), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 13:10:03,258 INFO L276 IsEmpty]: Start isEmpty. Operand 1968 states and 2358 transitions. [2022-01-31 13:10:03,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1968 [2022-01-31 13:10:03,278 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:10:03,279 INFO L514 BasicCegarLoop]: trace histogram [634, 344, 344, 298, 290, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:10:03,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-31 13:10:03,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-31 13:10:03,496 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:10:03,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:10:03,496 INFO L85 PathProgramCache]: Analyzing trace with hash -970120395, now seen corresponding path program 13 times [2022-01-31 13:10:03,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:10:03,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490036573] [2022-01-31 13:10:03,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:10:03,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:10:03,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:10:19,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:10:19,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:10:19,692 INFO L134 CoverageAnalysis]: Checked inductivity of 519948 backedges. 199917 proven. 84390 refuted. 0 times theorem prover too weak. 235641 trivial. 0 not checked. [2022-01-31 13:10:19,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:10:19,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490036573] [2022-01-31 13:10:19,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490036573] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 13:10:19,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954531011] [2022-01-31 13:10:19,692 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 13:10:19,693 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:10:19,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:10:19,694 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 13:10:19,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-31 13:10:20,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:10:20,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 3623 conjuncts, 292 conjunts are in the unsatisfiable core [2022-01-31 13:10:20,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:10:22,057 INFO L134 CoverageAnalysis]: Checked inductivity of 519948 backedges. 199917 proven. 84390 refuted. 0 times theorem prover too weak. 235641 trivial. 0 not checked. [2022-01-31 13:10:22,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 13:11:11,508 INFO L134 CoverageAnalysis]: Checked inductivity of 519948 backedges. 199917 proven. 84390 refuted. 0 times theorem prover too weak. 235641 trivial. 0 not checked. [2022-01-31 13:11:11,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954531011] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 13:11:11,509 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 13:11:11,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [294, 293, 293] total 586 [2022-01-31 13:11:11,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848125809] [2022-01-31 13:11:11,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 13:11:11,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 586 states [2022-01-31 13:11:11,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:11:11,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 586 interpolants. [2022-01-31 13:11:11,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170822, Invalid=171988, Unknown=0, NotChecked=0, Total=342810 [2022-01-31 13:11:11,538 INFO L87 Difference]: Start difference. First operand 1968 states and 2358 transitions. Second operand has 586 states, 586 states have (on average 2.015358361774744) internal successors, (1181), 585 states have internal predecessors, (1181), 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) [2022-01-31 13:12:27,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:12:27,523 INFO L93 Difference]: Finished difference Result 2552 states and 2942 transitions. [2022-01-31 13:12:27,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 585 states. [2022-01-31 13:12:27,524 INFO L78 Accepts]: Start accepts. Automaton has has 586 states, 586 states have (on average 2.015358361774744) internal successors, (1181), 585 states have internal predecessors, (1181), 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 1967 [2022-01-31 13:12:27,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:12:27,532 INFO L225 Difference]: With dead ends: 2552 [2022-01-31 13:12:27,533 INFO L226 Difference]: Without dead ends: 2552 [2022-01-31 13:12:27,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4810 GetRequests, 3644 SyntacticMatches, 0 SemanticMatches, 1166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213006 ImplicationChecksByTransitivity, 131.3s TimeCoverageRelationStatistics Valid=511293, Invalid=851763, Unknown=0, NotChecked=0, Total=1363056 [2022-01-31 13:12:27,595 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 593 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1230 mSolverCounterSat, 881 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 593 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 2111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 881 IncrementalHoareTripleChecker+Valid, 1230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 13:12:27,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [593 Valid, 52 Invalid, 2111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [881 Valid, 1230 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 13:12:27,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2552 states. [2022-01-31 13:12:27,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2552 to 2552. [2022-01-31 13:12:27,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2552 states, 2547 states have (on average 1.1535139379662347) internal successors, (2938), 2547 states have internal predecessors, (2938), 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) [2022-01-31 13:12:27,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2552 states to 2552 states and 2942 transitions. [2022-01-31 13:12:27,654 INFO L78 Accepts]: Start accepts. Automaton has 2552 states and 2942 transitions. Word has length 1967 [2022-01-31 13:12:27,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:12:27,655 INFO L470 AbstractCegarLoop]: Abstraction has 2552 states and 2942 transitions. [2022-01-31 13:12:27,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 586 states, 586 states have (on average 2.015358361774744) internal successors, (1181), 585 states have internal predecessors, (1181), 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) [2022-01-31 13:12:27,656 INFO L276 IsEmpty]: Start isEmpty. Operand 2552 states and 2942 transitions. [2022-01-31 13:12:27,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2552 [2022-01-31 13:12:27,736 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:12:27,737 INFO L514 BasicCegarLoop]: trace histogram [926, 582, 344, 344, 298, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:12:27,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-31 13:12:27,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:12:27,937 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:12:27,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:12:27,938 INFO L85 PathProgramCache]: Analyzing trace with hash -194575763, now seen corresponding path program 14 times [2022-01-31 13:12:27,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:12:27,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751232263] [2022-01-31 13:12:27,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:12:27,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:12:29,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:13:31,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:13:31,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:13:31,633 INFO L134 CoverageAnalysis]: Checked inductivity of 975468 backedges. 400521 proven. 339306 refuted. 0 times theorem prover too weak. 235641 trivial. 0 not checked. [2022-01-31 13:13:31,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:13:31,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751232263] [2022-01-31 13:13:31,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751232263] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 13:13:31,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698268815] [2022-01-31 13:13:31,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 13:13:31,634 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:13:31,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:13:31,637 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 13:13:31,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-31 13:13:32,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 13:13:32,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 13:13:32,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 4791 conjuncts, 584 conjunts are in the unsatisfiable core [2022-01-31 13:13:32,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:13:34,652 INFO L134 CoverageAnalysis]: Checked inductivity of 975468 backedges. 400521 proven. 339306 refuted. 0 times theorem prover too weak. 235641 trivial. 0 not checked. [2022-01-31 13:13:34,652 INFO L328 TraceCheckSpWp]: Computing backward predicates...