/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-14 21:57:41,094 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-14 21:57:41,110 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-14 21:57:41,164 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-14 21:57:41,182 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-14 21:57:41,182 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-14 21:57:41,183 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-14 21:57:41,183 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-14 21:57:41,184 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-14 21:57:41,185 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-14 21:57:41,186 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-14 21:57:41,187 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-14 21:57:41,188 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-14 21:57:41,192 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-14 21:57:41,192 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-14 21:57:41,193 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-14 21:57:41,195 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-14 21:57:41,206 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-14 21:57:41,207 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-14 21:57:41,208 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-14 21:57:41,208 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-14 21:57:41,221 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-14 21:57:41,222 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-14 21:57:41,223 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-14 21:57:41,223 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-14 21:57:41,223 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-14 21:57:41,223 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-14 21:57:41,224 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-14 21:57:41,224 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-14 21:57:41,224 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-14 21:57:41,224 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-14 21:57:41,225 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-14 21:57:41,225 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-14 21:57:41,225 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-14 21:57:41,225 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-14 21:57:41,225 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-14 21:57:41,225 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-14 21:57:41,225 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-14 21:57:41,225 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-14 21:57:41,225 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 21:57:41,226 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-14 21:57:41,226 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-14 21:57:41,226 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-14 21:57:41,226 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-14 21:57:41,468 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-14 21:57:41,486 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-14 21:57:41,488 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-14 21:57:41,489 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-14 21:57:41,490 INFO L275 PluginConnector]: CDTParser initialized [2022-02-14 21:57:41,492 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound10.c [2022-02-14 21:57:41,539 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/efd07eb18/90ba4929985b4d2f8b62b4a24421843e/FLAG632d1c27e [2022-02-14 21:57:41,872 INFO L306 CDTParser]: Found 1 translation units. [2022-02-14 21:57:41,873 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound10.c [2022-02-14 21:57:41,877 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/efd07eb18/90ba4929985b4d2f8b62b4a24421843e/FLAG632d1c27e [2022-02-14 21:57:41,886 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/efd07eb18/90ba4929985b4d2f8b62b4a24421843e [2022-02-14 21:57:41,888 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-14 21:57:41,890 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-14 21:57:41,892 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-14 21:57:41,892 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-14 21:57:41,894 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-14 21:57:41,895 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 09:57:41" (1/1) ... [2022-02-14 21:57:41,895 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29223591 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:57:41, skipping insertion in model container [2022-02-14 21:57:41,895 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 09:57:41" (1/1) ... [2022-02-14 21:57:41,900 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-14 21:57:41,913 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-14 21:57:42,059 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound10.c[597,610] [2022-02-14 21:57:42,083 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 21:57:42,090 INFO L203 MainTranslator]: Completed pre-run [2022-02-14 21:57:42,099 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound10.c[597,610] [2022-02-14 21:57:42,121 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 21:57:42,131 INFO L208 MainTranslator]: Completed translation [2022-02-14 21:57:42,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:57:42 WrapperNode [2022-02-14 21:57:42,132 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-14 21:57:42,133 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-14 21:57:42,133 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-14 21:57:42,133 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-14 21:57:42,141 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:57:42" (1/1) ... [2022-02-14 21:57:42,141 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:57:42" (1/1) ... [2022-02-14 21:57:42,146 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:57:42" (1/1) ... [2022-02-14 21:57:42,147 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:57:42" (1/1) ... [2022-02-14 21:57:42,150 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:57:42" (1/1) ... [2022-02-14 21:57:42,154 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:57:42" (1/1) ... [2022-02-14 21:57:42,157 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:57:42" (1/1) ... [2022-02-14 21:57:42,161 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-14 21:57:42,161 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-14 21:57:42,162 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-14 21:57:42,162 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-14 21:57:42,163 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:57:42" (1/1) ... [2022-02-14 21:57:42,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 21:57:42,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:57:42,184 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) [2022-02-14 21:57:42,197 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 [2022-02-14 21:57:42,217 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-14 21:57:42,217 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-14 21:57:42,217 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-14 21:57:42,217 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-14 21:57:42,217 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-14 21:57:42,217 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-14 21:57:42,218 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-14 21:57:42,218 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-14 21:57:42,218 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-14 21:57:42,218 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-14 21:57:42,219 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-14 21:57:42,219 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-14 21:57:42,219 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-14 21:57:42,219 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-14 21:57:42,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-14 21:57:42,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-14 21:57:42,220 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-14 21:57:42,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-14 21:57:42,221 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-14 21:57:42,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-14 21:57:42,267 INFO L234 CfgBuilder]: Building ICFG [2022-02-14 21:57:42,268 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-14 21:57:42,403 INFO L275 CfgBuilder]: Performing block encoding [2022-02-14 21:57:42,407 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-14 21:57:42,407 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-14 21:57:42,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 09:57:42 BoogieIcfgContainer [2022-02-14 21:57:42,408 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-14 21:57:42,409 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-14 21:57:42,409 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-14 21:57:42,428 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-14 21:57:42,430 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 09:57:42" (1/1) ... [2022-02-14 21:57:42,441 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 09:57:42 BasicIcfg [2022-02-14 21:57:42,442 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-14 21:57:42,443 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-14 21:57:42,443 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-14 21:57:42,461 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-14 21:57:42,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 09:57:41" (1/4) ... [2022-02-14 21:57:42,462 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31dc43ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 09:57:42, skipping insertion in model container [2022-02-14 21:57:42,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:57:42" (2/4) ... [2022-02-14 21:57:42,462 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31dc43ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 09:57:42, skipping insertion in model container [2022-02-14 21:57:42,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 09:57:42" (3/4) ... [2022-02-14 21:57:42,462 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31dc43ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.02 09:57:42, skipping insertion in model container [2022-02-14 21:57:42,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 09:57:42" (4/4) ... [2022-02-14 21:57:42,463 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_unwindbound10.cJordan [2022-02-14 21:57:42,467 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-14 21:57:42,467 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-14 21:57:42,509 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-14 21:57:42,516 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 [2022-02-14 21:57:42,516 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-14 21:57:42,540 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-14 21:57:42,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-14 21:57:42,545 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:57:42,545 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:57:42,545 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:57:42,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:57:42,549 INFO L85 PathProgramCache]: Analyzing trace with hash -498253564, now seen corresponding path program 1 times [2022-02-14 21:57:42,554 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:57:42,555 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52595585] [2022-02-14 21:57:42,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:57:42,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:57:42,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:57:42,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:57:42,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:57:42,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 21:57:42,710 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:57:42,710 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52595585] [2022-02-14 21:57:42,711 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52595585] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 21:57:42,711 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 21:57:42,711 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-14 21:57:42,712 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332699385] [2022-02-14 21:57:42,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 21:57:42,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-14 21:57:42,717 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:57:42,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-14 21:57:42,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-14 21:57:42,738 INFO L87 Difference]: Start difference. First operand has 25 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:57:42,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:57:42,787 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2022-02-14 21:57:42,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-14 21:57:42,789 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-02-14 21:57:42,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:57:42,796 INFO L225 Difference]: With dead ends: 26 [2022-02-14 21:57:42,796 INFO L226 Difference]: Without dead ends: 21 [2022-02-14 21:57:42,797 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 [2022-02-14 21:57:42,800 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 21:57:42,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 31 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 21:57:42,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-02-14 21:57:42,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2022-02-14 21:57:42,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-14 21:57:42,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-02-14 21:57:42,822 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2022-02-14 21:57:42,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:57:42,823 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-02-14 21:57:42,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:57:42,823 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-02-14 21:57:42,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-14 21:57:42,824 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:57:42,824 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:57:42,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-14 21:57:42,825 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:57:42,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:57:42,828 INFO L85 PathProgramCache]: Analyzing trace with hash -467747580, now seen corresponding path program 1 times [2022-02-14 21:57:42,828 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:57:42,828 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087685021] [2022-02-14 21:57:42,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:57:42,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:57:42,838 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 21:57:42,839 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1227650233] [2022-02-14 21:57:42,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:57:42,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:57:42,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:57:42,852 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) [2022-02-14 21:57:42,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-14 21:57:42,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:57:42,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-14 21:57:42,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:57:43,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 21:57:43,054 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 21:57:43,054 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:57:43,055 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087685021] [2022-02-14 21:57:43,055 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 21:57:43,059 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227650233] [2022-02-14 21:57:43,059 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227650233] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 21:57:43,059 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 21:57:43,059 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-14 21:57:43,060 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284768656] [2022-02-14 21:57:43,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 21:57:43,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-14 21:57:43,062 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:57:43,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-14 21:57:43,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-14 21:57:43,063 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:57:43,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:57:43,129 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2022-02-14 21:57:43,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-14 21:57:43,129 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-02-14 21:57:43,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:57:43,133 INFO L225 Difference]: With dead ends: 32 [2022-02-14 21:57:43,133 INFO L226 Difference]: Without dead ends: 29 [2022-02-14 21:57:43,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-14 21:57:43,135 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 12 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 21:57:43,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 70 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 21:57:43,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-02-14 21:57:43,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-02-14 21:57:43,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-14 21:57:43,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2022-02-14 21:57:43,147 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 12 [2022-02-14 21:57:43,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:57:43,148 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2022-02-14 21:57:43,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:57:43,148 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2022-02-14 21:57:43,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-14 21:57:43,148 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:57:43,148 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:57:43,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-14 21:57:43,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:57:43,359 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:57:43,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:57:43,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1909475431, now seen corresponding path program 1 times [2022-02-14 21:57:43,360 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:57:43,360 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748880313] [2022-02-14 21:57:43,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:57:43,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:57:43,375 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 21:57:43,375 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [47514557] [2022-02-14 21:57:43,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:57:43,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:57:43,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:57:43,376 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) [2022-02-14 21:57:43,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-14 21:57:43,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:57:43,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-14 21:57:43,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:57:43,580 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 21:57:43,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 21:57:43,694 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-14 21:57:43,695 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:57:43,695 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748880313] [2022-02-14 21:57:43,695 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 21:57:43,695 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47514557] [2022-02-14 21:57:43,695 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47514557] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 21:57:43,695 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 21:57:43,695 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2022-02-14 21:57:43,696 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821586944] [2022-02-14 21:57:43,696 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 21:57:43,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-14 21:57:43,696 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:57:43,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-14 21:57:43,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-02-14 21:57:43,697 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-14 21:57:43,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:57:43,862 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2022-02-14 21:57:43,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-14 21:57:43,863 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 22 [2022-02-14 21:57:43,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:57:43,864 INFO L225 Difference]: With dead ends: 43 [2022-02-14 21:57:43,864 INFO L226 Difference]: Without dead ends: 38 [2022-02-14 21:57:43,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-02-14 21:57:43,865 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 18 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 21:57:43,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 121 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 21:57:43,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-02-14 21:57:43,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2022-02-14 21:57:43,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-14 21:57:43,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2022-02-14 21:57:43,869 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 22 [2022-02-14 21:57:43,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:57:43,869 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2022-02-14 21:57:43,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-14 21:57:43,869 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2022-02-14 21:57:43,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-14 21:57:43,870 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:57:43,870 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:57:43,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-14 21:57:44,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-02-14 21:57:44,071 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:57:44,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:57:44,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1519292561, now seen corresponding path program 1 times [2022-02-14 21:57:44,072 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:57:44,072 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410799738] [2022-02-14 21:57:44,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:57:44,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:57:44,080 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 21:57:44,081 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [448304640] [2022-02-14 21:57:44,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:57:44,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:57:44,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:57:44,082 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) [2022-02-14 21:57:44,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-14 21:57:44,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:57:44,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-14 21:57:44,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:57:44,172 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 21:57:44,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 21:57:44,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 21:57:44,252 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:57:44,252 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410799738] [2022-02-14 21:57:44,252 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 21:57:44,252 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448304640] [2022-02-14 21:57:44,252 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448304640] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 21:57:44,253 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 21:57:44,253 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-02-14 21:57:44,253 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601368833] [2022-02-14 21:57:44,253 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 21:57:44,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-14 21:57:44,253 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:57:44,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-14 21:57:44,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-02-14 21:57:44,254 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-02-14 21:57:44,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:57:44,306 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2022-02-14 21:57:44,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-14 21:57:44,307 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 23 [2022-02-14 21:57:44,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:57:44,308 INFO L225 Difference]: With dead ends: 71 [2022-02-14 21:57:44,308 INFO L226 Difference]: Without dead ends: 71 [2022-02-14 21:57:44,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-02-14 21:57:44,309 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 48 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 21:57:44,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 119 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 21:57:44,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-02-14 21:57:44,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 59. [2022-02-14 21:57:44,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 45 states have internal predecessors, (53), 8 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-14 21:57:44,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2022-02-14 21:57:44,322 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 23 [2022-02-14 21:57:44,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:57:44,322 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2022-02-14 21:57:44,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-02-14 21:57:44,322 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2022-02-14 21:57:44,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-14 21:57:44,323 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:57:44,323 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:57:44,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-14 21:57:44,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:57:44,524 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:57:44,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:57:44,524 INFO L85 PathProgramCache]: Analyzing trace with hash -2036751370, now seen corresponding path program 1 times [2022-02-14 21:57:44,524 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:57:44,524 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011347499] [2022-02-14 21:57:44,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:57:44,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:57:44,532 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 21:57:44,532 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1450558057] [2022-02-14 21:57:44,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:57:44,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:57:44,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:57:44,533 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) [2022-02-14 21:57:44,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-14 21:57:44,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:57:44,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-14 21:57:44,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:57:44,854 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-14 21:57:44,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 21:57:45,225 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-14 21:57:45,226 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:57:45,226 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011347499] [2022-02-14 21:57:45,226 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 21:57:45,226 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450558057] [2022-02-14 21:57:45,226 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450558057] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 21:57:45,226 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 21:57:45,226 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2022-02-14 21:57:45,226 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375619366] [2022-02-14 21:57:45,226 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 21:57:45,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-14 21:57:45,227 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:57:45,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-14 21:57:45,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-02-14 21:57:45,227 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand has 22 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 19 states have internal predecessors, (33), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-02-14 21:57:45,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:57:45,680 INFO L93 Difference]: Finished difference Result 82 states and 95 transitions. [2022-02-14 21:57:45,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-14 21:57:45,682 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 19 states have internal predecessors, (33), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 29 [2022-02-14 21:57:45,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:57:45,682 INFO L225 Difference]: With dead ends: 82 [2022-02-14 21:57:45,683 INFO L226 Difference]: Without dead ends: 76 [2022-02-14 21:57:45,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=219, Invalid=1113, Unknown=0, NotChecked=0, Total=1332 [2022-02-14 21:57:45,684 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 30 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 21:57:45,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 241 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 255 Invalid, 0 Unknown, 80 Unchecked, 0.1s Time] [2022-02-14 21:57:45,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-02-14 21:57:45,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 67. [2022-02-14 21:57:45,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 52 states have internal predecessors, (60), 9 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-14 21:57:45,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 76 transitions. [2022-02-14 21:57:45,688 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 76 transitions. Word has length 29 [2022-02-14 21:57:45,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:57:45,688 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 76 transitions. [2022-02-14 21:57:45,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 19 states have internal predecessors, (33), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-02-14 21:57:45,689 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 76 transitions. [2022-02-14 21:57:45,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-14 21:57:45,689 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:57:45,689 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:57:45,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-14 21:57:45,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:57:45,899 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:57:45,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:57:45,900 INFO L85 PathProgramCache]: Analyzing trace with hash -782335822, now seen corresponding path program 1 times [2022-02-14 21:57:45,900 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:57:45,900 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426305732] [2022-02-14 21:57:45,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:57:45,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:57:45,907 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 21:57:45,907 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1036476589] [2022-02-14 21:57:45,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:57:45,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:57:45,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:57:45,908 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) [2022-02-14 21:57:45,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-14 21:57:45,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:57:45,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-14 21:57:45,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:57:46,084 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-14 21:57:46,086 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-14 21:57:48,349 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-02-14 21:57:48,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 21:57:48,614 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-02-14 21:57:48,614 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:57:48,614 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426305732] [2022-02-14 21:57:48,614 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 21:57:48,614 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036476589] [2022-02-14 21:57:48,614 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036476589] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 21:57:48,614 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 21:57:48,614 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2022-02-14 21:57:48,615 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141031549] [2022-02-14 21:57:48,615 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 21:57:48,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-14 21:57:48,615 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:57:48,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-14 21:57:48,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=247, Unknown=1, NotChecked=0, Total=306 [2022-02-14 21:57:48,616 INFO L87 Difference]: Start difference. First operand 67 states and 76 transitions. Second operand has 18 states, 12 states have (on average 2.5) internal successors, (30), 17 states have internal predecessors, (30), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-14 21:57:50,800 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 21:57:54,823 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 21:57:56,833 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 21:57:59,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:57:59,161 INFO L93 Difference]: Finished difference Result 94 states and 111 transitions. [2022-02-14 21:57:59,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-14 21:57:59,162 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 12 states have (on average 2.5) internal successors, (30), 17 states have internal predecessors, (30), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) Word has length 39 [2022-02-14 21:57:59,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:57:59,163 INFO L225 Difference]: With dead ends: 94 [2022-02-14 21:57:59,163 INFO L226 Difference]: Without dead ends: 90 [2022-02-14 21:57:59,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=117, Invalid=432, Unknown=3, NotChecked=0, Total=552 [2022-02-14 21:57:59,164 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 35 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 22 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-02-14 21:57:59,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 153 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 159 Invalid, 3 Unknown, 0 Unchecked, 6.2s Time] [2022-02-14 21:57:59,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-02-14 21:57:59,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2022-02-14 21:57:59,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 70 states have (on average 1.1714285714285715) internal successors, (82), 70 states have internal predecessors, (82), 12 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-14 21:57:59,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 104 transitions. [2022-02-14 21:57:59,172 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 104 transitions. Word has length 39 [2022-02-14 21:57:59,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:57:59,174 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 104 transitions. [2022-02-14 21:57:59,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 12 states have (on average 2.5) internal successors, (30), 17 states have internal predecessors, (30), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-14 21:57:59,174 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 104 transitions. [2022-02-14 21:57:59,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-14 21:57:59,181 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:57:59,181 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:57:59,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-14 21:57:59,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:57:59,384 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:57:59,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:57:59,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1435422131, now seen corresponding path program 1 times [2022-02-14 21:57:59,385 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:57:59,385 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504720442] [2022-02-14 21:57:59,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:57:59,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:57:59,392 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 21:57:59,392 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [62720526] [2022-02-14 21:57:59,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:57:59,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:57:59,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:57:59,393 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) [2022-02-14 21:57:59,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-14 21:57:59,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:57:59,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-14 21:57:59,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:57:59,589 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-14 21:57:59,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 21:57:59,732 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-14 21:57:59,732 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:57:59,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504720442] [2022-02-14 21:57:59,732 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 21:57:59,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62720526] [2022-02-14 21:57:59,732 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62720526] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 21:57:59,734 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 21:57:59,734 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-02-14 21:57:59,735 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156669007] [2022-02-14 21:57:59,735 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 21:57:59,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-14 21:57:59,736 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:57:59,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-14 21:57:59,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-02-14 21:57:59,736 INFO L87 Difference]: Start difference. First operand 88 states and 104 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-14 21:57:59,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:57:59,851 INFO L93 Difference]: Finished difference Result 91 states and 107 transitions. [2022-02-14 21:57:59,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-14 21:57:59,851 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 39 [2022-02-14 21:57:59,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:57:59,852 INFO L225 Difference]: With dead ends: 91 [2022-02-14 21:57:59,852 INFO L226 Difference]: Without dead ends: 91 [2022-02-14 21:57:59,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-02-14 21:57:59,853 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 5 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 21:57:59,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 138 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 21:57:59,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-02-14 21:57:59,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 83. [2022-02-14 21:57:59,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 66 states have (on average 1.1666666666666667) internal successors, (77), 66 states have internal predecessors, (77), 11 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-14 21:57:59,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 97 transitions. [2022-02-14 21:57:59,857 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 97 transitions. Word has length 39 [2022-02-14 21:57:59,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:57:59,857 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 97 transitions. [2022-02-14 21:57:59,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-14 21:57:59,857 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 97 transitions. [2022-02-14 21:57:59,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-02-14 21:57:59,858 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:57:59,858 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:57:59,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-14 21:58:00,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:58:00,072 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:58:00,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:58:00,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1628716144, now seen corresponding path program 2 times [2022-02-14 21:58:00,072 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:58:00,072 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485525956] [2022-02-14 21:58:00,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:58:00,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:58:00,078 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 21:58:00,078 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1372282954] [2022-02-14 21:58:00,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 21:58:00,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:58:00,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:58:00,079 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) [2022-02-14 21:58:00,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-14 21:58:00,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 21:58:00,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 21:58:00,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-14 21:58:00,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:58:00,343 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-14 21:58:00,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 21:58:00,480 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-14 21:58:00,480 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:58:00,480 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485525956] [2022-02-14 21:58:00,480 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 21:58:00,480 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372282954] [2022-02-14 21:58:00,480 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372282954] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 21:58:00,480 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 21:58:00,480 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-02-14 21:58:00,480 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311234926] [2022-02-14 21:58:00,480 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 21:58:00,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-14 21:58:00,481 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:58:00,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-14 21:58:00,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-02-14 21:58:00,482 INFO L87 Difference]: Start difference. First operand 83 states and 97 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-14 21:58:00,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:58:00,616 INFO L93 Difference]: Finished difference Result 102 states and 121 transitions. [2022-02-14 21:58:00,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-14 21:58:00,616 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 49 [2022-02-14 21:58:00,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:58:00,617 INFO L225 Difference]: With dead ends: 102 [2022-02-14 21:58:00,617 INFO L226 Difference]: Without dead ends: 102 [2022-02-14 21:58:00,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-02-14 21:58:00,618 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 8 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 21:58:00,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 179 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 21:58:00,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-02-14 21:58:00,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 89. [2022-02-14 21:58:00,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 71 states have (on average 1.1690140845070423) internal successors, (83), 71 states have internal predecessors, (83), 12 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-14 21:58:00,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 105 transitions. [2022-02-14 21:58:00,622 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 105 transitions. Word has length 49 [2022-02-14 21:58:00,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:58:00,623 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 105 transitions. [2022-02-14 21:58:00,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-14 21:58:00,623 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 105 transitions. [2022-02-14 21:58:00,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-02-14 21:58:00,623 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:58:00,623 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:58:00,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-14 21:58:00,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:58:00,843 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:58:00,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:58:00,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1136439088, now seen corresponding path program 3 times [2022-02-14 21:58:00,843 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:58:00,844 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515399040] [2022-02-14 21:58:00,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:58:00,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:58:00,849 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 21:58:00,849 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [964513566] [2022-02-14 21:58:00,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 21:58:00,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:58:00,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:58:00,851 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) [2022-02-14 21:58:00,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-14 21:58:01,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-14 21:58:01,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 21:58:01,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-14 21:58:01,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:58:01,509 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-14 21:58:01,513 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-14 21:58:01,514 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-14 21:58:07,597 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse3 (+ c_main_~X~0 1)) (.cse2 (+ (* (- 1) c_main_~Y~0) (div (+ c_main_~v~0 c_main_~X~0) 2) (* c_main_~X~0 c_main_~y~0))) (.cse0 (= c_main_~Y~0 0)) (.cse4 (= (mod (+ (* 2 c_main_~X~0 c_main_~y~0) c_main_~v~0 c_main_~X~0) 2) 0))) (or (let ((.cse1 (div .cse2 c_main_~Y~0))) (and (not .cse0) (not (<= .cse1 c_main_~X~0)) (= (mod .cse2 c_main_~Y~0) 0) (= c_main_~xy~0 (* c_main_~y~0 .cse1)) (<= .cse1 .cse3) (= c_main_~yx~0 (* c_main_~Y~0 .cse1)) .cse4)) (and (let ((.cse6 (= c_main_~y~0 0))) (or (let ((.cse5 (div c_main_~xy~0 c_main_~y~0))) (and (<= .cse5 .cse3) (= (mod c_main_~xy~0 c_main_~y~0) 0) (not .cse6) (< c_main_~X~0 .cse5))) (and .cse6 (= c_main_~xy~0 0)))) (= 0 .cse2) .cse0 (= c_main_~yx~0 0) .cse4))) is different from false