/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 19:54:08,839 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 19:54:08,840 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 19:54:08,877 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 19:54:08,890 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-18 19:54:08,891 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-18 19:54:08,892 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-18 19:54:08,894 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-18 19:54:08,895 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-18 19:54:08,895 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-18 19:54:08,897 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-18 19:54:08,901 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-18 19:54:08,903 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-18 19:54:08,904 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-18 19:54:08,904 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-18 19:54:08,905 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-18 19:54:08,906 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-18 19:54:08,911 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-18 19:54:08,916 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 19:54:08,917 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 19:54:08,918 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 19:54:08,918 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-18 19:54:08,929 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 19:54:08,929 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 19:54:08,931 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 19:54:08,931 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-18 19:54:08,931 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 19:54:08,931 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-18 19:54:08,932 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 19:54:08,932 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 19:54:08,932 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 19:54:08,932 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 19:54:08,933 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-18 19:54:08,933 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 19:54:08,933 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 19:54:08,933 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 19:54:08,933 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 19:54:08,933 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 19:54:08,933 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 19:54:08,933 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 19:54:08,933 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 19:54:08,933 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 19:54:08,933 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 19:54:08,934 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-18 19:54:08,934 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 19:54:09,149 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 19:54:09,168 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 19:54:09,170 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 19:54:09,171 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 19:54:09,171 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 19:54:09,172 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound5.c [2022-03-18 19:54:09,227 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/225e51539/cb7eac382be74cfaa3670d25d8cd184d/FLAG5d2e7788b [2022-03-18 19:54:09,632 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 19:54:09,633 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound5.c [2022-03-18 19:54:09,638 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/225e51539/cb7eac382be74cfaa3670d25d8cd184d/FLAG5d2e7788b [2022-03-18 19:54:09,650 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/225e51539/cb7eac382be74cfaa3670d25d8cd184d [2022-03-18 19:54:09,653 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 19:54:09,654 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-18 19:54:09,656 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 19:54:09,656 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 19:54:09,660 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 19:54:09,661 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 07:54:09" (1/1) ... [2022-03-18 19:54:09,662 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@434c7270 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:54:09, skipping insertion in model container [2022-03-18 19:54:09,662 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 07:54:09" (1/1) ... [2022-03-18 19:54:09,667 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 19:54:09,681 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 19:54:09,819 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound5.c[526,539] [2022-03-18 19:54:09,830 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 19:54:09,836 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 19:54:09,846 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound5.c[526,539] [2022-03-18 19:54:09,851 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 19:54:09,862 INFO L208 MainTranslator]: Completed translation [2022-03-18 19:54:09,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:54:09 WrapperNode [2022-03-18 19:54:09,863 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 19:54:09,864 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 19:54:09,864 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 19:54:09,864 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 19:54:09,872 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:54:09" (1/1) ... [2022-03-18 19:54:09,873 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:54:09" (1/1) ... [2022-03-18 19:54:09,877 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:54:09" (1/1) ... [2022-03-18 19:54:09,877 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:54:09" (1/1) ... [2022-03-18 19:54:09,881 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:54:09" (1/1) ... [2022-03-18 19:54:09,884 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:54:09" (1/1) ... [2022-03-18 19:54:09,885 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:54:09" (1/1) ... [2022-03-18 19:54:09,886 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 19:54:09,887 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 19:54:09,887 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 19:54:09,887 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 19:54:09,898 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:54:09" (1/1) ... [2022-03-18 19:54:09,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 19:54:09,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:54:09,923 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-18 19:54:09,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-18 19:54:09,962 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 19:54:09,962 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 19:54:09,963 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 19:54:09,963 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 19:54:09,963 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 19:54:09,963 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 19:54:09,963 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 19:54:09,963 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 19:54:09,963 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 19:54:09,963 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 19:54:09,963 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 19:54:09,963 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 19:54:09,963 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 19:54:09,964 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 19:54:09,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 19:54:09,964 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 19:54:09,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 19:54:09,964 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 19:54:09,964 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 19:54:09,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 19:54:10,008 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 19:54:10,009 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 19:54:10,129 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 19:54:10,134 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 19:54:10,134 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-18 19:54:10,135 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 07:54:10 BoogieIcfgContainer [2022-03-18 19:54:10,135 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 19:54:10,136 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-18 19:54:10,136 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-18 19:54:10,156 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-18 19:54:10,158 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 07:54:10" (1/1) ... [2022-03-18 19:54:10,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 07:54:10 BasicIcfg [2022-03-18 19:54:10,174 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-18 19:54:10,176 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 19:54:10,176 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 19:54:10,179 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 19:54:10,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 07:54:09" (1/4) ... [2022-03-18 19:54:10,180 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@752cef3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 07:54:10, skipping insertion in model container [2022-03-18 19:54:10,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:54:09" (2/4) ... [2022-03-18 19:54:10,180 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@752cef3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 07:54:10, skipping insertion in model container [2022-03-18 19:54:10,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 07:54:10" (3/4) ... [2022-03-18 19:54:10,180 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@752cef3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 07:54:10, skipping insertion in model container [2022-03-18 19:54:10,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 07:54:10" (4/4) ... [2022-03-18 19:54:10,181 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2_unwindbound5.cJordan [2022-03-18 19:54:10,192 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-18 19:54:10,192 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 19:54:10,255 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 19:54:10,267 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-18 19:54:10,268 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 19:54:10,279 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-18 19:54:10,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-18 19:54:10,285 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:54:10,285 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:54:10,286 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:54:10,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:54:10,294 INFO L85 PathProgramCache]: Analyzing trace with hash 121155216, now seen corresponding path program 1 times [2022-03-18 19:54:10,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:54:10,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104923870] [2022-03-18 19:54:10,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:54:10,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:54:10,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:54:10,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 19:54:10,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:54:10,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 19:54:10,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:54:10,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104923870] [2022-03-18 19:54:10,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104923870] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 19:54:10,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 19:54:10,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 19:54:10,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796803639] [2022-03-18 19:54:10,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 19:54:10,501 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 19:54:10,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:54:10,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 19:54:10,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 19:54:10,536 INFO L87 Difference]: Start difference. First operand has 31 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 19:54:10,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:54:10,630 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2022-03-18 19:54:10,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 19:54:10,633 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-18 19:54:10,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:54:10,644 INFO L225 Difference]: With dead ends: 32 [2022-03-18 19:54:10,644 INFO L226 Difference]: Without dead ends: 27 [2022-03-18 19:54:10,646 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 19:54:10,649 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 19:54:10,653 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 44 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 19:54:10,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-18 19:54:10,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-03-18 19:54:10,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 9 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 19:54:10,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2022-03-18 19:54:10,691 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 12 [2022-03-18 19:54:10,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:54:10,691 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2022-03-18 19:54:10,692 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 19:54:10,692 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2022-03-18 19:54:10,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-18 19:54:10,692 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:54:10,693 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:54:10,693 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 19:54:10,693 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:54:10,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:54:10,694 INFO L85 PathProgramCache]: Analyzing trace with hash 152644303, now seen corresponding path program 1 times [2022-03-18 19:54:10,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:54:10,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125749602] [2022-03-18 19:54:10,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:54:10,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:54:10,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:54:10,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 19:54:10,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:54:10,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 19:54:10,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:54:10,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125749602] [2022-03-18 19:54:10,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125749602] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 19:54:10,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 19:54:10,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 19:54:10,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83533709] [2022-03-18 19:54:10,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 19:54:10,783 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 19:54:10,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:54:10,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 19:54:10,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-18 19:54:10,785 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 19:54:10,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:54:10,954 INFO L93 Difference]: Finished difference Result 39 states and 54 transitions. [2022-03-18 19:54:10,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 19:54:10,955 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-18 19:54:10,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:54:10,956 INFO L225 Difference]: With dead ends: 39 [2022-03-18 19:54:10,957 INFO L226 Difference]: Without dead ends: 39 [2022-03-18 19:54:10,957 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-18 19:54:10,958 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 24 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 19:54:10,959 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 91 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 19:54:10,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-18 19:54:10,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2022-03-18 19:54:10,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 19:54:10,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2022-03-18 19:54:10,967 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 12 [2022-03-18 19:54:10,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:54:10,967 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2022-03-18 19:54:10,967 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 19:54:10,967 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2022-03-18 19:54:10,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-18 19:54:10,968 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:54:10,968 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:54:10,968 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 19:54:10,968 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:54:10,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:54:10,970 INFO L85 PathProgramCache]: Analyzing trace with hash -400958603, now seen corresponding path program 1 times [2022-03-18 19:54:10,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:54:10,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800879801] [2022-03-18 19:54:10,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:54:10,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:54:10,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:54:11,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 19:54:11,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:54:11,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 19:54:11,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:54:11,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800879801] [2022-03-18 19:54:11,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800879801] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 19:54:11,035 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 19:54:11,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 19:54:11,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538633056] [2022-03-18 19:54:11,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 19:54:11,036 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 19:54:11,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:54:11,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 19:54:11,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 19:54:11,051 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 19:54:11,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:54:11,112 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2022-03-18 19:54:11,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 19:54:11,112 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-03-18 19:54:11,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:54:11,113 INFO L225 Difference]: With dead ends: 32 [2022-03-18 19:54:11,113 INFO L226 Difference]: Without dead ends: 32 [2022-03-18 19:54:11,113 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 19:54:11,114 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 6 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 19:54:11,114 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 73 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 19:54:11,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-18 19:54:11,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-18 19:54:11,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 19:54:11,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-03-18 19:54:11,120 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 14 [2022-03-18 19:54:11,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:54:11,121 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-03-18 19:54:11,121 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 19:54:11,121 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-03-18 19:54:11,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-18 19:54:11,121 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:54:11,121 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:54:11,122 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-18 19:54:11,122 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:54:11,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:54:11,122 INFO L85 PathProgramCache]: Analyzing trace with hash 185978583, now seen corresponding path program 1 times [2022-03-18 19:54:11,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:54:11,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811186252] [2022-03-18 19:54:11,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:54:11,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:54:11,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:54:11,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 19:54:11,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:54:11,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-18 19:54:11,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:54:11,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 19:54:11,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:54:11,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811186252] [2022-03-18 19:54:11,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811186252] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 19:54:11,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 19:54:11,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 19:54:11,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878233357] [2022-03-18 19:54:11,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 19:54:11,177 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 19:54:11,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:54:11,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 19:54:11,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-18 19:54:11,178 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 19:54:11,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:54:11,287 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2022-03-18 19:54:11,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 19:54:11,288 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-03-18 19:54:11,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:54:11,292 INFO L225 Difference]: With dead ends: 44 [2022-03-18 19:54:11,293 INFO L226 Difference]: Without dead ends: 44 [2022-03-18 19:54:11,294 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-18 19:54:11,306 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 19 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 19:54:11,307 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 84 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 19:54:11,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-18 19:54:11,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2022-03-18 19:54:11,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 23 states have internal predecessors, (28), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 19:54:11,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2022-03-18 19:54:11,311 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 17 [2022-03-18 19:54:11,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:54:11,312 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2022-03-18 19:54:11,312 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 19:54:11,312 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2022-03-18 19:54:11,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-18 19:54:11,312 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:54:11,313 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:54:11,313 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-18 19:54:11,314 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:54:11,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:54:11,315 INFO L85 PathProgramCache]: Analyzing trace with hash -820589269, now seen corresponding path program 1 times [2022-03-18 19:54:11,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:54:11,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646851386] [2022-03-18 19:54:11,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:54:11,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:54:11,338 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:54:11,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1323586162] [2022-03-18 19:54:11,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:54:11,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:54:11,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:54:11,341 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 19:54:11,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 19:54:11,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:54:11,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 19:54:11,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:54:11,579 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 19:54:11,580 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 19:54:11,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:54:11,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646851386] [2022-03-18 19:54:11,580 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:54:11,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323586162] [2022-03-18 19:54:11,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323586162] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 19:54:11,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 19:54:11,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 19:54:11,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374277276] [2022-03-18 19:54:11,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 19:54:11,581 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 19:54:11,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:54:11,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 19:54:11,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 19:54:11,582 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 19:54:11,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:54:11,612 INFO L93 Difference]: Finished difference Result 51 states and 66 transitions. [2022-03-18 19:54:11,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 19:54:11,612 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-03-18 19:54:11,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:54:11,613 INFO L225 Difference]: With dead ends: 51 [2022-03-18 19:54:11,613 INFO L226 Difference]: Without dead ends: 50 [2022-03-18 19:54:11,613 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 19:54:11,614 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 10 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 19:54:11,614 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 131 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 19:54:11,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-18 19:54:11,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-03-18 19:54:11,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 31 states have internal predecessors, (37), 15 states have call successors, (15), 6 states have call predecessors, (15), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-18 19:54:11,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2022-03-18 19:54:11,619 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 22 [2022-03-18 19:54:11,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:54:11,620 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2022-03-18 19:54:11,620 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 19:54:11,620 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2022-03-18 19:54:11,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-18 19:54:11,620 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:54:11,620 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:54:11,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 19:54:11,839 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:54:11,840 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:54:11,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:54:11,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1259710898, now seen corresponding path program 1 times [2022-03-18 19:54:11,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:54:11,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739878777] [2022-03-18 19:54:11,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:54:11,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:54:11,849 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:54:11,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1580989719] [2022-03-18 19:54:11,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:54:11,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:54:11,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:54:11,851 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 19:54:11,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 19:54:11,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:54:11,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 19:54:11,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:54:11,948 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 19:54:11,948 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 19:54:11,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:54:11,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739878777] [2022-03-18 19:54:11,949 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:54:11,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580989719] [2022-03-18 19:54:11,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580989719] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 19:54:11,949 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 19:54:11,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 19:54:11,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621872185] [2022-03-18 19:54:11,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 19:54:11,949 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 19:54:11,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:54:11,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 19:54:11,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-18 19:54:11,950 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 19:54:11,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:54:11,966 INFO L93 Difference]: Finished difference Result 63 states and 73 transitions. [2022-03-18 19:54:11,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 19:54:11,967 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2022-03-18 19:54:11,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:54:11,967 INFO L225 Difference]: With dead ends: 63 [2022-03-18 19:54:11,967 INFO L226 Difference]: Without dead ends: 63 [2022-03-18 19:54:11,968 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-18 19:54:11,968 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 3 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 19:54:11,968 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 124 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 19:54:11,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-18 19:54:11,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2022-03-18 19:54:11,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 40 states have internal predecessors, (45), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-18 19:54:11,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2022-03-18 19:54:11,973 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 30 [2022-03-18 19:54:11,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:54:11,974 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2022-03-18 19:54:11,974 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 19:54:11,974 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2022-03-18 19:54:11,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-18 19:54:11,974 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:54:11,974 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:54:11,994 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-18 19:54:12,187 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-03-18 19:54:12,188 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:54:12,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:54:12,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1260813165, now seen corresponding path program 1 times [2022-03-18 19:54:12,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:54:12,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066644141] [2022-03-18 19:54:12,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:54:12,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:54:12,198 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:54:12,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1274531539] [2022-03-18 19:54:12,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:54:12,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:54:12,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:54:12,210 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 19:54:12,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 19:54:12,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:54:12,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 19:54:12,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:54:12,375 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 19:54:12,375 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 19:54:12,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:54:12,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066644141] [2022-03-18 19:54:12,376 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:54:12,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274531539] [2022-03-18 19:54:12,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274531539] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 19:54:12,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 19:54:12,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 19:54:12,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347268634] [2022-03-18 19:54:12,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 19:54:12,376 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 19:54:12,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:54:12,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 19:54:12,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 19:54:12,377 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 19:54:12,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:54:12,408 INFO L93 Difference]: Finished difference Result 74 states and 89 transitions. [2022-03-18 19:54:12,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 19:54:12,409 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2022-03-18 19:54:12,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:54:12,409 INFO L225 Difference]: With dead ends: 74 [2022-03-18 19:54:12,409 INFO L226 Difference]: Without dead ends: 64 [2022-03-18 19:54:12,410 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 19:54:12,410 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 11 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 19:54:12,411 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 103 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 19:54:12,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-18 19:54:12,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-03-18 19:54:12,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 39 states have (on average 1.2307692307692308) internal successors, (48), 41 states have internal predecessors, (48), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-18 19:54:12,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2022-03-18 19:54:12,415 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 30 [2022-03-18 19:54:12,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:54:12,415 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2022-03-18 19:54:12,415 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 19:54:12,416 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2022-03-18 19:54:12,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-18 19:54:12,416 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:54:12,416 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:54:12,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 19:54:12,627 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:54:12,628 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:54:12,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:54:12,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1811137592, now seen corresponding path program 1 times [2022-03-18 19:54:12,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:54:12,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290837886] [2022-03-18 19:54:12,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:54:12,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:54:12,635 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:54:12,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1902578465] [2022-03-18 19:54:12,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:54:12,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:54:12,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:54:12,642 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 19:54:12,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 19:54:12,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:54:12,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 19:54:12,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:54:12,774 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-03-18 19:54:12,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 19:54:12,877 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-18 19:54:12,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:54:12,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290837886] [2022-03-18 19:54:12,877 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:54:12,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902578465] [2022-03-18 19:54:12,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902578465] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 19:54:12,879 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 19:54:12,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-18 19:54:12,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956766443] [2022-03-18 19:54:12,879 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 19:54:12,880 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 19:54:12,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:54:12,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 19:54:12,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-18 19:54:12,882 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 6 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-18 19:54:12,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:54:12,949 INFO L93 Difference]: Finished difference Result 119 states and 139 transitions. [2022-03-18 19:54:12,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 19:54:12,950 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 6 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 37 [2022-03-18 19:54:12,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:54:12,954 INFO L225 Difference]: With dead ends: 119 [2022-03-18 19:54:12,954 INFO L226 Difference]: Without dead ends: 119 [2022-03-18 19:54:12,955 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-03-18 19:54:12,955 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 41 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 19:54:12,956 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 152 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 19:54:12,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-03-18 19:54:12,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 112. [2022-03-18 19:54:12,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 71 states have (on average 1.2112676056338028) internal successors, (86), 74 states have internal predecessors, (86), 25 states have call successors, (25), 16 states have call predecessors, (25), 15 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2022-03-18 19:54:12,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 133 transitions. [2022-03-18 19:54:12,977 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 133 transitions. Word has length 37 [2022-03-18 19:54:12,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:54:12,978 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 133 transitions. [2022-03-18 19:54:12,978 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 6 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-18 19:54:12,978 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 133 transitions. [2022-03-18 19:54:12,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-18 19:54:12,978 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:54:12,979 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:54:12,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 19:54:13,179 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:54:13,179 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:54:13,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:54:13,180 INFO L85 PathProgramCache]: Analyzing trace with hash -599722260, now seen corresponding path program 1 times [2022-03-18 19:54:13,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:54:13,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461959196] [2022-03-18 19:54:13,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:54:13,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:54:13,187 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:54:13,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1348968585] [2022-03-18 19:54:13,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:54:13,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:54:13,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:54:13,192 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 19:54:13,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 19:54:13,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:54:13,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-18 19:54:13,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:54:13,347 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-18 19:54:13,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 19:54:13,436 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-18 19:54:13,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:54:13,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461959196] [2022-03-18 19:54:13,436 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:54:13,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348968585] [2022-03-18 19:54:13,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348968585] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-18 19:54:13,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 19:54:13,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-03-18 19:54:13,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121550613] [2022-03-18 19:54:13,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 19:54:13,458 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 19:54:13,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:54:13,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 19:54:13,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-18 19:54:13,458 INFO L87 Difference]: Start difference. First operand 112 states and 133 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 19:54:13,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:54:13,495 INFO L93 Difference]: Finished difference Result 127 states and 150 transitions. [2022-03-18 19:54:13,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 19:54:13,496 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2022-03-18 19:54:13,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:54:13,496 INFO L225 Difference]: With dead ends: 127 [2022-03-18 19:54:13,497 INFO L226 Difference]: Without dead ends: 125 [2022-03-18 19:54:13,497 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-18 19:54:13,497 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 11 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 19:54:13,497 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 113 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 19:54:13,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-03-18 19:54:13,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 122. [2022-03-18 19:54:13,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 81 states have internal predecessors, (92), 27 states have call successors, (27), 18 states have call predecessors, (27), 16 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-18 19:54:13,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 143 transitions. [2022-03-18 19:54:13,503 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 143 transitions. Word has length 40 [2022-03-18 19:54:13,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:54:13,503 INFO L478 AbstractCegarLoop]: Abstraction has 122 states and 143 transitions. [2022-03-18 19:54:13,503 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 19:54:13,504 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 143 transitions. [2022-03-18 19:54:13,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-18 19:54:13,504 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:54:13,504 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:54:13,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 19:54:13,725 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:54:13,726 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:54:13,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:54:13,726 INFO L85 PathProgramCache]: Analyzing trace with hash 560903707, now seen corresponding path program 1 times [2022-03-18 19:54:13,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:54:13,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243012555] [2022-03-18 19:54:13,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:54:13,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:54:13,734 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:54:13,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1916326742] [2022-03-18 19:54:13,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:54:13,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:54:13,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:54:13,735 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 19:54:13,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 19:54:13,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:54:13,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 19:54:13,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:54:13,866 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 42 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-18 19:54:13,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 19:54:13,954 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-18 19:54:13,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:54:13,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243012555] [2022-03-18 19:54:13,954 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:54:13,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916326742] [2022-03-18 19:54:13,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916326742] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 19:54:13,954 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 19:54:13,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-03-18 19:54:13,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829817068] [2022-03-18 19:54:13,955 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 19:54:13,955 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 19:54:13,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:54:13,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 19:54:13,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-03-18 19:54:13,955 INFO L87 Difference]: Start difference. First operand 122 states and 143 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 7 states have call successors, (18), 5 states have call predecessors, (18), 5 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-18 19:54:14,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:54:14,025 INFO L93 Difference]: Finished difference Result 177 states and 208 transitions. [2022-03-18 19:54:14,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 19:54:14,026 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 7 states have call successors, (18), 5 states have call predecessors, (18), 5 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 53 [2022-03-18 19:54:14,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:54:14,027 INFO L225 Difference]: With dead ends: 177 [2022-03-18 19:54:14,027 INFO L226 Difference]: Without dead ends: 177 [2022-03-18 19:54:14,027 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-03-18 19:54:14,027 INFO L912 BasicCegarLoop]: 54 mSDtfsCounter, 52 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 19:54:14,028 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 203 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 19:54:14,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-03-18 19:54:14,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 172. [2022-03-18 19:54:14,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 111 states have (on average 1.1801801801801801) internal successors, (131), 117 states have internal predecessors, (131), 39 states have call successors, (39), 23 states have call predecessors, (39), 21 states have return successors, (35), 31 states have call predecessors, (35), 35 states have call successors, (35) [2022-03-18 19:54:14,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 205 transitions. [2022-03-18 19:54:14,035 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 205 transitions. Word has length 53 [2022-03-18 19:54:14,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:54:14,035 INFO L478 AbstractCegarLoop]: Abstraction has 172 states and 205 transitions. [2022-03-18 19:54:14,035 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 7 states have call successors, (18), 5 states have call predecessors, (18), 5 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-18 19:54:14,035 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 205 transitions. [2022-03-18 19:54:14,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-03-18 19:54:14,036 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:54:14,036 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:54:14,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-18 19:54:14,251 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:54:14,252 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:54:14,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:54:14,252 INFO L85 PathProgramCache]: Analyzing trace with hash -453219492, now seen corresponding path program 1 times [2022-03-18 19:54:14,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:54:14,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226157839] [2022-03-18 19:54:14,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:54:14,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:54:14,259 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:54:14,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [306343633] [2022-03-18 19:54:14,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:54:14,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:54:14,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:54:14,261 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 19:54:14,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 19:54:14,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:54:14,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-18 19:54:14,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:54:14,584 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-18 19:54:14,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 19:54:15,490 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-18 19:54:15,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:54:15,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226157839] [2022-03-18 19:54:15,491 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:54:15,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306343633] [2022-03-18 19:54:15,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306343633] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 19:54:15,491 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 19:54:15,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-03-18 19:54:15,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614037881] [2022-03-18 19:54:15,493 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 19:54:15,494 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 19:54:15,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:54:15,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 19:54:15,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-18 19:54:15,495 INFO L87 Difference]: Start difference. First operand 172 states and 205 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 7 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2022-03-18 19:54:19,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:54:19,781 INFO L93 Difference]: Finished difference Result 232 states and 291 transitions. [2022-03-18 19:54:19,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 19:54:19,782 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 7 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) Word has length 62 [2022-03-18 19:54:19,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:54:19,783 INFO L225 Difference]: With dead ends: 232 [2022-03-18 19:54:19,783 INFO L226 Difference]: Without dead ends: 225 [2022-03-18 19:54:19,784 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 112 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-03-18 19:54:19,784 INFO L912 BasicCegarLoop]: 50 mSDtfsCounter, 52 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 19:54:19,784 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 261 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 19:54:19,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-03-18 19:54:19,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 212. [2022-03-18 19:54:19,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 141 states have (on average 1.2198581560283688) internal successors, (172), 147 states have internal predecessors, (172), 45 states have call successors, (45), 26 states have call predecessors, (45), 25 states have return successors, (42), 38 states have call predecessors, (42), 42 states have call successors, (42) [2022-03-18 19:54:19,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 259 transitions. [2022-03-18 19:54:19,792 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 259 transitions. Word has length 62 [2022-03-18 19:54:19,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:54:19,792 INFO L478 AbstractCegarLoop]: Abstraction has 212 states and 259 transitions. [2022-03-18 19:54:19,792 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 7 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2022-03-18 19:54:19,793 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 259 transitions. [2022-03-18 19:54:19,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-18 19:54:19,794 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:54:19,794 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:54:19,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-18 19:54:20,011 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:54:20,012 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:54:20,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:54:20,012 INFO L85 PathProgramCache]: Analyzing trace with hash 929445032, now seen corresponding path program 1 times [2022-03-18 19:54:20,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:54:20,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474714091] [2022-03-18 19:54:20,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:54:20,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:54:20,021 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:54:20,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1843166135] [2022-03-18 19:54:20,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:54:20,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:54:20,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:54:20,023 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 19:54:20,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-18 19:54:20,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:54:20,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-18 19:54:20,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:54:20,482 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 66 proven. 13 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-03-18 19:54:20,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 19:54:20,714 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2022-03-18 19:54:20,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:54:20,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474714091] [2022-03-18 19:54:20,715 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:54:20,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843166135] [2022-03-18 19:54:20,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843166135] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 19:54:20,715 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 19:54:20,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2022-03-18 19:54:20,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518347181] [2022-03-18 19:54:20,715 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 19:54:20,717 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 19:54:20,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:54:20,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 19:54:20,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-03-18 19:54:20,718 INFO L87 Difference]: Start difference. First operand 212 states and 259 transitions. Second operand has 16 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2022-03-18 19:54:21,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:54:21,047 INFO L93 Difference]: Finished difference Result 215 states and 249 transitions. [2022-03-18 19:54:21,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 19:54:21,056 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) Word has length 73 [2022-03-18 19:54:21,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:54:21,057 INFO L225 Difference]: With dead ends: 215 [2022-03-18 19:54:21,057 INFO L226 Difference]: Without dead ends: 184 [2022-03-18 19:54:21,057 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 129 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2022-03-18 19:54:21,058 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 41 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 19:54:21,058 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 261 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 19:54:21,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-03-18 19:54:21,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 173. [2022-03-18 19:54:21,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 114 states have (on average 1.1842105263157894) internal successors, (135), 118 states have internal predecessors, (135), 36 states have call successors, (36), 24 states have call predecessors, (36), 22 states have return successors, (33), 30 states have call predecessors, (33), 33 states have call successors, (33) [2022-03-18 19:54:21,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 204 transitions. [2022-03-18 19:54:21,063 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 204 transitions. Word has length 73 [2022-03-18 19:54:21,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:54:21,063 INFO L478 AbstractCegarLoop]: Abstraction has 173 states and 204 transitions. [2022-03-18 19:54:21,063 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2022-03-18 19:54:21,064 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 204 transitions. [2022-03-18 19:54:21,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-03-18 19:54:21,064 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:54:21,064 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:54:21,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-18 19:54:21,277 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-18 19:54:21,278 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:54:21,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:54:21,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1139963303, now seen corresponding path program 1 times [2022-03-18 19:54:21,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:54:21,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263040338] [2022-03-18 19:54:21,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:54:21,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:54:21,291 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:54:21,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1518836412] [2022-03-18 19:54:21,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:54:21,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:54:21,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:54:21,296 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 19:54:21,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-18 19:54:21,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:54:21,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 19:54:21,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:54:21,571 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-03-18 19:54:21,572 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 19:54:21,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:54:21,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263040338] [2022-03-18 19:54:21,572 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:54:21,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518836412] [2022-03-18 19:54:21,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518836412] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 19:54:21,572 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 19:54:21,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 19:54:21,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754911022] [2022-03-18 19:54:21,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 19:54:21,573 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 19:54:21,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:54:21,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 19:54:21,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-18 19:54:21,574 INFO L87 Difference]: Start difference. First operand 173 states and 204 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-18 19:54:21,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:54:21,607 INFO L93 Difference]: Finished difference Result 172 states and 204 transitions. [2022-03-18 19:54:21,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 19:54:21,608 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 82 [2022-03-18 19:54:21,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:54:21,609 INFO L225 Difference]: With dead ends: 172 [2022-03-18 19:54:21,609 INFO L226 Difference]: Without dead ends: 172 [2022-03-18 19:54:21,609 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-18 19:54:21,610 INFO L912 BasicCegarLoop]: 54 mSDtfsCounter, 27 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 19:54:21,610 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 89 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 19:54:21,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-03-18 19:54:21,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 167. [2022-03-18 19:54:21,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 111 states have (on average 1.1711711711711712) internal successors, (130), 113 states have internal predecessors, (130), 34 states have call successors, (34), 22 states have call predecessors, (34), 21 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2022-03-18 19:54:21,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 196 transitions. [2022-03-18 19:54:21,619 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 196 transitions. Word has length 82 [2022-03-18 19:54:21,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:54:21,620 INFO L478 AbstractCegarLoop]: Abstraction has 167 states and 196 transitions. [2022-03-18 19:54:21,621 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-18 19:54:21,621 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 196 transitions. [2022-03-18 19:54:21,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-18 19:54:21,622 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:54:21,622 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:54:21,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-18 19:54:21,836 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-18 19:54:21,836 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:54:21,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:54:21,836 INFO L85 PathProgramCache]: Analyzing trace with hash -468178091, now seen corresponding path program 2 times [2022-03-18 19:54:21,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:54:21,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433160630] [2022-03-18 19:54:21,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:54:21,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:54:21,843 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:54:21,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1207614474] [2022-03-18 19:54:21,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 19:54:21,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:54:21,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:54:21,848 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 19:54:21,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-18 19:54:21,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 19:54:21,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 19:54:21,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-18 19:54:21,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:54:22,043 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 72 proven. 260 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-03-18 19:54:22,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 19:54:22,160 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 26 proven. 44 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-18 19:54:22,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:54:22,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433160630] [2022-03-18 19:54:22,160 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:54:22,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207614474] [2022-03-18 19:54:22,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207614474] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 19:54:22,160 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 19:54:22,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-03-18 19:54:22,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020608922] [2022-03-18 19:54:22,161 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 19:54:22,161 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 19:54:22,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:54:22,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 19:54:22,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-18 19:54:22,161 INFO L87 Difference]: Start difference. First operand 167 states and 196 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 7 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (27), 6 states have call predecessors, (27), 6 states have call successors, (27) [2022-03-18 19:54:22,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:54:22,221 INFO L93 Difference]: Finished difference Result 169 states and 198 transitions. [2022-03-18 19:54:22,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 19:54:22,222 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 7 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (27), 6 states have call predecessors, (27), 6 states have call successors, (27) Word has length 91 [2022-03-18 19:54:22,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:54:22,223 INFO L225 Difference]: With dead ends: 169 [2022-03-18 19:54:22,223 INFO L226 Difference]: Without dead ends: 169 [2022-03-18 19:54:22,223 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 174 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-03-18 19:54:22,223 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 12 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 19:54:22,224 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 195 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 19:54:22,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-03-18 19:54:22,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2022-03-18 19:54:22,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 113 states have (on average 1.168141592920354) internal successors, (132), 115 states have internal predecessors, (132), 34 states have call successors, (34), 22 states have call predecessors, (34), 21 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2022-03-18 19:54:22,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 198 transitions. [2022-03-18 19:54:22,228 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 198 transitions. Word has length 91 [2022-03-18 19:54:22,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:54:22,228 INFO L478 AbstractCegarLoop]: Abstraction has 169 states and 198 transitions. [2022-03-18 19:54:22,228 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 7 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (27), 6 states have call predecessors, (27), 6 states have call successors, (27) [2022-03-18 19:54:22,228 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 198 transitions. [2022-03-18 19:54:22,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-03-18 19:54:22,229 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:54:22,229 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:54:22,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-18 19:54:22,446 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-18 19:54:22,447 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:54:22,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:54:22,447 INFO L85 PathProgramCache]: Analyzing trace with hash -2091436208, now seen corresponding path program 1 times [2022-03-18 19:54:22,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:54:22,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655487318] [2022-03-18 19:54:22,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:54:22,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:54:22,454 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:54:22,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1747860427] [2022-03-18 19:54:22,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:54:22,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:54:22,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:54:22,459 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 19:54:22,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-18 19:54:22,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:54:22,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-18 19:54:22,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:54:22,898 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 26 proven. 28 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-18 19:54:22,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 19:54:45,831 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 26 proven. 28 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-18 19:54:45,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:54:45,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655487318] [2022-03-18 19:54:45,832 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:54:45,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747860427] [2022-03-18 19:54:45,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747860427] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 19:54:45,832 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 19:54:45,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-03-18 19:54:45,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818456895] [2022-03-18 19:54:45,832 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 19:54:45,832 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 19:54:45,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:54:45,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 19:54:45,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-03-18 19:54:45,833 INFO L87 Difference]: Start difference. First operand 169 states and 198 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 11 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2022-03-18 19:54:55,564 WARN L232 SmtUtils]: Spent 7.30s on a formula simplification. DAG size of input: 209 DAG size of output: 30 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 19:54:58,018 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:55:04,636 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 [] [2022-03-18 19:55:09,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:55:09,442 INFO L93 Difference]: Finished difference Result 233 states and 294 transitions. [2022-03-18 19:55:09,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-18 19:55:09,443 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 11 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) Word has length 94 [2022-03-18 19:55:09,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:55:09,444 INFO L225 Difference]: With dead ends: 233 [2022-03-18 19:55:09,444 INFO L226 Difference]: Without dead ends: 233 [2022-03-18 19:55:09,444 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 171 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=82, Invalid=337, Unknown=1, NotChecked=0, Total=420 [2022-03-18 19:55:09,445 INFO L912 BasicCegarLoop]: 95 mSDtfsCounter, 75 mSDsluCounter, 741 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 95 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 836 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2022-03-18 19:55:09,445 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 836 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 507 Invalid, 2 Unknown, 0 Unchecked, 11.0s Time] [2022-03-18 19:55:09,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-03-18 19:55:09,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 198. [2022-03-18 19:55:09,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 131 states have (on average 1.2061068702290076) internal successors, (158), 135 states have internal predecessors, (158), 44 states have call successors, (44), 23 states have call predecessors, (44), 22 states have return successors, (42), 39 states have call predecessors, (42), 42 states have call successors, (42) [2022-03-18 19:55:09,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 244 transitions. [2022-03-18 19:55:09,450 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 244 transitions. Word has length 94 [2022-03-18 19:55:09,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:55:09,450 INFO L478 AbstractCegarLoop]: Abstraction has 198 states and 244 transitions. [2022-03-18 19:55:09,450 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 11 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2022-03-18 19:55:09,450 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 244 transitions. [2022-03-18 19:55:09,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-03-18 19:55:09,451 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:55:09,451 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:55:09,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-18 19:55:09,658 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-18 19:55:09,658 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:55:09,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:55:09,659 INFO L85 PathProgramCache]: Analyzing trace with hash -2090333941, now seen corresponding path program 2 times [2022-03-18 19:55:09,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:55:09,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829519167] [2022-03-18 19:55:09,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:55:09,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:55:09,665 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:55:09,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1133525603] [2022-03-18 19:55:09,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 19:55:09,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:55:09,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:55:09,669 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 19:55:09,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-18 19:55:09,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 19:55:09,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 19:55:09,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-18 19:55:09,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:55:09,884 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 322 proven. 2 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-18 19:55:09,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 19:55:10,014 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 54 proven. 2 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-18 19:55:10,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:55:10,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829519167] [2022-03-18 19:55:10,014 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:55:10,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133525603] [2022-03-18 19:55:10,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133525603] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 19:55:10,015 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 19:55:10,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2022-03-18 19:55:10,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193653071] [2022-03-18 19:55:10,015 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 19:55:10,015 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 19:55:10,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:55:10,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 19:55:10,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-03-18 19:55:10,016 INFO L87 Difference]: Start difference. First operand 198 states and 244 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 8 states have call successors, (29), 8 states have call predecessors, (29), 7 states have return successors, (27), 6 states have call predecessors, (27), 6 states have call successors, (27) [2022-03-18 19:55:10,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:55:10,102 INFO L93 Difference]: Finished difference Result 165 states and 177 transitions. [2022-03-18 19:55:10,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 19:55:10,103 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 8 states have call successors, (29), 8 states have call predecessors, (29), 7 states have return successors, (27), 6 states have call predecessors, (27), 6 states have call successors, (27) Word has length 94 [2022-03-18 19:55:10,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:55:10,104 INFO L225 Difference]: With dead ends: 165 [2022-03-18 19:55:10,104 INFO L226 Difference]: Without dead ends: 165 [2022-03-18 19:55:10,104 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 179 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2022-03-18 19:55:10,104 INFO L912 BasicCegarLoop]: 86 mSDtfsCounter, 46 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 19:55:10,104 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 213 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 19:55:10,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-03-18 19:55:10,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 152. [2022-03-18 19:55:10,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 102 states have (on average 1.0784313725490196) internal successors, (110), 105 states have internal predecessors, (110), 27 states have call successors, (27), 23 states have call predecessors, (27), 22 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-18 19:55:10,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 162 transitions. [2022-03-18 19:55:10,108 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 162 transitions. Word has length 94 [2022-03-18 19:55:10,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:55:10,108 INFO L478 AbstractCegarLoop]: Abstraction has 152 states and 162 transitions. [2022-03-18 19:55:10,108 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 8 states have call successors, (29), 8 states have call predecessors, (29), 7 states have return successors, (27), 6 states have call predecessors, (27), 6 states have call successors, (27) [2022-03-18 19:55:10,108 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 162 transitions. [2022-03-18 19:55:10,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-03-18 19:55:10,109 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:55:10,109 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:55:10,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-18 19:55:10,321 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-18 19:55:10,322 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:55:10,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:55:10,322 INFO L85 PathProgramCache]: Analyzing trace with hash -952273693, now seen corresponding path program 2 times [2022-03-18 19:55:10,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:55:10,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904569838] [2022-03-18 19:55:10,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:55:10,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:55:10,328 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:55:10,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2069639390] [2022-03-18 19:55:10,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 19:55:10,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:55:10,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:55:10,333 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 19:55:10,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-18 19:55:10,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 19:55:10,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-03-18 19:55:10,376 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 19:55:10,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 19:55:10,422 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 19:55:10,422 INFO L614 BasicCegarLoop]: Counterexample is feasible [2022-03-18 19:55:10,423 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-18 19:55:10,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-18 19:55:10,639 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-18 19:55:10,642 INFO L718 BasicCegarLoop]: Path program histogram: [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:55:10,644 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-18 19:55:10,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 07:55:10 BasicIcfg [2022-03-18 19:55:10,677 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-18 19:55:10,677 INFO L158 Benchmark]: Toolchain (without parser) took 61023.89ms. Allocated memory was 178.3MB in the beginning and 294.6MB in the end (delta: 116.4MB). Free memory was 127.2MB in the beginning and 134.2MB in the end (delta: -7.0MB). Peak memory consumption was 110.4MB. Max. memory is 8.0GB. [2022-03-18 19:55:10,678 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 178.3MB. Free memory is still 143.5MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-18 19:55:10,678 INFO L158 Benchmark]: CACSL2BoogieTranslator took 206.86ms. Allocated memory was 178.3MB in the beginning and 238.0MB in the end (delta: 59.8MB). Free memory was 127.0MB in the beginning and 214.6MB in the end (delta: -87.6MB). Peak memory consumption was 11.2MB. Max. memory is 8.0GB. [2022-03-18 19:55:10,678 INFO L158 Benchmark]: Boogie Preprocessor took 22.62ms. Allocated memory is still 238.0MB. Free memory was 214.6MB in the beginning and 213.2MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-18 19:55:10,678 INFO L158 Benchmark]: RCFGBuilder took 248.55ms. Allocated memory is still 238.0MB. Free memory was 213.2MB in the beginning and 201.7MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-18 19:55:10,678 INFO L158 Benchmark]: IcfgTransformer took 39.06ms. Allocated memory is still 238.0MB. Free memory was 201.7MB in the beginning and 200.6MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-18 19:55:10,678 INFO L158 Benchmark]: TraceAbstraction took 60500.91ms. Allocated memory was 238.0MB in the beginning and 294.6MB in the end (delta: 56.6MB). Free memory was 200.0MB in the beginning and 134.2MB in the end (delta: 65.7MB). Peak memory consumption was 122.3MB. Max. memory is 8.0GB. [2022-03-18 19:55:10,679 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 178.3MB. Free memory is still 143.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 206.86ms. Allocated memory was 178.3MB in the beginning and 238.0MB in the end (delta: 59.8MB). Free memory was 127.0MB in the beginning and 214.6MB in the end (delta: -87.6MB). Peak memory consumption was 11.2MB. Max. memory is 8.0GB. * Boogie Preprocessor took 22.62ms. Allocated memory is still 238.0MB. Free memory was 214.6MB in the beginning and 213.2MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 248.55ms. Allocated memory is still 238.0MB. Free memory was 213.2MB in the beginning and 201.7MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 39.06ms. Allocated memory is still 238.0MB. Free memory was 201.7MB in the beginning and 200.6MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 60500.91ms. Allocated memory was 238.0MB in the beginning and 294.6MB in the end (delta: 56.6MB). Free memory was 200.0MB in the beginning and 134.2MB in the end (delta: 65.7MB). Peak memory consumption was 122.3MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; VAL [\old(counter)=11, counter=0] [L24] int A, B; [L25] int r, d, p, q; [L26] A = __VERIFIER_nondet_int() [L27] B = 1 [L29] r = A [L30] d = B [L31] p = 1 [L32] q = 0 VAL [\old(counter)=0, A=7, B=1, counter=0, d=1, p=1, q=0, r=7] [L34] EXPR counter++ VAL [\old(counter)=0, A=7, B=1, counter=1, counter++=0, d=1, p=1, q=0, r=7] [L34] COND TRUE counter++<5 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L35] RET __VERIFIER_assert(q == 0) VAL [\old(counter)=0, A=7, B=1, counter=1, d=1, p=1, q=0, r=7] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L36] RET __VERIFIER_assert(r == A) VAL [\old(counter)=0, A=7, B=1, counter=1, d=1, p=1, q=0, r=7] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L37] RET __VERIFIER_assert(d == B * p) VAL [\old(counter)=0, A=7, B=1, counter=1, d=1, p=1, q=0, r=7] [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p VAL [\old(counter)=0, A=7, B=1, counter=1, d=2, p=2, q=0, r=7] [L34] EXPR counter++ VAL [\old(counter)=0, A=7, B=1, counter=2, counter++=1, d=2, p=2, q=0, r=7] [L34] COND TRUE counter++<5 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L35] RET __VERIFIER_assert(q == 0) VAL [\old(counter)=0, A=7, B=1, counter=2, d=2, p=2, q=0, r=7] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L36] RET __VERIFIER_assert(r == A) VAL [\old(counter)=0, A=7, B=1, counter=2, d=2, p=2, q=0, r=7] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L37] RET __VERIFIER_assert(d == B * p) VAL [\old(counter)=0, A=7, B=1, counter=2, d=2, p=2, q=0, r=7] [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p VAL [\old(counter)=0, A=7, B=1, counter=2, d=4, p=4, q=0, r=7] [L34] EXPR counter++ VAL [\old(counter)=0, A=7, B=1, counter=3, counter++=2, d=4, p=4, q=0, r=7] [L34] COND TRUE counter++<5 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L35] RET __VERIFIER_assert(q == 0) VAL [\old(counter)=0, A=7, B=1, counter=3, d=4, p=4, q=0, r=7] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L36] RET __VERIFIER_assert(r == A) VAL [\old(counter)=0, A=7, B=1, counter=3, d=4, p=4, q=0, r=7] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L37] RET __VERIFIER_assert(d == B * p) VAL [\old(counter)=0, A=7, B=1, counter=3, d=4, p=4, q=0, r=7] [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p VAL [\old(counter)=0, A=7, B=1, counter=3, d=8, p=8, q=0, r=7] [L34] EXPR counter++ VAL [\old(counter)=0, A=7, B=1, counter=4, counter++=3, d=8, p=8, q=0, r=7] [L34] COND TRUE counter++<5 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L35] RET __VERIFIER_assert(q == 0) VAL [\old(counter)=0, A=7, B=1, counter=4, d=8, p=8, q=0, r=7] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L36] RET __VERIFIER_assert(r == A) VAL [\old(counter)=0, A=7, B=1, counter=4, d=8, p=8, q=0, r=7] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L37] RET __VERIFIER_assert(d == B * p) VAL [\old(counter)=0, A=7, B=1, counter=4, d=8, p=8, q=0, r=7] [L38] COND TRUE !(r >= d) VAL [\old(counter)=0, A=7, B=1, counter=4, d=8, p=8, q=0, r=7] [L44] EXPR counter++ VAL [\old(counter)=0, A=7, B=1, counter=5, counter++=4, d=8, p=8, q=0, r=7] [L44] COND TRUE counter++<5 [L45] CALL __VERIFIER_assert(A == q*B + r) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L45] RET __VERIFIER_assert(A == q*B + r) VAL [\old(counter)=0, A=7, B=1, counter=5, d=8, p=8, q=0, r=7] [L46] CALL __VERIFIER_assert(d == B*p) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L46] RET __VERIFIER_assert(d == B*p) VAL [\old(counter)=0, A=7, B=1, counter=5, d=8, p=8, q=0, r=7] [L48] COND FALSE !(!(p != 1)) [L50] d = d / 2 [L51] p = p / 2 VAL [\old(counter)=0, A=7, B=1, counter=5, d=4, p=4, q=0, r=7] [L52] COND TRUE r >= d [L53] r = r - d [L54] q = q + p VAL [\old(counter)=0, A=7, B=1, counter=5, d=4, p=4, q=4, r=3] [L44] EXPR counter++ VAL [\old(counter)=0, A=7, B=1, counter=6, counter++=5, d=4, p=4, q=4, r=3] [L44] COND FALSE !(counter++<5) [L58] CALL __VERIFIER_assert(A == d*q + r) VAL [\old(cond)=0, \old(counter)=0, counter=6] [L15] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=6] [L17] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 60.4s, OverallIterations: 17, TraceHistogramMax: 15, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 29.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 496 SdHoareTripleChecker+Valid, 12.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 436 mSDsluCounter, 2973 SdHoareTripleChecker+Invalid, 12.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2229 mSDsCounter, 364 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1707 IncrementalHoareTripleChecker+Invalid, 2073 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 364 mSolverCounterUnsat, 744 mSDtfsCounter, 1707 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1301 GetRequests, 1163 SyntacticMatches, 12 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 20.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=212occurred in iteration=11, InterpolantAutomatonStates: 127, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 16 MinimizatonAttempts, 112 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 27.1s InterpolantComputationTime, 861 NumberOfCodeBlocks, 861 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 1283 ConstructedInterpolants, 0 QuantifiedInterpolants, 17980 SizeOfPredicates, 33 NumberOfNonLiveVariables, 2039 ConjunctsInSsa, 183 ConjunctsInUnsatCore, 24 InterpolantComputations, 9 PerfectInterpolantSequences, 3212/3666 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-03-18 19:55:10,707 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...