/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/prodbin-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 08:07:10,962 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 08:07:10,964 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 08:07:10,988 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-06 08:07:10,988 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-06 08:07:10,989 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-06 08:07:10,990 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-06 08:07:11,000 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-06 08:07:11,003 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-06 08:07:11,003 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-06 08:07:11,004 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-06 08:07:11,005 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-06 08:07:11,005 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 08:07:11,006 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 08:07:11,007 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 08:07:11,008 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 08:07:11,008 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 08:07:11,009 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 08:07:11,010 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 08:07:11,012 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 08:07:11,013 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 08:07:11,013 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 08:07:11,014 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 08:07:11,015 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 08:07:11,015 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 08:07:11,017 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 08:07:11,023 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 08:07:11,024 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 08:07:11,031 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 08:07:11,032 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-04-06 08:07:11,044 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 08:07:11,044 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 08:07:11,045 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 08:07:11,045 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 08:07:11,045 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 08:07:11,046 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 08:07:11,046 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 08:07:11,046 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 08:07:11,046 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 08:07:11,047 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 08:07:11,047 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 08:07:11,047 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 08:07:11,047 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 08:07:11,047 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 08:07:11,047 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 08:07:11,047 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 08:07:11,047 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 08:07:11,048 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 08:07:11,048 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 08:07:11,048 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 08:07:11,048 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-06 08:07:11,048 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-06 08:07:11,049 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 08:07:11,279 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 08:07:11,308 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 08:07:11,310 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 08:07:11,311 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 08:07:11,312 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 08:07:11,313 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound50.c [2022-04-06 08:07:11,368 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c5f6a299/1921b7781e2b40369d86e5a25e31cf8f/FLAG8affe732e [2022-04-06 08:07:11,766 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 08:07:11,767 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound50.c [2022-04-06 08:07:11,773 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c5f6a299/1921b7781e2b40369d86e5a25e31cf8f/FLAG8affe732e [2022-04-06 08:07:11,783 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c5f6a299/1921b7781e2b40369d86e5a25e31cf8f [2022-04-06 08:07:11,785 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 08:07:11,786 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-06 08:07:11,788 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 08:07:11,788 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 08:07:11,794 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 08:07:11,795 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 08:07:11" (1/1) ... [2022-04-06 08:07:11,796 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18e064bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:07:11, skipping insertion in model container [2022-04-06 08:07:11,796 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 08:07:11" (1/1) ... [2022-04-06 08:07:11,802 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 08:07:11,812 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 08:07:11,949 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/prodbin-ll_unwindbound50.c[537,550] [2022-04-06 08:07:11,966 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 08:07:11,979 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 08:07:11,990 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/prodbin-ll_unwindbound50.c[537,550] [2022-04-06 08:07:12,005 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 08:07:12,017 INFO L208 MainTranslator]: Completed translation [2022-04-06 08:07:12,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:07:12 WrapperNode [2022-04-06 08:07:12,017 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 08:07:12,018 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 08:07:12,018 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 08:07:12,018 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 08:07:12,028 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:07:12" (1/1) ... [2022-04-06 08:07:12,028 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:07:12" (1/1) ... [2022-04-06 08:07:12,034 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:07:12" (1/1) ... [2022-04-06 08:07:12,035 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:07:12" (1/1) ... [2022-04-06 08:07:12,038 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:07:12" (1/1) ... [2022-04-06 08:07:12,041 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:07:12" (1/1) ... [2022-04-06 08:07:12,042 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:07:12" (1/1) ... [2022-04-06 08:07:12,044 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 08:07:12,044 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 08:07:12,044 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 08:07:12,044 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 08:07:12,046 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:07:12" (1/1) ... [2022-04-06 08:07:12,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 08:07:12,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 08:07:12,072 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) [2022-04-06 08:07:12,074 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 [2022-04-06 08:07:12,102 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 08:07:12,103 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 08:07:12,103 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 08:07:12,103 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 08:07:12,104 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 08:07:12,104 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 08:07:12,104 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 08:07:12,105 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 08:07:12,105 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 08:07:12,106 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 08:07:12,106 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 08:07:12,106 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 08:07:12,107 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 08:07:12,107 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 08:07:12,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 08:07:12,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 08:07:12,110 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 08:07:12,110 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 08:07:12,110 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 08:07:12,110 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 08:07:12,160 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 08:07:12,162 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 08:07:12,292 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 08:07:12,297 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 08:07:12,298 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 08:07:12,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:07:12 BoogieIcfgContainer [2022-04-06 08:07:12,299 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 08:07:12,300 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-06 08:07:12,300 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-06 08:07:12,320 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-06 08:07:12,323 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:07:12" (1/1) ... [2022-04-06 08:07:12,324 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-04-06 08:07:12,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 08:07:12 BasicIcfg [2022-04-06 08:07:12,338 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-06 08:07:12,356 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 08:07:12,356 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 08:07:12,358 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 08:07:12,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 08:07:11" (1/4) ... [2022-04-06 08:07:12,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b164e67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 08:07:12, skipping insertion in model container [2022-04-06 08:07:12,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:07:12" (2/4) ... [2022-04-06 08:07:12,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b164e67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 08:07:12, skipping insertion in model container [2022-04-06 08:07:12,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:07:12" (3/4) ... [2022-04-06 08:07:12,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b164e67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 08:07:12, skipping insertion in model container [2022-04-06 08:07:12,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 08:07:12" (4/4) ... [2022-04-06 08:07:12,361 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_unwindbound50.cJordan [2022-04-06 08:07:12,365 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-04-06 08:07:12,365 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 08:07:12,428 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 08:07:12,435 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 [2022-04-06 08:07:12,436 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 08:07:12,449 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 08:07:12,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 08:07:12,464 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:07:12,464 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:07:12,465 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:07:12,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:07:12,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1957529129, now seen corresponding path program 1 times [2022-04-06 08:07:12,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:07:12,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125400152] [2022-04-06 08:07:12,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:07:12,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:07:12,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:07:12,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 08:07:12,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:07:12,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 08:07:12,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:07:12,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 08:07:12,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:07:12,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125400152] [2022-04-06 08:07:12,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125400152] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 08:07:12,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 08:07:12,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 08:07:12,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602699960] [2022-04-06 08:07:12,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 08:07:12,717 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 08:07:12,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:07:12,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 08:07:12,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 08:07:12,747 INFO L87 Difference]: Start difference. First operand has 30 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 08:07:12,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:07:12,814 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2022-04-06 08:07:12,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 08:07:12,816 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-04-06 08:07:12,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:07:12,825 INFO L225 Difference]: With dead ends: 31 [2022-04-06 08:07:12,825 INFO L226 Difference]: Without dead ends: 26 [2022-04-06 08:07:12,827 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 08:07:12,832 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 08:07:12,833 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 35 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 08:07:12,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-04-06 08:07:12,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-04-06 08:07:12,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 08:07:12,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-04-06 08:07:12,870 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2022-04-06 08:07:12,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:07:12,870 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-04-06 08:07:12,871 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 08:07:12,872 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-04-06 08:07:12,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-06 08:07:12,873 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:07:12,873 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:07:12,873 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 08:07:12,873 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:07:12,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:07:12,874 INFO L85 PathProgramCache]: Analyzing trace with hash 583261658, now seen corresponding path program 1 times [2022-04-06 08:07:12,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:07:12,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240970700] [2022-04-06 08:07:12,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:07:12,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:07:12,914 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 08:07:12,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [362144497] [2022-04-06 08:07:12,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:07:12,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:07:12,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 08:07:12,920 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) [2022-04-06 08:07:12,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 08:07:12,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:07:12,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 08:07:12,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 08:07:13,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 08:07:13,122 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 08:07:13,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:07:13,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240970700] [2022-04-06 08:07:13,123 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 08:07:13,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362144497] [2022-04-06 08:07:13,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362144497] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 08:07:13,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 08:07:13,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 08:07:13,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049133689] [2022-04-06 08:07:13,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 08:07:13,125 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 08:07:13,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:07:13,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 08:07:13,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 08:07:13,126 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 08:07:13,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:07:13,135 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2022-04-06 08:07:13,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 08:07:13,136 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-04-06 08:07:13,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:07:13,137 INFO L225 Difference]: With dead ends: 27 [2022-04-06 08:07:13,137 INFO L226 Difference]: Without dead ends: 27 [2022-04-06 08:07:13,137 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 08:07:13,139 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 08:07:13,139 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 66 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 08:07:13,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-04-06 08:07:13,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-04-06 08:07:13,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 08:07:13,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-04-06 08:07:13,144 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 18 [2022-04-06 08:07:13,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:07:13,144 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-04-06 08:07:13,144 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 08:07:13,144 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-04-06 08:07:13,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-06 08:07:13,145 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:07:13,145 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:07:13,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 08:07:13,359 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:07:13,359 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:07:13,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:07:13,360 INFO L85 PathProgramCache]: Analyzing trace with hash 584363925, now seen corresponding path program 1 times [2022-04-06 08:07:13,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:07:13,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150145602] [2022-04-06 08:07:13,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:07:13,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:07:13,376 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 08:07:13,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1320571198] [2022-04-06 08:07:13,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:07:13,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:07:13,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 08:07:13,379 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) [2022-04-06 08:07:13,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 08:07:13,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:07:13,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 08:07:13,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 08:07:13,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 08:07:13,577 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 08:07:13,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:07:13,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150145602] [2022-04-06 08:07:13,577 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 08:07:13,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320571198] [2022-04-06 08:07:13,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320571198] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 08:07:13,578 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 08:07:13,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 08:07:13,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029280548] [2022-04-06 08:07:13,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 08:07:13,579 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 08:07:13,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:07:13,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 08:07:13,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 08:07:13,582 INFO L87 Difference]: Start difference. First operand 27 states and 30 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 08:07:13,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:07:13,640 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2022-04-06 08:07:13,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 08:07:13,642 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-04-06 08:07:13,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:07:13,644 INFO L225 Difference]: With dead ends: 36 [2022-04-06 08:07:13,644 INFO L226 Difference]: Without dead ends: 36 [2022-04-06 08:07:13,645 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 08:07:13,645 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 8 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 08:07:13,646 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 78 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 08:07:13,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-04-06 08:07:13,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2022-04-06 08:07:13,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 08:07:13,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-04-06 08:07:13,651 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 18 [2022-04-06 08:07:13,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:07:13,652 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-04-06 08:07:13,652 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 08:07:13,652 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-04-06 08:07:13,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-06 08:07:13,653 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:07:13,653 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:07:13,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 08:07:13,855 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,SelfDestructingSolverStorable2 [2022-04-06 08:07:13,856 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:07:13,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:07:13,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1698322804, now seen corresponding path program 1 times [2022-04-06 08:07:13,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:07:13,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730046202] [2022-04-06 08:07:13,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:07:13,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:07:13,867 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 08:07:13,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1490513766] [2022-04-06 08:07:13,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:07:13,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:07:13,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 08:07:13,868 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) [2022-04-06 08:07:13,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 08:07:13,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:07:13,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 08:07:13,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 08:07:14,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 08:07:14,003 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 08:07:14,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:07:14,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730046202] [2022-04-06 08:07:14,004 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 08:07:14,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490513766] [2022-04-06 08:07:14,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490513766] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 08:07:14,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 08:07:14,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 08:07:14,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473390220] [2022-04-06 08:07:14,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 08:07:14,005 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 08:07:14,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:07:14,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 08:07:14,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 08:07:14,006 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 08:07:14,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:07:14,045 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2022-04-06 08:07:14,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 08:07:14,046 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-04-06 08:07:14,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:07:14,047 INFO L225 Difference]: With dead ends: 35 [2022-04-06 08:07:14,047 INFO L226 Difference]: Without dead ends: 35 [2022-04-06 08:07:14,047 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-06 08:07:14,048 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 17 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 08:07:14,048 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 88 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 08:07:14,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-04-06 08:07:14,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2022-04-06 08:07:14,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 08:07:14,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2022-04-06 08:07:14,053 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 24 [2022-04-06 08:07:14,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:07:14,053 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2022-04-06 08:07:14,053 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 08:07:14,053 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2022-04-06 08:07:14,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 08:07:14,054 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:07:14,054 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:07:14,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 08:07:14,275 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:07:14,276 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:07:14,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:07:14,276 INFO L85 PathProgramCache]: Analyzing trace with hash 919545147, now seen corresponding path program 1 times [2022-04-06 08:07:14,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:07:14,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590532685] [2022-04-06 08:07:14,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:07:14,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:07:14,288 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 08:07:14,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [115661911] [2022-04-06 08:07:14,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:07:14,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:07:14,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 08:07:14,291 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) [2022-04-06 08:07:14,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 08:07:14,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:07:14,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 08:07:14,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 08:07:14,414 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 08:07:14,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 08:07:14,518 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 08:07:14,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:07:14,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590532685] [2022-04-06 08:07:14,518 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 08:07:14,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115661911] [2022-04-06 08:07:14,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115661911] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 08:07:14,518 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 08:07:14,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-04-06 08:07:14,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640807091] [2022-04-06 08:07:14,519 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 08:07:14,519 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 08:07:14,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:07:14,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 08:07:14,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-04-06 08:07:14,520 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-04-06 08:07:14,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:07:14,573 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2022-04-06 08:07:14,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 08:07:14,573 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 28 [2022-04-06 08:07:14,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:07:14,574 INFO L225 Difference]: With dead ends: 63 [2022-04-06 08:07:14,574 INFO L226 Difference]: Without dead ends: 63 [2022-04-06 08:07:14,575 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-04-06 08:07:14,575 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 52 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 08:07:14,576 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 99 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 08:07:14,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-04-06 08:07:14,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2022-04-06 08:07:14,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 45 states have internal predecessors, (53), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 08:07:14,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2022-04-06 08:07:14,582 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 28 [2022-04-06 08:07:14,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:07:14,583 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2022-04-06 08:07:14,583 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-04-06 08:07:14,583 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2022-04-06 08:07:14,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 08:07:14,584 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:07:14,584 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:07:14,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 08:07:14,799 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:07:14,800 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:07:14,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:07:14,800 INFO L85 PathProgramCache]: Analyzing trace with hash 920647414, now seen corresponding path program 1 times [2022-04-06 08:07:14,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:07:14,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356233833] [2022-04-06 08:07:14,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:07:14,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:07:14,810 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 08:07:14,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1530579082] [2022-04-06 08:07:14,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:07:14,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:07:14,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 08:07:14,812 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) [2022-04-06 08:07:14,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 08:07:14,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:07:14,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 08:07:14,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 08:07:15,271 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 08:07:15,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 08:07:22,028 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 08:07:22,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:07:22,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356233833] [2022-04-06 08:07:22,028 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 08:07:22,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530579082] [2022-04-06 08:07:22,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530579082] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 08:07:22,029 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 08:07:22,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2022-04-06 08:07:22,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316270709] [2022-04-06 08:07:22,029 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 08:07:22,029 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 08:07:22,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:07:22,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 08:07:22,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-04-06 08:07:22,032 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 08:07:24,053 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 [] [2022-04-06 08:07:27,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:07:27,180 INFO L93 Difference]: Finished difference Result 92 states and 105 transitions. [2022-04-06 08:07:27,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 08:07:27,181 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-04-06 08:07:27,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:07:27,183 INFO L225 Difference]: With dead ends: 92 [2022-04-06 08:07:27,183 INFO L226 Difference]: Without dead ends: 92 [2022-04-06 08:07:27,183 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2022-04-06 08:07:27,184 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 40 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 17 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-04-06 08:07:27,184 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 145 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 165 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2022-04-06 08:07:27,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-04-06 08:07:27,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 88. [2022-04-06 08:07:27,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 70 states have internal predecessors, (79), 13 states have call successors, (13), 10 states have call predecessors, (13), 9 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 08:07:27,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 101 transitions. [2022-04-06 08:07:27,195 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 101 transitions. Word has length 28 [2022-04-06 08:07:27,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:07:27,195 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 101 transitions. [2022-04-06 08:07:27,195 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 08:07:27,195 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 101 transitions. [2022-04-06 08:07:27,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 08:07:27,196 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:07:27,196 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:07:27,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 08:07:27,403 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:07:27,404 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:07:27,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:07:27,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1631509547, now seen corresponding path program 1 times [2022-04-06 08:07:27,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:07:27,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69133384] [2022-04-06 08:07:27,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:07:27,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:07:27,419 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 08:07:27,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [981236312] [2022-04-06 08:07:27,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:07:27,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:07:27,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 08:07:27,423 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) [2022-04-06 08:07:27,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 08:07:27,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:07:27,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 08:07:27,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 08:07:28,746 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 08:07:28,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 08:07:29,516 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 08:07:29,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:07:29,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69133384] [2022-04-06 08:07:29,517 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 08:07:29,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981236312] [2022-04-06 08:07:29,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981236312] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 08:07:29,517 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 08:07:29,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2022-04-06 08:07:29,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689848404] [2022-04-06 08:07:29,518 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 08:07:29,518 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 08:07:29,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:07:29,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 08:07:29,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-04-06 08:07:29,519 INFO L87 Difference]: Start difference. First operand 88 states and 101 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 17 states have internal predecessors, (32), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-06 08:07:30,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:07:30,584 INFO L93 Difference]: Finished difference Result 116 states and 128 transitions. [2022-04-06 08:07:30,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 08:07:30,584 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 17 states have internal predecessors, (32), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 28 [2022-04-06 08:07:30,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:07:30,586 INFO L225 Difference]: With dead ends: 116 [2022-04-06 08:07:30,586 INFO L226 Difference]: Without dead ends: 112 [2022-04-06 08:07:30,586 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2022-04-06 08:07:30,587 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 77 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 08:07:30,587 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 135 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 08:07:30,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-04-06 08:07:30,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 91. [2022-04-06 08:07:30,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 69 states have (on average 1.1884057971014492) internal successors, (82), 71 states have internal predecessors, (82), 12 states have call successors, (12), 11 states have call predecessors, (12), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 08:07:30,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 103 transitions. [2022-04-06 08:07:30,596 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 103 transitions. Word has length 28 [2022-04-06 08:07:30,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:07:30,596 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 103 transitions. [2022-04-06 08:07:30,596 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 17 states have internal predecessors, (32), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-06 08:07:30,596 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 103 transitions. [2022-04-06 08:07:30,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 08:07:30,597 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:07:30,597 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:07:30,619 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-04-06 08:07:30,811 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:07:30,811 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:07:30,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:07:30,812 INFO L85 PathProgramCache]: Analyzing trace with hash -357510123, now seen corresponding path program 1 times [2022-04-06 08:07:30,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:07:30,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593732989] [2022-04-06 08:07:30,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:07:30,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:07:30,821 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 08:07:30,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2133417923] [2022-04-06 08:07:30,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:07:30,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:07:30,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 08:07:30,822 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) [2022-04-06 08:07:30,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 08:07:30,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:07:30,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 08:07:30,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 08:07:30,973 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 08:07:30,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 08:07:31,090 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 08:07:31,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:07:31,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593732989] [2022-04-06 08:07:31,091 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 08:07:31,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133417923] [2022-04-06 08:07:31,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133417923] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 08:07:31,091 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 08:07:31,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-04-06 08:07:31,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469485006] [2022-04-06 08:07:31,092 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 08:07:31,092 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 08:07:31,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:07:31,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 08:07:31,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-04-06 08:07:31,093 INFO L87 Difference]: Start difference. First operand 91 states and 103 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-06 08:07:33,099 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 [] [2022-04-06 08:07:33,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:07:33,205 INFO L93 Difference]: Finished difference Result 98 states and 108 transitions. [2022-04-06 08:07:33,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 08:07:33,205 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2022-04-06 08:07:33,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:07:33,206 INFO L225 Difference]: With dead ends: 98 [2022-04-06 08:07:33,206 INFO L226 Difference]: Without dead ends: 90 [2022-04-06 08:07:33,206 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-04-06 08:07:33,207 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 22 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-04-06 08:07:33,207 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 92 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-04-06 08:07:33,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-04-06 08:07:33,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2022-04-06 08:07:33,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 67 states have (on average 1.1343283582089552) internal successors, (76), 69 states have internal predecessors, (76), 11 states have call successors, (11), 10 states have call predecessors, (11), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 08:07:33,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 96 transitions. [2022-04-06 08:07:33,214 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 96 transitions. Word has length 34 [2022-04-06 08:07:33,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:07:33,214 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 96 transitions. [2022-04-06 08:07:33,214 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-06 08:07:33,214 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 96 transitions. [2022-04-06 08:07:33,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-06 08:07:33,215 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:07:33,216 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:07:33,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 08:07:33,438 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:07:33,439 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:07:33,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:07:33,439 INFO L85 PathProgramCache]: Analyzing trace with hash 199111383, now seen corresponding path program 1 times [2022-04-06 08:07:33,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:07:33,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388196616] [2022-04-06 08:07:33,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:07:33,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:07:33,448 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 08:07:33,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [988273988] [2022-04-06 08:07:33,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:07:33,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:07:33,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 08:07:33,450 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) [2022-04-06 08:07:33,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 08:07:33,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:07:33,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 42 conjunts are in the unsatisfiable core [2022-04-06 08:07:33,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 08:07:36,730 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 08:08:09,844 WARN L232 SmtUtils]: Spent 16.14s on a formula simplification. DAG size of input: 64 DAG size of output: 50 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 08:12:06,606 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 08:12:06,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 08:12:08,831 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 08:12:12,053 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 29 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-04-06 08:12:12,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:12:12,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388196616] [2022-04-06 08:12:12,054 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 08:12:12,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988273988] [2022-04-06 08:12:12,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988273988] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 08:12:12,054 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 08:12:12,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11] total 24 [2022-04-06 08:12:12,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65637695] [2022-04-06 08:12:12,054 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 08:12:12,055 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 08:12:12,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:12:12,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 08:12:12,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=456, Unknown=2, NotChecked=0, Total=552 [2022-04-06 08:12:12,056 INFO L87 Difference]: Start difference. First operand 88 states and 96 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 22 states have internal predecessors, (50), 7 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-04-06 08:12:14,904 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 [] [2022-04-06 08:13:28,468 WARN L232 SmtUtils]: Spent 1.18m on a formula simplification. DAG size of input: 68 DAG size of output: 67 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 08:13:29,776 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 08:13:57,271 WARN L232 SmtUtils]: Spent 22.32s on a formula simplification that was a NOOP. DAG size: 63 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 08:13:59,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:13:59,229 INFO L93 Difference]: Finished difference Result 127 states and 142 transitions. [2022-04-06 08:13:59,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 08:13:59,229 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 22 states have internal predecessors, (50), 7 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 48 [2022-04-06 08:13:59,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:13:59,231 INFO L225 Difference]: With dead ends: 127 [2022-04-06 08:13:59,231 INFO L226 Difference]: Without dead ends: 127 [2022-04-06 08:13:59,231 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 129.5s TimeCoverageRelationStatistics Valid=187, Invalid=932, Unknown=3, NotChecked=0, Total=1122 [2022-04-06 08:13:59,232 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 44 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 25 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-04-06 08:13:59,232 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 314 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 385 Invalid, 1 Unknown, 35 Unchecked, 5.6s Time] [2022-04-06 08:13:59,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-04-06 08:13:59,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 111. [2022-04-06 08:13:59,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 86 states have (on average 1.1511627906976745) internal successors, (99), 89 states have internal predecessors, (99), 14 states have call successors, (14), 11 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 08:13:59,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 125 transitions. [2022-04-06 08:13:59,242 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 125 transitions. Word has length 48 [2022-04-06 08:13:59,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:13:59,242 INFO L478 AbstractCegarLoop]: Abstraction has 111 states and 125 transitions. [2022-04-06 08:13:59,243 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 22 states have internal predecessors, (50), 7 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-04-06 08:13:59,243 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 125 transitions. [2022-04-06 08:13:59,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-06 08:13:59,244 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:13:59,244 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:13:59,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 08:13:59,459 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,SelfDestructingSolverStorable8 [2022-04-06 08:13:59,460 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:13:59,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:13:59,460 INFO L85 PathProgramCache]: Analyzing trace with hash -831185954, now seen corresponding path program 2 times [2022-04-06 08:13:59,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:13:59,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423084686] [2022-04-06 08:13:59,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:13:59,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:13:59,473 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 08:13:59,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1017245143] [2022-04-06 08:13:59,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 08:13:59,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:13:59,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 08:13:59,474 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) [2022-04-06 08:13:59,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 08:13:59,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 08:13:59,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 08:13:59,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 08:13:59,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 08:13:59,824 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 08:13:59,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 08:14:00,107 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 44 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 08:14:00,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:14:00,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423084686] [2022-04-06 08:14:00,107 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 08:14:00,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017245143] [2022-04-06 08:14:00,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017245143] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 08:14:00,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 08:14:00,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-04-06 08:14:00,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066185762] [2022-04-06 08:14:00,108 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 08:14:00,108 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 08:14:00,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:14:00,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 08:14:00,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-04-06 08:14:00,109 INFO L87 Difference]: Start difference. First operand 111 states and 125 transitions. Second operand has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 12 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2022-04-06 08:14:00,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:14:00,448 INFO L93 Difference]: Finished difference Result 308 states and 340 transitions. [2022-04-06 08:14:00,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 08:14:00,448 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 12 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) Word has length 58 [2022-04-06 08:14:00,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:14:00,451 INFO L225 Difference]: With dead ends: 308 [2022-04-06 08:14:00,451 INFO L226 Difference]: Without dead ends: 308 [2022-04-06 08:14:00,452 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-04-06 08:14:00,452 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 122 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 08:14:00,452 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 203 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 08:14:00,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-04-06 08:14:00,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 298. [2022-04-06 08:14:00,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 233 states have (on average 1.128755364806867) internal successors, (263), 247 states have internal predecessors, (263), 37 states have call successors, (37), 28 states have call predecessors, (37), 27 states have return successors, (35), 22 states have call predecessors, (35), 35 states have call successors, (35) [2022-04-06 08:14:00,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 335 transitions. [2022-04-06 08:14:00,476 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 335 transitions. Word has length 58 [2022-04-06 08:14:00,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:14:00,476 INFO L478 AbstractCegarLoop]: Abstraction has 298 states and 335 transitions. [2022-04-06 08:14:00,476 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 12 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2022-04-06 08:14:00,476 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 335 transitions. [2022-04-06 08:14:00,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-06 08:14:00,478 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:14:00,478 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:14:00,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 08:14:00,691 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,SelfDestructingSolverStorable9 [2022-04-06 08:14:00,691 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:14:00,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:14:00,692 INFO L85 PathProgramCache]: Analyzing trace with hash -339082250, now seen corresponding path program 2 times [2022-04-06 08:14:00,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:14:00,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595486919] [2022-04-06 08:14:00,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:14:00,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:14:00,701 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 08:14:00,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [449476818] [2022-04-06 08:14:00,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 08:14:00,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:14:00,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 08:14:00,711 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) [2022-04-06 08:14:00,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 08:14:00,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 08:14:00,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 08:14:00,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 08:14:00,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 08:14:02,835 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 08:14:04,767 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 16 proven. 49 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 08:14:04,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 08:14:09,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:14:09,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595486919] [2022-04-06 08:14:09,196 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 08:14:09,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449476818] [2022-04-06 08:14:09,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449476818] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 08:14:09,196 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 08:14:09,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-04-06 08:14:09,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528448535] [2022-04-06 08:14:09,197 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-06 08:14:09,197 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 08:14:09,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:14:09,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 08:14:09,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2022-04-06 08:14:09,198 INFO L87 Difference]: Start difference. First operand 298 states and 335 transitions. Second operand has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 21 states have internal predecessors, (38), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-04-06 08:14:12,160 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 [] [2022-04-06 08:14:14,251 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 [] [2022-04-06 08:14:14,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:14:14,872 INFO L93 Difference]: Finished difference Result 321 states and 363 transitions. [2022-04-06 08:14:14,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 08:14:14,873 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 21 states have internal predecessors, (38), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 58 [2022-04-06 08:14:14,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:14:14,875 INFO L225 Difference]: With dead ends: 321 [2022-04-06 08:14:14,875 INFO L226 Difference]: Without dead ends: 321 [2022-04-06 08:14:14,875 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 08:14:14,876 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 40 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 12 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-04-06 08:14:14,876 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 282 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 502 Invalid, 2 Unknown, 49 Unchecked, 5.3s Time] [2022-04-06 08:14:14,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-04-06 08:14:14,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 318. [2022-04-06 08:14:14,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 249 states have (on average 1.1285140562248996) internal successors, (281), 264 states have internal predecessors, (281), 40 states have call successors, (40), 29 states have call predecessors, (40), 28 states have return successors, (38), 24 states have call predecessors, (38), 38 states have call successors, (38) [2022-04-06 08:14:14,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 359 transitions. [2022-04-06 08:14:14,896 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 359 transitions. Word has length 58 [2022-04-06 08:14:14,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:14:14,896 INFO L478 AbstractCegarLoop]: Abstraction has 318 states and 359 transitions. [2022-04-06 08:14:14,896 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 21 states have internal predecessors, (38), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-04-06 08:14:14,896 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 359 transitions. [2022-04-06 08:14:14,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-06 08:14:14,898 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:14:14,898 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:14:14,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 08:14:15,111 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,SelfDestructingSolverStorable10 [2022-04-06 08:14:15,112 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:14:15,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:14:15,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1548458294, now seen corresponding path program 3 times [2022-04-06 08:14:15,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:14:15,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030980755] [2022-04-06 08:14:15,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:14:15,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:14:15,120 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 08:14:15,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [976109223] [2022-04-06 08:14:15,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 08:14:15,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:14:15,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 08:14:15,125 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) [2022-04-06 08:14:15,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 08:14:15,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-04-06 08:14:15,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 08:14:15,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-06 08:14:15,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 08:14:18,123 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 08:14:22,068 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 54 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-04-06 08:14:22,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 08:14:27,335 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 46 proven. 14 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 08:14:27,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:14:27,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030980755] [2022-04-06 08:14:27,336 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 08:14:27,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976109223] [2022-04-06 08:14:27,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976109223] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 08:14:27,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 08:14:27,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-04-06 08:14:27,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240197665] [2022-04-06 08:14:27,337 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 08:14:27,337 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 08:14:27,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:14:27,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 08:14:27,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=268, Unknown=4, NotChecked=0, Total=342 [2022-04-06 08:14:27,338 INFO L87 Difference]: Start difference. First operand 318 states and 359 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-04-06 08:14:33,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:14:33,788 INFO L93 Difference]: Finished difference Result 406 states and 455 transitions. [2022-04-06 08:14:33,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 08:14:33,789 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 58 [2022-04-06 08:14:33,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:14:33,791 INFO L225 Difference]: With dead ends: 406 [2022-04-06 08:14:33,791 INFO L226 Difference]: Without dead ends: 406 [2022-04-06 08:14:33,791 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=130, Invalid=466, Unknown=4, NotChecked=0, Total=600 [2022-04-06 08:14:33,792 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 44 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-04-06 08:14:33,792 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 182 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 178 Invalid, 0 Unknown, 4 Unchecked, 4.6s Time] [2022-04-06 08:14:33,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2022-04-06 08:14:33,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 210. [2022-04-06 08:14:33,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 165 states have (on average 1.1575757575757575) internal successors, (191), 166 states have internal predecessors, (191), 23 states have call successors, (23), 22 states have call predecessors, (23), 21 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-04-06 08:14:33,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 235 transitions. [2022-04-06 08:14:33,802 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 235 transitions. Word has length 58 [2022-04-06 08:14:33,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:14:33,803 INFO L478 AbstractCegarLoop]: Abstraction has 210 states and 235 transitions. [2022-04-06 08:14:33,803 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-04-06 08:14:33,803 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 235 transitions. [2022-04-06 08:14:33,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 08:14:33,804 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:14:33,804 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:14:33,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 08:14:34,011 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,SelfDestructingSolverStorable11 [2022-04-06 08:14:34,012 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:14:34,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:14:34,012 INFO L85 PathProgramCache]: Analyzing trace with hash 680514773, now seen corresponding path program 2 times [2022-04-06 08:14:34,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:14:34,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826979235] [2022-04-06 08:14:34,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:14:34,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:14:34,021 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 08:14:34,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [186276909] [2022-04-06 08:14:34,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 08:14:34,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:14:34,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 08:14:34,022 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) [2022-04-06 08:14:34,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 08:14:34,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 08:14:34,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 08:14:34,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 46 conjunts are in the unsatisfiable core [2022-04-06 08:14:34,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 08:16:58,966 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 9 proven. 88 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 08:16:58,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 08:17:44,995 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 9 proven. 88 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 08:17:44,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:17:44,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826979235] [2022-04-06 08:17:44,996 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 08:17:44,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186276909] [2022-04-06 08:17:44,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186276909] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 08:17:44,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 08:17:44,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2022-04-06 08:17:44,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477521012] [2022-04-06 08:17:44,997 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 08:17:44,997 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-04-06 08:17:44,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:17:44,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-04-06 08:17:44,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1045, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 08:17:44,998 INFO L87 Difference]: Start difference. First operand 210 states and 235 transitions. Second operand has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 33 states have internal predecessors, (75), 13 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13) [2022-04-06 08:17:55,571 WARN L232 SmtUtils]: Spent 7.99s on a formula simplification. DAG size of input: 550 DAG size of output: 32 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 08:17:57,553 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 08:17:58,722 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 08:18:33,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:18:33,947 INFO L93 Difference]: Finished difference Result 435 states and 519 transitions. [2022-04-06 08:18:33,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 08:18:33,948 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 33 states have internal predecessors, (75), 13 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13) Word has length 68 [2022-04-06 08:18:33,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:18:33,950 INFO L225 Difference]: With dead ends: 435 [2022-04-06 08:18:33,950 INFO L226 Difference]: Without dead ends: 435 [2022-04-06 08:18:33,951 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 54.6s TimeCoverageRelationStatistics Valid=499, Invalid=2051, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 08:18:33,952 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 151 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 952 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 1102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.2s IncrementalHoareTripleChecker+Time [2022-04-06 08:18:33,952 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 447 Invalid, 1102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 952 Invalid, 0 Unknown, 0 Unchecked, 14.2s Time] [2022-04-06 08:18:33,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2022-04-06 08:18:33,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 227. [2022-04-06 08:18:33,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 178 states have (on average 1.146067415730337) internal successors, (204), 180 states have internal predecessors, (204), 26 states have call successors, (26), 23 states have call predecessors, (26), 22 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-06 08:18:33,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 254 transitions. [2022-04-06 08:18:33,962 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 254 transitions. Word has length 68 [2022-04-06 08:18:33,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:18:33,963 INFO L478 AbstractCegarLoop]: Abstraction has 227 states and 254 transitions. [2022-04-06 08:18:33,963 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 33 states have internal predecessors, (75), 13 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13) [2022-04-06 08:18:33,963 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 254 transitions. [2022-04-06 08:18:33,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-04-06 08:18:33,965 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:18:33,965 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:18:33,985 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-04-06 08:18:34,179 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,SelfDestructingSolverStorable12 [2022-04-06 08:18:34,179 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:18:34,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:18:34,180 INFO L85 PathProgramCache]: Analyzing trace with hash -2092549276, now seen corresponding path program 3 times [2022-04-06 08:18:34,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:18:34,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146729810] [2022-04-06 08:18:34,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:18:34,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:18:34,196 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 08:18:34,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [150811639] [2022-04-06 08:18:34,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 08:18:34,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:18:34,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 08:18:34,216 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) [2022-04-06 08:18:34,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 08:18:34,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-04-06 08:18:34,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 08:18:34,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 08:18:34,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 08:18:35,039 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 20 proven. 470 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 08:18:35,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 08:18:35,882 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 20 proven. 290 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-06 08:18:35,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:18:35,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146729810] [2022-04-06 08:18:35,882 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 08:18:35,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150811639] [2022-04-06 08:18:35,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150811639] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 08:18:35,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 08:18:35,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-04-06 08:18:35,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199112701] [2022-04-06 08:18:35,883 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 08:18:35,883 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 08:18:35,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:18:35,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 08:18:35,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-04-06 08:18:35,884 INFO L87 Difference]: Start difference. First operand 227 states and 254 transitions. Second operand has 26 states, 26 states have (on average 5.923076923076923) internal successors, (154), 26 states have internal predecessors, (154), 24 states have call successors, (26), 14 states have call predecessors, (26), 13 states have return successors, (24), 22 states have call predecessors, (24), 23 states have call successors, (24) [2022-04-06 08:18:36,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:18:36,815 INFO L93 Difference]: Finished difference Result 468 states and 513 transitions. [2022-04-06 08:18:36,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-04-06 08:18:36,815 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.923076923076923) internal successors, (154), 26 states have internal predecessors, (154), 24 states have call successors, (26), 14 states have call predecessors, (26), 13 states have return successors, (24), 22 states have call predecessors, (24), 23 states have call successors, (24) Word has length 118 [2022-04-06 08:18:36,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:18:36,817 INFO L225 Difference]: With dead ends: 468 [2022-04-06 08:18:36,817 INFO L226 Difference]: Without dead ends: 468 [2022-04-06 08:18:36,818 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=796, Invalid=1366, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 08:18:36,819 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 335 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 08:18:36,819 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 325 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 08:18:36,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2022-04-06 08:18:36,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 450. [2022-04-06 08:18:36,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 357 states have (on average 1.1540616246498598) internal successors, (412), 358 states have internal predecessors, (412), 47 states have call successors, (47), 46 states have call predecessors, (47), 45 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2022-04-06 08:18:36,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 504 transitions. [2022-04-06 08:18:36,832 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 504 transitions. Word has length 118 [2022-04-06 08:18:36,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:18:36,832 INFO L478 AbstractCegarLoop]: Abstraction has 450 states and 504 transitions. [2022-04-06 08:18:36,832 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.923076923076923) internal successors, (154), 26 states have internal predecessors, (154), 24 states have call successors, (26), 14 states have call predecessors, (26), 13 states have return successors, (24), 22 states have call predecessors, (24), 23 states have call successors, (24) [2022-04-06 08:18:36,832 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 504 transitions. [2022-04-06 08:18:36,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-04-06 08:18:36,834 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:18:36,834 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:18:36,855 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-04-06 08:18:37,047 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,SelfDestructingSolverStorable13 [2022-04-06 08:18:37,048 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:18:37,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:18:37,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1797096085, now seen corresponding path program 3 times [2022-04-06 08:18:37,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:18:37,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230636312] [2022-04-06 08:18:37,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:18:37,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:18:37,056 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 08:18:37,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [479166116] [2022-04-06 08:18:37,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 08:18:37,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:18:37,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 08:18:37,058 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 08:18:37,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 08:18:37,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-04-06 08:18:37,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 08:18:37,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-06 08:18:37,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 08:18:46,548 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 56 proven. 433 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-04-06 08:18:46,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 08:18:51,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:18:51,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230636312] [2022-04-06 08:18:51,074 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 08:18:51,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479166116] [2022-04-06 08:18:51,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479166116] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 08:18:51,074 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 08:18:51,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2022-04-06 08:18:51,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058702004] [2022-04-06 08:18:51,075 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-06 08:18:51,075 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-04-06 08:18:51,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:18:51,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-04-06 08:18:51,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=551, Invalid=1703, Unknown=2, NotChecked=0, Total=2256 [2022-04-06 08:18:51,076 INFO L87 Difference]: Start difference. First operand 450 states and 504 transitions. Second operand has 39 states, 39 states have (on average 2.0) internal successors, (78), 37 states have internal predecessors, (78), 14 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 14 states have call predecessors, (14), 13 states have call successors, (14) [2022-04-06 08:19:59,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:19:59,350 INFO L93 Difference]: Finished difference Result 713 states and 835 transitions. [2022-04-06 08:19:59,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-04-06 08:19:59,351 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.0) internal successors, (78), 37 states have internal predecessors, (78), 14 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 14 states have call predecessors, (14), 13 states have call successors, (14) Word has length 138 [2022-04-06 08:19:59,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:19:59,354 INFO L225 Difference]: With dead ends: 713 [2022-04-06 08:19:59,354 INFO L226 Difference]: Without dead ends: 713 [2022-04-06 08:19:59,355 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 144 SyntacticMatches, 10 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 2577 ImplicationChecksByTransitivity, 75.4s TimeCoverageRelationStatistics Valid=1654, Invalid=5480, Unknown=6, NotChecked=0, Total=7140 [2022-04-06 08:19:59,356 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 105 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 08:19:59,356 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 282 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 319 Invalid, 0 Unknown, 91 Unchecked, 1.3s Time] [2022-04-06 08:19:59,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2022-04-06 08:19:59,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 450. [2022-04-06 08:19:59,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 357 states have (on average 1.1512605042016806) internal successors, (411), 358 states have internal predecessors, (411), 47 states have call successors, (47), 46 states have call predecessors, (47), 45 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2022-04-06 08:19:59,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 503 transitions. [2022-04-06 08:19:59,371 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 503 transitions. Word has length 138 [2022-04-06 08:19:59,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:19:59,371 INFO L478 AbstractCegarLoop]: Abstraction has 450 states and 503 transitions. [2022-04-06 08:19:59,371 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.0) internal successors, (78), 37 states have internal predecessors, (78), 14 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 14 states have call predecessors, (14), 13 states have call successors, (14) [2022-04-06 08:19:59,371 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 503 transitions. [2022-04-06 08:19:59,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-04-06 08:19:59,373 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:19:59,373 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:19:59,396 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-04-06 08:19:59,587 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:19:59,587 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:19:59,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:19:59,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1403111723, now seen corresponding path program 4 times [2022-04-06 08:19:59,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:19:59,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271837211] [2022-04-06 08:19:59,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:19:59,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:19:59,595 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 08:19:59,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1555297257] [2022-04-06 08:19:59,596 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 08:19:59,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:19:59,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 08:19:59,597 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 08:19:59,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-06 08:19:59,666 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 08:19:59,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 08:19:59,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 84 conjunts are in the unsatisfiable core [2022-04-06 08:19:59,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 08:21:31,900 WARN L232 SmtUtils]: Spent 15.69s on a formula simplification. DAG size of input: 5168 DAG size of output: 4287 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)