/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/prod4br-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 15:43:44,802 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 15:43:44,805 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 15:43:44,875 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 15:43:44,876 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 15:43:44,876 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 15:43:44,877 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 15:43:44,878 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 15:43:44,879 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 15:43:44,885 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 15:43:44,885 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 15:43:44,886 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 15:43:44,886 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 15:43:44,887 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 15:43:44,887 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 15:43:44,888 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 15:43:44,888 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 15:43:44,888 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 15:43:44,889 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 15:43:44,890 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 15:43:44,891 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 15:43:44,893 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 15:43:44,894 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 15:43:44,894 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 15:43:44,896 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 15:43:44,900 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 15:43:44,901 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 15:43:44,901 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 15:43:44,905 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 15:43:44,911 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 15:43:44,911 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 15:43:44,912 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 15:43:44,912 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 15:43:44,912 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 15:43:44,913 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 15:43:44,913 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 15:43:44,913 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 15:43:44,913 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 15:43:44,913 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 15:43:44,913 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 15:43:44,913 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 15:43:44,913 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 15:43:44,914 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 15:43:44,914 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 15:43:44,914 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 15:43:44,914 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 15:43:44,914 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 15:43:44,914 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 15:43:44,914 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 15:43:44,914 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 15:43:44,915 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 15:43:44,915 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 15:43:45,057 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 15:43:45,081 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 15:43:45,083 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 15:43:45,083 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 15:43:45,085 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 15:43:45,086 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_unwindbound50.c [2022-01-31 15:43:45,131 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/841973b15/ce17b8389dfe4ae48a2381f71316782a/FLAGc064d4357 [2022-01-31 15:43:45,443 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 15:43:45,444 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_unwindbound50.c [2022-01-31 15:43:45,452 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/841973b15/ce17b8389dfe4ae48a2381f71316782a/FLAGc064d4357 [2022-01-31 15:43:45,875 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/841973b15/ce17b8389dfe4ae48a2381f71316782a [2022-01-31 15:43:45,877 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 15:43:45,877 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 15:43:45,883 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 15:43:45,883 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 15:43:45,886 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 15:43:45,886 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 03:43:45" (1/1) ... [2022-01-31 15:43:45,887 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@541f7825 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:43:45, skipping insertion in model container [2022-01-31 15:43:45,887 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 03:43:45" (1/1) ... [2022-01-31 15:43:45,891 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 15:43:45,899 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 15:43:46,002 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/prod4br-ll_unwindbound50.c[524,537] [2022-01-31 15:43:46,042 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 15:43:46,046 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 15:43:46,056 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/prod4br-ll_unwindbound50.c[524,537] [2022-01-31 15:43:46,076 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 15:43:46,084 INFO L208 MainTranslator]: Completed translation [2022-01-31 15:43:46,085 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:43:46 WrapperNode [2022-01-31 15:43:46,085 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 15:43:46,086 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 15:43:46,086 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 15:43:46,086 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 15:43:46,102 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:43:46" (1/1) ... [2022-01-31 15:43:46,103 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:43:46" (1/1) ... [2022-01-31 15:43:46,117 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:43:46" (1/1) ... [2022-01-31 15:43:46,117 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:43:46" (1/1) ... [2022-01-31 15:43:46,124 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:43:46" (1/1) ... [2022-01-31 15:43:46,127 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:43:46" (1/1) ... [2022-01-31 15:43:46,127 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:43:46" (1/1) ... [2022-01-31 15:43:46,128 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 15:43:46,129 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 15:43:46,129 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 15:43:46,129 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 15:43:46,135 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:43:46" (1/1) ... [2022-01-31 15:43:46,139 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 15:43:46,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 15:43:46,161 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 15:43:46,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 15:43:46,193 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 15:43:46,193 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 15:43:46,193 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 15:43:46,193 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 15:43:46,193 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 15:43:46,193 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 15:43:46,194 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 15:43:46,194 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 15:43:46,194 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 15:43:46,194 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 15:43:46,194 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 15:43:46,194 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 15:43:46,194 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 15:43:46,195 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 15:43:46,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 15:43:46,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 15:43:46,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 15:43:46,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 15:43:46,197 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 15:43:46,197 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 15:43:46,244 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 15:43:46,246 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 15:43:46,389 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 15:43:46,393 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 15:43:46,393 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-31 15:43:46,395 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 03:43:46 BoogieIcfgContainer [2022-01-31 15:43:46,395 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 15:43:46,395 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 15:43:46,395 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 15:43:46,412 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 15:43:46,414 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 03:43:46" (1/1) ... [2022-01-31 15:43:46,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 03:43:46 BasicIcfg [2022-01-31 15:43:46,426 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 15:43:46,435 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 15:43:46,435 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 15:43:46,438 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 15:43:46,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 03:43:45" (1/4) ... [2022-01-31 15:43:46,438 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cc1100d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 03:43:46, skipping insertion in model container [2022-01-31 15:43:46,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:43:46" (2/4) ... [2022-01-31 15:43:46,439 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cc1100d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 03:43:46, skipping insertion in model container [2022-01-31 15:43:46,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 03:43:46" (3/4) ... [2022-01-31 15:43:46,439 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cc1100d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 03:43:46, skipping insertion in model container [2022-01-31 15:43:46,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 03:43:46" (4/4) ... [2022-01-31 15:43:46,440 INFO L111 eAbstractionObserver]: Analyzing ICFG prod4br-ll_unwindbound50.cJordan [2022-01-31 15:43:46,443 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 15:43:46,443 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 15:43:46,495 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 15:43:46,504 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-31 15:43:46,504 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 15:43:46,514 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 15:43:46,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-31 15:43:46,528 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 15:43:46,529 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 15:43:46,529 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 15:43:46,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 15:43:46,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1119019339, now seen corresponding path program 1 times [2022-01-31 15:43:46,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 15:43:46,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027695797] [2022-01-31 15:43:46,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:43:46,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 15:43:46,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:43:46,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 15:43:46,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:43:46,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 15:43:46,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:43:46,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 15:43:46,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 15:43:46,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027695797] [2022-01-31 15:43:46,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027695797] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 15:43:46,713 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 15:43:46,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 15:43:46,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589845426] [2022-01-31 15:43:46,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 15:43:46,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 15:43:46,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 15:43:46,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 15:43:46,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 15:43:46,742 INFO L87 Difference]: Start difference. First operand has 32 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) 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), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 15:43:46,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 15:43:46,811 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2022-01-31 15:43:46,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 15:43:46,813 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), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-01-31 15:43:46,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 15:43:46,818 INFO L225 Difference]: With dead ends: 33 [2022-01-31 15:43:46,818 INFO L226 Difference]: Without dead ends: 28 [2022-01-31 15:43:46,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 15:43:46,822 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 15:43:46,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 40 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 15:43:46,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-31 15:43:46,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-01-31 15:43:46,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 15:43:46,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2022-01-31 15:43:46,852 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 17 [2022-01-31 15:43:46,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 15:43:46,852 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2022-01-31 15:43:46,852 INFO L471 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), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 15:43:46,853 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2022-01-31 15:43:46,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-31 15:43:46,853 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 15:43:46,853 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 15:43:46,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 15:43:46,854 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 15:43:46,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 15:43:46,855 INFO L85 PathProgramCache]: Analyzing trace with hash -496973861, now seen corresponding path program 1 times [2022-01-31 15:43:46,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 15:43:46,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894060872] [2022-01-31 15:43:46,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:43:46,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 15:43:46,869 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 15:43:46,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [77944222] [2022-01-31 15:43:46,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:43:46,870 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:43:46,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 15:43:46,872 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 15:43:46,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 15:43:46,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:43:46,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-31 15:43:46,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 15:43:47,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 15:43:47,065 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 15:43:47,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 15:43:47,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894060872] [2022-01-31 15:43:47,067 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 15:43:47,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77944222] [2022-01-31 15:43:47,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77944222] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 15:43:47,070 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 15:43:47,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 15:43:47,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570971665] [2022-01-31 15:43:47,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 15:43:47,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 15:43:47,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 15:43:47,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 15:43:47,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 15:43:47,075 INFO L87 Difference]: Start difference. First operand 27 states and 33 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) [2022-01-31 15:43:47,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 15:43:47,088 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2022-01-31 15:43:47,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 15:43:47,089 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 [2022-01-31 15:43:47,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 15:43:47,090 INFO L225 Difference]: With dead ends: 29 [2022-01-31 15:43:47,091 INFO L226 Difference]: Without dead ends: 29 [2022-01-31 15:43:47,092 INFO L932 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 [2022-01-31 15:43:47,095 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 81 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 [2022-01-31 15:43:47,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 81 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 15:43:47,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-31 15:43:47,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-01-31 15:43:47,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 15:43:47,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2022-01-31 15:43:47,108 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 18 [2022-01-31 15:43:47,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 15:43:47,109 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2022-01-31 15:43:47,109 INFO L471 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) [2022-01-31 15:43:47,109 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2022-01-31 15:43:47,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-31 15:43:47,110 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 15:43:47,110 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 15:43:47,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-31 15:43:47,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:43:47,323 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 15:43:47,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 15:43:47,324 INFO L85 PathProgramCache]: Analyzing trace with hash -495871594, now seen corresponding path program 1 times [2022-01-31 15:43:47,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 15:43:47,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690127934] [2022-01-31 15:43:47,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:43:47,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 15:43:47,341 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 15:43:47,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1170536757] [2022-01-31 15:43:47,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:43:47,342 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:43:47,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 15:43:47,343 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 15:43:47,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 15:43:47,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:43:47,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-31 15:43:47,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 15:43:47,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 15:43:47,454 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 15:43:47,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 15:43:47,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690127934] [2022-01-31 15:43:47,454 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 15:43:47,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170536757] [2022-01-31 15:43:47,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170536757] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 15:43:47,455 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 15:43:47,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 15:43:47,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727008126] [2022-01-31 15:43:47,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 15:43:47,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 15:43:47,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 15:43:47,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 15:43:47,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 15:43:47,456 INFO L87 Difference]: Start difference. First operand 29 states and 35 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) [2022-01-31 15:43:47,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 15:43:47,498 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2022-01-31 15:43:47,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 15:43:47,498 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 [2022-01-31 15:43:47,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 15:43:47,499 INFO L225 Difference]: With dead ends: 40 [2022-01-31 15:43:47,499 INFO L226 Difference]: Without dead ends: 40 [2022-01-31 15:43:47,499 INFO L932 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 [2022-01-31 15:43:47,500 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 9 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 15:43:47,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 90 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 15:43:47,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-31 15:43:47,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2022-01-31 15:43:47,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 24 states have internal predecessors, (28), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 15:43:47,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2022-01-31 15:43:47,505 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 18 [2022-01-31 15:43:47,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 15:43:47,505 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2022-01-31 15:43:47,506 INFO L471 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) [2022-01-31 15:43:47,506 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2022-01-31 15:43:47,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-31 15:43:47,506 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 15:43:47,506 INFO L514 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] [2022-01-31 15:43:47,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 15:43:47,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-01-31 15:43:47,724 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 15:43:47,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 15:43:47,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1025358414, now seen corresponding path program 1 times [2022-01-31 15:43:47,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 15:43:47,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114065346] [2022-01-31 15:43:47,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:43:47,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 15:43:47,733 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 15:43:47,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [484534799] [2022-01-31 15:43:47,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:43:47,733 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:43:47,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 15:43:47,735 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 15:43:47,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 15:43:47,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:43:47,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-31 15:43:47,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 15:43:48,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 15:43:48,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 15:43:48,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 15:43:48,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 15:43:48,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114065346] [2022-01-31 15:43:48,228 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 15:43:48,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484534799] [2022-01-31 15:43:48,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484534799] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 15:43:48,229 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 15:43:48,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 15 [2022-01-31 15:43:48,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273775326] [2022-01-31 15:43:48,229 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 15:43:48,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 15:43:48,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 15:43:48,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 15:43:48,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-01-31 15:43:48,231 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 15:43:48,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 15:43:48,423 INFO L93 Difference]: Finished difference Result 53 states and 70 transitions. [2022-01-31 15:43:48,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 15:43:48,423 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 24 [2022-01-31 15:43:48,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 15:43:48,425 INFO L225 Difference]: With dead ends: 53 [2022-01-31 15:43:48,425 INFO L226 Difference]: Without dead ends: 53 [2022-01-31 15:43:48,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-01-31 15:43:48,426 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 60 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 15:43:48,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 139 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 15:43:48,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-01-31 15:43:48,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 39. [2022-01-31 15:43:48,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.24) internal successors, (31), 28 states have internal predecessors, (31), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 15:43:48,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2022-01-31 15:43:48,431 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 24 [2022-01-31 15:43:48,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 15:43:48,431 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2022-01-31 15:43:48,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 15:43:48,432 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2022-01-31 15:43:48,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 15:43:48,432 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 15:43:48,432 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 15:43:48,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 15:43:48,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:43:48,633 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 15:43:48,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 15:43:48,643 INFO L85 PathProgramCache]: Analyzing trace with hash -2117889998, now seen corresponding path program 1 times [2022-01-31 15:43:48,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 15:43:48,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895773518] [2022-01-31 15:43:48,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:43:48,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 15:43:48,651 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 15:43:48,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1461627499] [2022-01-31 15:43:48,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:43:48,651 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:43:48,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 15:43:48,652 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 15:43:48,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 15:43:48,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:43:48,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 15:43:48,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 15:43:48,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 15:43:48,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 15:43:48,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 15:43:48,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 15:43:48,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895773518] [2022-01-31 15:43:48,815 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 15:43:48,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461627499] [2022-01-31 15:43:48,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461627499] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 15:43:48,815 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 15:43:48,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-01-31 15:43:48,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819939452] [2022-01-31 15:43:48,815 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 15:43:48,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 15:43:48,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 15:43:48,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 15:43:48,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-01-31 15:43:48,816 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 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) [2022-01-31 15:43:48,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 15:43:48,877 INFO L93 Difference]: Finished difference Result 95 states and 112 transitions. [2022-01-31 15:43:48,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 15:43:48,878 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 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 27 [2022-01-31 15:43:48,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 15:43:48,879 INFO L225 Difference]: With dead ends: 95 [2022-01-31 15:43:48,879 INFO L226 Difference]: Without dead ends: 93 [2022-01-31 15:43:48,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-01-31 15:43:48,880 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 64 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 15:43:48,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 180 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 15:43:48,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-01-31 15:43:48,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 87. [2022-01-31 15:43:48,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 60 states have (on average 1.3333333333333333) internal successors, (80), 64 states have internal predecessors, (80), 16 states have call successors, (16), 12 states have call predecessors, (16), 10 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-01-31 15:43:48,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 107 transitions. [2022-01-31 15:43:48,887 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 107 transitions. Word has length 27 [2022-01-31 15:43:48,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 15:43:48,887 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 107 transitions. [2022-01-31 15:43:48,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 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) [2022-01-31 15:43:48,887 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 107 transitions. [2022-01-31 15:43:48,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 15:43:48,888 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 15:43:48,888 INFO L514 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] [2022-01-31 15:43:48,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-31 15:43:49,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:43:49,109 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 15:43:49,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 15:43:49,110 INFO L85 PathProgramCache]: Analyzing trace with hash -2116787731, now seen corresponding path program 1 times [2022-01-31 15:43:49,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 15:43:49,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147843258] [2022-01-31 15:43:49,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:43:49,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 15:43:49,117 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 15:43:49,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [81704441] [2022-01-31 15:43:49,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:43:49,117 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:43:49,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 15:43:49,118 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 15:43:49,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-31 15:43:49,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:43:49,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-31 15:43:49,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 15:43:49,697 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 15:43:49,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 15:43:50,782 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 15:43:50,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 15:43:50,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147843258] [2022-01-31 15:43:50,782 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 15:43:50,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81704441] [2022-01-31 15:43:50,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81704441] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 15:43:50,782 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 15:43:50,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2022-01-31 15:43:50,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821258436] [2022-01-31 15:43:50,783 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 15:43:50,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 15:43:50,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 15:43:50,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 15:43:50,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-01-31 15:43:50,784 INFO L87 Difference]: Start difference. First operand 87 states and 107 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 14 states have internal predecessors, (30), 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) [2022-01-31 15:43:52,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 15:43:52,218 INFO L93 Difference]: Finished difference Result 125 states and 160 transitions. [2022-01-31 15:43:52,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 15:43:52,220 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 14 states have internal predecessors, (30), 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 27 [2022-01-31 15:43:52,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 15:43:52,222 INFO L225 Difference]: With dead ends: 125 [2022-01-31 15:43:52,222 INFO L226 Difference]: Without dead ends: 121 [2022-01-31 15:43:52,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-01-31 15:43:52,226 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 84 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 15:43:52,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 243 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 15:43:52,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-01-31 15:43:52,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 79. [2022-01-31 15:43:52,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 57 states have (on average 1.3157894736842106) internal successors, (75), 59 states have internal predecessors, (75), 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) [2022-01-31 15:43:52,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 96 transitions. [2022-01-31 15:43:52,237 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 96 transitions. Word has length 27 [2022-01-31 15:43:52,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 15:43:52,237 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 96 transitions. [2022-01-31 15:43:52,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 14 states have internal predecessors, (30), 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) [2022-01-31 15:43:52,237 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 96 transitions. [2022-01-31 15:43:52,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-31 15:43:52,238 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 15:43:52,238 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 15:43:52,254 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-01-31 15:43:52,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:43:52,438 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 15:43:52,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 15:43:52,439 INFO L85 PathProgramCache]: Analyzing trace with hash -410392694, now seen corresponding path program 1 times [2022-01-31 15:43:52,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 15:43:52,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4354905] [2022-01-31 15:43:52,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:43:52,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 15:43:52,445 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 15:43:52,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1206117420] [2022-01-31 15:43:52,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:43:52,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:43:52,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 15:43:52,446 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 15:43:52,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-31 15:43:52,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:43:52,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-31 15:43:52,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 15:43:52,546 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 15:43:52,546 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 15:43:52,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 15:43:52,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4354905] [2022-01-31 15:43:52,546 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 15:43:52,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206117420] [2022-01-31 15:43:52,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206117420] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 15:43:52,547 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 15:43:52,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 15:43:52,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365012071] [2022-01-31 15:43:52,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 15:43:52,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 15:43:52,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 15:43:52,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 15:43:52,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-01-31 15:43:52,548 INFO L87 Difference]: Start difference. First operand 79 states and 96 transitions. Second operand has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 15:43:52,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 15:43:52,655 INFO L93 Difference]: Finished difference Result 114 states and 148 transitions. [2022-01-31 15:43:52,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 15:43:52,655 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 29 [2022-01-31 15:43:52,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 15:43:52,656 INFO L225 Difference]: With dead ends: 114 [2022-01-31 15:43:52,656 INFO L226 Difference]: Without dead ends: 104 [2022-01-31 15:43:52,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-01-31 15:43:52,656 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 33 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 15:43:52,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 157 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 15:43:52,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-01-31 15:43:52,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 99. [2022-01-31 15:43:52,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 74 states have (on average 1.3243243243243243) internal successors, (98), 76 states have internal predecessors, (98), 15 states have call successors, (15), 11 states have call predecessors, (15), 9 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-01-31 15:43:52,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 125 transitions. [2022-01-31 15:43:52,663 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 125 transitions. Word has length 29 [2022-01-31 15:43:52,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 15:43:52,663 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 125 transitions. [2022-01-31 15:43:52,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 15:43:52,663 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 125 transitions. [2022-01-31 15:43:52,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 15:43:52,664 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 15:43:52,664 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 15:43:52,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-31 15:43:52,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:43:52,864 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 15:43:52,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 15:43:52,865 INFO L85 PathProgramCache]: Analyzing trace with hash 159893073, now seen corresponding path program 1 times [2022-01-31 15:43:52,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 15:43:52,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143660441] [2022-01-31 15:43:52,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:43:52,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 15:43:52,871 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 15:43:52,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [138192238] [2022-01-31 15:43:52,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:43:52,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:43:52,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 15:43:52,873 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 15:43:52,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-31 15:43:52,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:43:52,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-31 15:43:52,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 15:43:52,973 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 15:43:52,973 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 15:43:52,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 15:43:52,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143660441] [2022-01-31 15:43:52,973 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 15:43:52,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138192238] [2022-01-31 15:43:52,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138192238] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 15:43:52,974 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 15:43:52,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 15:43:52,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299677750] [2022-01-31 15:43:52,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 15:43:52,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 15:43:52,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 15:43:52,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 15:43:52,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 15:43:52,975 INFO L87 Difference]: Start difference. First operand 99 states and 125 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 15:43:53,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 15:43:53,013 INFO L93 Difference]: Finished difference Result 139 states and 177 transitions. [2022-01-31 15:43:53,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 15:43:53,014 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 40 [2022-01-31 15:43:53,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 15:43:53,014 INFO L225 Difference]: With dead ends: 139 [2022-01-31 15:43:53,014 INFO L226 Difference]: Without dead ends: 129 [2022-01-31 15:43:53,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-31 15:43:53,015 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 7 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 15:43:53,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 123 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 15:43:53,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-01-31 15:43:53,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 113. [2022-01-31 15:43:53,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 85 states have (on average 1.2941176470588236) internal successors, (110), 87 states have internal predecessors, (110), 18 states have call successors, (18), 11 states have call predecessors, (18), 9 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-01-31 15:43:53,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 143 transitions. [2022-01-31 15:43:53,021 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 143 transitions. Word has length 40 [2022-01-31 15:43:53,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 15:43:53,021 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 143 transitions. [2022-01-31 15:43:53,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 15:43:53,022 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 143 transitions. [2022-01-31 15:43:53,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 15:43:53,022 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 15:43:53,022 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 15:43:53,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-31 15:43:53,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:43:53,239 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 15:43:53,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 15:43:53,240 INFO L85 PathProgramCache]: Analyzing trace with hash -837179280, now seen corresponding path program 1 times [2022-01-31 15:43:53,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 15:43:53,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079181867] [2022-01-31 15:43:53,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:43:53,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 15:43:53,246 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 15:43:53,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1795136962] [2022-01-31 15:43:53,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:43:53,247 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:43:53,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 15:43:53,248 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 15:43:53,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-31 15:43:53,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:43:53,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 15:43:53,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 15:43:53,376 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-31 15:43:53,394 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 15:43:53,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 15:43:53,463 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 15:43:53,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 15:43:53,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079181867] [2022-01-31 15:43:53,463 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 15:43:53,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795136962] [2022-01-31 15:43:53,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795136962] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-31 15:43:53,463 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 15:43:53,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 11 [2022-01-31 15:43:53,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483663241] [2022-01-31 15:43:53,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 15:43:53,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 15:43:53,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 15:43:53,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 15:43:53,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-01-31 15:43:53,464 INFO L87 Difference]: Start difference. First operand 113 states and 143 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 15:43:53,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 15:43:53,577 INFO L93 Difference]: Finished difference Result 118 states and 146 transitions. [2022-01-31 15:43:53,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 15:43:53,577 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2022-01-31 15:43:53,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 15:43:53,578 INFO L225 Difference]: With dead ends: 118 [2022-01-31 15:43:53,578 INFO L226 Difference]: Without dead ends: 100 [2022-01-31 15:43:53,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-01-31 15:43:53,579 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 5 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 15:43:53,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 126 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 15:43:53,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-01-31 15:43:53,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 66. [2022-01-31 15:43:53,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 49 states have (on average 1.2857142857142858) internal successors, (63), 50 states have internal predecessors, (63), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 15:43:53,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2022-01-31 15:43:53,582 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 40 [2022-01-31 15:43:53,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 15:43:53,583 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2022-01-31 15:43:53,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 15:43:53,583 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2022-01-31 15:43:53,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 15:43:53,583 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 15:43:53,584 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 15:43:53,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-31 15:43:53,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-01-31 15:43:53,799 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 15:43:53,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 15:43:53,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1169624165, now seen corresponding path program 2 times [2022-01-31 15:43:53,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 15:43:53,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133033793] [2022-01-31 15:43:53,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:43:53,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 15:43:53,807 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 15:43:53,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2007597649] [2022-01-31 15:43:53,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 15:43:53,807 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:43:53,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 15:43:53,808 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 15:43:53,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-31 15:43:53,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 15:43:53,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 15:43:53,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-31 15:43:53,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 15:43:53,959 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 15:43:53,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 15:43:54,096 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 15:43:54,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 15:43:54,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133033793] [2022-01-31 15:43:54,097 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 15:43:54,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007597649] [2022-01-31 15:43:54,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007597649] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 15:43:54,097 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 15:43:54,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-01-31 15:43:54,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056400280] [2022-01-31 15:43:54,097 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 15:43:54,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 15:43:54,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 15:43:54,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 15:43:54,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-01-31 15:43:54,100 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 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) [2022-01-31 15:43:54,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 15:43:54,224 INFO L93 Difference]: Finished difference Result 132 states and 163 transitions. [2022-01-31 15:43:54,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 15:43:54,224 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 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 54 [2022-01-31 15:43:54,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 15:43:54,225 INFO L225 Difference]: With dead ends: 132 [2022-01-31 15:43:54,225 INFO L226 Difference]: Without dead ends: 132 [2022-01-31 15:43:54,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-01-31 15:43:54,226 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 168 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 15:43:54,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 256 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 15:43:54,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-01-31 15:43:54,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2022-01-31 15:43:54,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 103 states have (on average 1.3106796116504855) internal successors, (135), 104 states have internal predecessors, (135), 15 states have call successors, (15), 14 states have call predecessors, (15), 13 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-01-31 15:43:54,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 163 transitions. [2022-01-31 15:43:54,230 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 163 transitions. Word has length 54 [2022-01-31 15:43:54,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 15:43:54,230 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 163 transitions. [2022-01-31 15:43:54,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 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) [2022-01-31 15:43:54,230 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 163 transitions. [2022-01-31 15:43:54,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-01-31 15:43:54,232 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 15:43:54,232 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 15:43:54,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-31 15:43:54,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-31 15:43:54,449 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 15:43:54,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 15:43:54,449 INFO L85 PathProgramCache]: Analyzing trace with hash 93180219, now seen corresponding path program 3 times [2022-01-31 15:43:54,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 15:43:54,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224849546] [2022-01-31 15:43:54,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:43:54,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 15:43:54,457 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 15:43:54,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2128121213] [2022-01-31 15:43:54,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 15:43:54,457 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:43:54,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 15:43:54,458 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 15:43:54,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-31 15:43:54,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-01-31 15:43:54,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 15:43:54,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-31 15:43:54,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 15:43:54,840 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 20 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 15:43:54,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 15:43:55,133 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 20 proven. 245 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-01-31 15:43:55,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 15:43:55,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224849546] [2022-01-31 15:43:55,133 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 15:43:55,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128121213] [2022-01-31 15:43:55,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128121213] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 15:43:55,133 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 15:43:55,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-01-31 15:43:55,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234118575] [2022-01-31 15:43:55,134 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 15:43:55,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 15:43:55,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 15:43:55,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 15:43:55,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-01-31 15:43:55,135 INFO L87 Difference]: Start difference. First operand 132 states and 163 transitions. Second operand has 26 states, 26 states have (on average 5.153846153846154) internal successors, (134), 26 states have internal predecessors, (134), 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) [2022-01-31 15:43:55,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 15:43:55,517 INFO L93 Difference]: Finished difference Result 264 states and 331 transitions. [2022-01-31 15:43:55,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 15:43:55,518 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.153846153846154) internal successors, (134), 26 states have internal predecessors, (134), 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 108 [2022-01-31 15:43:55,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 15:43:55,519 INFO L225 Difference]: With dead ends: 264 [2022-01-31 15:43:55,519 INFO L226 Difference]: Without dead ends: 264 [2022-01-31 15:43:55,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=796, Invalid=1366, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 15:43:55,520 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 480 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 15:43:55,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [480 Valid, 396 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 15:43:55,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-01-31 15:43:55,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 264. [2022-01-31 15:43:55,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 211 states have (on average 1.3222748815165877) internal successors, (279), 212 states have internal predecessors, (279), 27 states have call successors, (27), 26 states have call predecessors, (27), 25 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-01-31 15:43:55,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 331 transitions. [2022-01-31 15:43:55,526 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 331 transitions. Word has length 108 [2022-01-31 15:43:55,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 15:43:55,527 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 331 transitions. [2022-01-31 15:43:55,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.153846153846154) internal successors, (134), 26 states have internal predecessors, (134), 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) [2022-01-31 15:43:55,527 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 331 transitions. [2022-01-31 15:43:55,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2022-01-31 15:43:55,529 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 15:43:55,529 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 15:43:55,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-31 15:43:55,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-31 15:43:55,739 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 15:43:55,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 15:43:55,740 INFO L85 PathProgramCache]: Analyzing trace with hash -477485957, now seen corresponding path program 4 times [2022-01-31 15:43:55,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 15:43:55,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519544550] [2022-01-31 15:43:55,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:43:55,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 15:43:55,752 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 15:43:55,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [240597659] [2022-01-31 15:43:55,752 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 15:43:55,752 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:43:55,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 15:43:55,753 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 15:43:55,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-31 15:43:55,936 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 15:43:55,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 15:43:55,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 658 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-31 15:43:55,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 15:43:56,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2167 backedges. 44 proven. 2123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 15:43:56,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 15:43:57,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2167 backedges. 44 proven. 1199 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2022-01-31 15:43:57,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 15:43:57,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519544550] [2022-01-31 15:43:57,258 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 15:43:57,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240597659] [2022-01-31 15:43:57,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240597659] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 15:43:57,258 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 15:43:57,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-01-31 15:43:57,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606193978] [2022-01-31 15:43:57,258 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 15:43:57,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 15:43:57,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 15:43:57,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 15:43:57,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 15:43:57,261 INFO L87 Difference]: Start difference. First operand 264 states and 331 transitions. Second operand has 50 states, 50 states have (on average 5.32) internal successors, (266), 50 states have internal predecessors, (266), 48 states have call successors, (50), 26 states have call predecessors, (50), 25 states have return successors, (48), 46 states have call predecessors, (48), 47 states have call successors, (48) [2022-01-31 15:43:58,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 15:43:58,392 INFO L93 Difference]: Finished difference Result 528 states and 667 transitions. [2022-01-31 15:43:58,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-01-31 15:43:58,393 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 5.32) internal successors, (266), 50 states have internal predecessors, (266), 48 states have call successors, (50), 26 states have call predecessors, (50), 25 states have return successors, (48), 46 states have call predecessors, (48), 47 states have call successors, (48) Word has length 216 [2022-01-31 15:43:58,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 15:43:58,395 INFO L225 Difference]: With dead ends: 528 [2022-01-31 15:43:58,395 INFO L226 Difference]: Without dead ends: 528 [2022-01-31 15:43:58,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 383 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1288 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3316, Invalid=5614, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 15:43:58,397 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 1134 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1134 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 15:43:58,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1134 Valid, 642 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 15:43:58,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2022-01-31 15:43:58,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 528. [2022-01-31 15:43:58,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 427 states have (on average 1.3278688524590163) internal successors, (567), 428 states have internal predecessors, (567), 51 states have call successors, (51), 50 states have call predecessors, (51), 49 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2022-01-31 15:43:58,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 667 transitions. [2022-01-31 15:43:58,406 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 667 transitions. Word has length 216 [2022-01-31 15:43:58,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 15:43:58,406 INFO L470 AbstractCegarLoop]: Abstraction has 528 states and 667 transitions. [2022-01-31 15:43:58,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 5.32) internal successors, (266), 50 states have internal predecessors, (266), 48 states have call successors, (50), 26 states have call predecessors, (50), 25 states have return successors, (48), 46 states have call predecessors, (48), 47 states have call successors, (48) [2022-01-31 15:43:58,407 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 667 transitions. [2022-01-31 15:43:58,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2022-01-31 15:43:58,410 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 15:43:58,410 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 15:43:58,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-31 15:43:58,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-31 15:43:58,628 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 15:43:58,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 15:43:58,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1977953019, now seen corresponding path program 5 times [2022-01-31 15:43:58,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 15:43:58,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041848808] [2022-01-31 15:43:58,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:43:58,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 15:43:58,644 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 15:43:58,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [381853538] [2022-01-31 15:43:58,644 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 15:43:58,644 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:43:58,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 15:43:58,645 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 15:43:58,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process