/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 15:05:46,149 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 15:05:46,151 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 15:05:46,206 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 15:05:46,206 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 15:05:46,207 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 15:05:46,208 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 15:05:46,209 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 15:05:46,210 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 15:05:46,210 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 15:05:46,211 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 15:05:46,213 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 15:05:46,213 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 15:05:46,216 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 15:05:46,216 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 15:05:46,217 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 15:05:46,217 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 15:05:46,218 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 15:05:46,219 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 15:05:46,220 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 15:05:46,220 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 15:05:46,223 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 15:05:46,225 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 15:05:46,226 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 15:05:46,236 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 15:05:46,241 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 15:05:46,241 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 15:05:46,242 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 15:05:46,242 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 15:05:46,252 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 15:05:46,252 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 15:05:46,253 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 15:05:46,253 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 15:05:46,254 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 15:05:46,254 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 15:05:46,254 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 15:05:46,254 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 15:05:46,254 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 15:05:46,254 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 15:05:46,254 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 15:05:46,255 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 15:05:46,255 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 15:05:46,255 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 15:05:46,255 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 15:05:46,255 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 15:05:46,255 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 15:05:46,255 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 15:05:46,255 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 15:05:46,255 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 15:05:46,256 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 15:05:46,256 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 15:05:46,256 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 15:05:46,432 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 15:05:46,446 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 15:05:46,448 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 15:05:46,448 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 15:05:46,449 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 15:05:46,450 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound20.c [2022-01-31 15:05:46,502 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14c2d500a/4c73b87bbbd542d7abe7a61f329f6705/FLAG001bc5cdc [2022-01-31 15:05:46,839 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 15:05:46,839 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound20.c [2022-01-31 15:05:46,845 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14c2d500a/4c73b87bbbd542d7abe7a61f329f6705/FLAG001bc5cdc [2022-01-31 15:05:46,853 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14c2d500a/4c73b87bbbd542d7abe7a61f329f6705 [2022-01-31 15:05:46,855 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 15:05:46,855 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 15:05:46,856 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 15:05:46,856 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 15:05:46,867 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 15:05:46,868 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 03:05:46" (1/1) ... [2022-01-31 15:05:46,868 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e8974b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:05:46, skipping insertion in model container [2022-01-31 15:05:46,868 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 03:05:46" (1/1) ... [2022-01-31 15:05:46,872 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 15:05:46,882 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 15:05:46,993 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound20.c[526,539] [2022-01-31 15:05:47,004 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 15:05:47,009 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 15:05:47,036 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound20.c[526,539] [2022-01-31 15:05:47,044 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 15:05:47,052 INFO L208 MainTranslator]: Completed translation [2022-01-31 15:05:47,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:05:47 WrapperNode [2022-01-31 15:05:47,053 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 15:05:47,053 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 15:05:47,053 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 15:05:47,054 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 15:05:47,063 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:05:47" (1/1) ... [2022-01-31 15:05:47,063 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:05:47" (1/1) ... [2022-01-31 15:05:47,067 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:05:47" (1/1) ... [2022-01-31 15:05:47,067 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:05:47" (1/1) ... [2022-01-31 15:05:47,069 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:05:47" (1/1) ... [2022-01-31 15:05:47,072 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:05:47" (1/1) ... [2022-01-31 15:05:47,072 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:05:47" (1/1) ... [2022-01-31 15:05:47,073 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 15:05:47,074 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 15:05:47,074 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 15:05:47,074 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 15:05:47,075 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:05:47" (1/1) ... [2022-01-31 15:05:47,096 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 15:05:47,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 15:05:47,127 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 15:05:47,160 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 15:05:47,175 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 15:05:47,175 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 15:05:47,175 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 15:05:47,175 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 15:05:47,175 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 15:05:47,176 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 15:05:47,176 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 15:05:47,176 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 15:05:47,176 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 15:05:47,176 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 15:05:47,176 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 15:05:47,177 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 15:05:47,177 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 15:05:47,177 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 15:05:47,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 15:05:47,178 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 15:05:47,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 15:05:47,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 15:05:47,179 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 15:05:47,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 15:05:47,223 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 15:05:47,224 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 15:05:47,361 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 15:05:47,366 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 15:05:47,366 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 15:05:47,367 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 03:05:47 BoogieIcfgContainer [2022-01-31 15:05:47,367 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 15:05:47,368 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 15:05:47,368 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 15:05:47,369 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 15:05:47,371 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 03:05:47" (1/1) ... [2022-01-31 15:05:47,382 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 03:05:47 BasicIcfg [2022-01-31 15:05:47,382 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 15:05:47,384 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 15:05:47,384 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 15:05:47,385 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 15:05:47,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 03:05:46" (1/4) ... [2022-01-31 15:05:47,386 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1229d167 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 03:05:47, skipping insertion in model container [2022-01-31 15:05:47,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:05:47" (2/4) ... [2022-01-31 15:05:47,386 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1229d167 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 03:05:47, skipping insertion in model container [2022-01-31 15:05:47,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 03:05:47" (3/4) ... [2022-01-31 15:05:47,387 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1229d167 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 03:05:47, skipping insertion in model container [2022-01-31 15:05:47,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 03:05:47" (4/4) ... [2022-01-31 15:05:47,387 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2_unwindbound20.cJordan [2022-01-31 15:05:47,392 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 15:05:47,392 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 15:05:47,422 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 15:05:47,426 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 15:05:47,426 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 15:05:47,435 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 15:05:47,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-31 15:05:47,440 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 15:05:47,440 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 15:05:47,441 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 15:05:47,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 15:05:47,444 INFO L85 PathProgramCache]: Analyzing trace with hash 121155216, now seen corresponding path program 1 times [2022-01-31 15:05:47,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 15:05:47,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796843083] [2022-01-31 15:05:47,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:05:47,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 15:05:47,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:05:47,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 15:05:47,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:05:47,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 15:05:47,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 15:05:47,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796843083] [2022-01-31 15:05:47,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796843083] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 15:05:47,578 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 15:05:47,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 15:05:47,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221776028] [2022-01-31 15:05:47,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 15:05:47,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 15:05:47,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 15:05:47,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 15:05:47,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 15:05:47,603 INFO L87 Difference]: Start difference. First operand has 31 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 15:05:47,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 15:05:47,672 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2022-01-31 15:05:47,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 15:05:47,674 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-01-31 15:05:47,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 15:05:47,682 INFO L225 Difference]: With dead ends: 32 [2022-01-31 15:05:47,682 INFO L226 Difference]: Without dead ends: 27 [2022-01-31 15:05:47,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 15:05:47,690 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 15:05:47,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 44 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 15:05:47,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-31 15:05:47,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-01-31 15:05:47,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 9 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 15:05:47,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2022-01-31 15:05:47,715 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 12 [2022-01-31 15:05:47,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 15:05:47,715 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2022-01-31 15:05:47,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 15:05:47,716 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2022-01-31 15:05:47,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-31 15:05:47,716 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 15:05:47,716 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 15:05:47,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 15:05:47,717 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 15:05:47,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 15:05:47,717 INFO L85 PathProgramCache]: Analyzing trace with hash 152644303, now seen corresponding path program 1 times [2022-01-31 15:05:47,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 15:05:47,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980139167] [2022-01-31 15:05:47,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:05:47,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 15:05:47,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:05:47,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 15:05:47,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:05:47,795 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 15:05:47,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 15:05:47,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980139167] [2022-01-31 15:05:47,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980139167] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 15:05:47,796 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 15:05:47,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 15:05:47,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727349489] [2022-01-31 15:05:47,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 15:05:47,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 15:05:47,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 15:05:47,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 15:05:47,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-31 15:05:47,798 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 15:05:47,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 15:05:47,942 INFO L93 Difference]: Finished difference Result 39 states and 54 transitions. [2022-01-31 15:05:47,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 15:05:47,943 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-01-31 15:05:47,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 15:05:47,945 INFO L225 Difference]: With dead ends: 39 [2022-01-31 15:05:47,945 INFO L226 Difference]: Without dead ends: 39 [2022-01-31 15:05:47,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-01-31 15:05:47,952 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 24 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 15:05:47,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 91 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 15:05:47,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-01-31 15:05:47,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2022-01-31 15:05:47,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 15:05:47,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2022-01-31 15:05:47,965 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 12 [2022-01-31 15:05:47,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 15:05:47,965 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2022-01-31 15:05:47,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 15:05:47,965 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2022-01-31 15:05:47,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-31 15:05:47,966 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 15:05:47,966 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 15:05:47,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 15:05:47,966 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 15:05:47,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 15:05:47,967 INFO L85 PathProgramCache]: Analyzing trace with hash -400958603, now seen corresponding path program 1 times [2022-01-31 15:05:47,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 15:05:47,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771860834] [2022-01-31 15:05:47,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:05:47,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 15:05:47,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:05:48,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 15:05:48,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:05:48,021 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 15:05:48,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 15:05:48,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771860834] [2022-01-31 15:05:48,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771860834] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 15:05:48,022 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 15:05:48,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 15:05:48,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086048147] [2022-01-31 15:05:48,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 15:05:48,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 15:05:48,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 15:05:48,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 15:05:48,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 15:05:48,024 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 15:05:48,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 15:05:48,080 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2022-01-31 15:05:48,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 15:05:48,081 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-01-31 15:05:48,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 15:05:48,082 INFO L225 Difference]: With dead ends: 32 [2022-01-31 15:05:48,082 INFO L226 Difference]: Without dead ends: 32 [2022-01-31 15:05:48,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-31 15:05:48,088 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 6 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 15:05:48,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 73 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 15:05:48,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-31 15:05:48,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-01-31 15:05:48,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 15:05:48,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-01-31 15:05:48,097 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 14 [2022-01-31 15:05:48,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 15:05:48,097 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-01-31 15:05:48,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 15:05:48,098 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-01-31 15:05:48,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-31 15:05:48,098 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 15:05:48,098 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 15:05:48,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 15:05:48,098 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 15:05:48,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 15:05:48,099 INFO L85 PathProgramCache]: Analyzing trace with hash 185978583, now seen corresponding path program 1 times [2022-01-31 15:05:48,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 15:05:48,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816472985] [2022-01-31 15:05:48,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:05:48,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 15:05:48,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:05:48,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 15:05:48,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:05:48,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 15:05:48,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:05:48,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 15:05:48,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 15:05:48,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816472985] [2022-01-31 15:05:48,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816472985] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 15:05:48,172 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 15:05:48,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 15:05:48,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274643688] [2022-01-31 15:05:48,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 15:05:48,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 15:05:48,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 15:05:48,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 15:05:48,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-31 15:05:48,173 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 15:05:48,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 15:05:48,275 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2022-01-31 15:05:48,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 15:05:48,276 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-01-31 15:05:48,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 15:05:48,279 INFO L225 Difference]: With dead ends: 44 [2022-01-31 15:05:48,279 INFO L226 Difference]: Without dead ends: 44 [2022-01-31 15:05:48,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-01-31 15:05:48,279 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 19 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 15:05:48,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 84 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 15:05:48,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-01-31 15:05:48,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2022-01-31 15:05:48,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 23 states have internal predecessors, (28), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 15:05:48,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2022-01-31 15:05:48,285 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 17 [2022-01-31 15:05:48,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 15:05:48,286 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2022-01-31 15:05:48,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 15:05:48,286 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2022-01-31 15:05:48,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 15:05:48,286 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 15:05:48,286 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 15:05:48,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 15:05:48,287 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 15:05:48,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 15:05:48,287 INFO L85 PathProgramCache]: Analyzing trace with hash -820589269, now seen corresponding path program 1 times [2022-01-31 15:05:48,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 15:05:48,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109368687] [2022-01-31 15:05:48,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:05:48,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 15:05:48,296 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 15:05:48,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1207265959] [2022-01-31 15:05:48,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:05:48,296 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:05:48,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 15:05:48,298 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 15:05:48,298 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 15:05:48,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:05:48,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-31 15:05:48,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 15:05:48,470 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 15:05:48,470 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 15:05:48,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 15:05:48,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109368687] [2022-01-31 15:05:48,471 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 15:05:48,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207265959] [2022-01-31 15:05:48,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207265959] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 15:05:48,471 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 15:05:48,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 15:05:48,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292300240] [2022-01-31 15:05:48,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 15:05:48,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 15:05:48,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 15:05:48,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 15:05:48,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 15:05:48,472 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 15:05:48,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 15:05:48,533 INFO L93 Difference]: Finished difference Result 51 states and 66 transitions. [2022-01-31 15:05:48,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 15:05:48,534 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-01-31 15:05:48,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 15:05:48,534 INFO L225 Difference]: With dead ends: 51 [2022-01-31 15:05:48,535 INFO L226 Difference]: Without dead ends: 50 [2022-01-31 15:05:48,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-31 15:05:48,535 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 10 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 15:05:48,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 131 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 15:05:48,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-01-31 15:05:48,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-01-31 15:05:48,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 31 states have internal predecessors, (37), 15 states have call successors, (15), 6 states have call predecessors, (15), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-01-31 15:05:48,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2022-01-31 15:05:48,542 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 22 [2022-01-31 15:05:48,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 15:05:48,542 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2022-01-31 15:05:48,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 15:05:48,543 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2022-01-31 15:05:48,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 15:05:48,543 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 15:05:48,544 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 15:05:48,563 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 15:05:48,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:05:48,774 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 15:05:48,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 15:05:48,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1259710898, now seen corresponding path program 1 times [2022-01-31 15:05:48,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 15:05:48,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694440524] [2022-01-31 15:05:48,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:05:48,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 15:05:48,789 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 15:05:48,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [410447775] [2022-01-31 15:05:48,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:05:48,789 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:05:48,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 15:05:48,796 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 15:05:48,797 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 15:05:48,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:05:48,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 15:05:48,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 15:05:48,947 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 15:05:48,947 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 15:05:48,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 15:05:48,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694440524] [2022-01-31 15:05:48,947 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 15:05:48,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410447775] [2022-01-31 15:05:48,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410447775] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 15:05:48,948 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 15:05:48,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 15:05:48,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954350965] [2022-01-31 15:05:48,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 15:05:48,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 15:05:48,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 15:05:48,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 15:05:48,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 15:05:48,949 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 15:05:48,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 15:05:48,971 INFO L93 Difference]: Finished difference Result 63 states and 73 transitions. [2022-01-31 15:05:48,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 15:05:48,971 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2022-01-31 15:05:48,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 15:05:48,974 INFO L225 Difference]: With dead ends: 63 [2022-01-31 15:05:48,974 INFO L226 Difference]: Without dead ends: 63 [2022-01-31 15:05:48,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 15:05:48,977 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 3 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 15:05:48,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 124 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 15:05:48,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-01-31 15:05:48,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2022-01-31 15:05:48,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 40 states have internal predecessors, (45), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-01-31 15:05:48,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2022-01-31 15:05:48,981 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 30 [2022-01-31 15:05:48,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 15:05:48,982 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2022-01-31 15:05:48,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 15:05:48,982 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2022-01-31 15:05:48,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 15:05:48,982 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 15:05:48,983 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 15:05:48,999 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 15:05:49,197 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,SelfDestructingSolverStorable5 [2022-01-31 15:05:49,197 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 15:05:49,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 15:05:49,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1260813165, now seen corresponding path program 1 times [2022-01-31 15:05:49,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 15:05:49,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447893214] [2022-01-31 15:05:49,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:05:49,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 15:05:49,205 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 15:05:49,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1751365704] [2022-01-31 15:05:49,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:05:49,205 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:05:49,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 15:05:49,207 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 15:05:49,207 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 15:05:49,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:05:49,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 15:05:49,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 15:05:49,350 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 15:05:49,350 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 15:05:49,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 15:05:49,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447893214] [2022-01-31 15:05:49,351 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 15:05:49,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751365704] [2022-01-31 15:05:49,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751365704] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 15:05:49,351 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 15:05:49,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 15:05:49,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322962195] [2022-01-31 15:05:49,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 15:05:49,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 15:05:49,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 15:05:49,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 15:05:49,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 15:05:49,352 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 15:05:49,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 15:05:49,381 INFO L93 Difference]: Finished difference Result 74 states and 89 transitions. [2022-01-31 15:05:49,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 15:05:49,381 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2022-01-31 15:05:49,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 15:05:49,382 INFO L225 Difference]: With dead ends: 74 [2022-01-31 15:05:49,382 INFO L226 Difference]: Without dead ends: 64 [2022-01-31 15:05:49,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-31 15:05:49,383 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 11 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 15:05:49,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 103 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 15:05:49,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-01-31 15:05:49,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-01-31 15:05:49,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 39 states have (on average 1.2307692307692308) internal successors, (48), 41 states have internal predecessors, (48), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-01-31 15:05:49,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2022-01-31 15:05:49,387 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 30 [2022-01-31 15:05:49,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 15:05:49,387 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2022-01-31 15:05:49,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 15:05:49,387 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2022-01-31 15:05:49,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-31 15:05:49,388 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 15:05:49,388 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 15:05:49,407 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 15:05:49,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:05:49,604 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 15:05:49,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 15:05:49,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1811137592, now seen corresponding path program 1 times [2022-01-31 15:05:49,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 15:05:49,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109079344] [2022-01-31 15:05:49,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:05:49,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 15:05:49,611 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 15:05:49,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1969438375] [2022-01-31 15:05:49,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:05:49,611 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:05:49,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 15:05:49,612 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 15:05:49,613 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 15:05:49,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:05:49,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 15:05:49,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 15:05:49,720 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-31 15:05:49,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 15:05:49,801 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 15:05:49,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 15:05:49,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109079344] [2022-01-31 15:05:49,801 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 15:05:49,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969438375] [2022-01-31 15:05:49,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969438375] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 15:05:49,801 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 15:05:49,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-01-31 15:05:49,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439981932] [2022-01-31 15:05:49,802 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 15:05:49,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 15:05:49,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 15:05:49,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 15:05:49,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-01-31 15:05:49,804 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 6 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-01-31 15:05:49,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 15:05:49,872 INFO L93 Difference]: Finished difference Result 119 states and 139 transitions. [2022-01-31 15:05:49,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 15:05:49,873 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 6 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 37 [2022-01-31 15:05:49,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 15:05:49,874 INFO L225 Difference]: With dead ends: 119 [2022-01-31 15:05:49,874 INFO L226 Difference]: Without dead ends: 119 [2022-01-31 15:05:49,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-01-31 15:05:49,875 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 41 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 15:05:49,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 152 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 15:05:49,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-01-31 15:05:49,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 112. [2022-01-31 15:05:49,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 71 states have (on average 1.2112676056338028) internal successors, (86), 74 states have internal predecessors, (86), 25 states have call successors, (25), 16 states have call predecessors, (25), 15 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2022-01-31 15:05:49,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 133 transitions. [2022-01-31 15:05:49,882 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 133 transitions. Word has length 37 [2022-01-31 15:05:49,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 15:05:49,882 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 133 transitions. [2022-01-31 15:05:49,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 6 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-01-31 15:05:49,882 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 133 transitions. [2022-01-31 15:05:49,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 15:05:49,882 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 15:05:49,883 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 15:05:49,901 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 15:05:50,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:05:50,102 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 15:05:50,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 15:05:50,102 INFO L85 PathProgramCache]: Analyzing trace with hash -599722260, now seen corresponding path program 1 times [2022-01-31 15:05:50,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 15:05:50,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521568563] [2022-01-31 15:05:50,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:05:50,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 15:05:50,110 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 15:05:50,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1752536770] [2022-01-31 15:05:50,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:05:50,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:05:50,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 15:05:50,120 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 15:05:50,121 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 15:05:50,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:05:50,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-31 15:05:50,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 15:05:50,283 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-31 15:05:50,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 15:05:50,362 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-01-31 15:05:50,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 15:05:50,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521568563] [2022-01-31 15:05:50,362 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 15:05:50,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752536770] [2022-01-31 15:05:50,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752536770] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-31 15:05:50,362 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 15:05:50,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-01-31 15:05:50,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363749632] [2022-01-31 15:05:50,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 15:05:50,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 15:05:50,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 15:05:50,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 15:05:50,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-31 15:05:50,363 INFO L87 Difference]: Start difference. First operand 112 states and 133 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 15:05:50,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 15:05:50,396 INFO L93 Difference]: Finished difference Result 127 states and 150 transitions. [2022-01-31 15:05:50,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 15:05:50,396 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2022-01-31 15:05:50,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 15:05:50,397 INFO L225 Difference]: With dead ends: 127 [2022-01-31 15:05:50,397 INFO L226 Difference]: Without dead ends: 125 [2022-01-31 15:05:50,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-01-31 15:05:50,398 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 11 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 15:05:50,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 113 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 15:05:50,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-01-31 15:05:50,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 122. [2022-01-31 15:05:50,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 81 states have internal predecessors, (92), 27 states have call successors, (27), 18 states have call predecessors, (27), 16 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-01-31 15:05:50,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 143 transitions. [2022-01-31 15:05:50,404 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 143 transitions. Word has length 40 [2022-01-31 15:05:50,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 15:05:50,404 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 143 transitions. [2022-01-31 15:05:50,405 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, (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 15:05:50,405 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 143 transitions. [2022-01-31 15:05:50,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-31 15:05:50,416 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 15:05:50,417 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 15:05:50,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-31 15:05:50,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:05:50,631 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 15:05:50,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 15:05:50,632 INFO L85 PathProgramCache]: Analyzing trace with hash 560903707, now seen corresponding path program 1 times [2022-01-31 15:05:50,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 15:05:50,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77181916] [2022-01-31 15:05:50,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:05:50,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 15:05:50,638 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 15:05:50,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [313501488] [2022-01-31 15:05:50,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:05:50,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:05:50,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 15:05:50,639 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 15:05:50,640 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 15:05:50,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:05:50,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-31 15:05:50,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 15:05:50,754 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 42 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-31 15:05:50,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 15:05:50,841 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-01-31 15:05:50,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 15:05:50,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77181916] [2022-01-31 15:05:50,841 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 15:05:50,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313501488] [2022-01-31 15:05:50,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313501488] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 15:05:50,842 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 15:05:50,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-01-31 15:05:50,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864342625] [2022-01-31 15:05:50,842 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 15:05:50,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 15:05:50,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 15:05:50,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 15:05:50,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-01-31 15:05:50,846 INFO L87 Difference]: Start difference. First operand 122 states and 143 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 8 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2022-01-31 15:05:50,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 15:05:50,939 INFO L93 Difference]: Finished difference Result 224 states and 267 transitions. [2022-01-31 15:05:50,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 15:05:50,939 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 8 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) Word has length 53 [2022-01-31 15:05:50,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 15:05:50,941 INFO L225 Difference]: With dead ends: 224 [2022-01-31 15:05:50,941 INFO L226 Difference]: Without dead ends: 224 [2022-01-31 15:05:50,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-01-31 15:05:50,942 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 82 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 15:05:50,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 233 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 15:05:50,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-01-31 15:05:50,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 217. [2022-01-31 15:05:50,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 139 states have (on average 1.1942446043165467) internal successors, (166), 148 states have internal predecessors, (166), 51 states have call successors, (51), 28 states have call predecessors, (51), 26 states have return successors, (46), 40 states have call predecessors, (46), 46 states have call successors, (46) [2022-01-31 15:05:50,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 263 transitions. [2022-01-31 15:05:50,953 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 263 transitions. Word has length 53 [2022-01-31 15:05:50,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 15:05:50,953 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 263 transitions. [2022-01-31 15:05:50,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 8 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2022-01-31 15:05:50,954 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 263 transitions. [2022-01-31 15:05:50,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 15:05:50,955 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 15:05:50,955 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 15:05:50,985 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 15:05:51,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:05:51,168 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 15:05:51,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 15:05:51,168 INFO L85 PathProgramCache]: Analyzing trace with hash -453219492, now seen corresponding path program 1 times [2022-01-31 15:05:51,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 15:05:51,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641766768] [2022-01-31 15:05:51,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:05:51,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 15:05:51,176 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 15:05:51,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [336354785] [2022-01-31 15:05:51,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:05:51,176 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:05:51,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 15:05:51,182 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 15:05:51,187 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 15:05:51,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:05:51,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-31 15:05:51,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 15:05:51,515 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-01-31 15:05:51,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 15:05:52,279 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-01-31 15:05:52,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 15:05:52,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641766768] [2022-01-31 15:05:52,281 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 15:05:52,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336354785] [2022-01-31 15:05:52,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336354785] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 15:05:52,282 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 15:05:52,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-01-31 15:05:52,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789547739] [2022-01-31 15:05:52,291 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 15:05:52,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 15:05:52,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 15:05:52,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 15:05:52,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-01-31 15:05:52,293 INFO L87 Difference]: Start difference. First operand 217 states and 263 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 7 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2022-01-31 15:05:56,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 15:05:56,596 INFO L93 Difference]: Finished difference Result 310 states and 393 transitions. [2022-01-31 15:05:56,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 15:05:56,596 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 7 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) Word has length 62 [2022-01-31 15:05:56,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 15:05:56,598 INFO L225 Difference]: With dead ends: 310 [2022-01-31 15:05:56,598 INFO L226 Difference]: Without dead ends: 303 [2022-01-31 15:05:56,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 112 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-01-31 15:05:56,599 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 52 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 15:05:56,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 294 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 15:05:56,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-01-31 15:05:56,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 274. [2022-01-31 15:05:56,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 185 states have (on average 1.2324324324324325) internal successors, (228), 191 states have internal predecessors, (228), 58 states have call successors, (58), 31 states have call predecessors, (58), 30 states have return successors, (55), 51 states have call predecessors, (55), 55 states have call successors, (55) [2022-01-31 15:05:56,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 341 transitions. [2022-01-31 15:05:56,610 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 341 transitions. Word has length 62 [2022-01-31 15:05:56,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 15:05:56,610 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 341 transitions. [2022-01-31 15:05:56,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 7 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2022-01-31 15:05:56,611 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 341 transitions. [2022-01-31 15:05:56,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-31 15:05:56,611 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 15:05:56,611 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 15:05:56,633 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-01-31 15:05:56,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:05:56,824 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 15:05:56,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 15:05:56,824 INFO L85 PathProgramCache]: Analyzing trace with hash 929445032, now seen corresponding path program 1 times [2022-01-31 15:05:56,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 15:05:56,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657471883] [2022-01-31 15:05:56,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:05:56,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 15:05:56,830 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 15:05:56,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [128228048] [2022-01-31 15:05:56,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:05:56,830 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:05:56,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 15:05:56,831 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 15:05:56,832 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 15:05:56,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:05:56,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-31 15:05:56,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 15:05:57,241 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 66 proven. 13 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-01-31 15:05:57,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 15:05:57,459 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2022-01-31 15:05:57,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 15:05:57,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657471883] [2022-01-31 15:05:57,459 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 15:05:57,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128228048] [2022-01-31 15:05:57,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128228048] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 15:05:57,460 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 15:05:57,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2022-01-31 15:05:57,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857663665] [2022-01-31 15:05:57,460 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 15:05:57,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 15:05:57,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 15:05:57,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 15:05:57,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-01-31 15:05:57,461 INFO L87 Difference]: Start difference. First operand 274 states and 341 transitions. Second operand has 16 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2022-01-31 15:05:57,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 15:05:57,764 INFO L93 Difference]: Finished difference Result 266 states and 313 transitions. [2022-01-31 15:05:57,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 15:05:57,764 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) Word has length 73 [2022-01-31 15:05:57,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 15:05:57,766 INFO L225 Difference]: With dead ends: 266 [2022-01-31 15:05:57,766 INFO L226 Difference]: Without dead ends: 239 [2022-01-31 15:05:57,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 129 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2022-01-31 15:05:57,766 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 66 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 15:05:57,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 243 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 15:05:57,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-01-31 15:05:57,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 223. [2022-01-31 15:05:57,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 150 states have (on average 1.1933333333333334) internal successors, (179), 154 states have internal predecessors, (179), 45 states have call successors, (45), 29 states have call predecessors, (45), 27 states have return successors, (42), 39 states have call predecessors, (42), 42 states have call successors, (42) [2022-01-31 15:05:57,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 266 transitions. [2022-01-31 15:05:57,773 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 266 transitions. Word has length 73 [2022-01-31 15:05:57,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 15:05:57,773 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 266 transitions. [2022-01-31 15:05:57,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2022-01-31 15:05:57,773 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 266 transitions. [2022-01-31 15:05:57,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-31 15:05:57,774 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 15:05:57,774 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 15:05:57,791 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 15:05:57,991 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,SelfDestructingSolverStorable11 [2022-01-31 15:05:57,991 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 15:05:57,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 15:05:57,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1139963303, now seen corresponding path program 1 times [2022-01-31 15:05:57,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 15:05:57,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78550807] [2022-01-31 15:05:57,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:05:57,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 15:05:58,001 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 15:05:58,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1168061983] [2022-01-31 15:05:58,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:05:58,001 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:05:58,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 15:05:58,003 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 15:05:58,004 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 15:05:58,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:05:58,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 15:05:58,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 15:05:58,231 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-01-31 15:05:58,231 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 15:05:58,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 15:05:58,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78550807] [2022-01-31 15:05:58,231 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 15:05:58,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168061983] [2022-01-31 15:05:58,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168061983] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 15:05:58,231 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 15:05:58,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 15:05:58,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614984670] [2022-01-31 15:05:58,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 15:05:58,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 15:05:58,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 15:05:58,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 15:05:58,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-31 15:05:58,232 INFO L87 Difference]: Start difference. First operand 223 states and 266 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-01-31 15:05:58,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 15:05:58,270 INFO L93 Difference]: Finished difference Result 222 states and 263 transitions. [2022-01-31 15:05:58,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 15:05:58,271 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 82 [2022-01-31 15:05:58,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 15:05:58,272 INFO L225 Difference]: With dead ends: 222 [2022-01-31 15:05:58,272 INFO L226 Difference]: Without dead ends: 222 [2022-01-31 15:05:58,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-31 15:05:58,273 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 25 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 15:05:58,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 96 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 15:05:58,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-01-31 15:05:58,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 217. [2022-01-31 15:05:58,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 147 states have (on average 1.163265306122449) internal successors, (171), 149 states have internal predecessors, (171), 43 states have call successors, (43), 27 states have call predecessors, (43), 26 states have return successors, (41), 40 states have call predecessors, (41), 41 states have call successors, (41) [2022-01-31 15:05:58,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 255 transitions. [2022-01-31 15:05:58,278 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 255 transitions. Word has length 82 [2022-01-31 15:05:58,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 15:05:58,278 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 255 transitions. [2022-01-31 15:05:58,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-01-31 15:05:58,278 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 255 transitions. [2022-01-31 15:05:58,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-01-31 15:05:58,282 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 15:05:58,282 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 15:05:58,300 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 15:05:58,500 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,SelfDestructingSolverStorable12 [2022-01-31 15:05:58,501 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 15:05:58,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 15:05:58,501 INFO L85 PathProgramCache]: Analyzing trace with hash -2090333941, now seen corresponding path program 2 times [2022-01-31 15:05:58,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 15:05:58,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699640453] [2022-01-31 15:05:58,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:05:58,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 15:05:58,507 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 15:05:58,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1387805500] [2022-01-31 15:05:58,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 15:05:58,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:05:58,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 15:05:58,517 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 15:05:58,518 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 15:05:58,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 15:05:58,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 15:05:58,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-31 15:05:58,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 15:05:59,019 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 26 proven. 30 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-01-31 15:05:59,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 15:06:14,036 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 26 proven. 30 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-01-31 15:06:14,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 15:06:14,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699640453] [2022-01-31 15:06:14,037 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 15:06:14,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387805500] [2022-01-31 15:06:14,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387805500] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 15:06:14,037 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 15:06:14,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-01-31 15:06:14,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932692672] [2022-01-31 15:06:14,037 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 15:06:14,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 15:06:14,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 15:06:14,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 15:06:14,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-01-31 15:06:14,038 INFO L87 Difference]: Start difference. First operand 217 states and 255 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 11 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2022-01-31 15:06:34,600 WARN L228 SmtUtils]: Spent 20.34s on a formula simplification. DAG size of input: 192 DAG size of output: 86 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 15:06:43,989 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 15:06:46,248 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 15:06:48,611 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 15:06:50,661 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 15:06:56,973 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 15:06:57,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 15:06:57,975 INFO L93 Difference]: Finished difference Result 293 states and 379 transitions. [2022-01-31 15:06:57,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 15:06:57,975 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 11 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) Word has length 94 [2022-01-31 15:06:57,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 15:06:57,977 INFO L225 Difference]: With dead ends: 293 [2022-01-31 15:06:57,977 INFO L226 Difference]: Without dead ends: 275 [2022-01-31 15:06:57,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 170 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 29.9s TimeCoverageRelationStatistics Valid=114, Invalid=305, Unknown=1, NotChecked=0, Total=420 [2022-01-31 15:06:57,977 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 125 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 193 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.4s IncrementalHoareTripleChecker+Time [2022-01-31 15:06:57,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 659 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 529 Invalid, 4 Unknown, 0 Unchecked, 16.4s Time] [2022-01-31 15:06:57,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-01-31 15:06:57,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 257. [2022-01-31 15:06:57,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 172 states have (on average 1.2267441860465116) internal successors, (211), 177 states have internal predecessors, (211), 57 states have call successors, (57), 28 states have call predecessors, (57), 27 states have return successors, (55), 51 states have call predecessors, (55), 55 states have call successors, (55) [2022-01-31 15:06:57,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 323 transitions. [2022-01-31 15:06:57,991 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 323 transitions. Word has length 94 [2022-01-31 15:06:57,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 15:06:57,992 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 323 transitions. [2022-01-31 15:06:57,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 11 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2022-01-31 15:06:57,992 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 323 transitions. [2022-01-31 15:06:57,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-01-31 15:06:57,993 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 15:06:57,993 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 15:06:58,011 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 15:06:58,193 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,SelfDestructingSolverStorable13 [2022-01-31 15:06:58,193 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 15:06:58,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 15:06:58,194 INFO L85 PathProgramCache]: Analyzing trace with hash -105290329, now seen corresponding path program 1 times [2022-01-31 15:06:58,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 15:06:58,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486512511] [2022-01-31 15:06:58,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:06:58,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 15:06:58,200 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 15:06:58,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1668909125] [2022-01-31 15:06:58,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:06:58,200 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:06:58,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 15:06:58,201 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 15:06:58,202 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 15:06:58,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:06:58,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-31 15:06:58,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 15:06:58,396 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 120 proven. 260 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-01-31 15:06:58,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 15:06:58,563 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2022-01-31 15:06:58,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 15:06:58,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486512511] [2022-01-31 15:06:58,564 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 15:06:58,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668909125] [2022-01-31 15:06:58,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668909125] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 15:06:58,564 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 15:06:58,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-01-31 15:06:58,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554806539] [2022-01-31 15:06:58,564 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 15:06:58,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 15:06:58,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 15:06:58,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 15:06:58,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-01-31 15:06:58,571 INFO L87 Difference]: Start difference. First operand 257 states and 323 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 12 states have call successors, (32), 8 states have call predecessors, (32), 8 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30) [2022-01-31 15:06:58,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 15:06:58,784 INFO L93 Difference]: Finished difference Result 661 states and 888 transitions. [2022-01-31 15:06:58,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 15:06:58,784 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 12 states have call successors, (32), 8 states have call predecessors, (32), 8 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30) Word has length 100 [2022-01-31 15:06:58,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 15:06:58,786 INFO L225 Difference]: With dead ends: 661 [2022-01-31 15:06:58,786 INFO L226 Difference]: Without dead ends: 659 [2022-01-31 15:06:58,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 187 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 15:06:58,789 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 148 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 15:06:58,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 400 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 15:06:58,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2022-01-31 15:06:58,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 552. [2022-01-31 15:06:58,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 361 states have (on average 1.2825484764542936) internal successors, (463), 378 states have internal predecessors, (463), 136 states have call successors, (136), 56 states have call predecessors, (136), 54 states have return successors, (131), 117 states have call predecessors, (131), 131 states have call successors, (131) [2022-01-31 15:06:58,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 730 transitions. [2022-01-31 15:06:58,809 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 730 transitions. Word has length 100 [2022-01-31 15:06:58,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 15:06:58,809 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 730 transitions. [2022-01-31 15:06:58,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 12 states have call successors, (32), 8 states have call predecessors, (32), 8 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30) [2022-01-31 15:06:58,809 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 730 transitions. [2022-01-31 15:06:58,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-01-31 15:06:58,811 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 15:06:58,811 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 15:06:58,835 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-01-31 15:06:59,035 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,SelfDestructingSolverStorable14 [2022-01-31 15:06:59,036 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 15:06:59,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 15:06:59,036 INFO L85 PathProgramCache]: Analyzing trace with hash 331614142, now seen corresponding path program 1 times [2022-01-31 15:06:59,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 15:06:59,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498370908] [2022-01-31 15:06:59,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:06:59,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 15:06:59,042 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 15:06:59,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2102627837] [2022-01-31 15:06:59,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:06:59,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:06:59,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 15:06:59,043 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 15:06:59,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-31 15:06:59,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:06:59,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-31 15:06:59,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 15:06:59,250 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 30 proven. 414 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-01-31 15:06:59,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 15:06:59,446 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 30 proven. 42 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-01-31 15:06:59,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 15:06:59,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498370908] [2022-01-31 15:06:59,446 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 15:06:59,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102627837] [2022-01-31 15:06:59,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102627837] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 15:06:59,446 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 15:06:59,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-01-31 15:06:59,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678685049] [2022-01-31 15:06:59,447 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 15:06:59,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 15:06:59,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 15:06:59,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 15:06:59,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-01-31 15:06:59,448 INFO L87 Difference]: Start difference. First operand 552 states and 730 transitions. Second operand has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 16 states have call successors, (34), 10 states have call predecessors, (34), 9 states have return successors, (32), 14 states have call predecessors, (32), 13 states have call successors, (32) [2022-01-31 15:06:59,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 15:06:59,791 INFO L93 Difference]: Finished difference Result 1124 states and 1476 transitions. [2022-01-31 15:06:59,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 15:06:59,792 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 16 states have call successors, (34), 10 states have call predecessors, (34), 9 states have return successors, (32), 14 states have call predecessors, (32), 13 states have call successors, (32) Word has length 108 [2022-01-31 15:06:59,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 15:06:59,795 INFO L225 Difference]: With dead ends: 1124 [2022-01-31 15:06:59,796 INFO L226 Difference]: Without dead ends: 1122 [2022-01-31 15:06:59,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=259, Invalid=497, Unknown=0, NotChecked=0, Total=756 [2022-01-31 15:06:59,796 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 328 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 15:06:59,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 500 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 15:06:59,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2022-01-31 15:06:59,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 1097. [2022-01-31 15:06:59,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1097 states, 729 states have (on average 1.2455418381344308) internal successors, (908), 758 states have internal predecessors, (908), 279 states have call successors, (279), 90 states have call predecessors, (279), 88 states have return successors, (270), 248 states have call predecessors, (270), 270 states have call successors, (270) [2022-01-31 15:06:59,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 1457 transitions. [2022-01-31 15:06:59,816 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 1457 transitions. Word has length 108 [2022-01-31 15:06:59,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 15:06:59,816 INFO L470 AbstractCegarLoop]: Abstraction has 1097 states and 1457 transitions. [2022-01-31 15:06:59,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 16 states have call successors, (34), 10 states have call predecessors, (34), 9 states have return successors, (32), 14 states have call predecessors, (32), 13 states have call successors, (32) [2022-01-31 15:06:59,816 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 1457 transitions. [2022-01-31 15:06:59,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-01-31 15:06:59,817 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 15:06:59,817 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 15:06:59,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-31 15:07:00,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-31 15:07:00,036 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 15:07:00,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 15:07:00,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1288142005, now seen corresponding path program 1 times [2022-01-31 15:07:00,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 15:07:00,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223861076] [2022-01-31 15:07:00,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:07:00,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 15:07:00,042 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 15:07:00,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1487375679] [2022-01-31 15:07:00,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:07:00,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:07:00,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 15:07:00,047 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 15:07:00,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-31 15:07:00,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:07:00,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-31 15:07:00,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 15:07:00,330 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 32 proven. 34 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-01-31 15:07:00,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 15:07:01,094 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 32 proven. 34 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-01-31 15:07:01,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 15:07:01,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223861076] [2022-01-31 15:07:01,094 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 15:07:01,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487375679] [2022-01-31 15:07:01,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487375679] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 15:07:01,095 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 15:07:01,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-01-31 15:07:01,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979571799] [2022-01-31 15:07:01,095 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 15:07:01,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 15:07:01,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 15:07:01,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 15:07:01,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-01-31 15:07:01,096 INFO L87 Difference]: Start difference. First operand 1097 states and 1457 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 7 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (33), 7 states have call predecessors, (33), 7 states have call successors, (33) [2022-01-31 15:07:01,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 15:07:01,353 INFO L93 Difference]: Finished difference Result 1101 states and 1461 transitions. [2022-01-31 15:07:01,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 15:07:01,360 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 7 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (33), 7 states have call predecessors, (33), 7 states have call successors, (33) Word has length 110 [2022-01-31 15:07:01,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 15:07:01,364 INFO L225 Difference]: With dead ends: 1101 [2022-01-31 15:07:01,364 INFO L226 Difference]: Without dead ends: 1097 [2022-01-31 15:07:01,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 207 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-01-31 15:07:01,364 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 3 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 15:07:01,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 350 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 15:07:01,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2022-01-31 15:07:01,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 1097. [2022-01-31 15:07:01,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1097 states, 729 states have (on average 1.242798353909465) internal successors, (906), 758 states have internal predecessors, (906), 279 states have call successors, (279), 90 states have call predecessors, (279), 88 states have return successors, (270), 248 states have call predecessors, (270), 270 states have call successors, (270) [2022-01-31 15:07:01,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 1455 transitions. [2022-01-31 15:07:01,384 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 1455 transitions. Word has length 110 [2022-01-31 15:07:01,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 15:07:01,384 INFO L470 AbstractCegarLoop]: Abstraction has 1097 states and 1455 transitions. [2022-01-31 15:07:01,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 7 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (33), 7 states have call predecessors, (33), 7 states have call successors, (33) [2022-01-31 15:07:01,384 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 1455 transitions. [2022-01-31 15:07:01,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-31 15:07:01,386 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 15:07:01,386 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 15:07:01,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-31 15:07:01,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-01-31 15:07:01,599 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 15:07:01,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 15:07:01,600 INFO L85 PathProgramCache]: Analyzing trace with hash 848408867, now seen corresponding path program 2 times [2022-01-31 15:07:01,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 15:07:01,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405617108] [2022-01-31 15:07:01,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:07:01,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 15:07:01,605 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 15:07:01,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [232072508] [2022-01-31 15:07:01,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 15:07:01,606 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:07:01,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 15:07:01,607 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 15:07:01,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-31 15:07:01,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 15:07:01,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 15:07:01,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 15:07:01,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 15:07:01,796 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 102 proven. 51 refuted. 0 times theorem prover too weak. 546 trivial. 0 not checked. [2022-01-31 15:07:01,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 15:07:02,127 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 69 proven. 18 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-01-31 15:07:02,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 15:07:02,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405617108] [2022-01-31 15:07:02,128 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 15:07:02,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232072508] [2022-01-31 15:07:02,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232072508] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 15:07:02,128 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 15:07:02,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-01-31 15:07:02,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862632282] [2022-01-31 15:07:02,128 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 15:07:02,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 15:07:02,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 15:07:02,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 15:07:02,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-01-31 15:07:02,129 INFO L87 Difference]: Start difference. First operand 1097 states and 1455 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 9 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (35), 9 states have call predecessors, (35), 9 states have call successors, (35) [2022-01-31 15:07:02,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 15:07:02,200 INFO L93 Difference]: Finished difference Result 947 states and 1203 transitions. [2022-01-31 15:07:02,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 15:07:02,200 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 9 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (35), 9 states have call predecessors, (35), 9 states have call successors, (35) Word has length 124 [2022-01-31 15:07:02,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 15:07:02,203 INFO L225 Difference]: With dead ends: 947 [2022-01-31 15:07:02,203 INFO L226 Difference]: Without dead ends: 907 [2022-01-31 15:07:02,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 237 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-01-31 15:07:02,204 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 3 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 15:07:02,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 262 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 15:07:02,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2022-01-31 15:07:02,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 905. [2022-01-31 15:07:02,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 598 states have (on average 1.2040133779264215) internal successors, (720), 627 states have internal predecessors, (720), 221 states have call successors, (221), 87 states have call predecessors, (221), 85 states have return successors, (212), 190 states have call predecessors, (212), 212 states have call successors, (212) [2022-01-31 15:07:02,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1153 transitions. [2022-01-31 15:07:02,219 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1153 transitions. Word has length 124 [2022-01-31 15:07:02,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 15:07:02,220 INFO L470 AbstractCegarLoop]: Abstraction has 905 states and 1153 transitions. [2022-01-31 15:07:02,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 9 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (35), 9 states have call predecessors, (35), 9 states have call successors, (35) [2022-01-31 15:07:02,220 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1153 transitions. [2022-01-31 15:07:02,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-01-31 15:07:02,221 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 15:07:02,221 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 15:07:02,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-31 15:07:02,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:07:02,425 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 15:07:02,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 15:07:02,425 INFO L85 PathProgramCache]: Analyzing trace with hash 722879610, now seen corresponding path program 3 times [2022-01-31 15:07:02,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 15:07:02,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831089982] [2022-01-31 15:07:02,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:07:02,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 15:07:02,434 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 15:07:02,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1855996328] [2022-01-31 15:07:02,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 15:07:02,434 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:07:02,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 15:07:02,435 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 15:07:02,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-31 15:07:02,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-31 15:07:02,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 15:07:02,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-31 15:07:02,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 15:07:02,760 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-31 15:07:02,825 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-31 15:07:02,889 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-31 15:07:03,047 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 145 proven. 2 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2022-01-31 15:07:03,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 15:07:14,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 15:07:14,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831089982] [2022-01-31 15:07:14,475 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 15:07:14,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855996328] [2022-01-31 15:07:14,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855996328] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 15:07:14,475 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-31 15:07:14,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-01-31 15:07:14,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318086753] [2022-01-31 15:07:14,476 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-31 15:07:14,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 15:07:14,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 15:07:14,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 15:07:14,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-01-31 15:07:14,477 INFO L87 Difference]: Start difference. First operand 905 states and 1153 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-31 15:07:14,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 15:07:14,554 INFO L93 Difference]: Finished difference Result 933 states and 1174 transitions. [2022-01-31 15:07:14,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 15:07:14,554 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 126 [2022-01-31 15:07:14,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 15:07:14,557 INFO L225 Difference]: With dead ends: 933 [2022-01-31 15:07:14,557 INFO L226 Difference]: Without dead ends: 921 [2022-01-31 15:07:14,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 120 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-01-31 15:07:14,558 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 25 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 15:07:14,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 115 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 15:07:14,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2022-01-31 15:07:14,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 695. [2022-01-31 15:07:14,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 468 states have (on average 1.1752136752136753) internal successors, (550), 470 states have internal predecessors, (550), 153 states have call successors, (153), 75 states have call predecessors, (153), 73 states have return successors, (150), 149 states have call predecessors, (150), 150 states have call successors, (150) [2022-01-31 15:07:14,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 853 transitions. [2022-01-31 15:07:14,572 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 853 transitions. Word has length 126 [2022-01-31 15:07:14,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 15:07:14,573 INFO L470 AbstractCegarLoop]: Abstraction has 695 states and 853 transitions. [2022-01-31 15:07:14,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-31 15:07:14,573 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 853 transitions. [2022-01-31 15:07:14,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-01-31 15:07:14,574 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 15:07:14,574 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 19, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 15:07:14,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-31 15:07:14,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:07:14,790 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 15:07:14,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 15:07:14,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1722143882, now seen corresponding path program 3 times [2022-01-31 15:07:14,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 15:07:14,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637149044] [2022-01-31 15:07:14,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:07:14,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 15:07:14,800 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 15:07:14,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1524973032] [2022-01-31 15:07:14,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 15:07:14,800 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:07:14,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 15:07:14,801 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 15:07:14,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-31 15:07:14,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-31 15:07:14,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 15:07:14,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 15:07:14,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 15:07:15,041 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 90 proven. 4 refuted. 0 times theorem prover too weak. 680 trivial. 0 not checked. [2022-01-31 15:07:15,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 15:07:15,225 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 90 proven. 4 refuted. 0 times theorem prover too weak. 680 trivial. 0 not checked. [2022-01-31 15:07:15,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 15:07:15,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637149044] [2022-01-31 15:07:15,225 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 15:07:15,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524973032] [2022-01-31 15:07:15,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524973032] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 15:07:15,226 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 15:07:15,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-01-31 15:07:15,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338745220] [2022-01-31 15:07:15,226 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 15:07:15,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 15:07:15,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 15:07:15,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 15:07:15,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-01-31 15:07:15,227 INFO L87 Difference]: Start difference. First operand 695 states and 853 transitions. Second operand has 12 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2022-01-31 15:07:15,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 15:07:15,326 INFO L93 Difference]: Finished difference Result 769 states and 909 transitions. [2022-01-31 15:07:15,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 15:07:15,327 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) Word has length 128 [2022-01-31 15:07:15,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 15:07:15,329 INFO L225 Difference]: With dead ends: 769 [2022-01-31 15:07:15,329 INFO L226 Difference]: Without dead ends: 755 [2022-01-31 15:07:15,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 245 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-01-31 15:07:15,329 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 26 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 15:07:15,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 152 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 15:07:15,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2022-01-31 15:07:15,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 539. [2022-01-31 15:07:15,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 362 states have (on average 1.1049723756906078) internal successors, (400), 373 states have internal predecessors, (400), 103 states have call successors, (103), 74 states have call predecessors, (103), 73 states have return successors, (101), 91 states have call predecessors, (101), 101 states have call successors, (101) [2022-01-31 15:07:15,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 604 transitions. [2022-01-31 15:07:15,338 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 604 transitions. Word has length 128 [2022-01-31 15:07:15,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 15:07:15,339 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 604 transitions. [2022-01-31 15:07:15,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2022-01-31 15:07:15,339 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 604 transitions. [2022-01-31 15:07:15,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2022-01-31 15:07:15,341 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 15:07:15,341 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 32, 11, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 15:07:15,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-31 15:07:15,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:07:15,551 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 15:07:15,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 15:07:15,552 INFO L85 PathProgramCache]: Analyzing trace with hash -206704767, now seen corresponding path program 2 times [2022-01-31 15:07:15,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 15:07:15,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860644164] [2022-01-31 15:07:15,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:07:15,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 15:07:15,559 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 15:07:15,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [382865331] [2022-01-31 15:07:15,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 15:07:15,559 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:07:15,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 15:07:15,560 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 15:07:15,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-31 15:07:15,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 15:07:15,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 15:07:15,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-31 15:07:15,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 15:07:16,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2374 backedges. 64 proven. 2222 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-01-31 15:07:16,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 15:07:16,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2374 backedges. 64 proven. 326 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2022-01-31 15:07:16,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 15:07:16,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860644164] [2022-01-31 15:07:16,372 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 15:07:16,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382865331] [2022-01-31 15:07:16,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382865331] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 15:07:16,372 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 15:07:16,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 24 [2022-01-31 15:07:16,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427195022] [2022-01-31 15:07:16,372 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 15:07:16,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 15:07:16,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 15:07:16,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 15:07:16,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-01-31 15:07:16,373 INFO L87 Difference]: Start difference. First operand 539 states and 604 transitions. Second operand has 24 states, 24 states have (on average 5.916666666666667) internal successors, (142), 24 states have internal predecessors, (142), 22 states have call successors, (68), 17 states have call predecessors, (68), 16 states have return successors, (66), 20 states have call predecessors, (66), 20 states have call successors, (66) [2022-01-31 15:07:16,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 15:07:16,835 INFO L93 Difference]: Finished difference Result 816 states and 923 transitions. [2022-01-31 15:07:16,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 15:07:16,836 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.916666666666667) internal successors, (142), 24 states have internal predecessors, (142), 22 states have call successors, (68), 17 states have call predecessors, (68), 16 states have return successors, (66), 20 states have call predecessors, (66), 20 states have call successors, (66) Word has length 224 [2022-01-31 15:07:16,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 15:07:16,838 INFO L225 Difference]: With dead ends: 816 [2022-01-31 15:07:16,838 INFO L226 Difference]: Without dead ends: 816 [2022-01-31 15:07:16,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 424 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=517, Invalid=965, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 15:07:16,839 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 349 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 15:07:16,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [349 Valid, 486 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 15:07:16,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2022-01-31 15:07:16,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 815. [2022-01-31 15:07:16,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 815 states, 548 states have (on average 1.1131386861313868) internal successors, (610), 565 states have internal predecessors, (610), 157 states have call successors, (157), 110 states have call predecessors, (157), 109 states have return successors, (155), 139 states have call predecessors, (155), 155 states have call successors, (155) [2022-01-31 15:07:16,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 922 transitions. [2022-01-31 15:07:16,852 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 922 transitions. Word has length 224 [2022-01-31 15:07:16,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 15:07:16,852 INFO L470 AbstractCegarLoop]: Abstraction has 815 states and 922 transitions. [2022-01-31 15:07:16,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.916666666666667) internal successors, (142), 24 states have internal predecessors, (142), 22 states have call successors, (68), 17 states have call predecessors, (68), 16 states have return successors, (66), 20 states have call predecessors, (66), 20 states have call successors, (66) [2022-01-31 15:07:16,852 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 922 transitions. [2022-01-31 15:07:16,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2022-01-31 15:07:16,855 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 15:07:16,855 INFO L514 BasicCegarLoop]: trace histogram [45, 44, 44, 17, 16, 16, 16, 16, 16, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 15:07:16,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-31 15:07:17,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:07:17,061 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 15:07:17,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 15:07:17,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1664620565, now seen corresponding path program 3 times [2022-01-31 15:07:17,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 15:07:17,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694737792] [2022-01-31 15:07:17,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:07:17,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 15:07:17,070 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 15:07:17,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1496333252] [2022-01-31 15:07:17,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 15:07:17,070 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:07:17,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 15:07:17,071 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 15:07:17,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-31 15:07:17,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2022-01-31 15:07:17,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 15:07:17,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 738 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-31 15:07:17,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 15:07:17,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4660 backedges. 2247 proven. 69 refuted. 0 times theorem prover too weak. 2344 trivial. 0 not checked. [2022-01-31 15:07:17,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 15:07:19,557 INFO L134 CoverageAnalysis]: Checked inductivity of 4660 backedges. 491 proven. 85 refuted. 0 times theorem prover too weak. 4084 trivial. 0 not checked. [2022-01-31 15:07:19,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 15:07:19,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694737792] [2022-01-31 15:07:19,558 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 15:07:19,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496333252] [2022-01-31 15:07:19,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496333252] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 15:07:19,558 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 15:07:19,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2022-01-31 15:07:19,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30615000] [2022-01-31 15:07:19,558 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 15:07:19,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 15:07:19,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 15:07:19,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 15:07:19,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-01-31 15:07:19,559 INFO L87 Difference]: Start difference. First operand 815 states and 922 transitions. Second operand has 11 states, 11 states have (on average 6.818181818181818) internal successors, (75), 11 states have internal predecessors, (75), 11 states have call successors, (49), 2 states have call predecessors, (49), 2 states have return successors, (47), 11 states have call predecessors, (47), 11 states have call successors, (47) [2022-01-31 15:07:19,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 15:07:19,892 INFO L93 Difference]: Finished difference Result 923 states and 1075 transitions. [2022-01-31 15:07:19,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 15:07:19,894 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.818181818181818) internal successors, (75), 11 states have internal predecessors, (75), 11 states have call successors, (49), 2 states have call predecessors, (49), 2 states have return successors, (47), 11 states have call predecessors, (47), 11 states have call successors, (47) Word has length 308 [2022-01-31 15:07:19,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 15:07:19,896 INFO L225 Difference]: With dead ends: 923 [2022-01-31 15:07:19,896 INFO L226 Difference]: Without dead ends: 731 [2022-01-31 15:07:19,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 617 GetRequests, 603 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-01-31 15:07:19,896 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 19 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 15:07:19,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 376 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 15:07:19,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2022-01-31 15:07:19,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 731. [2022-01-31 15:07:19,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 731 states, 491 states have (on average 1.1079429735234216) internal successors, (544), 505 states have internal predecessors, (544), 139 states have call successors, (139), 101 states have call predecessors, (139), 100 states have return successors, (137), 124 states have call predecessors, (137), 137 states have call successors, (137) [2022-01-31 15:07:19,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 820 transitions. [2022-01-31 15:07:19,907 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 820 transitions. Word has length 308 [2022-01-31 15:07:19,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 15:07:19,907 INFO L470 AbstractCegarLoop]: Abstraction has 731 states and 820 transitions. [2022-01-31 15:07:19,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.818181818181818) internal successors, (75), 11 states have internal predecessors, (75), 11 states have call successors, (49), 2 states have call predecessors, (49), 2 states have return successors, (47), 11 states have call predecessors, (47), 11 states have call successors, (47) [2022-01-31 15:07:19,907 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 820 transitions. [2022-01-31 15:07:19,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2022-01-31 15:07:19,910 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 15:07:19,910 INFO L514 BasicCegarLoop]: trace histogram [49, 48, 48, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 15:07:19,929 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-01-31 15:07:20,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:07:20,119 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 15:07:20,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 15:07:20,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1611585699, now seen corresponding path program 2 times [2022-01-31 15:07:20,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 15:07:20,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59326977] [2022-01-31 15:07:20,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:07:20,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 15:07:20,128 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 15:07:20,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [445724426] [2022-01-31 15:07:20,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 15:07:20,128 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:07:20,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 15:07:20,129 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 15:07:20,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-31 15:07:20,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 15:07:20,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 15:07:20,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 747 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-31 15:07:20,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 15:07:20,640 INFO L134 CoverageAnalysis]: Checked inductivity of 5132 backedges. 2220 proven. 1910 refuted. 0 times theorem prover too weak. 1002 trivial. 0 not checked. [2022-01-31 15:07:20,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 15:07:21,148 INFO L134 CoverageAnalysis]: Checked inductivity of 5132 backedges. 96 proven. 290 refuted. 0 times theorem prover too weak. 4746 trivial. 0 not checked. [2022-01-31 15:07:21,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 15:07:21,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59326977] [2022-01-31 15:07:21,149 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 15:07:21,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445724426] [2022-01-31 15:07:21,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445724426] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 15:07:21,149 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 15:07:21,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2022-01-31 15:07:21,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556417752] [2022-01-31 15:07:21,149 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 15:07:21,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 15:07:21,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 15:07:21,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 15:07:21,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-01-31 15:07:21,151 INFO L87 Difference]: Start difference. First operand 731 states and 820 transitions. Second operand has 24 states, 24 states have (on average 4.583333333333333) internal successors, (110), 24 states have internal predecessors, (110), 22 states have call successors, (68), 13 states have call predecessors, (68), 13 states have return successors, (66), 21 states have call predecessors, (66), 21 states have call successors, (66) [2022-01-31 15:07:21,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 15:07:21,611 INFO L93 Difference]: Finished difference Result 733 states and 813 transitions. [2022-01-31 15:07:21,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 15:07:21,612 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.583333333333333) internal successors, (110), 24 states have internal predecessors, (110), 22 states have call successors, (68), 13 states have call predecessors, (68), 13 states have return successors, (66), 21 states have call predecessors, (66), 21 states have call successors, (66) Word has length 320 [2022-01-31 15:07:21,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 15:07:21,614 INFO L225 Difference]: With dead ends: 733 [2022-01-31 15:07:21,614 INFO L226 Difference]: Without dead ends: 733 [2022-01-31 15:07:21,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 658 GetRequests, 616 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=665, Invalid=1141, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 15:07:21,615 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 261 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 15:07:21,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 446 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 15:07:21,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2022-01-31 15:07:21,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 733. [2022-01-31 15:07:21,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 493 states have (on average 1.0892494929006085) internal successors, (537), 507 states have internal predecessors, (537), 139 states have call successors, (139), 101 states have call predecessors, (139), 100 states have return successors, (137), 124 states have call predecessors, (137), 137 states have call successors, (137) [2022-01-31 15:07:21,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 813 transitions. [2022-01-31 15:07:21,624 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 813 transitions. Word has length 320 [2022-01-31 15:07:21,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 15:07:21,624 INFO L470 AbstractCegarLoop]: Abstraction has 733 states and 813 transitions. [2022-01-31 15:07:21,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.583333333333333) internal successors, (110), 24 states have internal predecessors, (110), 22 states have call successors, (68), 13 states have call predecessors, (68), 13 states have return successors, (66), 21 states have call predecessors, (66), 21 states have call successors, (66) [2022-01-31 15:07:21,625 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 813 transitions. [2022-01-31 15:07:21,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2022-01-31 15:07:21,627 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 15:07:21,628 INFO L514 BasicCegarLoop]: trace histogram [48, 47, 47, 14, 13, 13, 13, 13, 13, 13, 13, 7, 7, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 15:07:21,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-31 15:07:21,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:07:21,845 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 15:07:21,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 15:07:21,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1950046478, now seen corresponding path program 4 times [2022-01-31 15:07:21,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 15:07:21,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112479944] [2022-01-31 15:07:21,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:07:21,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 15:07:21,853 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 15:07:21,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1048778183] [2022-01-31 15:07:21,855 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 15:07:21,855 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:07:21,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 15:07:21,856 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 15:07:21,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-31 15:07:36,774 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 15:07:36,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 15:07:36,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 759 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-31 15:07:36,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 15:07:37,168 INFO L134 CoverageAnalysis]: Checked inductivity of 5038 backedges. 2016 proven. 246 refuted. 0 times theorem prover too weak. 2776 trivial. 0 not checked. [2022-01-31 15:07:37,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 15:07:38,916 INFO L134 CoverageAnalysis]: Checked inductivity of 5038 backedges. 389 proven. 217 refuted. 0 times theorem prover too weak. 4432 trivial. 0 not checked. [2022-01-31 15:07:38,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 15:07:38,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112479944] [2022-01-31 15:07:38,916 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 15:07:38,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048778183] [2022-01-31 15:07:38,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048778183] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 15:07:38,916 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 15:07:38,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2022-01-31 15:07:38,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384454913] [2022-01-31 15:07:38,917 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 15:07:38,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 15:07:38,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 15:07:38,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 15:07:38,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-01-31 15:07:38,918 INFO L87 Difference]: Start difference. First operand 733 states and 813 transitions. Second operand has 15 states, 15 states have (on average 7.066666666666666) internal successors, (106), 15 states have internal predecessors, (106), 15 states have call successors, (72), 2 states have call predecessors, (72), 2 states have return successors, (70), 15 states have call predecessors, (70), 15 states have call successors, (70) [2022-01-31 15:07:39,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 15:07:39,111 INFO L93 Difference]: Finished difference Result 793 states and 900 transitions. [2022-01-31 15:07:39,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 15:07:39,114 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 7.066666666666666) internal successors, (106), 15 states have internal predecessors, (106), 15 states have call successors, (72), 2 states have call predecessors, (72), 2 states have return successors, (70), 15 states have call predecessors, (70), 15 states have call successors, (70) Word has length 320 [2022-01-31 15:07:39,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 15:07:39,116 INFO L225 Difference]: With dead ends: 793 [2022-01-31 15:07:39,116 INFO L226 Difference]: Without dead ends: 705 [2022-01-31 15:07:39,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 639 GetRequests, 623 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-01-31 15:07:39,117 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 12 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 873 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 15:07:39,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 873 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 15:07:39,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2022-01-31 15:07:39,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 705. [2022-01-31 15:07:39,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 474 states have (on average 1.0864978902953586) internal successors, (515), 487 states have internal predecessors, (515), 133 states have call successors, (133), 98 states have call predecessors, (133), 97 states have return successors, (131), 119 states have call predecessors, (131), 131 states have call successors, (131) [2022-01-31 15:07:39,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 779 transitions. [2022-01-31 15:07:39,126 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 779 transitions. Word has length 320 [2022-01-31 15:07:39,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 15:07:39,126 INFO L470 AbstractCegarLoop]: Abstraction has 705 states and 779 transitions. [2022-01-31 15:07:39,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.066666666666666) internal successors, (106), 15 states have internal predecessors, (106), 15 states have call successors, (72), 2 states have call predecessors, (72), 2 states have return successors, (70), 15 states have call predecessors, (70), 15 states have call successors, (70) [2022-01-31 15:07:39,126 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 779 transitions. [2022-01-31 15:07:39,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2022-01-31 15:07:39,128 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 15:07:39,128 INFO L514 BasicCegarLoop]: trace histogram [49, 48, 48, 13, 12, 12, 12, 12, 12, 12, 12, 8, 8, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 15:07:39,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-31 15:07:39,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-01-31 15:07:39,340 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 15:07:39,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 15:07:39,341 INFO L85 PathProgramCache]: Analyzing trace with hash 179823329, now seen corresponding path program 5 times [2022-01-31 15:07:39,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 15:07:39,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548565443] [2022-01-31 15:07:39,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:07:39,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 15:07:39,353 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 15:07:39,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1157609346] [2022-01-31 15:07:39,353 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 15:07:39,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:07:39,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 15:07:39,354 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 15:07:39,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-31 15:07:52,709 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-01-31 15:07:52,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 15:07:52,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 763 conjuncts, 38 conjunts are in the unsatisfiable core [2022-01-31 15:07:52,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 15:07:53,118 INFO L134 CoverageAnalysis]: Checked inductivity of 5196 backedges. 1571 proven. 329 refuted. 0 times theorem prover too weak. 3296 trivial. 0 not checked. [2022-01-31 15:07:53,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 15:07:57,938 INFO L134 CoverageAnalysis]: Checked inductivity of 5196 backedges. 397 proven. 239 refuted. 0 times theorem prover too weak. 4560 trivial. 0 not checked. [2022-01-31 15:07:57,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 15:07:57,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548565443] [2022-01-31 15:07:57,939 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 15:07:57,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157609346] [2022-01-31 15:07:57,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157609346] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 15:07:57,939 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 15:07:57,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-01-31 15:07:57,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152615286] [2022-01-31 15:07:57,939 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 15:07:57,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 15:07:57,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 15:07:57,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 15:07:57,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-01-31 15:07:57,940 INFO L87 Difference]: Start difference. First operand 705 states and 779 transitions. Second operand has 17 states, 17 states have (on average 7.0588235294117645) internal successors, (120), 17 states have internal predecessors, (120), 17 states have call successors, (82), 2 states have call predecessors, (82), 2 states have return successors, (80), 17 states have call predecessors, (80), 17 states have call successors, (80) [2022-01-31 15:07:58,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 15:07:58,150 INFO L93 Difference]: Finished difference Result 777 states and 884 transitions. [2022-01-31 15:07:58,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 15:07:58,155 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 7.0588235294117645) internal successors, (120), 17 states have internal predecessors, (120), 17 states have call successors, (82), 2 states have call predecessors, (82), 2 states have return successors, (80), 17 states have call predecessors, (80), 17 states have call successors, (80) Word has length 324 [2022-01-31 15:07:58,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 15:07:58,157 INFO L225 Difference]: With dead ends: 777 [2022-01-31 15:07:58,158 INFO L226 Difference]: Without dead ends: 677 [2022-01-31 15:07:58,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 647 GetRequests, 626 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-01-31 15:07:58,158 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 25 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 15:07:58,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 527 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 15:07:58,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2022-01-31 15:07:58,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 677. [2022-01-31 15:07:58,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 455 states have (on average 1.0835164835164834) internal successors, (493), 467 states have internal predecessors, (493), 127 states have call successors, (127), 95 states have call predecessors, (127), 94 states have return successors, (125), 114 states have call predecessors, (125), 125 states have call successors, (125) [2022-01-31 15:07:58,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 745 transitions. [2022-01-31 15:07:58,168 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 745 transitions. Word has length 324 [2022-01-31 15:07:58,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 15:07:58,168 INFO L470 AbstractCegarLoop]: Abstraction has 677 states and 745 transitions. [2022-01-31 15:07:58,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.0588235294117645) internal successors, (120), 17 states have internal predecessors, (120), 17 states have call successors, (82), 2 states have call predecessors, (82), 2 states have return successors, (80), 17 states have call predecessors, (80), 17 states have call successors, (80) [2022-01-31 15:07:58,169 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 745 transitions. [2022-01-31 15:07:58,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2022-01-31 15:07:58,170 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 15:07:58,171 INFO L514 BasicCegarLoop]: trace histogram [50, 49, 49, 12, 11, 11, 11, 11, 11, 11, 11, 9, 9, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 15:07:58,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-31 15:07:58,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-01-31 15:07:58,384 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 15:07:58,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 15:07:58,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1085750924, now seen corresponding path program 6 times [2022-01-31 15:07:58,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 15:07:58,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608544734] [2022-01-31 15:07:58,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:07:58,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 15:07:58,399 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 15:07:58,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2099440164] [2022-01-31 15:07:58,399 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 15:07:58,400 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:07:58,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 15:07:58,401 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 15:07:58,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-31 15:07:58,763 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2022-01-31 15:07:58,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 15:07:58,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 767 conjuncts, 115 conjunts are in the unsatisfiable core [2022-01-31 15:07:58,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 15:08:00,315 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 1317 proven. 541 refuted. 0 times theorem prover too weak. 3512 trivial. 0 not checked. [2022-01-31 15:08:00,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 15:08:26,639 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-31 15:09:04,604 WARN L228 SmtUtils]: Spent 12.72s on a formula simplification that was a NOOP. DAG size: 165 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 15:09:54,075 WARN L228 SmtUtils]: Spent 24.46s on a formula simplification that was a NOOP. DAG size: 104 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)