/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/array-programs/partial_mod_count_limited_3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 09:22:14,853 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 09:22:14,854 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 09:22:14,898 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 09:22:14,911 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 09:22:14,913 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 09:22:14,915 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 09:22:14,919 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 09:22:14,920 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 09:22:14,924 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 09:22:14,924 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 09:22:14,925 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 09:22:14,925 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 09:22:14,925 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 09:22:14,926 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 09:22:14,927 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 09:22:14,927 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 09:22:14,927 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 09:22:14,928 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 09:22:14,929 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 09:22:14,930 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 09:22:14,932 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 09:22:14,932 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 09:22:14,933 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 09:22:14,934 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 09:22:14,939 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 09:22:14,939 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 09:22:14,939 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 09:22:14,946 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 09:22:14,958 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 09:22:14,958 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 09:22:14,959 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 09:22:14,959 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 09:22:14,959 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 09:22:14,959 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 09:22:14,960 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 09:22:14,960 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 09:22:14,960 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 09:22:14,960 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 09:22:14,960 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 09:22:14,960 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 09:22:14,960 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 09:22:14,961 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 09:22:14,961 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 09:22:14,961 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 09:22:14,961 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 09:22:14,961 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 09:22:14,961 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 09:22:14,961 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 09:22:14,961 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 09:22:14,962 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 09:22:14,962 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 09:22:15,155 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 09:22:15,175 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 09:22:15,177 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 09:22:15,177 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 09:22:15,178 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 09:22:15,179 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-programs/partial_mod_count_limited_3.c [2022-01-31 09:22:15,243 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01e102ac1/98e8a445273a42899323e868c7f3596c/FLAGcb9e48b04 [2022-01-31 09:22:15,555 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 09:22:15,555 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-programs/partial_mod_count_limited_3.c [2022-01-31 09:22:15,568 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01e102ac1/98e8a445273a42899323e868c7f3596c/FLAGcb9e48b04 [2022-01-31 09:22:15,983 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01e102ac1/98e8a445273a42899323e868c7f3596c [2022-01-31 09:22:15,985 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 09:22:15,986 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 09:22:15,987 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 09:22:15,987 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 09:22:15,989 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 09:22:15,990 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 09:22:15" (1/1) ... [2022-01-31 09:22:15,991 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@126c5eb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:22:15, skipping insertion in model container [2022-01-31 09:22:15,991 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 09:22:15" (1/1) ... [2022-01-31 09:22:15,995 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 09:22:16,003 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 09:22:16,131 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-programs/partial_mod_count_limited_3.c[331,344] [2022-01-31 09:22:16,154 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 09:22:16,159 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 09:22:16,166 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-programs/partial_mod_count_limited_3.c[331,344] [2022-01-31 09:22:16,171 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 09:22:16,180 INFO L208 MainTranslator]: Completed translation [2022-01-31 09:22:16,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:22:16 WrapperNode [2022-01-31 09:22:16,180 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 09:22:16,181 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 09:22:16,181 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 09:22:16,181 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 09:22:16,188 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:22:16" (1/1) ... [2022-01-31 09:22:16,189 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:22:16" (1/1) ... [2022-01-31 09:22:16,193 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:22:16" (1/1) ... [2022-01-31 09:22:16,193 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:22:16" (1/1) ... [2022-01-31 09:22:16,197 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:22:16" (1/1) ... [2022-01-31 09:22:16,199 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:22:16" (1/1) ... [2022-01-31 09:22:16,200 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:22:16" (1/1) ... [2022-01-31 09:22:16,201 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 09:22:16,202 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 09:22:16,202 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 09:22:16,203 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 09:22:16,203 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:22:16" (1/1) ... [2022-01-31 09:22:16,208 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 09:22:16,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:22:16,227 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 09:22:16,240 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 09:22:16,251 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 09:22:16,252 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 09:22:16,252 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 09:22:16,253 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 09:22:16,253 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 09:22:16,253 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 09:22:16,261 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 09:22:16,261 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 09:22:16,261 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 09:22:16,261 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 09:22:16,261 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 09:22:16,261 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 09:22:16,261 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 09:22:16,262 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 09:22:16,262 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 09:22:16,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 09:22:16,262 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 09:22:16,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 09:22:16,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 09:22:16,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 09:22:16,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 09:22:16,304 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 09:22:16,305 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 09:22:16,405 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 09:22:16,409 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 09:22:16,409 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 09:22:16,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:22:16 BoogieIcfgContainer [2022-01-31 09:22:16,410 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 09:22:16,411 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 09:22:16,411 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 09:22:16,412 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 09:22:16,414 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:22:16" (1/1) ... [2022-01-31 09:22:16,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 09:22:16 BasicIcfg [2022-01-31 09:22:16,426 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 09:22:16,427 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 09:22:16,427 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 09:22:16,430 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 09:22:16,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 09:22:15" (1/4) ... [2022-01-31 09:22:16,431 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3abeb823 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 09:22:16, skipping insertion in model container [2022-01-31 09:22:16,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:22:16" (2/4) ... [2022-01-31 09:22:16,431 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3abeb823 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 09:22:16, skipping insertion in model container [2022-01-31 09:22:16,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:22:16" (3/4) ... [2022-01-31 09:22:16,431 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3abeb823 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 09:22:16, skipping insertion in model container [2022-01-31 09:22:16,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 09:22:16" (4/4) ... [2022-01-31 09:22:16,432 INFO L111 eAbstractionObserver]: Analyzing ICFG partial_mod_count_limited_3.cJordan [2022-01-31 09:22:16,435 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 09:22:16,435 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 09:22:16,476 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 09:22:16,480 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 09:22:16,481 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 09:22:16,489 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 23 states have (on average 1.434782608695652) internal successors, (33), 24 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:22:16,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 09:22:16,494 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:22:16,494 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:22:16,494 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:22:16,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:22:16,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1836216133, now seen corresponding path program 1 times [2022-01-31 09:22:16,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:22:16,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845468751] [2022-01-31 09:22:16,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:22:16,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:22:16,628 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:22:16,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [418944917] [2022-01-31 09:22:16,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:22:16,630 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:22:16,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:22:16,631 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 09:22:16,650 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 09:22:16,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:22:16,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-31 09:22:16,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:22:16,780 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 09:22:16,780 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 09:22:16,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:22:16,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845468751] [2022-01-31 09:22:16,782 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:22:16,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418944917] [2022-01-31 09:22:16,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418944917] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:22:16,783 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:22:16,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-31 09:22:16,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358000075] [2022-01-31 09:22:16,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:22:16,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-31 09:22:16,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:22:16,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-31 09:22:16,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-31 09:22:16,821 INFO L87 Difference]: Start difference. First operand has 33 states, 23 states have (on average 1.434782608695652) internal successors, (33), 24 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 09:22:16,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:22:16,834 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2022-01-31 09:22:16,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-31 09:22:16,835 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2022-01-31 09:22:16,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:22:16,845 INFO L225 Difference]: With dead ends: 33 [2022-01-31 09:22:16,845 INFO L226 Difference]: Without dead ends: 28 [2022-01-31 09:22:16,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-31 09:22:16,849 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 09:22:16,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 09:22:16,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-31 09:22:16,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-01-31 09:22:16,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 09:22:16,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-01-31 09:22:16,871 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 20 [2022-01-31 09:22:16,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:22:16,871 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-01-31 09:22:16,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 09:22:16,872 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-01-31 09:22:16,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 09:22:16,872 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:22:16,872 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:22:16,892 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 09:22:17,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-01-31 09:22:17,085 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:22:17,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:22:17,092 INFO L85 PathProgramCache]: Analyzing trace with hash 35676921, now seen corresponding path program 1 times [2022-01-31 09:22:17,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:22:17,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340597350] [2022-01-31 09:22:17,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:22:17,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:22:17,104 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:22:17,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1253306762] [2022-01-31 09:22:17,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:22:17,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:22:17,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:22:17,106 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 09:22:17,107 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 09:22:17,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:22:17,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 09:22:17,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:22:17,216 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 09:22:17,217 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 09:22:17,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:22:17,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340597350] [2022-01-31 09:22:17,217 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:22:17,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253306762] [2022-01-31 09:22:17,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253306762] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:22:17,217 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:22:17,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 09:22:17,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790366576] [2022-01-31 09:22:17,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:22:17,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 09:22:17,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:22:17,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 09:22:17,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-31 09:22:17,219 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 09:22:17,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:22:17,260 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2022-01-31 09:22:17,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 09:22:17,260 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-01-31 09:22:17,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:22:17,262 INFO L225 Difference]: With dead ends: 37 [2022-01-31 09:22:17,262 INFO L226 Difference]: Without dead ends: 37 [2022-01-31 09:22:17,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-31 09:22:17,263 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 28 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 09:22:17,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 38 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 09:22:17,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-31 09:22:17,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2022-01-31 09:22:17,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 09:22:17,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-01-31 09:22:17,269 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2022-01-31 09:22:17,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:22:17,269 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-01-31 09:22:17,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 09:22:17,270 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-01-31 09:22:17,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-31 09:22:17,270 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:22:17,270 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:22:17,290 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 09:22:17,485 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,SelfDestructingSolverStorable1 [2022-01-31 09:22:17,486 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:22:17,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:22:17,487 INFO L85 PathProgramCache]: Analyzing trace with hash -168804664, now seen corresponding path program 1 times [2022-01-31 09:22:17,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:22:17,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491827412] [2022-01-31 09:22:17,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:22:17,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:22:17,510 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:22:17,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1108204391] [2022-01-31 09:22:17,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:22:17,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:22:17,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:22:17,530 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 09:22:17,531 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 09:22:17,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:22:17,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 09:22:17,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:22:17,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:22:17,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:22:17,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:22:17,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:22:17,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491827412] [2022-01-31 09:22:17,772 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:22:17,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108204391] [2022-01-31 09:22:17,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108204391] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:22:17,772 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 09:22:17,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-01-31 09:22:17,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440183487] [2022-01-31 09:22:17,773 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 09:22:17,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 09:22:17,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:22:17,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 09:22:17,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-01-31 09:22:17,774 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 09:22:17,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:22:17,900 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2022-01-31 09:22:17,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 09:22:17,901 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 25 [2022-01-31 09:22:17,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:22:17,902 INFO L225 Difference]: With dead ends: 57 [2022-01-31 09:22:17,902 INFO L226 Difference]: Without dead ends: 57 [2022-01-31 09:22:17,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-01-31 09:22:17,903 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 91 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:22:17,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 66 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:22:17,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-01-31 09:22:17,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 44. [2022-01-31 09:22:17,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 36 states have (on average 1.25) internal successors, (45), 36 states have internal predecessors, (45), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 09:22:17,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2022-01-31 09:22:17,908 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 25 [2022-01-31 09:22:17,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:22:17,908 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2022-01-31 09:22:17,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 09:22:17,908 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2022-01-31 09:22:17,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 09:22:17,909 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:22:17,909 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:22:17,928 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-01-31 09:22:18,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:22:18,124 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:22:18,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:22:18,124 INFO L85 PathProgramCache]: Analyzing trace with hash -760694183, now seen corresponding path program 1 times [2022-01-31 09:22:18,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:22:18,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39758575] [2022-01-31 09:22:18,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:22:18,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:22:18,143 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:22:18,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1841373996] [2022-01-31 09:22:18,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:22:18,143 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:22:18,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:22:18,144 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 09:22:18,153 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 09:22:18,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:22:18,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 09:22:18,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:22:18,342 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:22:18,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:22:18,440 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:22:18,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:22:18,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39758575] [2022-01-31 09:22:18,441 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:22:18,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841373996] [2022-01-31 09:22:18,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841373996] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:22:18,441 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 09:22:18,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-01-31 09:22:18,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433512171] [2022-01-31 09:22:18,441 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 09:22:18,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 09:22:18,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:22:18,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 09:22:18,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2022-01-31 09:22:18,443 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 09:22:18,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:22:18,643 INFO L93 Difference]: Finished difference Result 111 states and 146 transitions. [2022-01-31 09:22:18,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 09:22:18,643 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 40 [2022-01-31 09:22:18,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:22:18,644 INFO L225 Difference]: With dead ends: 111 [2022-01-31 09:22:18,644 INFO L226 Difference]: Without dead ends: 111 [2022-01-31 09:22:18,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2022-01-31 09:22:18,645 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 231 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:22:18,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 100 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:22:18,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-01-31 09:22:18,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 74. [2022-01-31 09:22:18,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 66 states have (on average 1.2727272727272727) internal successors, (84), 66 states have internal predecessors, (84), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 09:22:18,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2022-01-31 09:22:18,652 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 40 [2022-01-31 09:22:18,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:22:18,652 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2022-01-31 09:22:18,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 09:22:18,652 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2022-01-31 09:22:18,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 09:22:18,653 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:22:18,653 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:22:18,673 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 09:22:18,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:22:18,871 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:22:18,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:22:18,871 INFO L85 PathProgramCache]: Analyzing trace with hash 961270586, now seen corresponding path program 2 times [2022-01-31 09:22:18,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:22:18,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548452592] [2022-01-31 09:22:18,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:22:18,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:22:18,889 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:22:18,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [475717213] [2022-01-31 09:22:18,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 09:22:18,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:22:18,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:22:18,890 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 09:22:18,891 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 09:22:18,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-01-31 09:22:18,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:22:18,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-31 09:22:18,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:22:19,304 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2022-01-31 09:22:19,304 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 09:22:19,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:22:19,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548452592] [2022-01-31 09:22:19,304 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:22:19,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475717213] [2022-01-31 09:22:19,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475717213] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:22:19,304 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:22:19,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 09:22:19,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712546771] [2022-01-31 09:22:19,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:22:19,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 09:22:19,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:22:19,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 09:22:19,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-31 09:22:19,306 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 4 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 09:22:19,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:22:19,372 INFO L93 Difference]: Finished difference Result 86 states and 106 transitions. [2022-01-31 09:22:19,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 09:22:19,373 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 4 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 70 [2022-01-31 09:22:19,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:22:19,374 INFO L225 Difference]: With dead ends: 86 [2022-01-31 09:22:19,374 INFO L226 Difference]: Without dead ends: 86 [2022-01-31 09:22:19,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-31 09:22:19,374 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 37 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:22:19,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 100 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:22:19,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-01-31 09:22:19,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-01-31 09:22:19,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 75 states have (on average 1.2666666666666666) internal successors, (95), 75 states have internal predecessors, (95), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 09:22:19,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 106 transitions. [2022-01-31 09:22:19,380 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 106 transitions. Word has length 70 [2022-01-31 09:22:19,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:22:19,380 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 106 transitions. [2022-01-31 09:22:19,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 4 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 09:22:19,380 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 106 transitions. [2022-01-31 09:22:19,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 09:22:19,382 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:22:19,382 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:22:19,413 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 09:22:19,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:22:19,599 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:22:19,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:22:19,599 INFO L85 PathProgramCache]: Analyzing trace with hash 265270041, now seen corresponding path program 1 times [2022-01-31 09:22:19,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:22:19,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123298690] [2022-01-31 09:22:19,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:22:19,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:22:19,619 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:22:19,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1196227957] [2022-01-31 09:22:19,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:22:19,619 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:22:19,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:22:19,635 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 09:22:19,636 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 09:22:19,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:22:19,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-31 09:22:19,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:22:19,996 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 09:22:19,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:22:20,234 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 2 proven. 235 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 09:22:20,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:22:20,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123298690] [2022-01-31 09:22:20,234 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:22:20,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196227957] [2022-01-31 09:22:20,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196227957] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:22:20,234 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 09:22:20,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-01-31 09:22:20,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990736511] [2022-01-31 09:22:20,235 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 09:22:20,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 09:22:20,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:22:20,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 09:22:20,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2022-01-31 09:22:20,236 INFO L87 Difference]: Start difference. First operand 86 states and 106 transitions. Second operand has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-31 09:22:20,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:22:20,769 INFO L93 Difference]: Finished difference Result 393 states and 553 transitions. [2022-01-31 09:22:20,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 09:22:20,769 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 78 [2022-01-31 09:22:20,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:22:20,771 INFO L225 Difference]: With dead ends: 393 [2022-01-31 09:22:20,771 INFO L226 Difference]: Without dead ends: 393 [2022-01-31 09:22:20,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 09:22:20,772 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 674 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 685 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 09:22:20,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [685 Valid, 167 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 09:22:20,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-01-31 09:22:20,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 146. [2022-01-31 09:22:20,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 135 states have (on average 1.2814814814814814) internal successors, (173), 135 states have internal predecessors, (173), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 09:22:20,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 184 transitions. [2022-01-31 09:22:20,788 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 184 transitions. Word has length 78 [2022-01-31 09:22:20,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:22:20,788 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 184 transitions. [2022-01-31 09:22:20,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-31 09:22:20,788 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 184 transitions. [2022-01-31 09:22:20,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-01-31 09:22:20,789 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:22:20,789 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 11, 11, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:22:20,810 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 09:22:21,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:22:21,008 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:22:21,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:22:21,009 INFO L85 PathProgramCache]: Analyzing trace with hash 195391865, now seen corresponding path program 2 times [2022-01-31 09:22:21,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:22:21,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138574715] [2022-01-31 09:22:21,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:22:21,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:22:21,035 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:22:21,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1806153609] [2022-01-31 09:22:21,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 09:22:21,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:22:21,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:22:21,052 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 09:22:21,053 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 09:22:21,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 09:22:21,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:22:21,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-31 09:22:21,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:22:21,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1182 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 09:22:21,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:22:22,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1182 backedges. 2 proven. 1177 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 09:22:22,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:22:22,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138574715] [2022-01-31 09:22:22,548 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:22:22,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806153609] [2022-01-31 09:22:22,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806153609] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:22:22,548 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 09:22:22,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-01-31 09:22:22,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497260183] [2022-01-31 09:22:22,548 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 09:22:22,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 09:22:22,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:22:22,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 09:22:22,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1179, Invalid=1271, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 09:22:22,551 INFO L87 Difference]: Start difference. First operand 146 states and 184 transitions. Second operand has 50 states, 50 states have (on average 4.96) internal successors, (248), 50 states have internal predecessors, (248), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-31 09:22:24,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:22:24,098 INFO L93 Difference]: Finished difference Result 801 states and 1141 transitions. [2022-01-31 09:22:24,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 09:22:24,099 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 4.96) internal successors, (248), 50 states have internal predecessors, (248), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 138 [2022-01-31 09:22:24,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:22:24,102 INFO L225 Difference]: With dead ends: 801 [2022-01-31 09:22:24,102 INFO L226 Difference]: Without dead ends: 801 [2022-01-31 09:22:24,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2329, Invalid=2927, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 09:22:24,104 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 1227 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 465 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1250 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 1016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 465 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 09:22:24,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1250 Valid, 224 Invalid, 1016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [465 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 09:22:24,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2022-01-31 09:22:24,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 266. [2022-01-31 09:22:24,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 255 states have (on average 1.2901960784313726) internal successors, (329), 255 states have internal predecessors, (329), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 09:22:24,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 340 transitions. [2022-01-31 09:22:24,121 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 340 transitions. Word has length 138 [2022-01-31 09:22:24,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:22:24,121 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 340 transitions. [2022-01-31 09:22:24,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.96) internal successors, (248), 50 states have internal predecessors, (248), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-31 09:22:24,121 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 340 transitions. [2022-01-31 09:22:24,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2022-01-31 09:22:24,123 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:22:24,123 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 23, 23, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:22:24,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-31 09:22:24,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:22:24,341 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:22:24,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:22:24,341 INFO L85 PathProgramCache]: Analyzing trace with hash -771955143, now seen corresponding path program 3 times [2022-01-31 09:22:24,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:22:24,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928455333] [2022-01-31 09:22:24,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:22:24,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:22:24,370 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:22:24,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [817376147] [2022-01-31 09:22:24,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 09:22:24,370 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:22:24,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:22:24,380 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 09:22:24,403 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 09:22:24,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-31 09:22:24,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:22:24,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-31 09:22:24,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:22:25,733 INFO L134 CoverageAnalysis]: Checked inductivity of 5226 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5221 trivial. 0 not checked. [2022-01-31 09:22:25,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:22:43,334 INFO L134 CoverageAnalysis]: Checked inductivity of 5226 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 5221 trivial. 0 not checked. [2022-01-31 09:22:43,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:22:43,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928455333] [2022-01-31 09:22:43,334 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:22:43,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817376147] [2022-01-31 09:22:43,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817376147] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:22:43,334 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 09:22:43,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2022-01-31 09:22:43,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738892303] [2022-01-31 09:22:43,335 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 09:22:43,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 09:22:43,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:22:43,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 09:22:43,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=91, Unknown=4, NotChecked=0, Total=132 [2022-01-31 09:22:43,336 INFO L87 Difference]: Start difference. First operand 266 states and 340 transitions. Second operand has 12 states, 10 states have (on average 4.9) internal successors, (49), 11 states have internal predecessors, (49), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-01-31 09:22:45,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:22:45,849 INFO L93 Difference]: Finished difference Result 286 states and 367 transitions. [2022-01-31 09:22:45,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 09:22:45,849 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 4.9) internal successors, (49), 11 states have internal predecessors, (49), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 258 [2022-01-31 09:22:45,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:22:45,851 INFO L225 Difference]: With dead ends: 286 [2022-01-31 09:22:45,851 INFO L226 Difference]: Without dead ends: 286 [2022-01-31 09:22:45,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 521 GetRequests, 505 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=79, Invalid=188, Unknown=5, NotChecked=0, Total=272 [2022-01-31 09:22:45,852 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 129 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 09:22:45,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 144 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 09:22:45,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2022-01-31 09:22:45,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 286. [2022-01-31 09:22:45,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 270 states have (on average 1.288888888888889) internal successors, (348), 270 states have internal predecessors, (348), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 09:22:45,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 367 transitions. [2022-01-31 09:22:45,858 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 367 transitions. Word has length 258 [2022-01-31 09:22:45,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:22:45,858 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 367 transitions. [2022-01-31 09:22:45,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 4.9) internal successors, (49), 11 states have internal predecessors, (49), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-01-31 09:22:45,859 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 367 transitions. [2022-01-31 09:22:45,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2022-01-31 09:22:45,861 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:22:45,861 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 23, 23, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:22:45,883 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-01-31 09:22:46,061 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,SelfDestructingSolverStorable7 [2022-01-31 09:22:46,062 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:22:46,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:22:46,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1258893387, now seen corresponding path program 4 times [2022-01-31 09:22:46,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:22:46,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848543811] [2022-01-31 09:22:46,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:22:46,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:22:46,110 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:22:46,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [953788305] [2022-01-31 09:22:46,110 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 09:22:46,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:22:46,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:22:46,111 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 09:22:46,135 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 09:22:46,297 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 09:22:46,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:22:46,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 737 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 09:22:46,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:22:46,381 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-31 09:22:46,407 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-31 09:22:46,731 INFO L134 CoverageAnalysis]: Checked inductivity of 5326 backedges. 399 proven. 4 refuted. 0 times theorem prover too weak. 4923 trivial. 0 not checked. [2022-01-31 09:22:46,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:22:47,149 INFO L134 CoverageAnalysis]: Checked inductivity of 5326 backedges. 409 proven. 4 refuted. 0 times theorem prover too weak. 4913 trivial. 0 not checked. [2022-01-31 09:22:47,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:22:47,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848543811] [2022-01-31 09:22:47,150 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:22:47,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953788305] [2022-01-31 09:22:47,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953788305] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:22:47,150 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 09:22:47,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-01-31 09:22:47,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141723768] [2022-01-31 09:22:47,150 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 09:22:47,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 09:22:47,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:22:47,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 09:22:47,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-01-31 09:22:47,151 INFO L87 Difference]: Start difference. First operand 286 states and 367 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 09:22:47,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:22:47,341 INFO L93 Difference]: Finished difference Result 334 states and 435 transitions. [2022-01-31 09:22:47,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 09:22:47,341 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 290 [2022-01-31 09:22:47,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:22:47,343 INFO L225 Difference]: With dead ends: 334 [2022-01-31 09:22:47,343 INFO L226 Difference]: Without dead ends: 334 [2022-01-31 09:22:47,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 587 GetRequests, 571 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2022-01-31 09:22:47,345 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 36 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:22:47,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 156 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:22:47,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2022-01-31 09:22:47,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 286. [2022-01-31 09:22:47,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 270 states have (on average 1.2740740740740741) internal successors, (344), 270 states have internal predecessors, (344), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 09:22:47,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 363 transitions. [2022-01-31 09:22:47,358 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 363 transitions. Word has length 290 [2022-01-31 09:22:47,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:22:47,358 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 363 transitions. [2022-01-31 09:22:47,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 09:22:47,358 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 363 transitions. [2022-01-31 09:22:47,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2022-01-31 09:22:47,363 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:22:47,363 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 42, 23, 23, 6, 6, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:22:47,386 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 09:22:47,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:22:47,588 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:22:47,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:22:47,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1720983947, now seen corresponding path program 1 times [2022-01-31 09:22:47,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:22:47,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360669020] [2022-01-31 09:22:47,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:22:47,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:22:47,621 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:22:47,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2125973062] [2022-01-31 09:22:47,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:22:47,622 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:22:47,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:22:47,623 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 09:22:47,628 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 09:22:47,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:22:47,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-31 09:22:47,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:22:49,908 INFO L134 CoverageAnalysis]: Checked inductivity of 5326 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-01-31 09:22:49,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:22:53,784 INFO L134 CoverageAnalysis]: Checked inductivity of 5326 backedges. 10 proven. 5221 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-01-31 09:22:53,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:22:53,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360669020] [2022-01-31 09:22:53,785 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:22:53,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125973062] [2022-01-31 09:22:53,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125973062] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:22:53,785 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 09:22:53,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 98 [2022-01-31 09:22:53,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5265588] [2022-01-31 09:22:53,785 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 09:22:53,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-01-31 09:22:53,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:22:53,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-01-31 09:22:53,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4659, Invalid=4847, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 09:22:53,791 INFO L87 Difference]: Start difference. First operand 286 states and 363 transitions. Second operand has 98 states, 98 states have (on average 4.979591836734694) internal successors, (488), 98 states have internal predecessors, (488), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-31 09:23:03,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:23:03,438 INFO L93 Difference]: Finished difference Result 3065 states and 4480 transitions. [2022-01-31 09:23:03,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-31 09:23:03,439 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 4.979591836734694) internal successors, (488), 98 states have internal predecessors, (488), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 290 [2022-01-31 09:23:03,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:23:03,448 INFO L225 Difference]: With dead ends: 3065 [2022-01-31 09:23:03,448 INFO L226 Difference]: Without dead ends: 3065 [2022-01-31 09:23:03,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 626 GetRequests, 483 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4465 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=9265, Invalid=11615, Unknown=0, NotChecked=0, Total=20880 [2022-01-31 09:23:03,452 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 4228 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 1056 mSolverCounterSat, 1532 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4275 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 2588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1532 IncrementalHoareTripleChecker+Valid, 1056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-01-31 09:23:03,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4275 Valid, 423 Invalid, 2588 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1532 Valid, 1056 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-01-31 09:23:03,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3065 states. [2022-01-31 09:23:03,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3065 to 526. [2022-01-31 09:23:03,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 510 states have (on average 1.2862745098039217) internal successors, (656), 510 states have internal predecessors, (656), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 09:23:03,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 675 transitions. [2022-01-31 09:23:03,513 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 675 transitions. Word has length 290 [2022-01-31 09:23:03,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:23:03,514 INFO L470 AbstractCegarLoop]: Abstraction has 526 states and 675 transitions. [2022-01-31 09:23:03,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 4.979591836734694) internal successors, (488), 98 states have internal predecessors, (488), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-31 09:23:03,514 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 675 transitions. [2022-01-31 09:23:03,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2022-01-31 09:23:03,519 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:23:03,520 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 94, 90, 47, 47, 6, 6, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:23:03,563 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 09:23:03,735 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,SelfDestructingSolverStorable9 [2022-01-31 09:23:03,736 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:23:03,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:23:03,737 INFO L85 PathProgramCache]: Analyzing trace with hash -648402955, now seen corresponding path program 2 times [2022-01-31 09:23:03,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:23:03,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738403116] [2022-01-31 09:23:03,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:23:03,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:23:03,785 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:23:03,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1139873791] [2022-01-31 09:23:03,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 09:23:03,785 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:23:03,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:23:03,786 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 09:23:03,787 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 09:23:04,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 09:23:04,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:23:04,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 1730 conjuncts, 97 conjunts are in the unsatisfiable core [2022-01-31 09:23:04,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:23:09,196 INFO L134 CoverageAnalysis]: Checked inductivity of 22054 backedges. 0 proven. 21949 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-01-31 09:23:09,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:23:37,275 INFO L134 CoverageAnalysis]: Checked inductivity of 22054 backedges. 10 proven. 21949 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-01-31 09:23:37,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:23:37,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738403116] [2022-01-31 09:23:37,276 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:23:37,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139873791] [2022-01-31 09:23:37,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139873791] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:23:37,276 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 09:23:37,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 194 [2022-01-31 09:23:37,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703246969] [2022-01-31 09:23:37,276 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 09:23:37,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 194 states [2022-01-31 09:23:37,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:23:37,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2022-01-31 09:23:37,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18531, Invalid=18911, Unknown=0, NotChecked=0, Total=37442 [2022-01-31 09:23:37,290 INFO L87 Difference]: Start difference. First operand 526 states and 675 transitions. Second operand has 194 states, 194 states have (on average 4.989690721649485) internal successors, (968), 194 states have internal predecessors, (968), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-31 09:26:59,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:26:59,356 INFO L93 Difference]: Finished difference Result 6233 states and 9136 transitions. [2022-01-31 09:26:59,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2022-01-31 09:26:59,362 INFO L78 Accepts]: Start accepts. Automaton has has 194 states, 194 states have (on average 4.989690721649485) internal successors, (968), 194 states have internal predecessors, (968), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 530 [2022-01-31 09:26:59,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:26:59,383 INFO L225 Difference]: With dead ends: 6233 [2022-01-31 09:26:59,383 INFO L226 Difference]: Without dead ends: 6233 [2022-01-31 09:26:59,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1154 GetRequests, 867 SyntacticMatches, 0 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18145 ImplicationChecksByTransitivity, 199.7s TimeCoverageRelationStatistics Valid=36961, Invalid=46271, Unknown=0, NotChecked=0, Total=83232 [2022-01-31 09:26:59,389 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 7415 mSDsluCounter, 814 mSDsCounter, 0 mSdLazyCounter, 2620 mSolverCounterSat, 2884 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7510 SdHoareTripleChecker+Valid, 836 SdHoareTripleChecker+Invalid, 5504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2884 IncrementalHoareTripleChecker+Valid, 2620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.8s IncrementalHoareTripleChecker+Time [2022-01-31 09:26:59,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7510 Valid, 836 Invalid, 5504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2884 Valid, 2620 Invalid, 0 Unknown, 0 Unchecked, 14.8s Time] [2022-01-31 09:26:59,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6233 states. [2022-01-31 09:26:59,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6233 to 1006. [2022-01-31 09:26:59,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1006 states, 990 states have (on average 1.292929292929293) internal successors, (1280), 990 states have internal predecessors, (1280), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 09:26:59,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 1299 transitions. [2022-01-31 09:26:59,535 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 1299 transitions. Word has length 530 [2022-01-31 09:26:59,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:26:59,535 INFO L470 AbstractCegarLoop]: Abstraction has 1006 states and 1299 transitions. [2022-01-31 09:26:59,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 194 states, 194 states have (on average 4.989690721649485) internal successors, (968), 194 states have internal predecessors, (968), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-31 09:26:59,536 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 1299 transitions. [2022-01-31 09:26:59,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1011 [2022-01-31 09:26:59,543 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:26:59,543 INFO L514 BasicCegarLoop]: trace histogram [190, 190, 190, 186, 95, 95, 6, 6, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:26:59,558 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 09:26:59,747 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,SelfDestructingSolverStorable10 [2022-01-31 09:26:59,748 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:26:59,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:26:59,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1117141749, now seen corresponding path program 3 times [2022-01-31 09:26:59,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:26:59,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919682525] [2022-01-31 09:26:59,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:26:59,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:26:59,844 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:26:59,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1911548967] [2022-01-31 09:26:59,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 09:26:59,845 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:26:59,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:26:59,846 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 09:26:59,847 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 09:27:00,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-31 09:27:00,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:27:00,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-31 09:27:00,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:27:03,226 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-31 09:27:03,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2022-01-31 09:27:56,193 INFO L134 CoverageAnalysis]: Checked inductivity of 90070 backedges. 0 proven. 1695 refuted. 4 times theorem prover too weak. 88371 trivial. 0 not checked. [2022-01-31 09:27:56,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:29:43,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:29:43,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919682525] [2022-01-31 09:29:43,961 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:29:43,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911548967] [2022-01-31 09:29:43,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911548967] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:29:43,961 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-31 09:29:43,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-01-31 09:29:43,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101528482] [2022-01-31 09:29:43,961 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-31 09:29:43,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 09:29:43,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:29:43,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 09:29:43,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=189, Unknown=20, NotChecked=0, Total=272 [2022-01-31 09:29:43,962 INFO L87 Difference]: Start difference. First operand 1006 states and 1299 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 09:29:45,965 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-31 09:29:48,166 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 09:29:50,361 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 09:29:52,557 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.20s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 09:29:54,751 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 09:29:56,950 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 09:29:59,155 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-31 09:30:01,347 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 09:30:03,598 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 09:30:05,804 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 09:30:08,015 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.21s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 09:30:10,209 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 09:30:12,413 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 09:30:15,015 WARN L860 $PredicateComparison]: unable to prove that (and (= (mod (mod (mod (+ c_main_~i~0 4294967295) 4294967296) 3) 4294967296) 0) (= (mod (mod (mod c_main_~i~0 4294967296) 3) 4294967296) 0) (< c_main_~i~0 c_~N~0) (= c_~N~0 1000) (= 3 c_main_~R~0)) is different from true [2022-01-31 09:30:17,226 WARN L860 $PredicateComparison]: unable to prove that (and (= (mod (mod (mod (+ c_main_~i~0 4294967295) 4294967296) 3) 4294967296) 0) (< c_main_~i~0 c_~N~0) (= c_~N~0 1000) (= 3 c_main_~R~0)) is different from true [2022-01-31 09:30:19,238 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-31 09:30:21,431 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 09:30:23,638 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.21s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 09:30:25,851 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-31 09:30:28,073 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 09:30:30,285 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 09:30:32,493 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-01-31 09:30:36,973 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-31 09:30:46,083 WARN L860 $PredicateComparison]: unable to prove that (and (= (mod (mod (mod c_main_~i~0 4294967296) 3) 4294967296) 0) (= c_~N~0 1000) (= 3 c_main_~R~0)) is different from true [2022-01-31 09:30:48,085 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 09:30:50,279 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 09:31:03,796 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-31 09:31:15,320 WARN L228 SmtUtils]: Spent 9.06s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 09:31:17,553 WARN L838 $PredicateComparison]: unable to prove that (and (= (mod (mod (mod (+ c_main_~i~0 4294967295) 4294967296) 3) 4294967296) 0) (= |c_main_#t~mem6| (mod (mod (mod c_main_~i~0 4294967296) 3) 4294967296)) (< c_main_~i~0 c_~N~0) (= c_~N~0 1000) (= 3 c_main_~R~0)) is different from false [2022-01-31 09:31:19,818 WARN L860 $PredicateComparison]: unable to prove that (and (= (mod (mod (mod (+ c_main_~i~0 4294967295) 4294967296) 3) 4294967296) 0) (= |c_main_#t~mem6| (mod (mod (mod c_main_~i~0 4294967296) 3) 4294967296)) (< c_main_~i~0 c_~N~0) (= c_~N~0 1000) (= 3 c_main_~R~0)) is different from true [2022-01-31 09:31:32,961 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 09:31:35,302 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 09:31:35,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:31:35,608 INFO L93 Difference]: Finished difference Result 1858 states and 2435 transitions. [2022-01-31 09:31:35,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 09:31:35,615 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 1010 [2022-01-31 09:31:35,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:31:35,623 INFO L225 Difference]: With dead ends: 1858 [2022-01-31 09:31:35,623 INFO L226 Difference]: Without dead ends: 1858 [2022-01-31 09:31:35,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2023 GetRequests, 1999 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 101.8s TimeCoverageRelationStatistics Valid=128, Invalid=315, Unknown=35, NotChecked=172, Total=650 [2022-01-31 09:31:35,624 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 8 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 7 mSolverCounterUnsat, 26 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 52.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 26 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 57.0s IncrementalHoareTripleChecker+Time [2022-01-31 09:31:35,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 76 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 48 Invalid, 26 Unknown, 31 Unchecked, 57.0s Time] [2022-01-31 09:31:35,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2022-01-31 09:31:35,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 1017. [2022-01-31 09:31:35,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1017 states, 1001 states have (on average 1.2947052947052946) internal successors, (1296), 1001 states have internal predecessors, (1296), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 09:31:35,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1017 states to 1017 states and 1315 transitions. [2022-01-31 09:31:35,663 INFO L78 Accepts]: Start accepts. Automaton has 1017 states and 1315 transitions. Word has length 1010 [2022-01-31 09:31:35,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:31:35,664 INFO L470 AbstractCegarLoop]: Abstraction has 1017 states and 1315 transitions. [2022-01-31 09:31:35,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 09:31:35,665 INFO L276 IsEmpty]: Start isEmpty. Operand 1017 states and 1315 transitions. [2022-01-31 09:31:35,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1011 [2022-01-31 09:31:35,672 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:31:35,672 INFO L514 BasicCegarLoop]: trace histogram [190, 190, 190, 185, 95, 95, 6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:31:35,680 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 09:31:35,881 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,SelfDestructingSolverStorable11 [2022-01-31 09:31:35,881 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:31:35,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:31:35,882 INFO L85 PathProgramCache]: Analyzing trace with hash 876601620, now seen corresponding path program 4 times [2022-01-31 09:31:35,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:31:35,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742100276] [2022-01-31 09:31:35,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:31:35,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:31:35,979 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:31:35,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1352618452] [2022-01-31 09:31:35,979 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 09:31:35,979 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:31:35,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:31:35,994 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 09:31:35,995 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 09:31:36,607 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 09:31:36,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:31:36,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 2666 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-31 09:31:36,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:31:36,788 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-31 09:31:36,816 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2022-01-31 09:31:38,231 INFO L134 CoverageAnalysis]: Checked inductivity of 90070 backedges. 4491 proven. 4 refuted. 0 times theorem prover too weak. 85575 trivial. 0 not checked. [2022-01-31 09:31:38,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:31:40,035 INFO L134 CoverageAnalysis]: Checked inductivity of 90070 backedges. 4493 proven. 12 refuted. 0 times theorem prover too weak. 85565 trivial. 0 not checked. [2022-01-31 09:31:40,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:31:40,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742100276] [2022-01-31 09:31:40,036 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:31:40,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352618452] [2022-01-31 09:31:40,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352618452] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:31:40,036 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 09:31:40,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2022-01-31 09:31:40,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456836444] [2022-01-31 09:31:40,036 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 09:31:40,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 09:31:40,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:31:40,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 09:31:40,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-01-31 09:31:40,048 INFO L87 Difference]: Start difference. First operand 1017 states and 1315 transitions. Second operand has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 09:31:40,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:31:40,850 INFO L93 Difference]: Finished difference Result 1346 states and 1575 transitions. [2022-01-31 09:31:40,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 09:31:40,856 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 1010 [2022-01-31 09:31:40,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:31:40,858 INFO L225 Difference]: With dead ends: 1346 [2022-01-31 09:31:40,858 INFO L226 Difference]: Without dead ends: 1346 [2022-01-31 09:31:40,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2028 GetRequests, 2005 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=203, Invalid=349, Unknown=0, NotChecked=0, Total=552 [2022-01-31 09:31:40,859 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 25 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 09:31:40,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 200 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 09:31:40,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1346 states. [2022-01-31 09:31:40,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1346 to 1203. [2022-01-31 09:31:40,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1203 states, 1187 states have (on average 1.1701769165964617) internal successors, (1389), 1187 states have internal predecessors, (1389), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 09:31:40,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1203 states to 1203 states and 1408 transitions. [2022-01-31 09:31:40,874 INFO L78 Accepts]: Start accepts. Automaton has 1203 states and 1408 transitions. Word has length 1010 [2022-01-31 09:31:40,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:31:40,874 INFO L470 AbstractCegarLoop]: Abstraction has 1203 states and 1408 transitions. [2022-01-31 09:31:40,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 09:31:40,874 INFO L276 IsEmpty]: Start isEmpty. Operand 1203 states and 1408 transitions. [2022-01-31 09:31:40,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1011 [2022-01-31 09:31:40,881 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:31:40,881 INFO L514 BasicCegarLoop]: trace histogram [190, 190, 190, 96, 95, 95, 94, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:31:40,911 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 09:31:41,099 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,SelfDestructingSolverStorable12 [2022-01-31 09:31:41,099 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:31:41,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:31:41,100 INFO L85 PathProgramCache]: Analyzing trace with hash 868468597, now seen corresponding path program 5 times [2022-01-31 09:31:41,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:31:41,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872034422] [2022-01-31 09:31:41,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:31:41,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:31:41,170 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:31:41,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1752735668] [2022-01-31 09:31:41,170 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 09:31:41,170 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:31:41,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:31:41,171 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 09:31:41,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process