/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 05:42:33,844 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 05:42:33,846 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 05:42:33,882 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 05:42:33,883 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 05:42:33,884 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 05:42:33,887 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 05:42:33,890 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 05:42:33,892 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 05:42:33,897 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 05:42:33,898 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 05:42:33,899 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 05:42:33,900 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 05:42:33,902 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 05:42:33,903 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 05:42:33,905 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 05:42:33,906 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 05:42:33,906 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 05:42:33,908 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 05:42:33,913 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 05:42:33,915 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 05:42:33,916 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 05:42:33,916 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 05:42:33,917 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 05:42:33,918 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 05:42:33,921 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 05:42:33,928 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 05:42:33,929 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 05:42:33,930 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 05:42:33,931 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-20 05:42:33,942 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 05:42:33,942 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 05:42:33,944 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 05:42:33,945 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 05:42:33,945 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 05:42:33,945 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 05:42:33,945 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 05:42:33,945 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 05:42:33,945 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 05:42:33,946 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 05:42:33,946 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 05:42:33,947 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 05:42:33,947 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 05:42:33,947 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 05:42:33,947 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 05:42:33,947 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 05:42:33,947 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 05:42:33,948 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 05:42:33,948 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 05:42:33,948 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 05:42:33,948 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 05:42:33,949 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 05:42:33,949 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 05:42:34,214 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 05:42:34,241 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 05:42:34,243 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 05:42:34,244 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 05:42:34,245 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 05:42:34,246 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound100.c [2022-03-20 05:42:34,303 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea2ed7c26/6d3430b7e18a49b6a6507542e948dcae/FLAGd025f49a9 [2022-03-20 05:42:34,733 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 05:42:34,733 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound100.c [2022-03-20 05:42:34,740 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea2ed7c26/6d3430b7e18a49b6a6507542e948dcae/FLAGd025f49a9 [2022-03-20 05:42:34,754 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea2ed7c26/6d3430b7e18a49b6a6507542e948dcae [2022-03-20 05:42:34,757 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 05:42:34,758 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 05:42:34,763 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 05:42:34,763 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 05:42:34,767 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 05:42:34,767 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 05:42:34" (1/1) ... [2022-03-20 05:42:34,768 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28594ede and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:42:34, skipping insertion in model container [2022-03-20 05:42:34,768 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 05:42:34" (1/1) ... [2022-03-20 05:42:34,774 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 05:42:34,788 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 05:42:34,974 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound100.c[490,503] [2022-03-20 05:42:35,004 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 05:42:35,010 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 05:42:35,027 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound100.c[490,503] [2022-03-20 05:42:35,048 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 05:42:35,064 INFO L208 MainTranslator]: Completed translation [2022-03-20 05:42:35,065 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:42:35 WrapperNode [2022-03-20 05:42:35,065 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 05:42:35,067 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 05:42:35,067 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 05:42:35,067 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 05:42:35,077 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:42:35" (1/1) ... [2022-03-20 05:42:35,077 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:42:35" (1/1) ... [2022-03-20 05:42:35,089 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:42:35" (1/1) ... [2022-03-20 05:42:35,090 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:42:35" (1/1) ... [2022-03-20 05:42:35,097 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:42:35" (1/1) ... [2022-03-20 05:42:35,101 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:42:35" (1/1) ... [2022-03-20 05:42:35,101 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:42:35" (1/1) ... [2022-03-20 05:42:35,103 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 05:42:35,104 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 05:42:35,104 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 05:42:35,104 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 05:42:35,109 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:42:35" (1/1) ... [2022-03-20 05:42:35,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 05:42:35,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:42:35,136 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 05:42:35,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 05:42:35,187 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 05:42:35,188 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 05:42:35,188 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 05:42:35,188 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 05:42:35,189 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 05:42:35,189 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 05:42:35,189 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 05:42:35,189 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 05:42:35,189 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 05:42:35,189 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 05:42:35,189 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 05:42:35,190 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 05:42:35,190 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 05:42:35,190 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 05:42:35,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 05:42:35,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 05:42:35,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 05:42:35,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 05:42:35,193 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 05:42:35,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 05:42:35,257 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 05:42:35,258 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 05:42:35,450 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 05:42:35,456 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 05:42:35,456 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-20 05:42:35,458 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 05:42:35 BoogieIcfgContainer [2022-03-20 05:42:35,458 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 05:42:35,459 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 05:42:35,459 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 05:42:35,464 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 05:42:35,467 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 05:42:35" (1/1) ... [2022-03-20 05:42:35,468 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-03-20 05:42:35,489 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 05:42:35 BasicIcfg [2022-03-20 05:42:35,489 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 05:42:35,496 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 05:42:35,496 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 05:42:35,498 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 05:42:35,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 05:42:34" (1/4) ... [2022-03-20 05:42:35,499 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71758553 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 05:42:35, skipping insertion in model container [2022-03-20 05:42:35,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:42:35" (2/4) ... [2022-03-20 05:42:35,500 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71758553 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 05:42:35, skipping insertion in model container [2022-03-20 05:42:35,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 05:42:35" (3/4) ... [2022-03-20 05:42:35,500 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71758553 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 05:42:35, skipping insertion in model container [2022-03-20 05:42:35,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 05:42:35" (4/4) ... [2022-03-20 05:42:35,501 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound100.cJordan [2022-03-20 05:42:35,505 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-20 05:42:35,505 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 05:42:35,545 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 05:42:35,552 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 05:42:35,553 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 05:42:35,571 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-20 05:42:35,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-20 05:42:35,578 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:42:35,579 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2022-03-20 05:42:35,579 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:42:35,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:42:35,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1630657446, now seen corresponding path program 1 times [2022-03-20 05:42:35,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:42:35,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473511013] [2022-03-20 05:42:35,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:42:35,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:42:35,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:42:35,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 05:42:35,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:42:35,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 05:42:35,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:42:35,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 05:42:35,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:42:35,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 05:42:35,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:42:35,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-20 05:42:35,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:42:35,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-20 05:42:35,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:42:35,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-20 05:42:35,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:42:35,841 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-20 05:42:35,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:42:35,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473511013] [2022-03-20 05:42:35,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473511013] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 05:42:35,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 05:42:35,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 05:42:35,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130148976] [2022-03-20 05:42:35,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 05:42:35,849 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 05:42:35,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:42:35,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 05:42:35,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 05:42:35,878 INFO L87 Difference]: Start difference. First operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 05:42:35,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:42:35,972 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2022-03-20 05:42:35,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 05:42:35,974 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2022-03-20 05:42:35,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:42:35,983 INFO L225 Difference]: With dead ends: 40 [2022-03-20 05:42:35,983 INFO L226 Difference]: Without dead ends: 35 [2022-03-20 05:42:35,984 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 05:42:35,987 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 05:42:35,988 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 42 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 05:42:36,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-20 05:42:36,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-03-20 05:42:36,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 05:42:36,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2022-03-20 05:42:36,018 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 43 [2022-03-20 05:42:36,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:42:36,018 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2022-03-20 05:42:36,018 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 05:42:36,019 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2022-03-20 05:42:36,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-20 05:42:36,020 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:42:36,020 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 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, 1] [2022-03-20 05:42:36,021 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 05:42:36,021 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:42:36,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:42:36,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1790145708, now seen corresponding path program 1 times [2022-03-20 05:42:36,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:42:36,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506354371] [2022-03-20 05:42:36,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:42:36,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:42:36,040 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:42:36,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [447454962] [2022-03-20 05:42:36,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:42:36,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:42:36,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:42:36,042 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 05:42:36,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 05:42:36,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:42:36,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 05:42:36,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:42:36,364 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-20 05:42:36,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:42:36,559 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-20 05:42:36,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:42:36,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506354371] [2022-03-20 05:42:36,560 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:42:36,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447454962] [2022-03-20 05:42:36,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447454962] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 05:42:36,565 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 05:42:36,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-03-20 05:42:36,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584361970] [2022-03-20 05:42:36,568 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 05:42:36,572 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 05:42:36,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:42:36,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 05:42:36,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-20 05:42:36,576 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 05:42:36,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:42:36,691 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2022-03-20 05:42:36,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 05:42:36,691 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44 [2022-03-20 05:42:36,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:42:36,692 INFO L225 Difference]: With dead ends: 44 [2022-03-20 05:42:36,692 INFO L226 Difference]: Without dead ends: 44 [2022-03-20 05:42:36,693 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-03-20 05:42:36,694 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 21 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 05:42:36,694 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 124 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 05:42:36,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-20 05:42:36,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-03-20 05:42:36,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 05:42:36,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2022-03-20 05:42:36,702 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 44 [2022-03-20 05:42:36,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:42:36,702 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2022-03-20 05:42:36,703 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 05:42:36,703 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2022-03-20 05:42:36,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-20 05:42:36,704 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:42:36,704 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 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, 1, 1] [2022-03-20 05:42:36,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 05:42:36,927 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:42:36,928 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:42:36,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:42:36,929 INFO L85 PathProgramCache]: Analyzing trace with hash 375385207, now seen corresponding path program 1 times [2022-03-20 05:42:36,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:42:36,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425643485] [2022-03-20 05:42:36,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:42:36,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:42:36,944 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:42:36,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [120176501] [2022-03-20 05:42:36,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:42:36,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:42:36,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:42:36,946 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 05:42:36,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 05:42:36,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:42:36,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 05:42:37,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:42:37,128 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-20 05:42:37,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:42:37,240 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-20 05:42:37,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:42:37,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425643485] [2022-03-20 05:42:37,241 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:42:37,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120176501] [2022-03-20 05:42:37,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120176501] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 05:42:37,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 05:42:37,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-03-20 05:42:37,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008891827] [2022-03-20 05:42:37,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 05:42:37,242 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 05:42:37,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:42:37,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 05:42:37,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-03-20 05:42:37,243 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-20 05:42:37,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:42:37,278 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2022-03-20 05:42:37,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 05:42:37,279 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 45 [2022-03-20 05:42:37,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:42:37,280 INFO L225 Difference]: With dead ends: 41 [2022-03-20 05:42:37,280 INFO L226 Difference]: Without dead ends: 41 [2022-03-20 05:42:37,280 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-20 05:42:37,281 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 05:42:37,282 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 146 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 05:42:37,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-20 05:42:37,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-03-20 05:42:37,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 05:42:37,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2022-03-20 05:42:37,288 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 45 [2022-03-20 05:42:37,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:42:37,288 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2022-03-20 05:42:37,288 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-20 05:42:37,289 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2022-03-20 05:42:37,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-20 05:42:37,290 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:42:37,290 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:42:37,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 05:42:37,502 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-20 05:42:37,503 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:42:37,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:42:37,504 INFO L85 PathProgramCache]: Analyzing trace with hash -788787523, now seen corresponding path program 1 times [2022-03-20 05:42:37,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:42:37,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008827344] [2022-03-20 05:42:37,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:42:37,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:42:37,523 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:42:37,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [363291961] [2022-03-20 05:42:37,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:42:37,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:42:37,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:42:37,525 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 05:42:37,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 05:42:37,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:42:37,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 05:42:37,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:42:37,813 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-20 05:42:37,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:42:37,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:42:37,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008827344] [2022-03-20 05:42:37,918 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:42:37,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363291961] [2022-03-20 05:42:37,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363291961] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 05:42:37,919 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 05:42:37,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-03-20 05:42:37,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194105570] [2022-03-20 05:42:37,919 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 05:42:37,920 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 05:42:37,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:42:37,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 05:42:37,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-03-20 05:42:37,922 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-20 05:42:38,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:42:38,086 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2022-03-20 05:42:38,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 05:42:38,086 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 50 [2022-03-20 05:42:38,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:42:38,091 INFO L225 Difference]: With dead ends: 52 [2022-03-20 05:42:38,092 INFO L226 Difference]: Without dead ends: 52 [2022-03-20 05:42:38,094 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-03-20 05:42:38,098 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 26 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 05:42:38,099 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 194 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 05:42:38,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-20 05:42:38,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2022-03-20 05:42:38,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 28 states have internal predecessors, (31), 18 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 05:42:38,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2022-03-20 05:42:38,112 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 50 [2022-03-20 05:42:38,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:42:38,112 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2022-03-20 05:42:38,113 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-20 05:42:38,113 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2022-03-20 05:42:38,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-20 05:42:38,138 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:42:38,138 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:42:38,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 05:42:38,339 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:42:38,339 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:42:38,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:42:38,340 INFO L85 PathProgramCache]: Analyzing trace with hash -735644649, now seen corresponding path program 1 times [2022-03-20 05:42:38,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:42:38,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816706530] [2022-03-20 05:42:38,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:42:38,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:42:38,353 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:42:38,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [797255138] [2022-03-20 05:42:38,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:42:38,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:42:38,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:42:38,356 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 05:42:38,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 05:42:38,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:42:38,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 05:42:38,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:42:38,661 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 05:42:38,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:42:38,817 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-20 05:42:38,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:42:38,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816706530] [2022-03-20 05:42:38,818 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:42:38,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797255138] [2022-03-20 05:42:38,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797255138] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 05:42:38,818 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 05:42:38,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-03-20 05:42:38,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483351386] [2022-03-20 05:42:38,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 05:42:38,819 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 05:42:38,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:42:38,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 05:42:38,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-20 05:42:38,820 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 05:42:38,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:42:38,870 INFO L93 Difference]: Finished difference Result 56 states and 69 transitions. [2022-03-20 05:42:38,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 05:42:38,871 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 55 [2022-03-20 05:42:38,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:42:38,872 INFO L225 Difference]: With dead ends: 56 [2022-03-20 05:42:38,872 INFO L226 Difference]: Without dead ends: 56 [2022-03-20 05:42:38,872 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-20 05:42:38,873 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 7 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 05:42:38,873 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 163 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 05:42:38,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-20 05:42:38,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2022-03-20 05:42:38,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 31 states have internal predecessors, (34), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 05:42:38,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2022-03-20 05:42:38,884 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 55 [2022-03-20 05:42:38,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:42:38,885 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2022-03-20 05:42:38,885 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 05:42:38,885 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2022-03-20 05:42:38,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-20 05:42:38,889 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:42:38,889 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:42:38,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 05:42:39,112 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:42:39,112 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:42:39,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:42:39,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1700404515, now seen corresponding path program 1 times [2022-03-20 05:42:39,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:42:39,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357707069] [2022-03-20 05:42:39,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:42:39,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:42:39,123 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:42:39,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1290285753] [2022-03-20 05:42:39,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:42:39,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:42:39,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:42:39,125 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 05:42:39,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 05:42:39,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:42:39,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 05:42:39,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:42:39,403 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-03-20 05:42:39,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:42:39,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:42:39,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357707069] [2022-03-20 05:42:39,493 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:42:39,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290285753] [2022-03-20 05:42:39,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290285753] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 05:42:39,493 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 05:42:39,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-03-20 05:42:39,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524073149] [2022-03-20 05:42:39,494 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 05:42:39,494 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 05:42:39,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:42:39,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 05:42:39,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-20 05:42:39,496 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-03-20 05:42:39,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:42:39,594 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2022-03-20 05:42:39,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 05:42:39,594 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 60 [2022-03-20 05:42:39,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:42:39,595 INFO L225 Difference]: With dead ends: 60 [2022-03-20 05:42:39,595 INFO L226 Difference]: Without dead ends: 60 [2022-03-20 05:42:39,596 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-03-20 05:42:39,596 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 12 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 05:42:39,597 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 154 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 05:42:39,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-20 05:42:39,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2022-03-20 05:42:39,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 33 states have (on average 1.121212121212121) internal successors, (37), 34 states have internal predecessors, (37), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 05:42:39,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2022-03-20 05:42:39,611 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 60 [2022-03-20 05:42:39,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:42:39,612 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2022-03-20 05:42:39,612 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-03-20 05:42:39,612 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2022-03-20 05:42:39,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-20 05:42:39,613 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:42:39,614 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:42:39,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 05:42:39,829 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:42:39,829 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:42:39,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:42:39,830 INFO L85 PathProgramCache]: Analyzing trace with hash 2004479621, now seen corresponding path program 1 times [2022-03-20 05:42:39,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:42:39,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465972056] [2022-03-20 05:42:39,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:42:39,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:42:39,840 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:42:39,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1267080747] [2022-03-20 05:42:39,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:42:39,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:42:39,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:42:39,842 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 05:42:39,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 05:42:39,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:42:39,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 05:42:39,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:42:40,027 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-03-20 05:42:40,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:42:40,172 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-03-20 05:42:40,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:42:40,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465972056] [2022-03-20 05:42:40,173 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:42:40,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267080747] [2022-03-20 05:42:40,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267080747] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 05:42:40,173 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 05:42:40,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-20 05:42:40,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935162112] [2022-03-20 05:42:40,174 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 05:42:40,175 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 05:42:40,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:42:40,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 05:42:40,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-20 05:42:40,176 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 05:42:40,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:42:40,304 INFO L93 Difference]: Finished difference Result 98 states and 137 transitions. [2022-03-20 05:42:40,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 05:42:40,307 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 69 [2022-03-20 05:42:40,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:42:40,308 INFO L225 Difference]: With dead ends: 98 [2022-03-20 05:42:40,308 INFO L226 Difference]: Without dead ends: 98 [2022-03-20 05:42:40,309 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-20 05:42:40,309 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 32 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 05:42:40,310 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 281 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 05:42:40,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-03-20 05:42:40,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 89. [2022-03-20 05:42:40,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 48 states have internal predecessors, (56), 34 states have call successors, (34), 8 states have call predecessors, (34), 7 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-03-20 05:42:40,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 122 transitions. [2022-03-20 05:42:40,318 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 122 transitions. Word has length 69 [2022-03-20 05:42:40,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:42:40,319 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 122 transitions. [2022-03-20 05:42:40,319 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 05:42:40,319 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 122 transitions. [2022-03-20 05:42:40,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-20 05:42:40,320 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:42:40,320 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:42:40,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 05:42:40,543 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:42:40,544 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:42:40,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:42:40,544 INFO L85 PathProgramCache]: Analyzing trace with hash -966489810, now seen corresponding path program 1 times [2022-03-20 05:42:40,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:42:40,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187535335] [2022-03-20 05:42:40,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:42:40,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:42:40,556 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:42:40,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1905702072] [2022-03-20 05:42:40,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:42:40,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:42:40,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:42:40,562 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 05:42:40,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 05:42:40,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:42:40,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-20 05:42:40,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:42:40,813 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-20 05:42:40,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:42:40,997 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-20 05:42:40,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:42:40,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187535335] [2022-03-20 05:42:40,998 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:42:40,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905702072] [2022-03-20 05:42:40,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905702072] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 05:42:40,998 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 05:42:40,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-03-20 05:42:40,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78063135] [2022-03-20 05:42:40,999 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 05:42:40,999 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 05:42:40,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:42:40,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 05:42:41,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-03-20 05:42:41,000 INFO L87 Difference]: Start difference. First operand 89 states and 122 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 6 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-20 05:42:41,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:42:41,216 INFO L93 Difference]: Finished difference Result 130 states and 185 transitions. [2022-03-20 05:42:41,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 05:42:41,217 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 6 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 75 [2022-03-20 05:42:41,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:42:41,220 INFO L225 Difference]: With dead ends: 130 [2022-03-20 05:42:41,220 INFO L226 Difference]: Without dead ends: 128 [2022-03-20 05:42:41,220 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-03-20 05:42:41,221 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 32 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 05:42:41,221 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 329 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 05:42:41,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-03-20 05:42:41,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 96. [2022-03-20 05:42:41,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 53 states have internal predecessors, (60), 36 states have call successors, (36), 9 states have call predecessors, (36), 8 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2022-03-20 05:42:41,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 130 transitions. [2022-03-20 05:42:41,229 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 130 transitions. Word has length 75 [2022-03-20 05:42:41,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:42:41,230 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 130 transitions. [2022-03-20 05:42:41,230 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 6 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-20 05:42:41,230 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 130 transitions. [2022-03-20 05:42:41,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-20 05:42:41,231 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:42:41,231 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:42:41,255 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-20 05:42:41,445 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:42:41,445 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:42:41,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:42:41,446 INFO L85 PathProgramCache]: Analyzing trace with hash -271689658, now seen corresponding path program 2 times [2022-03-20 05:42:41,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:42:41,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358793623] [2022-03-20 05:42:41,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:42:41,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:42:41,456 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:42:41,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1641013880] [2022-03-20 05:42:41,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 05:42:41,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:42:41,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:42:41,458 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 05:42:41,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 05:42:41,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 05:42:41,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 05:42:41,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-20 05:42:41,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:42:42,024 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-03-20 05:42:42,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:42:42,226 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-03-20 05:42:42,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:42:42,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358793623] [2022-03-20 05:42:42,226 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:42:42,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641013880] [2022-03-20 05:42:42,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641013880] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 05:42:42,226 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 05:42:42,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 13 [2022-03-20 05:42:42,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512942121] [2022-03-20 05:42:42,229 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 05:42:42,229 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 05:42:42,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:42:42,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 05:42:42,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-03-20 05:42:42,231 INFO L87 Difference]: Start difference. First operand 96 states and 130 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-03-20 05:42:43,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:42:43,268 INFO L93 Difference]: Finished difference Result 126 states and 167 transitions. [2022-03-20 05:42:43,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 05:42:43,269 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 80 [2022-03-20 05:42:43,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:42:43,270 INFO L225 Difference]: With dead ends: 126 [2022-03-20 05:42:43,270 INFO L226 Difference]: Without dead ends: 126 [2022-03-20 05:42:43,271 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-03-20 05:42:43,271 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 34 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 05:42:43,271 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 330 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 05:42:43,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-03-20 05:42:43,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 108. [2022-03-20 05:42:43,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 60 states have (on average 1.15) internal successors, (69), 62 states have internal predecessors, (69), 36 states have call successors, (36), 12 states have call predecessors, (36), 11 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2022-03-20 05:42:43,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 139 transitions. [2022-03-20 05:42:43,280 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 139 transitions. Word has length 80 [2022-03-20 05:42:43,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:42:43,280 INFO L478 AbstractCegarLoop]: Abstraction has 108 states and 139 transitions. [2022-03-20 05:42:43,280 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-03-20 05:42:43,280 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 139 transitions. [2022-03-20 05:42:43,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-20 05:42:43,281 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:42:43,281 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:42:43,304 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-03-20 05:42:43,495 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-20 05:42:43,496 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:42:43,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:42:43,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1540307954, now seen corresponding path program 3 times [2022-03-20 05:42:43,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:42:43,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531664980] [2022-03-20 05:42:43,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:42:43,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:42:43,507 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:42:43,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [801721132] [2022-03-20 05:42:43,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 05:42:43,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:42:43,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:42:43,513 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 05:42:43,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 05:42:43,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-20 05:42:43,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 05:42:43,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-20 05:42:43,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:42:43,929 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 31 proven. 8 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-03-20 05:42:43,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:42:44,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:42:44,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531664980] [2022-03-20 05:42:44,017 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:42:44,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801721132] [2022-03-20 05:42:44,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801721132] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 05:42:44,017 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 05:42:44,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-03-20 05:42:44,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847743324] [2022-03-20 05:42:44,018 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 05:42:44,018 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 05:42:44,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:42:44,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 05:42:44,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-20 05:42:44,019 INFO L87 Difference]: Start difference. First operand 108 states and 139 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-03-20 05:42:44,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:42:44,226 INFO L93 Difference]: Finished difference Result 142 states and 179 transitions. [2022-03-20 05:42:44,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 05:42:44,227 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 85 [2022-03-20 05:42:44,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:42:44,228 INFO L225 Difference]: With dead ends: 142 [2022-03-20 05:42:44,228 INFO L226 Difference]: Without dead ends: 142 [2022-03-20 05:42:44,228 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-03-20 05:42:44,229 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 20 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 05:42:44,229 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 233 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 05:42:44,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-03-20 05:42:44,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 139. [2022-03-20 05:42:44,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 79 states have (on average 1.139240506329114) internal successors, (90), 81 states have internal predecessors, (90), 44 states have call successors, (44), 16 states have call predecessors, (44), 15 states have return successors, (42), 41 states have call predecessors, (42), 42 states have call successors, (42) [2022-03-20 05:42:44,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 176 transitions. [2022-03-20 05:42:44,236 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 176 transitions. Word has length 85 [2022-03-20 05:42:44,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:42:44,237 INFO L478 AbstractCegarLoop]: Abstraction has 139 states and 176 transitions. [2022-03-20 05:42:44,237 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-03-20 05:42:44,237 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 176 transitions. [2022-03-20 05:42:44,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-20 05:42:44,237 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:42:44,238 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:42:44,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 05:42:44,451 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-20 05:42:44,451 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:42:44,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:42:44,452 INFO L85 PathProgramCache]: Analyzing trace with hash -757951041, now seen corresponding path program 1 times [2022-03-20 05:42:44,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:42:44,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130875807] [2022-03-20 05:42:44,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:42:44,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:42:44,462 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:42:44,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [892093022] [2022-03-20 05:42:44,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:42:44,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:42:44,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:42:44,464 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 05:42:44,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 05:42:44,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:42:44,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-20 05:42:44,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:42:44,959 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-03-20 05:42:44,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:42:45,312 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-03-20 05:42:45,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:42:45,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130875807] [2022-03-20 05:42:45,312 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:42:45,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892093022] [2022-03-20 05:42:45,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892093022] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 05:42:45,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 05:42:45,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-03-20 05:42:45,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204198581] [2022-03-20 05:42:45,313 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 05:42:45,313 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 05:42:45,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:42:45,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 05:42:45,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-03-20 05:42:45,314 INFO L87 Difference]: Start difference. First operand 139 states and 176 transitions. Second operand has 14 states, 12 states have (on average 2.75) internal successors, (33), 13 states have internal predecessors, (33), 9 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-03-20 05:42:47,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:42:47,480 INFO L93 Difference]: Finished difference Result 226 states and 309 transitions. [2022-03-20 05:42:47,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 05:42:47,481 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.75) internal successors, (33), 13 states have internal predecessors, (33), 9 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) Word has length 91 [2022-03-20 05:42:47,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:42:47,483 INFO L225 Difference]: With dead ends: 226 [2022-03-20 05:42:47,483 INFO L226 Difference]: Without dead ends: 220 [2022-03-20 05:42:47,484 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=178, Invalid=692, Unknown=0, NotChecked=0, Total=870 [2022-03-20 05:42:47,484 INFO L913 BasicCegarLoop]: 78 mSDtfsCounter, 58 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-20 05:42:47,484 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 402 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-20 05:42:47,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-03-20 05:42:47,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 216. [2022-03-20 05:42:47,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 116 states have (on average 1.1810344827586208) internal successors, (137), 117 states have internal predecessors, (137), 81 states have call successors, (81), 19 states have call predecessors, (81), 18 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2022-03-20 05:42:47,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 297 transitions. [2022-03-20 05:42:47,496 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 297 transitions. Word has length 91 [2022-03-20 05:42:47,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:42:47,496 INFO L478 AbstractCegarLoop]: Abstraction has 216 states and 297 transitions. [2022-03-20 05:42:47,496 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.75) internal successors, (33), 13 states have internal predecessors, (33), 9 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-03-20 05:42:47,496 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 297 transitions. [2022-03-20 05:42:47,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-03-20 05:42:47,497 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:42:47,497 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:42:47,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 05:42:47,711 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-20 05:42:47,711 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:42:47,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:42:47,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1708635976, now seen corresponding path program 1 times [2022-03-20 05:42:47,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:42:47,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590742231] [2022-03-20 05:42:47,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:42:47,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:42:47,722 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:42:47,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2069648387] [2022-03-20 05:42:47,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:42:47,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:42:47,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:42:47,723 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 05:42:47,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 05:42:47,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:42:47,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-20 05:42:47,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:42:48,479 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 51 proven. 19 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2022-03-20 05:42:48,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:42:48,682 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 05:42:53,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:42:53,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590742231] [2022-03-20 05:42:53,746 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:42:53,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069648387] [2022-03-20 05:42:53,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069648387] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 05:42:53,746 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 05:42:53,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-03-20 05:42:53,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439967174] [2022-03-20 05:42:53,747 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 05:42:53,747 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 05:42:53,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:42:53,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 05:42:53,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=164, Unknown=2, NotChecked=0, Total=210 [2022-03-20 05:42:53,748 INFO L87 Difference]: Start difference. First operand 216 states and 297 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) [2022-03-20 05:42:54,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:42:54,204 INFO L93 Difference]: Finished difference Result 224 states and 304 transitions. [2022-03-20 05:42:54,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 05:42:54,204 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) Word has length 107 [2022-03-20 05:42:54,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:42:54,206 INFO L225 Difference]: With dead ends: 224 [2022-03-20 05:42:54,206 INFO L226 Difference]: Without dead ends: 224 [2022-03-20 05:42:54,206 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=71, Invalid=269, Unknown=2, NotChecked=0, Total=342 [2022-03-20 05:42:54,207 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 26 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 05:42:54,207 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 323 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 05:42:54,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-03-20 05:42:54,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 220. [2022-03-20 05:42:54,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 119 states have (on average 1.1764705882352942) internal successors, (140), 120 states have internal predecessors, (140), 81 states have call successors, (81), 20 states have call predecessors, (81), 19 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2022-03-20 05:42:54,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 300 transitions. [2022-03-20 05:42:54,217 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 300 transitions. Word has length 107 [2022-03-20 05:42:54,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:42:54,218 INFO L478 AbstractCegarLoop]: Abstraction has 220 states and 300 transitions. [2022-03-20 05:42:54,218 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) [2022-03-20 05:42:54,218 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 300 transitions. [2022-03-20 05:42:54,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-20 05:42:54,221 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:42:54,221 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:42:54,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 05:42:54,439 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-20 05:42:54,440 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:42:54,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:42:54,440 INFO L85 PathProgramCache]: Analyzing trace with hash -426906627, now seen corresponding path program 4 times [2022-03-20 05:42:54,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:42:54,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962233591] [2022-03-20 05:42:54,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:42:54,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:42:54,449 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:42:54,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1999430340] [2022-03-20 05:42:54,450 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 05:42:54,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:42:54,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:42:54,451 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 05:42:54,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 05:42:54,497 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 05:42:54,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 05:42:54,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 05:42:54,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:42:54,646 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-03-20 05:42:54,646 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 05:42:54,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:42:54,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962233591] [2022-03-20 05:42:54,646 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:42:54,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999430340] [2022-03-20 05:42:54,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999430340] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 05:42:54,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 05:42:54,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 05:42:54,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560418794] [2022-03-20 05:42:54,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 05:42:54,647 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 05:42:54,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:42:54,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 05:42:54,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 05:42:54,648 INFO L87 Difference]: Start difference. First operand 220 states and 300 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-03-20 05:42:54,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:42:54,697 INFO L93 Difference]: Finished difference Result 201 states and 262 transitions. [2022-03-20 05:42:54,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 05:42:54,697 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 110 [2022-03-20 05:42:54,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:42:54,698 INFO L225 Difference]: With dead ends: 201 [2022-03-20 05:42:54,699 INFO L226 Difference]: Without dead ends: 201 [2022-03-20 05:42:54,699 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-20 05:42:54,699 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 6 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 05:42:54,700 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 183 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 05:42:54,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-03-20 05:42:54,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 154. [2022-03-20 05:42:54,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 84 states have (on average 1.130952380952381) internal successors, (95), 85 states have internal predecessors, (95), 53 states have call successors, (53), 17 states have call predecessors, (53), 16 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2022-03-20 05:42:54,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 199 transitions. [2022-03-20 05:42:54,707 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 199 transitions. Word has length 110 [2022-03-20 05:42:54,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:42:54,707 INFO L478 AbstractCegarLoop]: Abstraction has 154 states and 199 transitions. [2022-03-20 05:42:54,707 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-03-20 05:42:54,708 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 199 transitions. [2022-03-20 05:42:54,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-03-20 05:42:54,709 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:42:54,709 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:42:54,731 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-03-20 05:42:54,923 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-20 05:42:54,923 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:42:54,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:42:54,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1431100670, now seen corresponding path program 2 times [2022-03-20 05:42:54,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:42:54,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657690152] [2022-03-20 05:42:54,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:42:54,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:42:54,933 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:42:54,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2042736457] [2022-03-20 05:42:54,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 05:42:54,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:42:54,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:42:54,935 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 05:42:54,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 05:42:55,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 05:42:55,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 05:42:55,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-20 05:42:55,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:42:56,525 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 142 proven. 88 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2022-03-20 05:42:56,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:42:57,751 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 05:43:01,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:43:01,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657690152] [2022-03-20 05:43:01,426 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:43:01,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042736457] [2022-03-20 05:43:01,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042736457] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 05:43:01,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 05:43:01,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-03-20 05:43:01,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410994719] [2022-03-20 05:43:01,426 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 05:43:01,427 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 05:43:01,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:43:01,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 05:43:01,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2022-03-20 05:43:01,428 INFO L87 Difference]: Start difference. First operand 154 states and 199 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) [2022-03-20 05:43:02,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:43:02,958 INFO L93 Difference]: Finished difference Result 192 states and 248 transitions. [2022-03-20 05:43:02,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 05:43:02,959 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) Word has length 129 [2022-03-20 05:43:02,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:43:02,961 INFO L225 Difference]: With dead ends: 192 [2022-03-20 05:43:02,961 INFO L226 Difference]: Without dead ends: 192 [2022-03-20 05:43:02,961 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 141 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2022-03-20 05:43:02,962 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 37 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 05:43:02,962 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 299 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 05:43:02,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-03-20 05:43:02,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 154. [2022-03-20 05:43:02,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 84 states have (on average 1.130952380952381) internal successors, (95), 85 states have internal predecessors, (95), 53 states have call successors, (53), 17 states have call predecessors, (53), 16 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2022-03-20 05:43:02,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 199 transitions. [2022-03-20 05:43:02,968 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 199 transitions. Word has length 129 [2022-03-20 05:43:02,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:43:02,968 INFO L478 AbstractCegarLoop]: Abstraction has 154 states and 199 transitions. [2022-03-20 05:43:02,968 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) [2022-03-20 05:43:02,968 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 199 transitions. [2022-03-20 05:43:02,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-03-20 05:43:02,969 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:43:02,969 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:43:02,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-20 05:43:03,187 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-20 05:43:03,187 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:43:03,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:43:03,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1491357193, now seen corresponding path program 3 times [2022-03-20 05:43:03,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:43:03,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900087677] [2022-03-20 05:43:03,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:43:03,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:43:03,198 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:43:03,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1780407848] [2022-03-20 05:43:03,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 05:43:03,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:43:03,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:43:03,199 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) [2022-03-20 05:43:03,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 05:43:03,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-20 05:43:03,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 05:43:03,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 69 conjunts are in the unsatisfiable core [2022-03-20 05:43:03,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:43:04,301 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 100 proven. 48 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2022-03-20 05:43:04,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:43:11,708 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse2 (* c_main_~s~0 c_main_~k~0)) (.cse3 (* (- 1) c_main_~q~0 c_main_~k~0))) (let ((.cse5 (+ c_main_~q~0 (* (- 1) c_main_~p~0) (* (- 1) .cse3))) (.cse7 (+ c_main_~s~0 .cse2 (* (- 1) c_main_~r~0)))) (let ((.cse4 (* .cse7 c_main_~y~0)) (.cse6 (* .cse5 c_main_~x~0))) (let ((.cse8 (+ .cse4 .cse6))) (or (not (let ((.cse1 (+ c_main_~p~0 .cse3)) (.cse0 (+ c_main_~r~0 (* (- 1) .cse2)))) (= (+ (* .cse0 c_main_~y~0) (* .cse1 c_main_~x~0) (* c_main_~c~0 c_main_~y~0)) (+ (* c_main_~xy~0 .cse1) c_main_~c~0 (* c_main_~yy~0 .cse0))))) (= (+ .cse4 (* .cse5 c_main_~xy~0) .cse6 (* c_main_~yy~0 .cse7)) (+ (* .cse8 c_main_~y~0) .cse4 .cse6)) (not (= (+ c_main_~b~0 (* (- 1) c_main_~c~0)) .cse8))))))) is different from true [2022-03-20 05:43:32,042 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 100 proven. 30 refuted. 0 times theorem prover too weak. 402 trivial. 18 not checked. [2022-03-20 05:43:32,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:43:32,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900087677] [2022-03-20 05:43:32,042 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:43:32,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780407848] [2022-03-20 05:43:32,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780407848] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 05:43:32,043 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 05:43:32,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2022-03-20 05:43:32,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106875867] [2022-03-20 05:43:32,043 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 05:43:32,044 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 05:43:32,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:43:32,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 05:43:32,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=323, Unknown=3, NotChecked=38, Total=462 [2022-03-20 05:43:32,044 INFO L87 Difference]: Start difference. First operand 154 states and 199 transitions. Second operand has 22 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 12 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (39), 13 states have call predecessors, (39), 11 states have call successors, (39) [2022-03-20 05:43:44,408 WARN L232 SmtUtils]: Spent 6.55s on a formula simplification that was a NOOP. DAG size: 110 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 05:43:46,417 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:43:48,447 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (* c_main_~q~0 c_main_~x~0)) (.cse2 (* c_main_~s~0 c_main_~y~0))) (let ((.cse0 (= (+ .cse1 .cse2 (* c_main_~b~0 c_main_~y~0)) (+ (* c_main_~q~0 c_main_~xy~0) (* c_main_~yy~0 c_main_~s~0) c_main_~b~0)))) (let ((.cse5 (not .cse0)) (.cse4 (* (- 1) c_main_~b~0)) (.cse19 (* (- 1) c_main_~r~0)) (.cse20 (* (- 1) c_main_~p~0))) (and (or .cse0 (not (= c_main_~b~0 (+ .cse1 .cse2)))) (let ((.cse6 (+ (* (- 1) c_main_~q~0) c_main_~p~0)) (.cse9 (+ (* (- 1) c_main_~s~0) c_main_~r~0))) (let ((.cse7 (* .cse9 c_main_~y~0)) (.cse8 (* .cse6 c_main_~x~0))) (let ((.cse3 (+ .cse7 .cse8))) (or (not (= .cse3 (+ .cse4 c_main_~a~0))) .cse5 (= (+ (* .cse6 c_main_~xy~0) .cse7 .cse8 (* c_main_~yy~0 .cse9)) (+ .cse7 .cse8 (* .cse3 c_main_~y~0))))))) (let ((.cse13 (* (- 1) c_main_~s~0 c_main_~y~0)) (.cse11 (* c_main_~p~0 c_main_~x~0)) (.cse12 (* c_main_~r~0 c_main_~y~0)) (.cse14 (* (- 1) c_main_~q~0 c_main_~x~0))) (let ((.cse10 (+ c_main_~b~0 .cse13 .cse11 .cse12 .cse14))) (or (not (= (+ (* .cse10 c_main_~y~0) .cse11 .cse12) (+ c_main_~b~0 (* c_main_~yy~0 c_main_~r~0) .cse13 .cse11 .cse12 .cse14 (* c_main_~xy~0 c_main_~p~0)))) (not (= .cse10 c_main_~a~0)) (let ((.cse17 (+ c_main_~q~0 .cse20)) (.cse18 (+ c_main_~s~0 .cse19))) (let ((.cse15 (* c_main_~y~0 .cse18)) (.cse16 (* .cse17 c_main_~x~0))) (= (+ (* (+ .cse15 .cse16) c_main_~y~0) .cse15 .cse16) (+ .cse15 (* c_main_~xy~0 .cse17) .cse16 (* c_main_~yy~0 .cse18)))))))) (let ((.cse26 (+ c_main_~k~0 1))) (let ((.cse23 (+ (* (- 1) (* c_main_~s~0 .cse26)) c_main_~r~0)) (.cse22 (+ (* (- 1) c_main_~q~0 .cse26) c_main_~p~0))) (let ((.cse21 (* .cse22 c_main_~x~0)) (.cse24 (* .cse23 c_main_~y~0))) (let ((.cse25 (+ .cse21 .cse24))) (or .cse5 (= (+ .cse21 (* .cse22 c_main_~xy~0) (* c_main_~yy~0 .cse23) .cse24) (+ (* .cse25 c_main_~y~0) .cse21 .cse24)) (not (= .cse25 (+ .cse4 c_main_~c~0)))))))) (let ((.cse29 (* c_main_~s~0 c_main_~k~0)) (.cse30 (* (- 1) c_main_~q~0 c_main_~k~0))) (let ((.cse32 (+ c_main_~q~0 .cse20 (* (- 1) .cse30))) (.cse34 (+ c_main_~s~0 .cse29 .cse19))) (let ((.cse31 (* .cse34 c_main_~y~0)) (.cse33 (* .cse32 c_main_~x~0))) (let ((.cse35 (+ .cse31 .cse33))) (or (not (let ((.cse28 (+ c_main_~p~0 .cse30)) (.cse27 (+ c_main_~r~0 (* (- 1) .cse29)))) (= (+ (* .cse27 c_main_~y~0) (* .cse28 c_main_~x~0) (* c_main_~c~0 c_main_~y~0)) (+ (* c_main_~xy~0 .cse28) c_main_~c~0 (* c_main_~yy~0 .cse27))))) (= (+ .cse31 (* .cse32 c_main_~xy~0) .cse33 (* c_main_~yy~0 .cse34)) (+ (* .cse35 c_main_~y~0) .cse31 .cse33)) (not (= (+ c_main_~b~0 (* (- 1) c_main_~c~0)) .cse35))))))))))) is different from false [2022-03-20 05:44:05,599 WARN L232 SmtUtils]: Spent 14.72s on a formula simplification that was a NOOP. DAG size: 80 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 05:44:07,691 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:44:57,756 WARN L232 SmtUtils]: Spent 32.74s on a formula simplification that was a NOOP. DAG size: 107 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 05:45:01,052 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.81s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:45:02,224 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:45:04,276 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:45:06,279 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:45:09,068 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:45:12,803 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:45:14,436 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:45:15,772 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:45:18,013 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:45:20,774 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:45:22,780 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:45:33,676 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:45:36,437 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:45:38,853 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:45:40,860 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:45:54,742 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:45:54,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:45:54,754 INFO L93 Difference]: Finished difference Result 259 states and 342 transitions. [2022-03-20 05:45:54,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 05:45:54,755 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 12 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (39), 13 states have call predecessors, (39), 11 states have call successors, (39) Word has length 132 [2022-03-20 05:45:54,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:45:54,757 INFO L225 Difference]: With dead ends: 259 [2022-03-20 05:45:54,757 INFO L226 Difference]: Without dead ends: 259 [2022-03-20 05:45:54,758 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 241 SyntacticMatches, 7 SemanticMatches, 35 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 110.5s TimeCoverageRelationStatistics Valid=303, Invalid=885, Unknown=10, NotChecked=134, Total=1332 [2022-03-20 05:45:54,758 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 101 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 187 mSolverCounterUnsat, 14 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 1011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 14 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 40.6s IncrementalHoareTripleChecker+Time [2022-03-20 05:45:54,758 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 472 Invalid, 1011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 703 Invalid, 14 Unknown, 107 Unchecked, 40.6s Time] [2022-03-20 05:45:54,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-03-20 05:45:54,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 250. [2022-03-20 05:45:54,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 137 states have (on average 1.1240875912408759) internal successors, (154), 139 states have internal predecessors, (154), 89 states have call successors, (89), 24 states have call predecessors, (89), 23 states have return successors, (87), 86 states have call predecessors, (87), 87 states have call successors, (87) [2022-03-20 05:45:54,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 330 transitions. [2022-03-20 05:45:54,771 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 330 transitions. Word has length 132 [2022-03-20 05:45:54,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:45:54,771 INFO L478 AbstractCegarLoop]: Abstraction has 250 states and 330 transitions. [2022-03-20 05:45:54,771 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 12 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (39), 13 states have call predecessors, (39), 11 states have call successors, (39) [2022-03-20 05:45:54,771 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 330 transitions. [2022-03-20 05:45:54,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-03-20 05:45:54,773 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:45:54,773 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:45:54,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-20 05:45:54,973 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:45:54,974 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:45:54,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:45:54,974 INFO L85 PathProgramCache]: Analyzing trace with hash -928796440, now seen corresponding path program 2 times [2022-03-20 05:45:54,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:45:54,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162781915] [2022-03-20 05:45:54,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:45:54,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:45:54,993 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:45:54,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [509634066] [2022-03-20 05:45:54,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 05:45:54,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:45:54,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:45:54,995 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 05:45:54,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-20 05:45:55,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 05:45:55,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 05:45:55,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-20 05:45:55,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:45:56,643 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 69 proven. 90 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2022-03-20 05:45:56,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:45:57,428 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 05:45:57,430 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 05:46:08,927 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 69 proven. 90 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2022-03-20 05:46:08,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:46:08,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162781915] [2022-03-20 05:46:08,927 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:46:08,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509634066] [2022-03-20 05:46:08,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509634066] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 05:46:08,927 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 05:46:08,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2022-03-20 05:46:08,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752816914] [2022-03-20 05:46:08,928 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 05:46:08,928 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-20 05:46:08,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:46:08,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-20 05:46:08,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=674, Unknown=3, NotChecked=0, Total=812 [2022-03-20 05:46:08,929 INFO L87 Difference]: Start difference. First operand 250 states and 330 transitions. Second operand has 29 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 16 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (41), 12 states have call predecessors, (41), 14 states have call successors, (41) [2022-03-20 05:46:18,694 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:46:20,697 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:46:22,699 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:46:24,702 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:46:26,714 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:46:28,717 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:46:31,005 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:46:36,844 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:46:58,015 WARN L232 SmtUtils]: Spent 17.21s on a formula simplification. DAG size of input: 118 DAG size of output: 116 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 05:47:12,900 WARN L232 SmtUtils]: Spent 10.84s on a formula simplification. DAG size of input: 102 DAG size of output: 100 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 05:47:16,022 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:47:36,763 WARN L232 SmtUtils]: Spent 15.06s on a formula simplification that was a NOOP. DAG size: 73 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 05:47:39,962 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:48:17,154 WARN L232 SmtUtils]: Spent 33.43s on a formula simplification. DAG size of input: 122 DAG size of output: 120 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 05:48:41,753 WARN L232 SmtUtils]: Spent 19.84s on a formula simplification. DAG size of input: 98 DAG size of output: 96 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 05:48:44,855 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:48:46,858 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:48:48,862 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:48:50,866 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:48:52,622 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:49:00,873 WARN L232 SmtUtils]: Spent 7.28s on a formula simplification. DAG size of input: 94 DAG size of output: 92 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 05:49:20,842 WARN L232 SmtUtils]: Spent 8.77s on a formula simplification. DAG size of input: 100 DAG size of output: 98 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 05:49:23,946 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:49:26,015 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:49:39,211 WARN L232 SmtUtils]: Spent 9.38s on a formula simplification. DAG size of input: 99 DAG size of output: 97 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 05:49:44,445 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:49:45,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:49:45,974 INFO L93 Difference]: Finished difference Result 366 states and 504 transitions. [2022-03-20 05:49:45,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-20 05:49:45,975 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 16 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (41), 12 states have call predecessors, (41), 14 states have call successors, (41) Word has length 138 [2022-03-20 05:49:45,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:49:45,977 INFO L225 Difference]: With dead ends: 366 [2022-03-20 05:49:45,978 INFO L226 Difference]: Without dead ends: 360 [2022-03-20 05:49:45,979 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 246 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1227 ImplicationChecksByTransitivity, 171.9s TimeCoverageRelationStatistics Valid=917, Invalid=3630, Unknown=9, NotChecked=0, Total=4556 [2022-03-20 05:49:45,979 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 138 mSDsluCounter, 744 mSDsCounter, 0 mSdLazyCounter, 1126 mSolverCounterSat, 346 mSolverCounterUnsat, 17 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 55.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 804 SdHoareTripleChecker+Invalid, 1489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 346 IncrementalHoareTripleChecker+Valid, 1126 IncrementalHoareTripleChecker+Invalid, 17 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 56.1s IncrementalHoareTripleChecker+Time [2022-03-20 05:49:45,979 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 804 Invalid, 1489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [346 Valid, 1126 Invalid, 17 Unknown, 0 Unchecked, 56.1s Time] [2022-03-20 05:49:45,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-03-20 05:49:45,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 310. [2022-03-20 05:49:45,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 166 states have (on average 1.1325301204819278) internal successors, (188), 168 states have internal predecessors, (188), 117 states have call successors, (117), 27 states have call predecessors, (117), 26 states have return successors, (115), 114 states have call predecessors, (115), 115 states have call successors, (115) [2022-03-20 05:49:45,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 420 transitions. [2022-03-20 05:49:45,990 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 420 transitions. Word has length 138 [2022-03-20 05:49:45,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:49:45,990 INFO L478 AbstractCegarLoop]: Abstraction has 310 states and 420 transitions. [2022-03-20 05:49:45,991 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 16 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (41), 12 states have call predecessors, (41), 14 states have call successors, (41) [2022-03-20 05:49:45,991 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 420 transitions. [2022-03-20 05:49:45,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-03-20 05:49:45,993 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:49:45,993 INFO L499 BasicCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:49:46,016 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-03-20 05:49:46,207 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-20 05:49:46,207 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:49:46,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:49:46,208 INFO L85 PathProgramCache]: Analyzing trace with hash -739364489, now seen corresponding path program 4 times [2022-03-20 05:49:46,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:49:46,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380429043] [2022-03-20 05:49:46,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:49:46,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:49:46,216 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:49:46,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [374623604] [2022-03-20 05:49:46,216 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 05:49:46,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:49:46,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:49:46,218 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 05:49:46,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-20 05:49:46,320 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 05:49:46,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 05:49:46,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 99 conjunts are in the unsatisfiable core [2022-03-20 05:49:46,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:49:48,824 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 05:49:50,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 201 proven. 288 refuted. 0 times theorem prover too weak. 721 trivial. 0 not checked. [2022-03-20 05:49:50,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:49:55,442 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 05:49:56,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:49:56,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380429043] [2022-03-20 05:49:56,678 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:49:56,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374623604] [2022-03-20 05:49:56,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374623604] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 05:49:56,679 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 05:49:56,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2022-03-20 05:49:56,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789250331] [2022-03-20 05:49:56,679 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 05:49:56,679 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 05:49:56,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:49:56,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 05:49:56,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=649, Unknown=0, NotChecked=0, Total=812 [2022-03-20 05:49:56,680 INFO L87 Difference]: Start difference. First operand 310 states and 420 transitions. Second operand has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 17 states have internal predecessors, (39), 12 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 11 states have call predecessors, (30), 12 states have call successors, (30) [2022-03-20 05:50:04,942 WARN L232 SmtUtils]: Spent 5.83s on a formula simplification. DAG size of input: 61 DAG size of output: 51 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 05:50:06,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:50:06,784 INFO L93 Difference]: Finished difference Result 395 states and 530 transitions. [2022-03-20 05:50:06,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 05:50:06,784 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 17 states have internal predecessors, (39), 12 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 11 states have call predecessors, (30), 12 states have call successors, (30) Word has length 176 [2022-03-20 05:50:06,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:50:06,787 INFO L225 Difference]: With dead ends: 395 [2022-03-20 05:50:06,787 INFO L226 Difference]: Without dead ends: 395 [2022-03-20 05:50:06,788 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 185 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=207, Invalid=915, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 05:50:06,788 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 50 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 1005 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-03-20 05:50:06,788 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 485 Invalid, 1114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1005 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-03-20 05:50:06,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2022-03-20 05:50:06,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 390. [2022-03-20 05:50:06,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 210 states have (on average 1.1285714285714286) internal successors, (237), 212 states have internal predecessors, (237), 145 states have call successors, (145), 35 states have call predecessors, (145), 34 states have return successors, (143), 142 states have call predecessors, (143), 143 states have call successors, (143) [2022-03-20 05:50:06,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 525 transitions. [2022-03-20 05:50:06,802 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 525 transitions. Word has length 176 [2022-03-20 05:50:06,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:50:06,803 INFO L478 AbstractCegarLoop]: Abstraction has 390 states and 525 transitions. [2022-03-20 05:50:06,803 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 17 states have internal predecessors, (39), 12 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 11 states have call predecessors, (30), 12 states have call successors, (30) [2022-03-20 05:50:06,803 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 525 transitions. [2022-03-20 05:50:06,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-03-20 05:50:06,806 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:50:06,806 INFO L499 BasicCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:50:06,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-20 05:50:07,019 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-20 05:50:07,019 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:50:07,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:50:07,020 INFO L85 PathProgramCache]: Analyzing trace with hash 980979816, now seen corresponding path program 3 times [2022-03-20 05:50:07,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:50:07,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129969343] [2022-03-20 05:50:07,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:50:07,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:50:07,039 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:50:07,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [129795125] [2022-03-20 05:50:07,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 05:50:07,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:50:07,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:50:07,041 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 05:50:07,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-20 05:50:07,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-20 05:50:07,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 05:50:07,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-20 05:50:07,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:50:08,474 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 05:50:08,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 113 proven. 83 refuted. 0 times theorem prover too weak. 1113 trivial. 0 not checked. [2022-03-20 05:50:08,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:50:09,942 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 05:50:43,771 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 05:52:30,245 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 05:54:44,635 WARN L855 $PredicateComparison]: unable to prove that (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (or (forall ((v_main_~y~0_BEFORE_CALL_251 Int) (v_main_~p~0_BEFORE_CALL_181 Int) (v_main_~s~0_BEFORE_CALL_240 Int) (v_main_~r~0_BEFORE_CALL_191 Int) (v_main_~x~0_BEFORE_CALL_255 Int) (v_main_~b~0_BEFORE_CALL_224 Int) (v_main_~q~0_BEFORE_CALL_242 Int) (v_main_~k~0_BEFORE_CALL_128 Int)) (or (<= v_main_~b~0_BEFORE_CALL_224 0) (= (+ (* v_main_~y~0_BEFORE_CALL_251 (+ (* (- 1) (* v_main_~k~0_BEFORE_CALL_128 v_main_~s~0_BEFORE_CALL_240)) v_main_~r~0_BEFORE_CALL_191)) (* v_main_~x~0_BEFORE_CALL_255 (+ v_main_~p~0_BEFORE_CALL_181 (* (- 1) v_main_~k~0_BEFORE_CALL_128 v_main_~q~0_BEFORE_CALL_242)))) 0) (= (mod (* v_main_~k~0_BEFORE_CALL_128 v_main_~b~0_BEFORE_CALL_224) v_main_~b~0_BEFORE_CALL_224) 0))) (not (= |c___VERIFIER_assert_#in~cond| 1)))) is different from true [2022-03-20 05:55:44,832 WARN L855 $PredicateComparison]: unable to prove that (or (= c___VERIFIER_assert_~cond 0) (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (or (forall ((v_main_~y~0_BEFORE_CALL_251 Int) (v_main_~p~0_BEFORE_CALL_181 Int) (v_main_~s~0_BEFORE_CALL_240 Int) (v_main_~r~0_BEFORE_CALL_191 Int) (v_main_~x~0_BEFORE_CALL_255 Int) (v_main_~b~0_BEFORE_CALL_224 Int) (v_main_~q~0_BEFORE_CALL_242 Int) (v_main_~k~0_BEFORE_CALL_128 Int)) (or (<= v_main_~b~0_BEFORE_CALL_224 0) (= (+ (* v_main_~y~0_BEFORE_CALL_251 (+ (* (- 1) (* v_main_~k~0_BEFORE_CALL_128 v_main_~s~0_BEFORE_CALL_240)) v_main_~r~0_BEFORE_CALL_191)) (* v_main_~x~0_BEFORE_CALL_255 (+ v_main_~p~0_BEFORE_CALL_181 (* (- 1) v_main_~k~0_BEFORE_CALL_128 v_main_~q~0_BEFORE_CALL_242)))) 0) (= (mod (* v_main_~k~0_BEFORE_CALL_128 v_main_~b~0_BEFORE_CALL_224) v_main_~b~0_BEFORE_CALL_224) 0))) (not (= |c___VERIFIER_assert_#in~cond| 1))))) is different from true [2022-03-20 05:56:18,903 WARN L855 $PredicateComparison]: unable to prove that (or (forall ((v_main_~y~0_BEFORE_CALL_251 Int) (v_main_~p~0_BEFORE_CALL_181 Int) (v_main_~s~0_BEFORE_CALL_240 Int) (v_main_~r~0_BEFORE_CALL_191 Int) (v_main_~x~0_BEFORE_CALL_255 Int) (v_main_~b~0_BEFORE_CALL_224 Int) (v_main_~q~0_BEFORE_CALL_242 Int) (v_main_~k~0_BEFORE_CALL_128 Int)) (or (<= v_main_~b~0_BEFORE_CALL_224 0) (= (+ (* v_main_~y~0_BEFORE_CALL_251 (+ (* (- 1) (* v_main_~k~0_BEFORE_CALL_128 v_main_~s~0_BEFORE_CALL_240)) v_main_~r~0_BEFORE_CALL_191)) (* v_main_~x~0_BEFORE_CALL_255 (+ v_main_~p~0_BEFORE_CALL_181 (* (- 1) v_main_~k~0_BEFORE_CALL_128 v_main_~q~0_BEFORE_CALL_242)))) 0) (= (mod (* v_main_~k~0_BEFORE_CALL_128 v_main_~b~0_BEFORE_CALL_224) v_main_~b~0_BEFORE_CALL_224) 0))) (not (= |c___VERIFIER_assert_#in~cond| 1))) is different from true [2022-03-20 05:56:27,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 126 proven. 79 refuted. 12 times theorem prover too weak. 1090 trivial. 2 not checked. [2022-03-20 05:56:27,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:56:27,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129969343] [2022-03-20 05:56:27,582 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:56:27,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129795125] [2022-03-20 05:56:27,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129795125] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 05:56:27,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 05:56:27,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 29 [2022-03-20 05:56:27,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112514668] [2022-03-20 05:56:27,582 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 05:56:27,583 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-20 05:56:27,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:56:27,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-20 05:56:27,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=556, Unknown=3, NotChecked=150, Total=812 [2022-03-20 05:56:27,584 INFO L87 Difference]: Start difference. First operand 390 states and 525 transitions. Second operand has 29 states, 27 states have (on average 2.037037037037037) internal successors, (55), 25 states have internal predecessors, (55), 15 states have call successors, (44), 3 states have call predecessors, (44), 3 states have return successors, (41), 11 states have call predecessors, (41), 13 states have call successors, (41) [2022-03-20 05:56:47,523 WARN L232 SmtUtils]: Spent 12.02s on a formula simplification that was a NOOP. DAG size: 32 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 05:56:49,526 WARN L855 $PredicateComparison]: unable to prove that (and (<= 1 c___VERIFIER_assert_~cond) (or (= c___VERIFIER_assert_~cond 0) (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (or (forall ((v_main_~y~0_BEFORE_CALL_251 Int) (v_main_~p~0_BEFORE_CALL_181 Int) (v_main_~s~0_BEFORE_CALL_240 Int) (v_main_~r~0_BEFORE_CALL_191 Int) (v_main_~x~0_BEFORE_CALL_255 Int) (v_main_~b~0_BEFORE_CALL_224 Int) (v_main_~q~0_BEFORE_CALL_242 Int) (v_main_~k~0_BEFORE_CALL_128 Int)) (or (<= v_main_~b~0_BEFORE_CALL_224 0) (= (+ (* v_main_~y~0_BEFORE_CALL_251 (+ (* (- 1) (* v_main_~k~0_BEFORE_CALL_128 v_main_~s~0_BEFORE_CALL_240)) v_main_~r~0_BEFORE_CALL_191)) (* v_main_~x~0_BEFORE_CALL_255 (+ v_main_~p~0_BEFORE_CALL_181 (* (- 1) v_main_~k~0_BEFORE_CALL_128 v_main_~q~0_BEFORE_CALL_242)))) 0) (= (mod (* v_main_~k~0_BEFORE_CALL_128 v_main_~b~0_BEFORE_CALL_224) v_main_~b~0_BEFORE_CALL_224) 0))) (not (= |c___VERIFIER_assert_#in~cond| 1))))) (= |c___VERIFIER_assert_#in~cond| c___VERIFIER_assert_~cond)) is different from true [2022-03-20 05:56:58,954 WARN L855 $PredicateComparison]: unable to prove that (and (or (= c___VERIFIER_assert_~cond 0) (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (or (forall ((v_main_~y~0_BEFORE_CALL_251 Int) (v_main_~p~0_BEFORE_CALL_181 Int) (v_main_~s~0_BEFORE_CALL_240 Int) (v_main_~r~0_BEFORE_CALL_191 Int) (v_main_~x~0_BEFORE_CALL_255 Int) (v_main_~b~0_BEFORE_CALL_224 Int) (v_main_~q~0_BEFORE_CALL_242 Int) (v_main_~k~0_BEFORE_CALL_128 Int)) (or (<= v_main_~b~0_BEFORE_CALL_224 0) (= (+ (* v_main_~y~0_BEFORE_CALL_251 (+ (* (- 1) (* v_main_~k~0_BEFORE_CALL_128 v_main_~s~0_BEFORE_CALL_240)) v_main_~r~0_BEFORE_CALL_191)) (* v_main_~x~0_BEFORE_CALL_255 (+ v_main_~p~0_BEFORE_CALL_181 (* (- 1) v_main_~k~0_BEFORE_CALL_128 v_main_~q~0_BEFORE_CALL_242)))) 0) (= (mod (* v_main_~k~0_BEFORE_CALL_128 v_main_~b~0_BEFORE_CALL_224) v_main_~b~0_BEFORE_CALL_224) 0))) (not (= |c___VERIFIER_assert_#in~cond| 1))))) (= |c___VERIFIER_assert_#in~cond| c___VERIFIER_assert_~cond)) is different from true [2022-03-20 05:57:02,682 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:57:06,618 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []