/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 08:09:05,793 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 08:09:05,795 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 08:09:05,828 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-06 08:09:05,828 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-06 08:09:05,829 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-06 08:09:05,833 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-06 08:09:05,837 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-06 08:09:05,838 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-06 08:09:05,842 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-06 08:09:05,842 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-06 08:09:05,843 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-06 08:09:05,844 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 08:09:05,845 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 08:09:05,846 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 08:09:05,846 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 08:09:05,847 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 08:09:05,847 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 08:09:05,850 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 08:09:05,854 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 08:09:05,855 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 08:09:05,856 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 08:09:05,856 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 08:09:05,857 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 08:09:05,857 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 08:09:05,862 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 08:09:05,867 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 08:09:05,867 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 08:09:05,868 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 08:09:05,869 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-04-06 08:09:05,881 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 08:09:05,881 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 08:09:05,882 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 08:09:05,882 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 08:09:05,882 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 08:09:05,882 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 08:09:05,882 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 08:09:05,883 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 08:09:05,883 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 08:09:05,883 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 08:09:05,883 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 08:09:05,883 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 08:09:05,884 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 08:09:05,884 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 08:09:05,884 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 08:09:05,884 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 08:09:05,884 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 08:09:05,884 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 08:09:05,884 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 08:09:05,884 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 08:09:05,884 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-06 08:09:05,885 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-06 08:09:05,885 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 08:09:06,072 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 08:09:06,094 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 08:09:06,096 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 08:09:06,097 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 08:09:06,098 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 08:09:06,098 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound50.c [2022-04-06 08:09:06,151 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3529a84e/13b75543ebd7473b8a64c3ff86d4ca67/FLAG7c068d199 [2022-04-06 08:09:06,481 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 08:09:06,481 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound50.c [2022-04-06 08:09:06,485 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3529a84e/13b75543ebd7473b8a64c3ff86d4ca67/FLAG7c068d199 [2022-04-06 08:09:06,493 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3529a84e/13b75543ebd7473b8a64c3ff86d4ca67 [2022-04-06 08:09:06,494 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 08:09:06,495 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-06 08:09:06,496 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 08:09:06,496 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 08:09:06,501 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 08:09:06,502 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 08:09:06" (1/1) ... [2022-04-06 08:09:06,502 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@379b9b3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:09:06, skipping insertion in model container [2022-04-06 08:09:06,502 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 08:09:06" (1/1) ... [2022-04-06 08:09:06,507 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 08:09:06,520 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 08:09:06,639 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound50.c[537,550] [2022-04-06 08:09:06,648 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 08:09:06,653 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 08:09:06,664 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound50.c[537,550] [2022-04-06 08:09:06,668 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 08:09:06,675 INFO L208 MainTranslator]: Completed translation [2022-04-06 08:09:06,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:09:06 WrapperNode [2022-04-06 08:09:06,676 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 08:09:06,677 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 08:09:06,677 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 08:09:06,677 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 08:09:06,684 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:09:06" (1/1) ... [2022-04-06 08:09:06,685 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:09:06" (1/1) ... [2022-04-06 08:09:06,688 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:09:06" (1/1) ... [2022-04-06 08:09:06,688 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:09:06" (1/1) ... [2022-04-06 08:09:06,691 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:09:06" (1/1) ... [2022-04-06 08:09:06,693 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:09:06" (1/1) ... [2022-04-06 08:09:06,694 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:09:06" (1/1) ... [2022-04-06 08:09:06,695 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 08:09:06,697 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 08:09:06,697 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 08:09:06,697 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 08:09:06,698 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:09:06" (1/1) ... [2022-04-06 08:09:06,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 08:09:06,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 08:09:06,727 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 08:09:06,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 08:09:06,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 08:09:06,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 08:09:06,761 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 08:09:06,761 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 08:09:06,762 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 08:09:06,762 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 08:09:06,762 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 08:09:06,762 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 08:09:06,762 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 08:09:06,762 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 08:09:06,762 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 08:09:06,763 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 08:09:06,763 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 08:09:06,763 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 08:09:06,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 08:09:06,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 08:09:06,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 08:09:06,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 08:09:06,765 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 08:09:06,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 08:09:06,812 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 08:09:06,813 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 08:09:06,885 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 08:09:06,889 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 08:09:06,889 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 08:09:06,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:09:06 BoogieIcfgContainer [2022-04-06 08:09:06,891 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 08:09:06,891 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-06 08:09:06,891 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-06 08:09:06,892 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-06 08:09:06,894 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:09:06" (1/1) ... [2022-04-06 08:09:06,895 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-04-06 08:09:06,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 08:09:06 BasicIcfg [2022-04-06 08:09:06,906 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-06 08:09:06,907 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 08:09:06,908 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 08:09:06,909 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 08:09:06,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 08:09:06" (1/4) ... [2022-04-06 08:09:06,910 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65680b0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 08:09:06, skipping insertion in model container [2022-04-06 08:09:06,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:09:06" (2/4) ... [2022-04-06 08:09:06,910 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65680b0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 08:09:06, skipping insertion in model container [2022-04-06 08:09:06,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:09:06" (3/4) ... [2022-04-06 08:09:06,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65680b0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 08:09:06, skipping insertion in model container [2022-04-06 08:09:06,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 08:09:06" (4/4) ... [2022-04-06 08:09:06,911 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_valuebound50.cJordan [2022-04-06 08:09:06,914 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-04-06 08:09:06,914 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 08:09:06,940 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 08:09:06,944 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 08:09:06,945 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 08:09:06,953 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 08:09:06,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 08:09:06,958 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:09:06,959 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:09:06,959 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:09:06,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:09:06,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1656134296, now seen corresponding path program 1 times [2022-04-06 08:09:06,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:09:06,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381616774] [2022-04-06 08:09:06,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:09:06,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:09:07,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:09:07,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 08:09:07,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:09:07,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 08:09:07,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:09:07,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 08:09:07,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:09:07,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 08:09:07,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:09:07,145 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 08:09:07,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:09:07,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381616774] [2022-04-06 08:09:07,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381616774] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 08:09:07,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 08:09:07,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 08:09:07,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301487920] [2022-04-06 08:09:07,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 08:09:07,150 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 08:09:07,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:09:07,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 08:09:07,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 08:09:07,172 INFO L87 Difference]: Start difference. First operand has 32 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 08:09:07,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:09:07,208 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-04-06 08:09:07,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 08:09:07,210 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-04-06 08:09:07,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:09:07,215 INFO L225 Difference]: With dead ends: 32 [2022-04-06 08:09:07,215 INFO L226 Difference]: Without dead ends: 27 [2022-04-06 08:09:07,216 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 08:09:07,219 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 19 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 08:09:07,219 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 34 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 08:09:07,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-04-06 08:09:07,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-04-06 08:09:07,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 08:09:07,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-04-06 08:09:07,241 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 28 [2022-04-06 08:09:07,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:09:07,241 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-04-06 08:09:07,242 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 08:09:07,242 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-04-06 08:09:07,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 08:09:07,243 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:09:07,243 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:09:07,243 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 08:09:07,243 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:09:07,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:09:07,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1063826184, now seen corresponding path program 1 times [2022-04-06 08:09:07,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:09:07,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996449749] [2022-04-06 08:09:07,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:09:07,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:09:07,258 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 08:09:07,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1573934199] [2022-04-06 08:09:07,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:09:07,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:09:07,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 08:09:07,260 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 08:09:07,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 08:09:07,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:09:07,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 08:09:07,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 08:09:07,454 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 08:09:07,454 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 08:09:07,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:09:07,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996449749] [2022-04-06 08:09:07,455 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 08:09:07,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573934199] [2022-04-06 08:09:07,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573934199] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 08:09:07,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 08:09:07,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 08:09:07,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021044216] [2022-04-06 08:09:07,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 08:09:07,458 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 08:09:07,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:09:07,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 08:09:07,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 08:09:07,460 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-04-06 08:09:07,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:09:07,538 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2022-04-06 08:09:07,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 08:09:07,539 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2022-04-06 08:09:07,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:09:07,541 INFO L225 Difference]: With dead ends: 37 [2022-04-06 08:09:07,541 INFO L226 Difference]: Without dead ends: 37 [2022-04-06 08:09:07,541 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 08:09:07,542 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 8 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 08:09:07,542 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 87 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 08:09:07,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-04-06 08:09:07,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2022-04-06 08:09:07,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.15) internal successors, (23), 22 states have internal predecessors, (23), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 08:09:07,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-04-06 08:09:07,548 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 28 [2022-04-06 08:09:07,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:09:07,549 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-04-06 08:09:07,549 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-04-06 08:09:07,549 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-04-06 08:09:07,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 08:09:07,550 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:09:07,550 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:09:07,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 08:09:07,750 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:09:07,751 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:09:07,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:09:07,752 INFO L85 PathProgramCache]: Analyzing trace with hash -499634320, now seen corresponding path program 1 times [2022-04-06 08:09:07,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:09:07,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737697077] [2022-04-06 08:09:07,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:09:07,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:09:07,765 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 08:09:07,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [768629467] [2022-04-06 08:09:07,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:09:07,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:09:07,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 08:09:07,778 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 08:09:07,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 08:09:07,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:09:07,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 08:09:07,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 08:09:07,912 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 08:09:07,912 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 08:09:07,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:09:07,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737697077] [2022-04-06 08:09:07,913 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 08:09:07,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768629467] [2022-04-06 08:09:07,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768629467] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 08:09:07,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 08:09:07,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 08:09:07,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053334880] [2022-04-06 08:09:07,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 08:09:07,915 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 08:09:07,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:09:07,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 08:09:07,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 08:09:07,917 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 08:09:07,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:09:07,993 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2022-04-06 08:09:07,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 08:09:07,994 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2022-04-06 08:09:07,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:09:07,995 INFO L225 Difference]: With dead ends: 36 [2022-04-06 08:09:07,995 INFO L226 Difference]: Without dead ends: 36 [2022-04-06 08:09:07,996 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-06 08:09:07,998 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 14 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 08:09:08,000 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 89 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 08:09:08,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-04-06 08:09:08,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2022-04-06 08:09:08,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 08:09:08,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-04-06 08:09:08,005 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 34 [2022-04-06 08:09:08,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:09:08,006 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-04-06 08:09:08,006 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 08:09:08,006 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-04-06 08:09:08,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 08:09:08,006 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:09:08,007 INFO L499 BasicCegarLoop]: trace histogram [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] [2022-04-06 08:09:08,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 08:09:08,211 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-04-06 08:09:08,212 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:09:08,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:09:08,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1096608558, now seen corresponding path program 1 times [2022-04-06 08:09:08,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:09:08,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704831452] [2022-04-06 08:09:08,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:09:08,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:09:08,223 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 08:09:08,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1077164158] [2022-04-06 08:09:08,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:09:08,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:09:08,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 08:09:08,232 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 08:09:08,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 08:09:08,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:09:08,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 08:09:08,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 08:09:10,954 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 08:09:10,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 08:09:20,841 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 08:09:20,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:09:20,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704831452] [2022-04-06 08:09:20,842 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 08:09:20,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077164158] [2022-04-06 08:09:20,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077164158] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 08:09:20,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 08:09:20,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2022-04-06 08:09:20,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517216455] [2022-04-06 08:09:20,843 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 08:09:20,843 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 08:09:20,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:09:20,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 08:09:20,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=166, Unknown=1, NotChecked=0, Total=210 [2022-04-06 08:09:20,844 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 13 states have internal predecessors, (27), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 08:09:22,846 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 08:09:23,966 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 08:09:25,998 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 08:09:33,271 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 08:09:33,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:09:33,680 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2022-04-06 08:09:33,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 08:09:33,681 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 13 states have internal predecessors, (27), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 37 [2022-04-06 08:09:33,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:09:33,682 INFO L225 Difference]: With dead ends: 50 [2022-04-06 08:09:33,682 INFO L226 Difference]: Without dead ends: 50 [2022-04-06 08:09:33,683 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=78, Invalid=300, Unknown=2, NotChecked=0, Total=380 [2022-04-06 08:09:33,683 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 26 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2022-04-06 08:09:33,684 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 200 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 7.8s Time] [2022-04-06 08:09:33,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-04-06 08:09:33,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2022-04-06 08:09:33,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 33 states have internal predecessors, (37), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 08:09:33,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2022-04-06 08:09:33,688 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 37 [2022-04-06 08:09:33,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:09:33,688 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2022-04-06 08:09:33,689 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 13 states have internal predecessors, (27), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 08:09:33,689 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2022-04-06 08:09:33,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 08:09:33,689 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:09:33,689 INFO L499 BasicCegarLoop]: trace histogram [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] [2022-04-06 08:09:33,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 08:09:33,890 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:09:33,890 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:09:33,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:09:33,891 INFO L85 PathProgramCache]: Analyzing trace with hash -209104877, now seen corresponding path program 1 times [2022-04-06 08:09:33,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:09:33,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988556171] [2022-04-06 08:09:33,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:09:33,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:09:33,900 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 08:09:33,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1280818548] [2022-04-06 08:09:33,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:09:33,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:09:33,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 08:09:33,901 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 08:09:33,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 08:09:33,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:09:33,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 08:09:33,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 08:09:34,950 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 08:09:34,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 08:09:35,818 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 08:09:35,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:09:35,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988556171] [2022-04-06 08:09:35,818 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 08:09:35,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280818548] [2022-04-06 08:09:35,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280818548] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 08:09:35,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 08:09:35,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2022-04-06 08:09:35,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636091114] [2022-04-06 08:09:35,819 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 08:09:35,819 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 08:09:35,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:09:35,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 08:09:35,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-04-06 08:09:35,820 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 16 states have internal predecessors, (32), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-04-06 08:09:36,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:09:36,898 INFO L93 Difference]: Finished difference Result 71 states and 84 transitions. [2022-04-06 08:09:36,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 08:09:36,899 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 16 states have internal predecessors, (32), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 37 [2022-04-06 08:09:36,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:09:36,900 INFO L225 Difference]: With dead ends: 71 [2022-04-06 08:09:36,900 INFO L226 Difference]: Without dead ends: 71 [2022-04-06 08:09:36,900 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2022-04-06 08:09:36,901 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 50 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 08:09:36,901 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 118 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 08:09:36,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-04-06 08:09:36,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-04-06 08:09:36,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 49 states have (on average 1.183673469387755) internal successors, (58), 53 states have internal predecessors, (58), 14 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 9 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 08:09:36,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 84 transitions. [2022-04-06 08:09:36,907 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 84 transitions. Word has length 37 [2022-04-06 08:09:36,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:09:36,907 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 84 transitions. [2022-04-06 08:09:36,907 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 16 states have internal predecessors, (32), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-04-06 08:09:36,908 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 84 transitions. [2022-04-06 08:09:36,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 08:09:36,908 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:09:36,908 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2022-04-06 08:09:36,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 08:09:37,109 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:09:37,109 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:09:37,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:09:37,110 INFO L85 PathProgramCache]: Analyzing trace with hash -266261558, now seen corresponding path program 1 times [2022-04-06 08:09:37,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:09:37,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942604353] [2022-04-06 08:09:37,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:09:37,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:09:37,118 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 08:09:37,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1294678664] [2022-04-06 08:09:37,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:09:37,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:09:37,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 08:09:37,120 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 08:09:37,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 08:09:37,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:09:37,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 08:09:37,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 08:09:37,244 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 08:09:37,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 08:09:37,350 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 08:09:37,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:09:37,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942604353] [2022-04-06 08:09:37,350 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 08:09:37,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294678664] [2022-04-06 08:09:37,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294678664] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 08:09:37,357 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 08:09:37,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-04-06 08:09:37,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318087274] [2022-04-06 08:09:37,358 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 08:09:37,358 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 08:09:37,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:09:37,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 08:09:37,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-04-06 08:09:37,359 INFO L87 Difference]: Start difference. First operand 71 states and 84 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2022-04-06 08:09:39,366 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 08:09:39,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:09:39,446 INFO L93 Difference]: Finished difference Result 75 states and 87 transitions. [2022-04-06 08:09:39,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 08:09:39,447 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) Word has length 43 [2022-04-06 08:09:39,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:09:39,448 INFO L225 Difference]: With dead ends: 75 [2022-04-06 08:09:39,448 INFO L226 Difference]: Without dead ends: 70 [2022-04-06 08:09:39,448 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-04-06 08:09:39,448 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 16 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-04-06 08:09:39,449 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 124 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-04-06 08:09:39,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-04-06 08:09:39,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-04-06 08:09:39,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 52 states have internal predecessors, (55), 13 states have call successors, (13), 8 states have call predecessors, (13), 7 states have return successors, (12), 9 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 08:09:39,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 80 transitions. [2022-04-06 08:09:39,454 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 80 transitions. Word has length 43 [2022-04-06 08:09:39,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:09:39,454 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 80 transitions. [2022-04-06 08:09:39,454 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2022-04-06 08:09:39,454 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 80 transitions. [2022-04-06 08:09:39,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 08:09:39,456 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:09:39,456 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:09:39,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 08:09:39,656 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:09:39,657 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:09:39,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:09:39,657 INFO L85 PathProgramCache]: Analyzing trace with hash -172555565, now seen corresponding path program 1 times [2022-04-06 08:09:39,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:09:39,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851927326] [2022-04-06 08:09:39,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:09:39,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:09:39,666 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 08:09:39,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [11749361] [2022-04-06 08:09:39,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:09:39,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:09:39,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 08:09:39,668 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 08:09:39,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 08:09:39,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:09:39,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 44 conjunts are in the unsatisfiable core [2022-04-06 08:09:39,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 08:09:48,599 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 10 proven. 23 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-04-06 08:09:48,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 08:09:51,305 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-04-06 08:09:51,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:09:51,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851927326] [2022-04-06 08:09:51,305 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 08:09:51,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11749361] [2022-04-06 08:09:51,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11749361] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 08:09:51,305 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 08:09:51,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 22 [2022-04-06 08:09:51,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227319201] [2022-04-06 08:09:51,307 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 08:09:51,307 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 08:09:51,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:09:51,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 08:09:51,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2022-04-06 08:09:51,308 INFO L87 Difference]: Start difference. First operand 70 states and 80 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-04-06 08:09:56,250 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 08:10:01,868 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 08:10:02,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:10:02,055 INFO L93 Difference]: Finished difference Result 94 states and 108 transitions. [2022-04-06 08:10:02,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 08:10:02,056 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 55 [2022-04-06 08:10:02,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:10:02,057 INFO L225 Difference]: With dead ends: 94 [2022-04-06 08:10:02,057 INFO L226 Difference]: Without dead ends: 94 [2022-04-06 08:10:02,057 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 87 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2022-04-06 08:10:02,057 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 32 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 17 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-04-06 08:10:02,058 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 182 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 194 Invalid, 1 Unknown, 32 Unchecked, 7.1s Time] [2022-04-06 08:10:02,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-04-06 08:10:02,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-04-06 08:10:02,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 67 states have (on average 1.1194029850746268) internal successors, (75), 72 states have internal predecessors, (75), 17 states have call successors, (17), 10 states have call predecessors, (17), 9 states have return successors, (16), 11 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 08:10:02,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 108 transitions. [2022-04-06 08:10:02,063 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 108 transitions. Word has length 55 [2022-04-06 08:10:02,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:10:02,064 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 108 transitions. [2022-04-06 08:10:02,064 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-04-06 08:10:02,064 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 108 transitions. [2022-04-06 08:10:02,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-04-06 08:10:02,065 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:10:02,065 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:10:02,084 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-04-06 08:10:02,265 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:10:02,266 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:10:02,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:10:02,266 INFO L85 PathProgramCache]: Analyzing trace with hash 2101955993, now seen corresponding path program 2 times [2022-04-06 08:10:02,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:10:02,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274126791] [2022-04-06 08:10:02,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:10:02,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:10:02,281 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 08:10:02,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [45689461] [2022-04-06 08:10:02,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 08:10:02,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:10:02,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 08:10:02,282 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 08:10:02,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 08:10:02,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 08:10:02,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 08:10:02,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 54 conjunts are in the unsatisfiable core [2022-04-06 08:10:02,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 08:12:46,489 WARN L232 SmtUtils]: Spent 5.49s on a formula simplification. DAG size of input: 3 DAG size of output: 1 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-04-06 08:14:58,874 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-04-06 08:14:58,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 08:15:13,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:15:13,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274126791] [2022-04-06 08:15:13,354 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 08:15:13,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45689461] [2022-04-06 08:15:13,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45689461] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 08:15:13,354 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 08:15:13,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-04-06 08:15:13,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896474956] [2022-04-06 08:15:13,354 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-06 08:15:13,354 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 08:15:13,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:15:13,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 08:15:13,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=562, Unknown=4, NotChecked=0, Total=702 [2022-04-06 08:15:13,355 INFO L87 Difference]: Start difference. First operand 94 states and 108 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 16 states have internal predecessors, (34), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-04-06 08:15:17,816 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 08:15:19,861 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 08:15:21,147 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 08:15:23,629 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 08:15:25,919 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 08:15:28,175 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 08:15:32,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:15:32,040 INFO L93 Difference]: Finished difference Result 119 states and 135 transitions. [2022-04-06 08:15:32,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 08:15:32,042 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 16 states have internal predecessors, (34), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 64 [2022-04-06 08:15:32,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:15:32,043 INFO L225 Difference]: With dead ends: 119 [2022-04-06 08:15:32,043 INFO L226 Difference]: Without dead ends: 119 [2022-04-06 08:15:32,044 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 60 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=149, Invalid=659, Unknown=4, NotChecked=0, Total=812 [2022-04-06 08:15:32,044 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 21 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.5s IncrementalHoareTripleChecker+Time [2022-04-06 08:15:32,044 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 280 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 505 Invalid, 2 Unknown, 0 Unchecked, 16.5s Time] [2022-04-06 08:15:32,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-04-06 08:15:32,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 116. [2022-04-06 08:15:32,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 84 states have (on average 1.119047619047619) internal successors, (94), 89 states have internal predecessors, (94), 19 states have call successors, (19), 13 states have call predecessors, (19), 12 states have return successors, (18), 13 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 08:15:32,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 131 transitions. [2022-04-06 08:15:32,051 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 131 transitions. Word has length 64 [2022-04-06 08:15:32,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:15:32,051 INFO L478 AbstractCegarLoop]: Abstraction has 116 states and 131 transitions. [2022-04-06 08:15:32,051 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 16 states have internal predecessors, (34), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-04-06 08:15:32,051 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 131 transitions. [2022-04-06 08:15:32,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-04-06 08:15:32,052 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:15:32,052 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:15:32,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 08:15:32,273 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:15:32,274 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:15:32,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:15:32,275 INFO L85 PathProgramCache]: Analyzing trace with hash 909690039, now seen corresponding path program 3 times [2022-04-06 08:15:32,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:15:32,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793624568] [2022-04-06 08:15:32,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:15:32,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:15:32,291 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 08:15:32,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1513893162] [2022-04-06 08:15:32,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 08:15:32,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:15:32,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 08:15:32,301 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 08:15:32,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 08:15:32,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-04-06 08:15:32,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 08:15:32,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 08:15:32,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 08:15:34,970 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 08:15:38,096 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 46 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-04-06 08:15:38,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 08:15:40,905 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 40 proven. 11 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-04-06 08:15:40,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:15:40,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793624568] [2022-04-06 08:15:40,906 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 08:15:40,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513893162] [2022-04-06 08:15:40,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513893162] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 08:15:40,906 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 08:15:40,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-04-06 08:15:40,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982940137] [2022-04-06 08:15:40,906 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 08:15:40,907 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 08:15:40,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:15:40,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 08:15:40,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=268, Unknown=3, NotChecked=0, Total=342 [2022-04-06 08:15:40,907 INFO L87 Difference]: Start difference. First operand 116 states and 131 transitions. Second operand has 19 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 6 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-04-06 08:15:41,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:15:41,878 INFO L93 Difference]: Finished difference Result 127 states and 143 transitions. [2022-04-06 08:15:41,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 08:15:41,878 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 6 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 64 [2022-04-06 08:15:41,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:15:41,879 INFO L225 Difference]: With dead ends: 127 [2022-04-06 08:15:41,879 INFO L226 Difference]: Without dead ends: 51 [2022-04-06 08:15:41,879 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=131, Invalid=466, Unknown=3, NotChecked=0, Total=600 [2022-04-06 08:15:41,880 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 23 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 08:15:41,880 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 176 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 162 Invalid, 0 Unknown, 1 Unchecked, 0.5s Time] [2022-04-06 08:15:41,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-04-06 08:15:41,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-04-06 08:15:41,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 36 states have internal predecessors, (36), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 08:15:41,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2022-04-06 08:15:41,886 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 64 [2022-04-06 08:15:41,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:15:41,886 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2022-04-06 08:15:41,886 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 6 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-04-06 08:15:41,887 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2022-04-06 08:15:41,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-04-06 08:15:41,887 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:15:41,887 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:15:41,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 08:15:42,099 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-04-06 08:15:42,100 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:15:42,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:15:42,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1167519304, now seen corresponding path program 2 times [2022-04-06 08:15:42,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:15:42,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462765407] [2022-04-06 08:15:42,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:15:42,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:15:42,106 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 08:15:42,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [667359527] [2022-04-06 08:15:42,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 08:15:42,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:15:42,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 08:15:42,107 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 08:15:42,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 08:15:42,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 08:15:42,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 08:15:42,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 49 conjunts are in the unsatisfiable core [2022-04-06 08:15:42,149 INFO L286 TraceCheckSpWp]: Computing forward predicates...