/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/fermat1-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-14 22:57:41,963 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-14 22:57:41,964 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-14 22:57:42,012 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-14 22:57:42,012 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-14 22:57:42,013 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-14 22:57:42,014 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-14 22:57:42,015 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-14 22:57:42,016 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-14 22:57:42,016 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-14 22:57:42,017 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-14 22:57:42,017 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-14 22:57:42,018 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-14 22:57:42,018 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-14 22:57:42,019 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-14 22:57:42,020 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-14 22:57:42,020 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-14 22:57:42,021 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-14 22:57:42,022 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-14 22:57:42,023 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-14 22:57:42,024 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-14 22:57:42,024 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-14 22:57:42,025 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-14 22:57:42,026 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-14 22:57:42,027 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-14 22:57:42,032 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-14 22:57:42,033 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-14 22:57:42,033 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-14 22:57:42,037 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-14 22:57:42,044 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-14 22:57:42,044 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-14 22:57:42,045 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-14 22:57:42,045 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-14 22:57:42,045 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-14 22:57:42,045 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-14 22:57:42,045 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-14 22:57:42,045 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-14 22:57:42,045 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-14 22:57:42,046 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-14 22:57:42,046 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-14 22:57:42,046 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-14 22:57:42,046 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-14 22:57:42,046 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-14 22:57:42,046 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-14 22:57:42,046 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-14 22:57:42,046 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-14 22:57:42,047 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-14 22:57:42,047 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 22:57:42,047 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-14 22:57:42,047 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-14 22:57:42,047 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-14 22:57:42,048 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-14 22:57:42,219 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-14 22:57:42,234 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-14 22:57:42,235 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-14 22:57:42,236 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-14 22:57:42,239 INFO L275 PluginConnector]: CDTParser initialized [2022-02-14 22:57:42,240 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound10.c [2022-02-14 22:57:42,283 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f00be0721/d6c3e5c33f8640269766364b092a87d5/FLAG23adcc09f [2022-02-14 22:57:42,614 INFO L306 CDTParser]: Found 1 translation units. [2022-02-14 22:57:42,614 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound10.c [2022-02-14 22:57:42,618 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f00be0721/d6c3e5c33f8640269766364b092a87d5/FLAG23adcc09f [2022-02-14 22:57:43,056 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f00be0721/d6c3e5c33f8640269766364b092a87d5 [2022-02-14 22:57:43,058 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-14 22:57:43,059 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-14 22:57:43,063 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-14 22:57:43,063 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-14 22:57:43,066 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-14 22:57:43,066 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 10:57:43" (1/1) ... [2022-02-14 22:57:43,067 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52ad3f4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:57:43, skipping insertion in model container [2022-02-14 22:57:43,067 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 10:57:43" (1/1) ... [2022-02-14 22:57:43,071 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-14 22:57:43,082 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-14 22:57:43,186 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/fermat1-ll_unwindbound10.c[535,548] [2022-02-14 22:57:43,199 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 22:57:43,204 INFO L203 MainTranslator]: Completed pre-run [2022-02-14 22:57:43,211 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/fermat1-ll_unwindbound10.c[535,548] [2022-02-14 22:57:43,225 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 22:57:43,235 INFO L208 MainTranslator]: Completed translation [2022-02-14 22:57:43,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:57:43 WrapperNode [2022-02-14 22:57:43,235 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-14 22:57:43,236 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-14 22:57:43,236 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-14 22:57:43,236 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-14 22:57:43,243 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:57:43" (1/1) ... [2022-02-14 22:57:43,243 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:57:43" (1/1) ... [2022-02-14 22:57:43,247 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:57:43" (1/1) ... [2022-02-14 22:57:43,247 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:57:43" (1/1) ... [2022-02-14 22:57:43,250 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:57:43" (1/1) ... [2022-02-14 22:57:43,253 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:57:43" (1/1) ... [2022-02-14 22:57:43,253 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:57:43" (1/1) ... [2022-02-14 22:57:43,254 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-14 22:57:43,255 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-14 22:57:43,255 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-14 22:57:43,255 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-14 22:57:43,256 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:57:43" (1/1) ... [2022-02-14 22:57:43,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 22:57:43,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:57:43,280 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) [2022-02-14 22:57:43,285 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 [2022-02-14 22:57:43,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-14 22:57:43,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-14 22:57:43,312 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-14 22:57:43,312 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-14 22:57:43,312 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-14 22:57:43,312 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-14 22:57:43,312 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-14 22:57:43,312 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-14 22:57:43,312 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-14 22:57:43,312 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-14 22:57:43,312 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-14 22:57:43,312 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-14 22:57:43,313 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-14 22:57:43,313 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-14 22:57:43,313 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-14 22:57:43,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-14 22:57:43,313 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-14 22:57:43,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-14 22:57:43,313 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-14 22:57:43,313 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-14 22:57:43,352 INFO L234 CfgBuilder]: Building ICFG [2022-02-14 22:57:43,353 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-14 22:57:43,455 INFO L275 CfgBuilder]: Performing block encoding [2022-02-14 22:57:43,459 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-14 22:57:43,459 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-02-14 22:57:43,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:57:43 BoogieIcfgContainer [2022-02-14 22:57:43,460 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-14 22:57:43,461 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-14 22:57:43,461 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-14 22:57:43,462 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-14 22:57:43,463 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:57:43" (1/1) ... [2022-02-14 22:57:43,496 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 10:57:43 BasicIcfg [2022-02-14 22:57:43,496 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-14 22:57:43,497 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-14 22:57:43,497 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-14 22:57:43,500 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-14 22:57:43,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 10:57:43" (1/4) ... [2022-02-14 22:57:43,501 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40d6022 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 10:57:43, skipping insertion in model container [2022-02-14 22:57:43,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:57:43" (2/4) ... [2022-02-14 22:57:43,501 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40d6022 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 10:57:43, skipping insertion in model container [2022-02-14 22:57:43,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:57:43" (3/4) ... [2022-02-14 22:57:43,501 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40d6022 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.02 10:57:43, skipping insertion in model container [2022-02-14 22:57:43,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 10:57:43" (4/4) ... [2022-02-14 22:57:43,502 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat1-ll_unwindbound10.cJordan [2022-02-14 22:57:43,506 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-14 22:57:43,506 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-14 22:57:43,533 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-14 22:57:43,537 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-02-14 22:57:43,537 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-14 22:57:43,548 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-14 22:57:43,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-14 22:57:43,553 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:57:43,554 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:57:43,558 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:57:43,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:57:43,562 INFO L85 PathProgramCache]: Analyzing trace with hash -758992103, now seen corresponding path program 1 times [2022-02-14 22:57:43,568 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:57:43,568 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467956817] [2022-02-14 22:57:43,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:57:43,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:57:43,634 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:57:43,635 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1864838550] [2022-02-14 22:57:43,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:57:43,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:57:43,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:57:43,636 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) [2022-02-14 22:57:43,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-14 22:57:43,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:57:43,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 1 conjunts are in the unsatisfiable core [2022-02-14 22:57:43,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:57:43,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-14 22:57:43,779 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 22:57:43,779 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:57:43,780 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467956817] [2022-02-14 22:57:43,780 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:57:43,781 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864838550] [2022-02-14 22:57:43,781 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864838550] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 22:57:43,781 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 22:57:43,781 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-02-14 22:57:43,783 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983132526] [2022-02-14 22:57:43,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 22:57:43,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-02-14 22:57:43,786 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:57:43,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-02-14 22:57:43,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-02-14 22:57:43,810 INFO L87 Difference]: Start difference. First operand has 37 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-14 22:57:43,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:57:43,823 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2022-02-14 22:57:43,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-02-14 22:57:43,824 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-02-14 22:57:43,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:57:43,831 INFO L225 Difference]: With dead ends: 37 [2022-02-14 22:57:43,831 INFO L226 Difference]: Without dead ends: 32 [2022-02-14 22:57:43,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-02-14 22:57:43,836 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 22:57:43,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 22:57:43,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-02-14 22:57:43,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-02-14 22:57:43,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-14 22:57:43,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-02-14 22:57:43,879 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 22 [2022-02-14 22:57:43,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:57:43,880 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-02-14 22:57:43,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-14 22:57:43,880 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-02-14 22:57:43,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-14 22:57:43,881 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:57:43,882 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:57:43,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-14 22:57:44,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-02-14 22:57:44,089 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:57:44,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:57:44,090 INFO L85 PathProgramCache]: Analyzing trace with hash -713449777, now seen corresponding path program 1 times [2022-02-14 22:57:44,090 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:57:44,090 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098698006] [2022-02-14 22:57:44,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:57:44,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:57:44,100 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:57:44,101 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [902779836] [2022-02-14 22:57:44,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:57:44,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:57:44,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:57:44,105 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) [2022-02-14 22:57:44,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-14 22:57:44,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:57:44,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-14 22:57:44,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:57:44,243 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 22:57:44,243 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 22:57:44,243 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:57:44,243 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098698006] [2022-02-14 22:57:44,243 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:57:44,243 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902779836] [2022-02-14 22:57:44,244 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902779836] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 22:57:44,244 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 22:57:44,244 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-14 22:57:44,244 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697813377] [2022-02-14 22:57:44,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 22:57:44,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-14 22:57:44,245 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:57:44,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-14 22:57:44,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-14 22:57:44,245 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-14 22:57:44,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:57:44,271 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2022-02-14 22:57:44,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-14 22:57:44,272 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-02-14 22:57:44,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:57:44,272 INFO L225 Difference]: With dead ends: 34 [2022-02-14 22:57:44,272 INFO L226 Difference]: Without dead ends: 34 [2022-02-14 22:57:44,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-14 22:57:44,273 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 22:57:44,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 101 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 22:57:44,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-02-14 22:57:44,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-02-14 22:57:44,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-14 22:57:44,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2022-02-14 22:57:44,278 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 23 [2022-02-14 22:57:44,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:57:44,278 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2022-02-14 22:57:44,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-14 22:57:44,279 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2022-02-14 22:57:44,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-14 22:57:44,279 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:57:44,279 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:57:44,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-14 22:57:44,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-02-14 22:57:44,482 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:57:44,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:57:44,483 INFO L85 PathProgramCache]: Analyzing trace with hash -712377301, now seen corresponding path program 1 times [2022-02-14 22:57:44,483 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:57:44,483 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154072630] [2022-02-14 22:57:44,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:57:44,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:57:44,491 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:57:44,492 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [740640964] [2022-02-14 22:57:44,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:57:44,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:57:44,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:57:44,493 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) [2022-02-14 22:57:44,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-14 22:57:44,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:57:44,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-14 22:57:44,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:57:45,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 22:57:45,490 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 22:57:45,491 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:57:45,491 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154072630] [2022-02-14 22:57:45,491 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:57:45,491 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740640964] [2022-02-14 22:57:45,491 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740640964] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 22:57:45,491 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 22:57:45,491 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-14 22:57:45,492 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343786572] [2022-02-14 22:57:45,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 22:57:45,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-14 22:57:45,492 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:57:45,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-14 22:57:45,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-14 22:57:45,493 INFO L87 Difference]: Start difference. First operand 34 states and 43 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-14 22:57:48,562 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 [] [2022-02-14 22:57:48,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:57:48,583 INFO L93 Difference]: Finished difference Result 51 states and 68 transitions. [2022-02-14 22:57:48,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 22:57:48,583 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2022-02-14 22:57:48,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:57:48,584 INFO L225 Difference]: With dead ends: 51 [2022-02-14 22:57:48,585 INFO L226 Difference]: Without dead ends: 51 [2022-02-14 22:57:48,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-14 22:57:48,586 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 16 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-02-14 22:57:48,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 126 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2022-02-14 22:57:48,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-02-14 22:57:48,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-02-14 22:57:48,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 35 states have internal predecessors, (47), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-14 22:57:48,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 67 transitions. [2022-02-14 22:57:48,592 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 67 transitions. Word has length 23 [2022-02-14 22:57:48,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:57:48,592 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 67 transitions. [2022-02-14 22:57:48,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-14 22:57:48,592 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 67 transitions. [2022-02-14 22:57:48,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-14 22:57:48,593 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:57:48,593 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:57:48,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-14 22:57:48,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:57:48,817 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:57:48,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:57:48,817 INFO L85 PathProgramCache]: Analyzing trace with hash 740915101, now seen corresponding path program 1 times [2022-02-14 22:57:48,817 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:57:48,817 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98659568] [2022-02-14 22:57:48,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:57:48,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:57:48,825 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:57:48,825 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2087913376] [2022-02-14 22:57:48,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:57:48,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:57:48,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:57:48,826 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) [2022-02-14 22:57:48,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-14 22:57:48,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:57:48,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-14 22:57:48,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:57:48,999 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 22:57:48,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:57:49,179 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 22:57:49,179 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:57:49,179 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98659568] [2022-02-14 22:57:49,179 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:57:49,180 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087913376] [2022-02-14 22:57:49,180 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087913376] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 22:57:49,180 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 22:57:49,180 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-02-14 22:57:49,180 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868895125] [2022-02-14 22:57:49,181 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 22:57:49,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-14 22:57:49,182 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:57:49,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-14 22:57:49,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-02-14 22:57:49,183 INFO L87 Difference]: Start difference. First operand 50 states and 67 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-14 22:57:49,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:57:49,272 INFO L93 Difference]: Finished difference Result 55 states and 71 transitions. [2022-02-14 22:57:49,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-14 22:57:49,273 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 29 [2022-02-14 22:57:49,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:57:49,277 INFO L225 Difference]: With dead ends: 55 [2022-02-14 22:57:49,277 INFO L226 Difference]: Without dead ends: 52 [2022-02-14 22:57:49,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-02-14 22:57:49,283 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 37 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 22:57:49,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 157 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 22:57:49,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-02-14 22:57:49,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 36. [2022-02-14 22:57:49,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 8 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-14 22:57:49,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2022-02-14 22:57:49,292 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 29 [2022-02-14 22:57:49,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:57:49,292 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2022-02-14 22:57:49,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-14 22:57:49,292 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2022-02-14 22:57:49,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-14 22:57:49,293 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:57:49,293 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:57:49,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-14 22:57:49,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:57:49,507 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:57:49,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:57:49,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1345250901, now seen corresponding path program 1 times [2022-02-14 22:57:49,508 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:57:49,508 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378312972] [2022-02-14 22:57:49,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:57:49,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:57:49,516 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:57:49,516 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [329975763] [2022-02-14 22:57:49,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:57:49,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:57:49,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:57:49,517 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) [2022-02-14 22:57:49,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-14 22:57:49,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:57:49,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-14 22:57:49,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:57:49,644 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 22:57:49,644 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 22:57:49,644 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:57:49,644 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378312972] [2022-02-14 22:57:49,645 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:57:49,645 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329975763] [2022-02-14 22:57:49,645 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329975763] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 22:57:49,645 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 22:57:49,645 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-14 22:57:49,645 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637111371] [2022-02-14 22:57:49,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 22:57:49,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-14 22:57:49,646 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:57:49,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-14 22:57:49,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-14 22:57:49,646 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-02-14 22:57:49,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:57:49,665 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2022-02-14 22:57:49,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 22:57:49,666 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 35 [2022-02-14 22:57:49,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:57:49,666 INFO L225 Difference]: With dead ends: 44 [2022-02-14 22:57:49,666 INFO L226 Difference]: Without dead ends: 44 [2022-02-14 22:57:49,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-14 22:57:49,667 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 6 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 22:57:49,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 120 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 22:57:49,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-02-14 22:57:49,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-02-14 22:57:49,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 9 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-14 22:57:49,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2022-02-14 22:57:49,671 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 35 [2022-02-14 22:57:49,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:57:49,671 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2022-02-14 22:57:49,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-02-14 22:57:49,671 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2022-02-14 22:57:49,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-14 22:57:49,672 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:57:49,672 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:57:49,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-14 22:57:49,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:57:49,877 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:57:49,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:57:49,878 INFO L85 PathProgramCache]: Analyzing trace with hash -516919762, now seen corresponding path program 1 times [2022-02-14 22:57:49,878 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:57:49,878 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449399893] [2022-02-14 22:57:49,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:57:49,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:57:49,885 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:57:49,885 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [546596475] [2022-02-14 22:57:49,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:57:49,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:57:49,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:57:49,886 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) [2022-02-14 22:57:49,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-14 22:57:49,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:57:49,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-14 22:57:49,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:57:49,995 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 22:57:49,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:57:50,080 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-02-14 22:57:50,081 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:57:50,081 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449399893] [2022-02-14 22:57:50,081 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:57:50,081 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546596475] [2022-02-14 22:57:50,081 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546596475] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-14 22:57:50,081 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-14 22:57:50,081 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-02-14 22:57:50,081 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738681025] [2022-02-14 22:57:50,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 22:57:50,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-14 22:57:50,082 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:57:50,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-14 22:57:50,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-14 22:57:50,082 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-02-14 22:57:50,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:57:50,110 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2022-02-14 22:57:50,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-14 22:57:50,111 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2022-02-14 22:57:50,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:57:50,111 INFO L225 Difference]: With dead ends: 53 [2022-02-14 22:57:50,111 INFO L226 Difference]: Without dead ends: 53 [2022-02-14 22:57:50,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-14 22:57:50,112 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 28 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 22:57:50,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 112 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 22:57:50,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-02-14 22:57:50,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2022-02-14 22:57:50,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-14 22:57:50,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2022-02-14 22:57:50,116 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 41 [2022-02-14 22:57:50,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:57:50,116 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2022-02-14 22:57:50,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-02-14 22:57:50,116 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2022-02-14 22:57:50,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-14 22:57:50,117 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:57:50,117 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:57:50,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-14 22:57:50,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:57:50,328 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:57:50,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:57:50,328 INFO L85 PathProgramCache]: Analyzing trace with hash -61650990, now seen corresponding path program 1 times [2022-02-14 22:57:50,328 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:57:50,328 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069966572] [2022-02-14 22:57:50,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:57:50,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:57:50,335 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:57:50,335 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2083034745] [2022-02-14 22:57:50,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:57:50,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:57:50,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:57:50,339 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) [2022-02-14 22:57:50,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-14 22:57:50,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:57:50,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-14 22:57:50,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:57:50,463 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 22:57:50,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:57:50,565 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-02-14 22:57:50,565 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:57:50,565 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069966572] [2022-02-14 22:57:50,565 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:57:50,566 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083034745] [2022-02-14 22:57:50,566 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083034745] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 22:57:50,566 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 22:57:50,566 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-02-14 22:57:50,566 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822035257] [2022-02-14 22:57:50,566 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 22:57:50,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-14 22:57:50,566 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:57:50,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-14 22:57:50,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-14 22:57:50,567 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 8 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) [2022-02-14 22:57:50,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:57:50,677 INFO L93 Difference]: Finished difference Result 108 states and 129 transitions. [2022-02-14 22:57:50,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-14 22:57:50,678 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 8 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) Word has length 43 [2022-02-14 22:57:50,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:57:50,678 INFO L225 Difference]: With dead ends: 108 [2022-02-14 22:57:50,678 INFO L226 Difference]: Without dead ends: 108 [2022-02-14 22:57:50,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-02-14 22:57:50,679 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 81 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 22:57:50,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 224 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 22:57:50,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-02-14 22:57:50,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 95. [2022-02-14 22:57:50,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 68 states have (on average 1.2205882352941178) internal successors, (83), 69 states have internal predecessors, (83), 18 states have call successors, (18), 10 states have call predecessors, (18), 8 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-14 22:57:50,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 117 transitions. [2022-02-14 22:57:50,686 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 117 transitions. Word has length 43 [2022-02-14 22:57:50,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:57:50,686 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 117 transitions. [2022-02-14 22:57:50,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 8 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) [2022-02-14 22:57:50,686 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 117 transitions. [2022-02-14 22:57:50,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-14 22:57:50,687 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:57:50,687 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:57:50,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-14 22:57:50,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:57:50,888 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:57:50,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:57:50,888 INFO L85 PathProgramCache]: Analyzing trace with hash 468355249, now seen corresponding path program 1 times [2022-02-14 22:57:50,888 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:57:50,888 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026486643] [2022-02-14 22:57:50,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:57:50,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:57:50,895 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:57:50,895 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1564463897] [2022-02-14 22:57:50,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:57:50,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:57:50,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:57:50,896 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) [2022-02-14 22:57:50,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-14 22:57:50,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:57:50,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 3 conjunts are in the unsatisfiable core [2022-02-14 22:57:50,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:57:51,003 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-02-14 22:57:51,004 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 22:57:51,004 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:57:51,004 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026486643] [2022-02-14 22:57:51,004 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:57:51,004 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564463897] [2022-02-14 22:57:51,004 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564463897] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 22:57:51,004 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 22:57:51,004 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-14 22:57:51,004 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97254232] [2022-02-14 22:57:51,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 22:57:51,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-14 22:57:51,005 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:57:51,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-14 22:57:51,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-14 22:57:51,005 INFO L87 Difference]: Start difference. First operand 95 states and 117 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-02-14 22:57:51,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:57:51,025 INFO L93 Difference]: Finished difference Result 119 states and 152 transitions. [2022-02-14 22:57:51,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-14 22:57:51,025 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 47 [2022-02-14 22:57:51,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:57:51,027 INFO L225 Difference]: With dead ends: 119 [2022-02-14 22:57:51,027 INFO L226 Difference]: Without dead ends: 119 [2022-02-14 22:57:51,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-14 22:57:51,027 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 23 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 22:57:51,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 98 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 22:57:51,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-02-14 22:57:51,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 109. [2022-02-14 22:57:51,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 79 states have (on average 1.2278481012658229) internal successors, (97), 80 states have internal predecessors, (97), 21 states have call successors, (21), 10 states have call predecessors, (21), 8 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-02-14 22:57:51,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 137 transitions. [2022-02-14 22:57:51,034 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 137 transitions. Word has length 47 [2022-02-14 22:57:51,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:57:51,034 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 137 transitions. [2022-02-14 22:57:51,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-02-14 22:57:51,034 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 137 transitions. [2022-02-14 22:57:51,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-02-14 22:57:51,035 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:57:51,035 INFO L514 BasicCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:57:51,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-14 22:57:51,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-02-14 22:57:51,239 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:57:51,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:57:51,240 INFO L85 PathProgramCache]: Analyzing trace with hash -763492839, now seen corresponding path program 1 times [2022-02-14 22:57:51,240 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:57:51,240 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127512931] [2022-02-14 22:57:51,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:57:51,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:57:51,246 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:57:51,246 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1332955634] [2022-02-14 22:57:51,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:57:51,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:57:51,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:57:51,247 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) [2022-02-14 22:57:51,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-14 22:57:51,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:57:51,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-14 22:57:51,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:57:51,389 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 22:57:51,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:57:51,475 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-02-14 22:57:51,476 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:57:51,476 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127512931] [2022-02-14 22:57:51,476 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:57:51,476 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332955634] [2022-02-14 22:57:51,476 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332955634] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 22:57:51,476 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 22:57:51,476 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-02-14 22:57:51,478 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838987638] [2022-02-14 22:57:51,478 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 22:57:51,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-14 22:57:51,479 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:57:51,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-14 22:57:51,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-02-14 22:57:51,480 INFO L87 Difference]: Start difference. First operand 109 states and 137 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 10 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (12), 8 states have call predecessors, (12), 9 states have call successors, (12) [2022-02-14 22:57:51,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:57:51,602 INFO L93 Difference]: Finished difference Result 172 states and 213 transitions. [2022-02-14 22:57:51,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-14 22:57:51,603 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 10 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (12), 8 states have call predecessors, (12), 9 states have call successors, (12) Word has length 49 [2022-02-14 22:57:51,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:57:51,605 INFO L225 Difference]: With dead ends: 172 [2022-02-14 22:57:51,605 INFO L226 Difference]: Without dead ends: 172 [2022-02-14 22:57:51,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2022-02-14 22:57:51,606 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 121 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 22:57:51,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 205 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 22:57:51,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-02-14 22:57:51,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 153. [2022-02-14 22:57:51,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 112 states have (on average 1.2410714285714286) internal successors, (139), 113 states have internal predecessors, (139), 30 states have call successors, (30), 12 states have call predecessors, (30), 10 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2022-02-14 22:57:51,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 197 transitions. [2022-02-14 22:57:51,626 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 197 transitions. Word has length 49 [2022-02-14 22:57:51,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:57:51,627 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 197 transitions. [2022-02-14 22:57:51,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 10 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (12), 8 states have call predecessors, (12), 9 states have call successors, (12) [2022-02-14 22:57:51,627 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 197 transitions. [2022-02-14 22:57:51,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-14 22:57:51,627 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:57:51,627 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:57:51,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-14 22:57:51,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:57:51,828 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:57:51,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:57:51,828 INFO L85 PathProgramCache]: Analyzing trace with hash 2076394588, now seen corresponding path program 1 times [2022-02-14 22:57:51,829 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:57:51,829 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031695785] [2022-02-14 22:57:51,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:57:51,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:57:51,834 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:57:51,835 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [633101536] [2022-02-14 22:57:51,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:57:51,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:57:51,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:57:51,836 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 22:57:51,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-14 22:57:51,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:57:51,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-14 22:57:51,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:57:51,980 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 22:57:51,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:57:52,093 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-02-14 22:57:52,093 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:57:52,093 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031695785] [2022-02-14 22:57:52,093 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:57:52,094 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633101536] [2022-02-14 22:57:52,094 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633101536] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 22:57:52,094 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 22:57:52,094 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-02-14 22:57:52,094 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266970861] [2022-02-14 22:57:52,094 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 22:57:52,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-14 22:57:52,094 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:57:52,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-14 22:57:52,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-02-14 22:57:52,095 INFO L87 Difference]: Start difference. First operand 153 states and 197 transitions. Second operand has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 12 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 10 states have call predecessors, (14), 11 states have call successors, (14) [2022-02-14 22:57:52,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:57:52,275 INFO L93 Difference]: Finished difference Result 206 states and 267 transitions. [2022-02-14 22:57:52,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-14 22:57:52,275 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 12 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 10 states have call predecessors, (14), 11 states have call successors, (14) Word has length 55 [2022-02-14 22:57:52,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:57:52,277 INFO L225 Difference]: With dead ends: 206 [2022-02-14 22:57:52,277 INFO L226 Difference]: Without dead ends: 206 [2022-02-14 22:57:52,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2022-02-14 22:57:52,278 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 204 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 22:57:52,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 245 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 22:57:52,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-02-14 22:57:52,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 198. [2022-02-14 22:57:52,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 145 states have (on average 1.2344827586206897) internal successors, (179), 149 states have internal predecessors, (179), 40 states have call successors, (40), 14 states have call predecessors, (40), 12 states have return successors, (38), 34 states have call predecessors, (38), 38 states have call successors, (38) [2022-02-14 22:57:52,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 257 transitions. [2022-02-14 22:57:52,289 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 257 transitions. Word has length 55 [2022-02-14 22:57:52,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:57:52,289 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 257 transitions. [2022-02-14 22:57:52,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 12 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 10 states have call predecessors, (14), 11 states have call successors, (14) [2022-02-14 22:57:52,289 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 257 transitions. [2022-02-14 22:57:52,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-02-14 22:57:52,291 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:57:52,291 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:57:52,308 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-02-14 22:57:52,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-02-14 22:57:52,491 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:57:52,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:57:52,492 INFO L85 PathProgramCache]: Analyzing trace with hash -725338187, now seen corresponding path program 1 times [2022-02-14 22:57:52,492 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:57:52,492 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241105652] [2022-02-14 22:57:52,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:57:52,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:57:52,498 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:57:52,498 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2098484176] [2022-02-14 22:57:52,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:57:52,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:57:52,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:57:52,499 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 22:57:52,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-14 22:57:52,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:57:52,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-14 22:57:52,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:57:52,645 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 64 proven. 12 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-02-14 22:57:52,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:57:52,772 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-02-14 22:57:52,772 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:57:52,773 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241105652] [2022-02-14 22:57:52,773 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:57:52,773 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098484176] [2022-02-14 22:57:52,773 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098484176] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 22:57:52,773 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 22:57:52,773 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2022-02-14 22:57:52,773 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125160443] [2022-02-14 22:57:52,773 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 22:57:52,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-14 22:57:52,773 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:57:52,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-14 22:57:52,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-14 22:57:52,774 INFO L87 Difference]: Start difference. First operand 198 states and 257 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-02-14 22:57:52,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:57:52,796 INFO L93 Difference]: Finished difference Result 381 states and 522 transitions. [2022-02-14 22:57:52,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 22:57:52,797 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 91 [2022-02-14 22:57:52,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:57:52,798 INFO L225 Difference]: With dead ends: 381 [2022-02-14 22:57:52,798 INFO L226 Difference]: Without dead ends: 359 [2022-02-14 22:57:52,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-14 22:57:52,799 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 17 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 22:57:52,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 162 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 22:57:52,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-02-14 22:57:52,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 342. [2022-02-14 22:57:52,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 255 states have (on average 1.2666666666666666) internal successors, (323), 261 states have internal predecessors, (323), 74 states have call successors, (74), 14 states have call predecessors, (74), 12 states have return successors, (72), 66 states have call predecessors, (72), 72 states have call successors, (72) [2022-02-14 22:57:52,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 469 transitions. [2022-02-14 22:57:52,808 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 469 transitions. Word has length 91 [2022-02-14 22:57:52,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:57:52,808 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 469 transitions. [2022-02-14 22:57:52,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-02-14 22:57:52,808 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 469 transitions. [2022-02-14 22:57:52,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-02-14 22:57:52,809 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:57:52,810 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:57:52,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-14 22:57:53,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-02-14 22:57:53,023 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:57:53,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:57:53,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1986043633, now seen corresponding path program 2 times [2022-02-14 22:57:53,024 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:57:53,024 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925893076] [2022-02-14 22:57:53,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:57:53,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:57:53,030 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:57:53,030 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2093297946] [2022-02-14 22:57:53,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 22:57:53,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:57:53,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:57:53,032 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 22:57:53,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-14 22:57:53,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 22:57:53,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 22:57:53,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-14 22:57:53,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:57:53,252 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 58 proven. 110 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-02-14 22:57:53,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:57:53,405 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 32 proven. 26 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-02-14 22:57:53,405 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:57:53,405 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925893076] [2022-02-14 22:57:53,405 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:57:53,405 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093297946] [2022-02-14 22:57:53,405 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093297946] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 22:57:53,405 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 22:57:53,405 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2022-02-14 22:57:53,405 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285656430] [2022-02-14 22:57:53,405 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 22:57:53,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-14 22:57:53,406 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:57:53,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-14 22:57:53,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-02-14 22:57:53,406 INFO L87 Difference]: Start difference. First operand 342 states and 469 transitions. Second operand has 14 states, 14 states have (on average 6.785714285714286) internal successors, (95), 14 states have internal predecessors, (95), 12 states have call successors, (24), 10 states have call predecessors, (24), 10 states have return successors, (22), 11 states have call predecessors, (22), 12 states have call successors, (22) [2022-02-14 22:57:53,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:57:53,585 INFO L93 Difference]: Finished difference Result 352 states and 468 transitions. [2022-02-14 22:57:53,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-14 22:57:53,585 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.785714285714286) internal successors, (95), 14 states have internal predecessors, (95), 12 states have call successors, (24), 10 states have call predecessors, (24), 10 states have return successors, (22), 11 states have call predecessors, (22), 12 states have call successors, (22) Word has length 91 [2022-02-14 22:57:53,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:57:53,587 INFO L225 Difference]: With dead ends: 352 [2022-02-14 22:57:53,587 INFO L226 Difference]: Without dead ends: 352 [2022-02-14 22:57:53,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=166, Invalid=296, Unknown=0, NotChecked=0, Total=462 [2022-02-14 22:57:53,587 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 123 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 22:57:53,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 259 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 22:57:53,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-02-14 22:57:53,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 348. [2022-02-14 22:57:53,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 263 states have (on average 1.2243346007604563) internal successors, (322), 263 states have internal predecessors, (322), 72 states have call successors, (72), 14 states have call predecessors, (72), 12 states have return successors, (70), 70 states have call predecessors, (70), 70 states have call successors, (70) [2022-02-14 22:57:53,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 464 transitions. [2022-02-14 22:57:53,595 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 464 transitions. Word has length 91 [2022-02-14 22:57:53,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:57:53,595 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 464 transitions. [2022-02-14 22:57:53,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.785714285714286) internal successors, (95), 14 states have internal predecessors, (95), 12 states have call successors, (24), 10 states have call predecessors, (24), 10 states have return successors, (22), 11 states have call predecessors, (22), 12 states have call successors, (22) [2022-02-14 22:57:53,596 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 464 transitions. [2022-02-14 22:57:53,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-02-14 22:57:53,597 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:57:53,597 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:57:53,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-14 22:57:53,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-02-14 22:57:53,811 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:57:53,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:57:53,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1282125772, now seen corresponding path program 1 times [2022-02-14 22:57:53,812 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:57:53,812 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762289236] [2022-02-14 22:57:53,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:57:53,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:57:53,818 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:57:53,818 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1392456065] [2022-02-14 22:57:53,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:57:53,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:57:53,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:57:53,820 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 22:57:53,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-14 22:57:53,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:57:53,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-14 22:57:53,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:57:54,048 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 22 proven. 190 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 22:57:54,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:57:54,210 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 22 proven. 46 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-02-14 22:57:54,210 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:57:54,210 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762289236] [2022-02-14 22:57:54,210 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:57:54,210 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392456065] [2022-02-14 22:57:54,211 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392456065] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 22:57:54,211 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 22:57:54,211 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2022-02-14 22:57:54,211 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976011540] [2022-02-14 22:57:54,211 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 22:57:54,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-14 22:57:54,211 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:57:54,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-14 22:57:54,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-02-14 22:57:54,212 INFO L87 Difference]: Start difference. First operand 348 states and 464 transitions. Second operand has 13 states, 13 states have (on average 5.6923076923076925) internal successors, (74), 13 states have internal predecessors, (74), 12 states have call successors, (25), 12 states have call predecessors, (25), 11 states have return successors, (23), 10 states have call predecessors, (23), 11 states have call successors, (23) [2022-02-14 22:57:54,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:57:54,388 INFO L93 Difference]: Finished difference Result 350 states and 461 transitions. [2022-02-14 22:57:54,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-14 22:57:54,389 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.6923076923076925) internal successors, (74), 13 states have internal predecessors, (74), 12 states have call successors, (25), 12 states have call predecessors, (25), 11 states have return successors, (23), 10 states have call predecessors, (23), 11 states have call successors, (23) Word has length 97 [2022-02-14 22:57:54,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:57:54,390 INFO L225 Difference]: With dead ends: 350 [2022-02-14 22:57:54,391 INFO L226 Difference]: Without dead ends: 346 [2022-02-14 22:57:54,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2022-02-14 22:57:54,391 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 132 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 22:57:54,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 225 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 22:57:54,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2022-02-14 22:57:54,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 346. [2022-02-14 22:57:54,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 261 states have (on average 1.1992337164750957) internal successors, (313), 261 states have internal predecessors, (313), 72 states have call successors, (72), 14 states have call predecessors, (72), 12 states have return successors, (70), 70 states have call predecessors, (70), 70 states have call successors, (70) [2022-02-14 22:57:54,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 455 transitions. [2022-02-14 22:57:54,401 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 455 transitions. Word has length 97 [2022-02-14 22:57:54,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:57:54,401 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 455 transitions. [2022-02-14 22:57:54,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.6923076923076925) internal successors, (74), 13 states have internal predecessors, (74), 12 states have call successors, (25), 12 states have call predecessors, (25), 11 states have return successors, (23), 10 states have call predecessors, (23), 11 states have call successors, (23) [2022-02-14 22:57:54,401 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 455 transitions. [2022-02-14 22:57:54,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-02-14 22:57:54,402 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:57:54,402 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:57:54,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-14 22:57:54,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-02-14 22:57:54,615 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:57:54,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:57:54,616 INFO L85 PathProgramCache]: Analyzing trace with hash -708686281, now seen corresponding path program 1 times [2022-02-14 22:57:54,616 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:57:54,616 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505608119] [2022-02-14 22:57:54,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:57:54,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:57:54,640 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:57:54,641 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1008031575] [2022-02-14 22:57:54,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:57:54,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:57:54,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:57:54,642 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 22:57:54,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-14 22:57:54,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-14 22:57:54,792 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-02-14 22:57:54,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-14 22:57:54,847 INFO L138 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-02-14 22:57:54,848 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-02-14 22:57:54,848 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-14 22:57:54,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-02-14 22:57:55,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:57:55,054 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:57:55,056 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-14 22:57:55,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.02 10:57:55 BasicIcfg [2022-02-14 22:57:55,093 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-14 22:57:55,093 INFO L158 Benchmark]: Toolchain (without parser) took 12034.42ms. Allocated memory was 180.4MB in the beginning and 217.1MB in the end (delta: 36.7MB). Free memory was 131.9MB in the beginning and 180.2MB in the end (delta: -48.3MB). There was no memory consumed. Max. memory is 8.0GB. [2022-02-14 22:57:55,093 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 180.4MB. Free memory is still 148.3MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-14 22:57:55,093 INFO L158 Benchmark]: CACSL2BoogieTranslator took 172.33ms. Allocated memory is still 180.4MB. Free memory was 131.6MB in the beginning and 157.4MB in the end (delta: -25.8MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-02-14 22:57:55,094 INFO L158 Benchmark]: Boogie Preprocessor took 18.43ms. Allocated memory is still 180.4MB. Free memory was 157.4MB in the beginning and 155.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-14 22:57:55,094 INFO L158 Benchmark]: RCFGBuilder took 205.67ms. Allocated memory is still 180.4MB. Free memory was 155.8MB in the beginning and 144.3MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-02-14 22:57:55,094 INFO L158 Benchmark]: IcfgTransformer took 35.38ms. Allocated memory is still 180.4MB. Free memory was 143.8MB in the beginning and 142.7MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-14 22:57:55,094 INFO L158 Benchmark]: TraceAbstraction took 11595.57ms. Allocated memory was 180.4MB in the beginning and 217.1MB in the end (delta: 36.7MB). Free memory was 142.2MB in the beginning and 180.2MB in the end (delta: -38.0MB). There was no memory consumed. Max. memory is 8.0GB. [2022-02-14 22:57:55,095 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 180.4MB. Free memory is still 148.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 172.33ms. Allocated memory is still 180.4MB. Free memory was 131.6MB in the beginning and 157.4MB in the end (delta: -25.8MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * Boogie Preprocessor took 18.43ms. Allocated memory is still 180.4MB. Free memory was 157.4MB in the beginning and 155.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 205.67ms. Allocated memory is still 180.4MB. Free memory was 155.8MB in the beginning and 144.3MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 35.38ms. Allocated memory is still 180.4MB. Free memory was 143.8MB in the beginning and 142.7MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 11595.57ms. Allocated memory was 180.4MB in the beginning and 217.1MB in the end (delta: 36.7MB). Free memory was 142.2MB in the beginning and 180.2MB in the end (delta: -38.0MB). There was no memory consumed. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int counter = 0; VAL [\old(counter)=14, counter=0] [L21] int A, R; [L22] long long u, v, r; [L23] A = __VERIFIER_nondet_int() [L24] R = __VERIFIER_nondet_int() [L25] CALL assume_abort_if_not((((long long) R - 1) * ((long long) R - 1)) < A) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L25] RET assume_abort_if_not((((long long) R - 1) * ((long long) R - 1)) < A) VAL [\old(counter)=0, A=7, counter=0, R=2] [L27] CALL assume_abort_if_not(A % 2 == 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L27] RET assume_abort_if_not(A % 2 == 1) VAL [\old(counter)=0, A=7, counter=0, R=2] [L29] u = ((long long) 2 * R) + 1 [L30] v = 1 [L31] r = ((long long) R * R) - A VAL [\old(counter)=0, A=7, counter=0, r=-3, R=2, u=5, v=1] [L34] EXPR counter++ VAL [\old(counter)=0, A=7, counter=1, counter++=0, R=2, r=-3, u=5, v=1] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=7, counter=1, R=2, r=-3, u=5, v=1] [L36] COND FALSE !(!(r != 0)) VAL [\old(counter)=0, A=7, counter=1, r=-3, R=2, u=5, v=1] [L39] EXPR counter++ VAL [\old(counter)=0, A=7, counter=2, counter++=1, R=2, r=-3, u=5, v=1] [L39] COND TRUE counter++<10 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=7, counter=2, R=2, r=-3, u=5, v=1] [L41] COND TRUE !(r > 0) VAL [\old(counter)=0, A=7, counter=2, r=-3, R=2, u=5, v=1] [L47] EXPR counter++ VAL [\old(counter)=0, A=7, counter=3, counter++=2, r=-3, R=2, u=5, v=1] [L47] COND TRUE counter++<10 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=7, counter=3, R=2, r=-3, u=5, v=1] [L49] COND FALSE !(!(r < 0)) [L51] r = r + u [L52] u = u + 2 VAL [\old(counter)=0, A=7, counter=3, r=2, R=2, u=7, v=1] [L47] EXPR counter++ VAL [\old(counter)=0, A=7, counter=4, counter++=3, r=2, R=2, u=7, v=1] [L47] COND TRUE counter++<10 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=7, counter=4, r=2, R=2, u=7, v=1] [L49] COND TRUE !(r < 0) VAL [\old(counter)=0, A=7, counter=4, R=2, r=2, u=7, v=1] [L34] EXPR counter++ VAL [\old(counter)=0, A=7, counter=5, counter++=4, r=2, R=2, u=7, v=1] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=7, counter=5, R=2, r=2, u=7, v=1] [L36] COND FALSE !(!(r != 0)) VAL [\old(counter)=0, A=7, counter=5, R=2, r=2, u=7, v=1] [L39] EXPR counter++ VAL [\old(counter)=0, A=7, counter=6, counter++=5, r=2, R=2, u=7, v=1] [L39] COND TRUE counter++<10 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=6] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=6] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=7, counter=6, R=2, r=2, u=7, v=1] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [\old(counter)=0, A=7, counter=6, R=2, r=1, u=7, v=3] [L39] EXPR counter++ VAL [\old(counter)=0, A=7, counter=7, counter++=6, r=1, R=2, u=7, v=3] [L39] COND TRUE counter++<10 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=7] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=7] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=7, counter=7, R=2, r=1, u=7, v=3] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [\old(counter)=0, A=7, counter=7, R=2, r=-2, u=7, v=5] [L39] EXPR counter++ VAL [\old(counter)=0, A=7, counter=8, counter++=7, r=-2, R=2, u=7, v=5] [L39] COND TRUE counter++<10 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=8] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=8] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=7, counter=8, r=-2, R=2, u=7, v=5] [L41] COND TRUE !(r > 0) VAL [\old(counter)=0, A=7, counter=8, R=2, r=-2, u=7, v=5] [L47] EXPR counter++ VAL [\old(counter)=0, A=7, counter=9, counter++=8, r=-2, R=2, u=7, v=5] [L47] COND TRUE counter++<10 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=9] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=9] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=7, counter=9, r=-2, R=2, u=7, v=5] [L49] COND FALSE !(!(r < 0)) [L51] r = r + u [L52] u = u + 2 VAL [\old(counter)=0, A=7, counter=9, r=5, R=2, u=9, v=5] [L47] EXPR counter++ VAL [\old(counter)=0, A=7, counter=10, counter++=9, r=5, R=2, u=9, v=5] [L47] COND TRUE counter++<10 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=10] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=10] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=7, counter=10, R=2, r=5, u=9, v=5] [L49] COND TRUE !(r < 0) VAL [\old(counter)=0, A=7, counter=10, R=2, r=5, u=9, v=5] [L34] EXPR counter++ VAL [\old(counter)=0, A=7, counter=11, counter++=10, R=2, r=5, u=9, v=5] [L34] COND FALSE !(counter++<10) [L56] CALL __VERIFIER_assert(((long long) 4*A) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=0, \old(counter)=0, counter=11] [L12] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=11] [L14] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=11] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 11.5s, OverallIterations: 14, TraceHistogramMax: 11, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 4.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 799 SdHoareTripleChecker+Valid, 3.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 788 mSDsluCounter, 2080 SdHoareTripleChecker+Invalid, 3.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1467 mSDsCounter, 453 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 731 IncrementalHoareTripleChecker+Invalid, 1185 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 453 mSolverCounterUnsat, 613 mSDtfsCounter, 731 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1164 GetRequests, 1044 SyntacticMatches, 4 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=348occurred in iteration=12, InterpolantAutomatonStates: 128, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 13 MinimizatonAttempts, 89 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.3s InterpolantComputationTime, 749 NumberOfCodeBlocks, 749 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 1121 ConstructedInterpolants, 0 QuantifiedInterpolants, 2555 SizeOfPredicates, 47 NumberOfNonLiveVariables, 1931 ConjunctsInSsa, 127 ConjunctsInUnsatCore, 21 InterpolantComputations, 6 PerfectInterpolantSequences, 934/1396 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-02-14 22:57:55,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...