/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/lcm1_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 18:52:03,980 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 18:52:03,982 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 18:52:04,004 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-23 18:52:04,004 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-23 18:52:04,005 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-23 18:52:04,006 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-23 18:52:04,007 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-23 18:52:04,008 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-23 18:52:04,009 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-23 18:52:04,010 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-23 18:52:04,010 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-23 18:52:04,011 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-23 18:52:04,011 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-23 18:52:04,012 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-23 18:52:04,013 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-23 18:52:04,013 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-23 18:52:04,014 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-23 18:52:04,015 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-23 18:52:04,016 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-23 18:52:04,017 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-23 18:52:04,017 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-23 18:52:04,018 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-23 18:52:04,019 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-23 18:52:04,020 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-23 18:52:04,026 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-23 18:52:04,026 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-23 18:52:04,026 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-23 18:52:04,027 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-23 18:52:04,033 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 18:52:04,034 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 18:52:04,035 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 18:52:04,035 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-23 18:52:04,035 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 18:52:04,035 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-23 18:52:04,035 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 18:52:04,035 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 18:52:04,036 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 18:52:04,036 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 18:52:04,036 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-23 18:52:04,036 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 18:52:04,036 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 18:52:04,036 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 18:52:04,036 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 18:52:04,036 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 18:52:04,037 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-23 18:52:04,037 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 18:52:04,037 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 18:52:04,037 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 18:52:04,037 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 18:52:04,038 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-23 18:52:04,038 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 18:52:04,224 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 18:52:04,251 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 18:52:04,253 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 18:52:04,254 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 18:52:04,254 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 18:52:04,255 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/lcm1_unwindbound100.c [2022-02-23 18:52:04,305 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc7ff1f99/89c6746d8581460981e70b3a124f91fc/FLAG35530a860 [2022-02-23 18:52:04,686 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 18:52:04,686 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/lcm1_unwindbound100.c [2022-02-23 18:52:04,695 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc7ff1f99/89c6746d8581460981e70b3a124f91fc/FLAG35530a860 [2022-02-23 18:52:04,710 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc7ff1f99/89c6746d8581460981e70b3a124f91fc [2022-02-23 18:52:04,712 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 18:52:04,714 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-23 18:52:04,717 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 18:52:04,717 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 18:52:04,719 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 18:52:04,720 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:52:04" (1/1) ... [2022-02-23 18:52:04,721 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4288137f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:52:04, skipping insertion in model container [2022-02-23 18:52:04,721 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:52:04" (1/1) ... [2022-02-23 18:52:04,726 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 18:52:04,738 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 18:52:04,884 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/lcm1_unwindbound100.c[552,565] [2022-02-23 18:52:04,899 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 18:52:04,908 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 18:52:04,919 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/lcm1_unwindbound100.c[552,565] [2022-02-23 18:52:04,934 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 18:52:04,943 INFO L208 MainTranslator]: Completed translation [2022-02-23 18:52:04,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:52:04 WrapperNode [2022-02-23 18:52:04,943 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 18:52:04,944 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 18:52:04,944 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 18:52:04,944 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 18:52:04,951 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:52:04" (1/1) ... [2022-02-23 18:52:04,952 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:52:04" (1/1) ... [2022-02-23 18:52:04,956 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:52:04" (1/1) ... [2022-02-23 18:52:04,956 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:52:04" (1/1) ... [2022-02-23 18:52:04,960 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:52:04" (1/1) ... [2022-02-23 18:52:04,963 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:52:04" (1/1) ... [2022-02-23 18:52:04,963 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:52:04" (1/1) ... [2022-02-23 18:52:04,965 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 18:52:04,965 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 18:52:04,965 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 18:52:04,965 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 18:52:04,972 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:52:04" (1/1) ... [2022-02-23 18:52:04,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 18:52:04,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:52:05,005 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) [2022-02-23 18:52:05,015 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 [2022-02-23 18:52:05,038 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 18:52:05,038 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 18:52:05,038 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 18:52:05,038 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-23 18:52:05,038 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-23 18:52:05,038 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 18:52:05,038 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 18:52:05,038 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 18:52:05,039 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 18:52:05,039 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 18:52:05,039 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-02-23 18:52:05,039 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-23 18:52:05,039 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 18:52:05,039 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 18:52:05,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 18:52:05,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 18:52:05,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 18:52:05,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 18:52:05,039 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 18:52:05,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 18:52:05,092 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 18:52:05,093 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 18:52:05,231 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 18:52:05,235 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 18:52:05,235 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-02-23 18:52:05,237 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:52:05 BoogieIcfgContainer [2022-02-23 18:52:05,237 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 18:52:05,237 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-23 18:52:05,237 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-23 18:52:05,239 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-23 18:52:05,242 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:52:05" (1/1) ... [2022-02-23 18:52:05,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 06:52:05 BasicIcfg [2022-02-23 18:52:05,264 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-23 18:52:05,266 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 18:52:05,266 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 18:52:05,268 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 18:52:05,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 06:52:04" (1/4) ... [2022-02-23 18:52:05,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3712aff5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:52:05, skipping insertion in model container [2022-02-23 18:52:05,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:52:04" (2/4) ... [2022-02-23 18:52:05,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3712aff5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:52:05, skipping insertion in model container [2022-02-23 18:52:05,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:52:05" (3/4) ... [2022-02-23 18:52:05,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3712aff5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 06:52:05, skipping insertion in model container [2022-02-23 18:52:05,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 06:52:05" (4/4) ... [2022-02-23 18:52:05,270 INFO L111 eAbstractionObserver]: Analyzing ICFG lcm1_unwindbound100.cJordan [2022-02-23 18:52:05,274 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-23 18:52:05,274 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 18:52:05,302 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 18:52:05,307 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 [2022-02-23 18:52:05,307 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 18:52:05,316 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-02-23 18:52:05,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-23 18:52:05,322 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:52:05,322 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:52:05,323 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:52:05,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:52:05,326 INFO L85 PathProgramCache]: Analyzing trace with hash -615641025, now seen corresponding path program 1 times [2022-02-23 18:52:05,332 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:52:05,333 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62762339] [2022-02-23 18:52:05,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:52:05,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:52:05,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:52:05,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 18:52:05,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:52:05,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 18:52:05,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:52:05,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-23 18:52:05,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:52:05,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-02-23 18:52:05,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:52:05,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-23 18:52:05,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:52:05,522 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-23 18:52:05,522 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:52:05,523 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62762339] [2022-02-23 18:52:05,523 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62762339] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 18:52:05,523 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 18:52:05,523 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-23 18:52:05,524 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942735672] [2022-02-23 18:52:05,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:52:05,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-23 18:52:05,528 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:52:05,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-23 18:52:05,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 18:52:05,554 INFO L87 Difference]: Start difference. First operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-23 18:52:05,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:52:05,658 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2022-02-23 18:52:05,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-23 18:52:05,660 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2022-02-23 18:52:05,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:52:05,666 INFO L225 Difference]: With dead ends: 41 [2022-02-23 18:52:05,666 INFO L226 Difference]: Without dead ends: 36 [2022-02-23 18:52:05,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 18:52:05,673 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 18:52:05,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 51 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 18:52:05,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-02-23 18:52:05,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2022-02-23 18:52:05,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-23 18:52:05,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 47 transitions. [2022-02-23 18:52:05,700 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 47 transitions. Word has length 32 [2022-02-23 18:52:05,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:52:05,701 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 47 transitions. [2022-02-23 18:52:05,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-23 18:52:05,701 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 47 transitions. [2022-02-23 18:52:05,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-23 18:52:05,702 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:52:05,702 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:52:05,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 18:52:05,702 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:52:05,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:52:05,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1244400054, now seen corresponding path program 1 times [2022-02-23 18:52:05,703 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:52:05,703 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821435378] [2022-02-23 18:52:05,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:52:05,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:52:05,722 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:52:05,722 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [423342051] [2022-02-23 18:52:05,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:52:05,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:52:05,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:52:05,724 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) [2022-02-23 18:52:05,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-23 18:52:05,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:52:05,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-23 18:52:05,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:52:05,923 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-23 18:52:05,923 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 18:52:05,924 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:52:05,924 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821435378] [2022-02-23 18:52:05,924 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:52:05,924 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423342051] [2022-02-23 18:52:05,924 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423342051] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 18:52:05,924 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 18:52:05,924 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 18:52:05,925 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19094193] [2022-02-23 18:52:05,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:52:05,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 18:52:05,926 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:52:05,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 18:52:05,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 18:52:05,926 INFO L87 Difference]: Start difference. First operand 35 states and 47 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, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-23 18:52:05,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:52:05,940 INFO L93 Difference]: Finished difference Result 37 states and 49 transitions. [2022-02-23 18:52:05,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 18:52:05,941 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, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-02-23 18:52:05,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:52:05,942 INFO L225 Difference]: With dead ends: 37 [2022-02-23 18:52:05,942 INFO L226 Difference]: Without dead ends: 37 [2022-02-23 18:52:05,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 18:52:05,943 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 0 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 115 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 [2022-02-23 18:52:05,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 115 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 18:52:05,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-02-23 18:52:05,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-02-23 18:52:05,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-23 18:52:05,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 49 transitions. [2022-02-23 18:52:05,949 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 49 transitions. Word has length 33 [2022-02-23 18:52:05,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:52:05,950 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 49 transitions. [2022-02-23 18:52:05,950 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, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-23 18:52:05,950 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 49 transitions. [2022-02-23 18:52:05,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-23 18:52:05,951 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:52:05,951 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:52:05,968 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-02-23 18:52:06,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:52:06,175 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:52:06,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:52:06,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1245472530, now seen corresponding path program 1 times [2022-02-23 18:52:06,176 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:52:06,176 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523301336] [2022-02-23 18:52:06,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:52:06,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:52:06,192 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:52:06,192 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [61883136] [2022-02-23 18:52:06,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:52:06,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:52:06,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:52:06,194 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) [2022-02-23 18:52:06,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-23 18:52:06,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:52:06,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-23 18:52:06,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:52:06,352 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-23 18:52:06,352 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 18:52:06,352 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:52:06,352 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523301336] [2022-02-23 18:52:06,352 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:52:06,352 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61883136] [2022-02-23 18:52:06,352 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61883136] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 18:52:06,352 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 18:52:06,352 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 18:52:06,353 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951239191] [2022-02-23 18:52:06,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:52:06,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 18:52:06,353 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:52:06,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 18:52:06,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 18:52:06,354 INFO L87 Difference]: Start difference. First operand 37 states and 49 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-23 18:52:06,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:52:06,404 INFO L93 Difference]: Finished difference Result 55 states and 76 transitions. [2022-02-23 18:52:06,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 18:52:06,405 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2022-02-23 18:52:06,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:52:06,405 INFO L225 Difference]: With dead ends: 55 [2022-02-23 18:52:06,406 INFO L226 Difference]: Without dead ends: 55 [2022-02-23 18:52:06,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-23 18:52:06,406 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 16 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 18:52:06,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 152 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 18:52:06,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-02-23 18:52:06,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2022-02-23 18:52:06,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 35 states have internal predecessors, (47), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-23 18:52:06,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 73 transitions. [2022-02-23 18:52:06,412 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 73 transitions. Word has length 33 [2022-02-23 18:52:06,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:52:06,413 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 73 transitions. [2022-02-23 18:52:06,413 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-23 18:52:06,413 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 73 transitions. [2022-02-23 18:52:06,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-23 18:52:06,413 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:52:06,413 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:52:06,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-23 18:52:06,631 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,SelfDestructingSolverStorable2 [2022-02-23 18:52:06,631 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:52:06,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:52:06,632 INFO L85 PathProgramCache]: Analyzing trace with hash -64495806, now seen corresponding path program 1 times [2022-02-23 18:52:06,632 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:52:06,632 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177557690] [2022-02-23 18:52:06,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:52:06,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:52:06,646 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:52:06,646 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [936407866] [2022-02-23 18:52:06,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:52:06,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:52:06,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:52:06,651 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) [2022-02-23 18:52:06,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process