/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/divbin2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 15:51:57,089 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 15:51:57,091 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 15:51:57,140 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-17 15:51:57,140 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-17 15:51:57,141 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-17 15:51:57,144 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-17 15:51:57,146 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-17 15:51:57,148 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-17 15:51:57,152 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-17 15:51:57,153 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-17 15:51:57,155 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-17 15:51:57,155 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 15:51:57,157 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 15:51:57,158 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 15:51:57,161 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 15:51:57,162 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 15:51:57,162 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 15:51:57,165 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 15:51:57,170 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 15:51:57,171 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 15:51:57,172 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 15:51:57,173 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 15:51:57,174 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 15:51:57,175 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 15:51:57,181 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-17 15:51:57,189 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 15:51:57,190 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 15:51:57,191 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 15:51:57,192 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-17 15:51:57,203 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 15:51:57,203 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 15:51:57,204 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 15:51:57,204 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-17 15:51:57,204 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 15:51:57,205 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-17 15:51:57,205 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 15:51:57,205 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 15:51:57,205 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 15:51:57,206 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 15:51:57,206 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-17 15:51:57,206 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 15:51:57,206 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 15:51:57,206 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 15:51:57,206 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 15:51:57,206 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 15:51:57,207 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-17 15:51:57,207 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 15:51:57,207 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 15:51:57,207 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 15:51:57,207 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 15:51:57,208 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 15:51:57,208 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 15:51:57,405 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 15:51:57,423 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 15:51:57,425 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 15:51:57,427 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 15:51:57,427 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 15:51:57,428 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/divbin2.i [2022-03-17 15:51:57,502 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/102de438d/c64d45a6136d477aad63110b504ec2c1/FLAG421db688c [2022-03-17 15:51:57,859 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 15:51:57,859 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/divbin2.i [2022-03-17 15:51:57,868 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/102de438d/c64d45a6136d477aad63110b504ec2c1/FLAG421db688c [2022-03-17 15:51:57,880 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/102de438d/c64d45a6136d477aad63110b504ec2c1 [2022-03-17 15:51:57,885 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 15:51:57,886 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 15:51:57,891 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 15:51:57,892 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 15:51:57,895 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 15:51:57,896 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 03:51:57" (1/1) ... [2022-03-17 15:51:57,897 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26319aec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:51:57, skipping insertion in model container [2022-03-17 15:51:57,897 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 03:51:57" (1/1) ... [2022-03-17 15:51:57,903 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 15:51:57,915 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 15:51:58,044 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/divbin2.i[951,964] [2022-03-17 15:51:58,056 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 15:51:58,065 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 15:51:58,075 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/divbin2.i[951,964] [2022-03-17 15:51:58,079 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 15:51:58,103 INFO L208 MainTranslator]: Completed translation [2022-03-17 15:51:58,104 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:51:58 WrapperNode [2022-03-17 15:51:58,104 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 15:51:58,105 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 15:51:58,105 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 15:51:58,105 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 15:51:58,119 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:51:58" (1/1) ... [2022-03-17 15:51:58,119 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:51:58" (1/1) ... [2022-03-17 15:51:58,128 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:51:58" (1/1) ... [2022-03-17 15:51:58,128 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:51:58" (1/1) ... [2022-03-17 15:51:58,134 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:51:58" (1/1) ... [2022-03-17 15:51:58,139 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:51:58" (1/1) ... [2022-03-17 15:51:58,140 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:51:58" (1/1) ... [2022-03-17 15:51:58,141 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 15:51:58,142 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 15:51:58,142 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 15:51:58,143 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 15:51:58,143 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:51:58" (1/1) ... [2022-03-17 15:51:58,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 15:51:58,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:51:58,174 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-17 15:51:58,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-17 15:51:58,203 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 15:51:58,204 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 15:51:58,204 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 15:51:58,204 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-17 15:51:58,204 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 15:51:58,204 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 15:51:58,204 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 15:51:58,204 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 15:51:58,204 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-17 15:51:58,205 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-17 15:51:58,205 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 15:51:58,205 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 15:51:58,205 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-17 15:51:58,205 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-17 15:51:58,205 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 15:51:58,205 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 15:51:58,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 15:51:58,206 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 15:51:58,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 15:51:58,206 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 15:51:58,206 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 15:51:58,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 15:51:58,259 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 15:51:58,261 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 15:51:58,384 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 15:51:58,390 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 15:51:58,390 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-17 15:51:58,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 03:51:58 BoogieIcfgContainer [2022-03-17 15:51:58,392 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 15:51:58,393 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 15:51:58,393 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 15:51:58,394 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 15:51:58,397 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 03:51:58" (1/1) ... [2022-03-17 15:51:58,429 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 03:51:58 BasicIcfg [2022-03-17 15:51:58,429 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 15:51:58,433 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 15:51:58,433 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 15:51:58,436 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 15:51:58,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 03:51:57" (1/4) ... [2022-03-17 15:51:58,437 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74b1dd6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 03:51:58, skipping insertion in model container [2022-03-17 15:51:58,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:51:58" (2/4) ... [2022-03-17 15:51:58,437 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74b1dd6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 03:51:58, skipping insertion in model container [2022-03-17 15:51:58,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 03:51:58" (3/4) ... [2022-03-17 15:51:58,452 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74b1dd6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 03:51:58, skipping insertion in model container [2022-03-17 15:51:58,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 03:51:58" (4/4) ... [2022-03-17 15:51:58,454 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2.iJordan [2022-03-17 15:51:58,459 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-17 15:51:58,459 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 15:51:58,506 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 15:51:58,512 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-17 15:51:58,513 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 15:51:58,525 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 15 states have (on average 1.6) internal successors, (24), 16 states have internal predecessors, (24), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-17 15:51:58,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-17 15:51:58,532 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:51:58,533 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:51:58,534 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:51:58,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:51:58,539 INFO L85 PathProgramCache]: Analyzing trace with hash -852214585, now seen corresponding path program 1 times [2022-03-17 15:51:58,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:51:58,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352028761] [2022-03-17 15:51:58,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:51:58,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:51:58,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:58,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:51:58,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:58,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:51:58,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:51:58,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352028761] [2022-03-17 15:51:58,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352028761] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 15:51:58,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 15:51:58,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 15:51:58,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686135735] [2022-03-17 15:51:58,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:51:58,688 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 15:51:58,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:51:58,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 15:51:58,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 15:51:58,713 INFO L87 Difference]: Start difference. First operand has 24 states, 15 states have (on average 1.6) internal successors, (24), 16 states have internal predecessors, (24), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:51:58,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:51:58,749 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2022-03-17 15:51:58,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 15:51:58,752 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-17 15:51:58,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:51:58,758 INFO L225 Difference]: With dead ends: 24 [2022-03-17 15:51:58,758 INFO L226 Difference]: Without dead ends: 19 [2022-03-17 15:51:58,760 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 15:51:58,763 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 16 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 15:51:58,764 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 28 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 15:51:58,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-03-17 15:51:58,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-03-17 15:51:58,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:51:58,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2022-03-17 15:51:58,792 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 12 [2022-03-17 15:51:58,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:51:58,793 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2022-03-17 15:51:58,793 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:51:58,793 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2022-03-17 15:51:58,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-17 15:51:58,793 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:51:58,794 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:51:58,794 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 15:51:58,794 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:51:58,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:51:58,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1209212451, now seen corresponding path program 1 times [2022-03-17 15:51:58,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:51:58,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088763633] [2022-03-17 15:51:58,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:51:58,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:51:58,810 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 15:51:58,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1225721154] [2022-03-17 15:51:58,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:51:58,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:51:58,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:51:58,813 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:51:58,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-17 15:51:58,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:58,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-17 15:51:58,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:51:59,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:51:59,147 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 15:51:59,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:51:59,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088763633] [2022-03-17 15:51:59,148 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 15:51:59,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225721154] [2022-03-17 15:51:59,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225721154] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 15:51:59,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 15:51:59,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-17 15:51:59,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847786672] [2022-03-17 15:51:59,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:51:59,150 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 15:51:59,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:51:59,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 15:51:59,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-17 15:51:59,151 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:51:59,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:51:59,218 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2022-03-17 15:51:59,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 15:51:59,219 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-03-17 15:51:59,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:51:59,221 INFO L225 Difference]: With dead ends: 29 [2022-03-17 15:51:59,222 INFO L226 Difference]: Without dead ends: 28 [2022-03-17 15:51:59,225 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-03-17 15:51:59,226 INFO L912 BasicCegarLoop]: 16 mSDtfsCounter, 9 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 15:51:59,229 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 60 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 15:51:59,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-03-17 15:51:59,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-03-17 15:51:59,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-17 15:51:59,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-03-17 15:51:59,235 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 13 [2022-03-17 15:51:59,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:51:59,238 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-03-17 15:51:59,238 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:51:59,239 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-03-17 15:51:59,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-17 15:51:59,239 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:51:59,239 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:51:59,257 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-17 15:51:59,447 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:51:59,448 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:51:59,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:51:59,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1400683102, now seen corresponding path program 1 times [2022-03-17 15:51:59,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:51:59,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180444316] [2022-03-17 15:51:59,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:51:59,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:51:59,462 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 15:51:59,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [654882196] [2022-03-17 15:51:59,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:51:59,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:51:59,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:51:59,469 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:51:59,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-17 15:51:59,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:59,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-17 15:51:59,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:51:59,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:51:59,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:51:59,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:51:59,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:51:59,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180444316] [2022-03-17 15:51:59,800 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 15:51:59,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654882196] [2022-03-17 15:51:59,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654882196] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 15:51:59,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-17 15:51:59,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 8 [2022-03-17 15:51:59,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257775454] [2022-03-17 15:51:59,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:51:59,801 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 15:51:59,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:51:59,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 15:51:59,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-03-17 15:51:59,802 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:51:59,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:51:59,821 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-03-17 15:51:59,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 15:51:59,822 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-03-17 15:51:59,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:51:59,824 INFO L225 Difference]: With dead ends: 34 [2022-03-17 15:51:59,824 INFO L226 Difference]: Without dead ends: 34 [2022-03-17 15:51:59,825 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-03-17 15:51:59,826 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 15:51:59,826 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 80 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 10 Unchecked, 0.0s Time] [2022-03-17 15:51:59,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-17 15:51:59,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-03-17 15:51:59,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 25 states have internal predecessors, (28), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-17 15:51:59,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-03-17 15:51:59,839 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 15 [2022-03-17 15:51:59,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:51:59,839 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-03-17 15:51:59,839 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:51:59,840 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-03-17 15:51:59,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-17 15:51:59,840 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:51:59,840 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:51:59,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-17 15:52:00,041 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-17 15:52:00,042 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:52:00,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:52:00,042 INFO L85 PathProgramCache]: Analyzing trace with hash 307306426, now seen corresponding path program 1 times [2022-03-17 15:52:00,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:52:00,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777074828] [2022-03-17 15:52:00,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:52:00,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:52:00,054 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 15:52:00,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1579738940] [2022-03-17 15:52:00,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:52:00,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:52:00,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:52:00,058 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:52:00,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-17 15:52:00,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:52:00,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-17 15:52:00,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:52:00,203 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-17 15:52:00,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:52:00,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-17 15:52:00,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:52:00,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777074828] [2022-03-17 15:52:00,339 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 15:52:00,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579738940] [2022-03-17 15:52:00,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579738940] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 15:52:00,339 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 15:52:00,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2022-03-17 15:52:00,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567164267] [2022-03-17 15:52:00,340 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 15:52:00,340 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-17 15:52:00,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:52:00,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-17 15:52:00,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-17 15:52:00,341 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-17 15:52:02,528 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 15:52:04,647 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 15:52:04,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:52:04,835 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2022-03-17 15:52:04,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-17 15:52:04,835 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2022-03-17 15:52:04,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:52:04,836 INFO L225 Difference]: With dead ends: 38 [2022-03-17 15:52:04,836 INFO L226 Difference]: Without dead ends: 33 [2022-03-17 15:52:04,836 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-03-17 15:52:04,837 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 22 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-03-17 15:52:04,837 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 64 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 44 Invalid, 2 Unknown, 0 Unchecked, 4.5s Time] [2022-03-17 15:52:04,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-17 15:52:04,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2022-03-17 15:52:04,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-17 15:52:04,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2022-03-17 15:52:04,841 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 21 [2022-03-17 15:52:04,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:52:04,841 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2022-03-17 15:52:04,841 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-17 15:52:04,841 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2022-03-17 15:52:04,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-17 15:52:04,842 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:52:04,842 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:52:04,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-17 15:52:05,042 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:52:05,043 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:52:05,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:52:05,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1801492333, now seen corresponding path program 1 times [2022-03-17 15:52:05,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:52:05,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554550192] [2022-03-17 15:52:05,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:52:05,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:52:05,052 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 15:52:05,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [660093489] [2022-03-17 15:52:05,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:52:05,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:52:05,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:52:05,054 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:52:05,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-17 15:52:05,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:52:05,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-17 15:52:05,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:52:05,174 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:52:05,175 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 15:52:05,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:52:05,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554550192] [2022-03-17 15:52:05,176 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 15:52:05,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660093489] [2022-03-17 15:52:05,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660093489] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 15:52:05,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 15:52:05,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 15:52:05,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310727499] [2022-03-17 15:52:05,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:52:05,179 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 15:52:05,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:52:05,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 15:52:05,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 15:52:05,180 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:52:05,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:52:05,201 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2022-03-17 15:52:05,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 15:52:05,202 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2022-03-17 15:52:05,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:52:05,202 INFO L225 Difference]: With dead ends: 29 [2022-03-17 15:52:05,202 INFO L226 Difference]: Without dead ends: 26 [2022-03-17 15:52:05,203 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 15:52:05,203 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 15:52:05,204 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 15:52:05,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-03-17 15:52:05,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-03-17 15:52:05,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-17 15:52:05,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2022-03-17 15:52:05,209 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 21 [2022-03-17 15:52:05,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:52:05,209 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2022-03-17 15:52:05,209 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:52:05,210 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2022-03-17 15:52:05,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-17 15:52:05,210 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:52:05,211 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:52:05,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-17 15:52:05,414 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:52:05,415 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:52:05,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:52:05,415 INFO L85 PathProgramCache]: Analyzing trace with hash 108173774, now seen corresponding path program 1 times [2022-03-17 15:52:05,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:52:05,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126944965] [2022-03-17 15:52:05,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:52:05,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:52:05,425 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 15:52:05,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1446958459] [2022-03-17 15:52:05,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:52:05,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:52:05,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:52:05,427 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:52:05,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process