/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 18:15:30,163 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 18:15:30,164 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 18:15:30,189 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-17 18:15:30,190 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-17 18:15:30,191 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-17 18:15:30,192 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-17 18:15:30,196 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-17 18:15:30,198 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-17 18:15:30,201 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-17 18:15:30,202 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-17 18:15:30,203 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-17 18:15:30,203 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 18:15:30,204 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 18:15:30,205 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 18:15:30,207 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 18:15:30,207 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 18:15:30,208 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 18:15:30,210 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 18:15:30,214 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 18:15:30,215 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 18:15:30,216 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 18:15:30,216 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 18:15:30,217 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 18:15:30,218 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 18:15:30,222 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-17 18:15:30,225 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-17 18:15:30,226 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-17 18:15:30,226 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-17 18:15:30,227 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-17 18:15:30,227 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-17 18:15:30,227 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-17 18:15:30,228 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-17 18:15:30,228 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-17 18:15:30,228 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 18:15:30,229 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 18:15:30,230 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 18:15:30,230 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-17 18:15:30,238 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 18:15:30,238 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 18:15:30,239 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 18:15:30,239 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-17 18:15:30,239 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 18:15:30,239 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-17 18:15:30,239 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 18:15:30,239 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 18:15:30,240 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 18:15:30,240 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 18:15:30,240 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-17 18:15:30,240 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 18:15:30,240 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 18:15:30,240 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 18:15:30,240 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 18:15:30,241 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 18:15:30,241 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-17 18:15:30,241 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 18:15:30,241 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 18:15:30,241 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 18:15:30,241 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 18:15:30,241 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 18:15:30,242 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 18:15:30,421 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 18:15:30,442 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 18:15:30,444 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 18:15:30,445 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 18:15:30,445 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 18:15:30,446 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound10.c [2022-03-17 18:15:30,511 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0feae54b6/1202b345f39f400689f5d8351e8b32bf/FLAG4ebee43d8 [2022-03-17 18:15:30,884 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 18:15:30,884 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound10.c [2022-03-17 18:15:30,889 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0feae54b6/1202b345f39f400689f5d8351e8b32bf/FLAG4ebee43d8 [2022-03-17 18:15:30,900 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0feae54b6/1202b345f39f400689f5d8351e8b32bf [2022-03-17 18:15:30,902 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 18:15:30,903 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 18:15:30,904 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 18:15:30,904 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 18:15:30,918 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 18:15:30,919 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 06:15:30" (1/1) ... [2022-03-17 18:15:30,920 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2322f66c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:15:30, skipping insertion in model container [2022-03-17 18:15:30,920 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 06:15:30" (1/1) ... [2022-03-17 18:15:30,925 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 18:15:30,937 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 18:15:31,080 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound10.c[537,550] [2022-03-17 18:15:31,094 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 18:15:31,101 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 18:15:31,110 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound10.c[537,550] [2022-03-17 18:15:31,113 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 18:15:31,124 INFO L208 MainTranslator]: Completed translation [2022-03-17 18:15:31,125 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:15:31 WrapperNode [2022-03-17 18:15:31,125 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 18:15:31,126 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 18:15:31,126 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 18:15:31,126 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 18:15:31,134 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:15:31" (1/1) ... [2022-03-17 18:15:31,135 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:15:31" (1/1) ... [2022-03-17 18:15:31,139 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:15:31" (1/1) ... [2022-03-17 18:15:31,140 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:15:31" (1/1) ... [2022-03-17 18:15:31,143 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:15:31" (1/1) ... [2022-03-17 18:15:31,146 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:15:31" (1/1) ... [2022-03-17 18:15:31,147 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:15:31" (1/1) ... [2022-03-17 18:15:31,148 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 18:15:31,149 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 18:15:31,149 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 18:15:31,149 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 18:15:31,156 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:15:31" (1/1) ... [2022-03-17 18:15:31,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 18:15:31,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 18:15:31,202 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 18:15:31,248 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 18:15:31,270 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 18:15:31,270 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 18:15:31,270 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 18:15:31,271 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-17 18:15:31,271 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 18:15:31,271 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 18:15:31,271 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 18:15:31,272 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 18:15:31,272 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 18:15:31,272 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 18:15:31,272 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-17 18:15:31,272 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-17 18:15:31,272 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 18:15:31,273 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 18:15:31,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 18:15:31,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 18:15:31,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 18:15:31,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 18:15:31,275 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 18:15:31,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 18:15:31,329 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 18:15:31,331 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 18:15:31,486 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 18:15:31,495 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 18:15:31,495 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-17 18:15:31,497 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 06:15:31 BoogieIcfgContainer [2022-03-17 18:15:31,497 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 18:15:31,498 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 18:15:31,498 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 18:15:31,511 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 18:15:31,514 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 06:15:31" (1/1) ... [2022-03-17 18:15:31,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 06:15:31 BasicIcfg [2022-03-17 18:15:31,540 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 18:15:31,549 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 18:15:31,549 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 18:15:31,552 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 18:15:31,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 06:15:30" (1/4) ... [2022-03-17 18:15:31,553 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c18ae88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 06:15:31, skipping insertion in model container [2022-03-17 18:15:31,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:15:31" (2/4) ... [2022-03-17 18:15:31,554 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c18ae88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 06:15:31, skipping insertion in model container [2022-03-17 18:15:31,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 06:15:31" (3/4) ... [2022-03-17 18:15:31,554 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c18ae88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 06:15:31, skipping insertion in model container [2022-03-17 18:15:31,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 06:15:31" (4/4) ... [2022-03-17 18:15:31,555 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_valuebound10.cJordan [2022-03-17 18:15:31,562 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-17 18:15:31,562 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 18:15:31,600 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 18:15:31,606 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 18:15:31,606 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 18:15:31,619 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-17 18:15:31,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-17 18:15:31,626 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:15:31,627 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:15:31,627 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:15:31,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:15:31,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1656134296, now seen corresponding path program 1 times [2022-03-17 18:15:31,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:15:31,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912730837] [2022-03-17 18:15:31,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:15:31,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:15:31,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:15:31,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 18:15:31,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:15:31,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 18:15:31,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:15:31,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-17 18:15:31,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:15:31,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-17 18:15:31,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:15:31,826 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 18:15:31,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:15:31,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912730837] [2022-03-17 18:15:31,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912730837] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 18:15:31,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 18:15:31,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 18:15:31,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499510454] [2022-03-17 18:15:31,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 18:15:31,833 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 18:15:31,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:15:31,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 18:15:31,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 18:15:31,862 INFO L87 Difference]: Start difference. First operand has 32 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-17 18:15:31,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:15:31,914 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-03-17 18:15:31,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 18:15:31,916 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-03-17 18:15:31,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:15:31,932 INFO L225 Difference]: With dead ends: 32 [2022-03-17 18:15:31,932 INFO L226 Difference]: Without dead ends: 27 [2022-03-17 18:15:31,934 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 18:15:31,941 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 19 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 18:15:31,942 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 34 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 18:15:31,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-17 18:15:31,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-03-17 18:15:31,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-17 18:15:31,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-03-17 18:15:31,982 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 28 [2022-03-17 18:15:31,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:15:31,982 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-03-17 18:15:31,983 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-17 18:15:31,984 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-03-17 18:15:31,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-17 18:15:31,985 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:15:31,985 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:15:31,985 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 18:15:31,986 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:15:31,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:15:31,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1063826184, now seen corresponding path program 1 times [2022-03-17 18:15:31,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:15:31,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452781173] [2022-03-17 18:15:31,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:15:31,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:15:32,024 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 18:15:32,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [885076156] [2022-03-17 18:15:32,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:15:32,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 18:15:32,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 18:15:32,027 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 18:15:32,028 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 18:15:32,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:15:32,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-17 18:15:32,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 18:15:32,233 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 18:15:32,233 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 18:15:32,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:15:32,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452781173] [2022-03-17 18:15:32,233 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 18:15:32,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885076156] [2022-03-17 18:15:32,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885076156] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 18:15:32,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 18:15:32,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 18:15:32,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543191293] [2022-03-17 18:15:32,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 18:15:32,235 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 18:15:32,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:15:32,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 18:15:32,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 18:15:32,237 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-17 18:15:32,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:15:32,297 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2022-03-17 18:15:32,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 18:15:32,298 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2022-03-17 18:15:32,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:15:32,299 INFO L225 Difference]: With dead ends: 37 [2022-03-17 18:15:32,300 INFO L226 Difference]: Without dead ends: 37 [2022-03-17 18:15:32,300 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-17 18:15:32,301 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 8 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 18:15:32,301 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 94 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 18:15:32,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-17 18:15:32,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2022-03-17 18:15:32,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.15) internal successors, (23), 22 states have internal predecessors, (23), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-17 18:15:32,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-03-17 18:15:32,308 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 28 [2022-03-17 18:15:32,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:15:32,309 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-03-17 18:15:32,309 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-17 18:15:32,309 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-03-17 18:15:32,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-17 18:15:32,310 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:15:32,310 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:15:32,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-17 18:15:32,511 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 18:15:32,512 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:15:32,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:15:32,512 INFO L85 PathProgramCache]: Analyzing trace with hash -499634320, now seen corresponding path program 1 times [2022-03-17 18:15:32,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:15:32,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139493977] [2022-03-17 18:15:32,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:15:32,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:15:32,536 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 18:15:32,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1870592830] [2022-03-17 18:15:32,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:15:32,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 18:15:32,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 18:15:32,538 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 18:15:32,539 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 18:15:32,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:15:32,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 18:15:32,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 18:15:32,661 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-17 18:15:32,661 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 18:15:32,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:15:32,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139493977] [2022-03-17 18:15:32,662 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 18:15:32,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870592830] [2022-03-17 18:15:32,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870592830] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 18:15:32,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 18:15:32,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-17 18:15:32,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204606941] [2022-03-17 18:15:32,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 18:15:32,663 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 18:15:32,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:15:32,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 18:15:32,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-17 18:15:32,664 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-17 18:15:32,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:15:32,711 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2022-03-17 18:15:32,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 18:15:32,712 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2022-03-17 18:15:32,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:15:32,714 INFO L225 Difference]: With dead ends: 36 [2022-03-17 18:15:32,714 INFO L226 Difference]: Without dead ends: 36 [2022-03-17 18:15:32,715 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-17 18:15:32,717 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 14 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 18:15:32,719 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 99 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 18:15:32,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-17 18:15:32,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2022-03-17 18:15:32,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-17 18:15:32,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-03-17 18:15:32,733 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 34 [2022-03-17 18:15:32,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:15:32,734 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-03-17 18:15:32,734 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-17 18:15:32,734 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-03-17 18:15:32,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-17 18:15:32,735 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:15:32,735 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:15:32,759 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 18:15:32,959 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 18:15:32,959 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:15:32,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:15:32,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1096608558, now seen corresponding path program 1 times [2022-03-17 18:15:32,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:15:32,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099359151] [2022-03-17 18:15:32,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:15:32,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:15:32,974 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 18:15:32,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1900829961] [2022-03-17 18:15:32,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:15:32,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 18:15:32,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 18:15:32,978 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 18:15:32,994 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 18:15:33,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:15:33,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-17 18:15:33,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 18:15:34,870 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 18:15:34,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 18:15:43,084 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 18:15:43,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:15:43,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099359151] [2022-03-17 18:15:43,085 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 18:15:43,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900829961] [2022-03-17 18:15:43,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900829961] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 18:15:43,085 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 18:15:43,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2022-03-17 18:15:43,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792479698] [2022-03-17 18:15:43,086 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 18:15:43,086 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-17 18:15:43,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:15:43,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-17 18:15:43,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=142, Unknown=1, NotChecked=0, Total=182 [2022-03-17 18:15:43,087 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-17 18:15:45,166 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 18:15:47,334 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 18:15:53,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:15:53,919 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2022-03-17 18:15:53,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-17 18:15:53,920 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 37 [2022-03-17 18:15:53,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:15:53,922 INFO L225 Difference]: With dead ends: 50 [2022-03-17 18:15:53,922 INFO L226 Difference]: Without dead ends: 50 [2022-03-17 18:15:53,922 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 59 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=74, Invalid=266, Unknown=2, NotChecked=0, Total=342 [2022-03-17 18:15:53,923 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 36 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 18 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-03-17 18:15:53,924 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 154 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 146 Invalid, 2 Unknown, 0 Unchecked, 5.5s Time] [2022-03-17 18:15:53,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-17 18:15:53,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2022-03-17 18:15:53,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 33 states have internal predecessors, (37), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-17 18:15:53,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2022-03-17 18:15:53,940 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 37 [2022-03-17 18:15:53,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:15:53,940 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2022-03-17 18:15:53,940 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-17 18:15:53,941 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2022-03-17 18:15:53,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-17 18:15:53,941 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:15:53,941 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:15:53,967 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-17 18:15:54,150 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 18:15:54,150 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:15:54,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:15:54,151 INFO L85 PathProgramCache]: Analyzing trace with hash -209104877, now seen corresponding path program 1 times [2022-03-17 18:15:54,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:15:54,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132159881] [2022-03-17 18:15:54,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:15:54,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:15:54,163 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 18:15:54,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1659467280] [2022-03-17 18:15:54,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:15:54,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 18:15:54,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 18:15:54,165 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 18:15:54,166 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 18:15:54,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:15:54,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-17 18:15:54,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 18:15:56,173 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-17 18:15:56,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 18:15:57,096 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-17 18:15:57,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:15:57,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132159881] [2022-03-17 18:15:57,097 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 18:15:57,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659467280] [2022-03-17 18:15:57,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659467280] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 18:15:57,097 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 18:15:57,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2022-03-17 18:15:57,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444992400] [2022-03-17 18:15:57,098 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 18:15:57,098 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-17 18:15:57,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:15:57,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-17 18:15:57,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-03-17 18:15:57,099 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 16 states have internal predecessors, (32), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-17 18:15:58,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:15:58,126 INFO L93 Difference]: Finished difference Result 71 states and 84 transitions. [2022-03-17 18:15:58,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-17 18:15:58,127 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 16 states have internal predecessors, (32), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 37 [2022-03-17 18:15:58,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:15:58,128 INFO L225 Difference]: With dead ends: 71 [2022-03-17 18:15:58,129 INFO L226 Difference]: Without dead ends: 71 [2022-03-17 18:15:58,129 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2022-03-17 18:15:58,130 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 46 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-17 18:15:58,130 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 206 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-17 18:15:58,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-03-17 18:15:58,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-03-17 18:15:58,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 49 states have (on average 1.183673469387755) internal successors, (58), 53 states have internal predecessors, (58), 14 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 9 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-17 18:15:58,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 84 transitions. [2022-03-17 18:15:58,138 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 84 transitions. Word has length 37 [2022-03-17 18:15:58,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:15:58,138 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 84 transitions. [2022-03-17 18:15:58,138 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 16 states have internal predecessors, (32), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-17 18:15:58,138 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 84 transitions. [2022-03-17 18:15:58,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-17 18:15:58,139 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:15:58,139 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:15:58,166 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-17 18:15:58,355 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 18:15:58,356 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:15:58,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:15:58,356 INFO L85 PathProgramCache]: Analyzing trace with hash -266261558, now seen corresponding path program 1 times [2022-03-17 18:15:58,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:15:58,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102674402] [2022-03-17 18:15:58,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:15:58,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:15:58,367 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 18:15:58,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1799917438] [2022-03-17 18:15:58,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:15:58,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 18:15:58,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 18:15:58,369 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 18:15:58,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-17 18:15:58,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:15:58,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-17 18:15:58,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 18:15:58,541 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-17 18:15:58,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 18:15:58,679 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-17 18:15:58,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:15:58,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102674402] [2022-03-17 18:15:58,679 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 18:15:58,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799917438] [2022-03-17 18:15:58,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799917438] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 18:15:58,680 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 18:15:58,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-03-17 18:15:58,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316313991] [2022-03-17 18:15:58,680 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 18:15:58,681 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-17 18:15:58,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:15:58,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-17 18:15:58,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-17 18:15:58,681 INFO L87 Difference]: Start difference. First operand 71 states and 84 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-17 18:16:00,696 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 18:16:02,743 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 18:16:02,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:16:02,772 INFO L93 Difference]: Finished difference Result 75 states and 87 transitions. [2022-03-17 18:16:02,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-17 18:16:02,772 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) Word has length 43 [2022-03-17 18:16:02,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:16:02,773 INFO L225 Difference]: With dead ends: 75 [2022-03-17 18:16:02,773 INFO L226 Difference]: Without dead ends: 70 [2022-03-17 18:16:02,774 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-03-17 18:16:02,774 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 13 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-03-17 18:16:02,775 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 169 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 2 Unknown, 0 Unchecked, 4.1s Time] [2022-03-17 18:16:02,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-17 18:16:02,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-03-17 18:16:02,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 52 states have internal predecessors, (55), 13 states have call successors, (13), 8 states have call predecessors, (13), 7 states have return successors, (12), 9 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-17 18:16:02,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 80 transitions. [2022-03-17 18:16:02,782 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 80 transitions. Word has length 43 [2022-03-17 18:16:02,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:16:02,783 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 80 transitions. [2022-03-17 18:16:02,790 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-17 18:16:02,791 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 80 transitions. [2022-03-17 18:16:02,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-17 18:16:02,792 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:16:02,792 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:16:02,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-17 18:16:02,994 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 18:16:02,995 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:16:02,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:16:02,996 INFO L85 PathProgramCache]: Analyzing trace with hash -172555565, now seen corresponding path program 1 times [2022-03-17 18:16:02,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:16:02,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328455253] [2022-03-17 18:16:02,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:16:02,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:16:03,006 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 18:16:03,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [452068134] [2022-03-17 18:16:03,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:16:03,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 18:16:03,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 18:16:03,008 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 18:16:03,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-17 18:16:03,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:16:03,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-17 18:16:03,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 18:16:03,543 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-17 18:16:03,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 18:16:04,300 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-17 18:16:04,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:16:04,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328455253] [2022-03-17 18:16:04,301 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 18:16:04,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452068134] [2022-03-17 18:16:04,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452068134] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 18:16:04,301 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 18:16:04,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2022-03-17 18:16:04,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313053474] [2022-03-17 18:16:04,302 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 18:16:04,302 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-17 18:16:04,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:16:04,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-17 18:16:04,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2022-03-17 18:16:04,303 INFO L87 Difference]: Start difference. First operand 70 states and 80 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 21 states have internal predecessors, (44), 10 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2022-03-17 18:16:04,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:16:04,734 INFO L93 Difference]: Finished difference Result 79 states and 90 transitions. [2022-03-17 18:16:04,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-17 18:16:04,735 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 21 states have internal predecessors, (44), 10 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) Word has length 55 [2022-03-17 18:16:04,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:16:04,737 INFO L225 Difference]: With dead ends: 79 [2022-03-17 18:16:04,737 INFO L226 Difference]: Without dead ends: 70 [2022-03-17 18:16:04,738 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=300, Invalid=1032, Unknown=0, NotChecked=0, Total=1332 [2022-03-17 18:16:04,739 INFO L912 BasicCegarLoop]: 30 mSDtfsCounter, 28 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 18:16:04,739 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 194 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 138 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2022-03-17 18:16:04,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-17 18:16:04,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-03-17 18:16:04,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 52 states have internal predecessors, (52), 13 states have call successors, (13), 8 states have call predecessors, (13), 7 states have return successors, (12), 9 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-17 18:16:04,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2022-03-17 18:16:04,745 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 55 [2022-03-17 18:16:04,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:16:04,746 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2022-03-17 18:16:04,746 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 21 states have internal predecessors, (44), 10 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2022-03-17 18:16:04,746 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2022-03-17 18:16:04,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-17 18:16:04,747 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:16:04,747 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:16:04,772 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-17 18:16:04,963 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 18:16:04,964 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:16:04,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:16:04,964 INFO L85 PathProgramCache]: Analyzing trace with hash -683089742, now seen corresponding path program 2 times [2022-03-17 18:16:04,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:16:04,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216166806] [2022-03-17 18:16:04,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:16:04,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:16:04,974 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 18:16:04,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1606517625] [2022-03-17 18:16:04,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 18:16:04,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 18:16:04,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 18:16:04,981 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 18:16:04,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-17 18:16:05,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 18:16:05,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 18:16:05,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-17 18:16:05,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 18:16:05,663 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-17 18:16:08,877 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 26 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 18:16:08,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 18:16:12,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:16:12,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216166806] [2022-03-17 18:16:12,873 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 18:16:12,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606517625] [2022-03-17 18:16:12,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606517625] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 18:16:12,873 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 18:16:12,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2022-03-17 18:16:12,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611975288] [2022-03-17 18:16:12,874 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 18:16:12,874 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-17 18:16:12,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:16:12,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-17 18:16:12,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2022-03-17 18:16:12,888 INFO L87 Difference]: Start difference. First operand 70 states and 77 transitions. Second operand has 21 states, 20 states have (on average 1.65) internal successors, (33), 18 states have internal predecessors, (33), 6 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-03-17 18:16:16,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:16:16,311 INFO L93 Difference]: Finished difference Result 84 states and 92 transitions. [2022-03-17 18:16:16,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-17 18:16:16,312 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.65) internal successors, (33), 18 states have internal predecessors, (33), 6 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 55 [2022-03-17 18:16:16,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:16:16,313 INFO L225 Difference]: With dead ends: 84 [2022-03-17 18:16:16,313 INFO L226 Difference]: Without dead ends: 84 [2022-03-17 18:16:16,313 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=152, Invalid=778, Unknown=0, NotChecked=0, Total=930 [2022-03-17 18:16:16,314 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 30 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-03-17 18:16:16,314 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 275 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 286 Invalid, 0 Unknown, 65 Unchecked, 3.3s Time] [2022-03-17 18:16:16,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-03-17 18:16:16,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 79. [2022-03-17 18:16:16,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 59 states have internal predecessors, (59), 14 states have call successors, (14), 9 states have call predecessors, (14), 8 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-17 18:16:16,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 86 transitions. [2022-03-17 18:16:16,321 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 86 transitions. Word has length 55 [2022-03-17 18:16:16,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:16:16,321 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 86 transitions. [2022-03-17 18:16:16,321 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.65) internal successors, (33), 18 states have internal predecessors, (33), 6 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-03-17 18:16:16,322 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 86 transitions. [2022-03-17 18:16:16,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-17 18:16:16,322 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:16:16,322 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:16:16,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-17 18:16:16,535 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 18:16:16,536 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:16:16,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:16:16,536 INFO L85 PathProgramCache]: Analyzing trace with hash 2045202388, now seen corresponding path program 3 times [2022-03-17 18:16:16,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:16:16,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353678561] [2022-03-17 18:16:16,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:16:16,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:16:16,546 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 18:16:16,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2113917420] [2022-03-17 18:16:16,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 18:16:16,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 18:16:16,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 18:16:16,555 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 18:16:16,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-17 18:16:16,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-17 18:16:16,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 18:16:16,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-17 18:16:16,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 18:16:20,764 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-17 18:16:21,703 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-03-17 18:16:21,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 18:16:23,195 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-03-17 18:16:23,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:16:23,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353678561] [2022-03-17 18:16:23,196 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 18:16:23,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113917420] [2022-03-17 18:16:23,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113917420] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 18:16:23,196 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 18:16:23,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2022-03-17 18:16:23,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595195765] [2022-03-17 18:16:23,196 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 18:16:23,197 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-17 18:16:23,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:16:23,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-17 18:16:23,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=240, Unknown=1, NotChecked=0, Total=306 [2022-03-17 18:16:23,197 INFO L87 Difference]: Start difference. First operand 79 states and 86 transitions. Second operand has 18 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-17 18:16:28,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:16:28,130 INFO L93 Difference]: Finished difference Result 90 states and 97 transitions. [2022-03-17 18:16:28,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-17 18:16:28,130 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 55 [2022-03-17 18:16:28,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:16:28,131 INFO L225 Difference]: With dead ends: 90 [2022-03-17 18:16:28,131 INFO L226 Difference]: Without dead ends: 51 [2022-03-17 18:16:28,132 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=118, Invalid=433, Unknown=1, NotChecked=0, Total=552 [2022-03-17 18:16:28,132 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 22 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-17 18:16:28,132 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 260 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 143 Invalid, 0 Unknown, 3 Unchecked, 0.6s Time] [2022-03-17 18:16:28,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-17 18:16:28,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-03-17 18:16:28,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 36 states have internal predecessors, (36), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-17 18:16:28,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2022-03-17 18:16:28,136 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 55 [2022-03-17 18:16:28,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:16:28,136 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2022-03-17 18:16:28,137 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-17 18:16:28,137 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2022-03-17 18:16:28,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-17 18:16:28,137 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:16:28,138 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:16:28,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-17 18:16:28,351 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-17 18:16:28,352 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:16:28,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:16:28,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1167519304, now seen corresponding path program 2 times [2022-03-17 18:16:28,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:16:28,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453717949] [2022-03-17 18:16:28,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:16:28,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:16:28,362 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 18:16:28,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1564365990] [2022-03-17 18:16:28,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 18:16:28,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 18:16:28,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 18:16:28,376 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 18:16:28,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-17 18:16:28,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 18:16:28,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 18:16:28,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-17 18:16:28,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 18:16:28,728 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-17 18:16:28,729 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 18:16:28,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:16:28,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453717949] [2022-03-17 18:16:28,729 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 18:16:28,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564365990] [2022-03-17 18:16:28,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564365990] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 18:16:28,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 18:16:28,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-17 18:16:28,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016569014] [2022-03-17 18:16:28,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 18:16:28,730 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-17 18:16:28,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:16:28,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-17 18:16:28,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-03-17 18:16:28,731 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 7 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2022-03-17 18:16:28,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:16:28,932 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2022-03-17 18:16:28,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-17 18:16:28,933 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 7 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) Word has length 64 [2022-03-17 18:16:28,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:16:28,933 INFO L225 Difference]: With dead ends: 42 [2022-03-17 18:16:28,934 INFO L226 Difference]: Without dead ends: 0 [2022-03-17 18:16:28,934 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2022-03-17 18:16:28,934 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 9 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 18:16:28,935 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 137 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 18:16:28,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-17 18:16:28,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-17 18:16:28,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-17 18:16:28,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-17 18:16:28,936 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 64 [2022-03-17 18:16:28,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:16:28,936 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-17 18:16:28,936 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 7 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2022-03-17 18:16:28,936 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-17 18:16:28,936 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-17 18:16:28,938 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-17 18:16:28,963 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-03-17 18:16:29,141 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-17 18:16:29,145 INFO L718 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1, 1, 1, 1] [2022-03-17 18:16:29,146 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-17 18:16:29,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 06:16:29 BasicIcfg [2022-03-17 18:16:29,149 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-17 18:16:29,149 INFO L158 Benchmark]: Toolchain (without parser) took 58246.29ms. Allocated memory was 169.9MB in the beginning and 209.7MB in the end (delta: 39.8MB). Free memory was 120.7MB in the beginning and 131.7MB in the end (delta: -11.0MB). Peak memory consumption was 29.2MB. Max. memory is 8.0GB. [2022-03-17 18:16:29,149 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 169.9MB. Free memory was 137.4MB in the beginning and 137.3MB in the end (delta: 74.6kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-17 18:16:29,149 INFO L158 Benchmark]: CACSL2BoogieTranslator took 220.99ms. Allocated memory is still 169.9MB. Free memory was 120.5MB in the beginning and 146.1MB in the end (delta: -25.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-03-17 18:16:29,150 INFO L158 Benchmark]: Boogie Preprocessor took 22.30ms. Allocated memory is still 169.9MB. Free memory was 146.1MB in the beginning and 144.8MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-17 18:16:29,150 INFO L158 Benchmark]: RCFGBuilder took 348.80ms. Allocated memory is still 169.9MB. Free memory was 144.8MB in the beginning and 134.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-17 18:16:29,150 INFO L158 Benchmark]: IcfgTransformer took 41.75ms. Allocated memory is still 169.9MB. Free memory was 134.3MB in the beginning and 133.0MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-17 18:16:29,150 INFO L158 Benchmark]: TraceAbstraction took 57599.70ms. Allocated memory was 169.9MB in the beginning and 209.7MB in the end (delta: 39.8MB). Free memory was 132.5MB in the beginning and 131.7MB in the end (delta: 804.5kB). Peak memory consumption was 41.2MB. Max. memory is 8.0GB. [2022-03-17 18:16:29,152 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 169.9MB. Free memory was 137.4MB in the beginning and 137.3MB in the end (delta: 74.6kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 220.99ms. Allocated memory is still 169.9MB. Free memory was 120.5MB in the beginning and 146.1MB in the end (delta: -25.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 22.30ms. Allocated memory is still 169.9MB. Free memory was 146.1MB in the beginning and 144.8MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 348.80ms. Allocated memory is still 169.9MB. Free memory was 144.8MB in the beginning and 134.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 41.75ms. Allocated memory is still 169.9MB. Free memory was 134.3MB in the beginning and 133.0MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 57599.70ms. Allocated memory was 169.9MB in the beginning and 209.7MB in the end (delta: 39.8MB). Free memory was 132.5MB in the beginning and 131.7MB in the end (delta: 804.5kB). Peak memory consumption was 41.2MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 15]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 57.5s, OverallIterations: 10, TraceHistogramMax: 5, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 25.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 4 mSolverCounterUnknown, 240 SdHoareTripleChecker+Valid, 14.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 225 mSDsluCounter, 1622 SdHoareTripleChecker+Invalid, 14.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 97 IncrementalHoareTripleChecker+Unchecked, 1368 mSDsCounter, 124 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1290 IncrementalHoareTripleChecker+Invalid, 1515 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 124 mSolverCounterUnsat, 254 mSDtfsCounter, 1290 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 712 GetRequests, 529 SyntacticMatches, 16 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 5 DeprecatedPredicates, 955 ImplicationChecksByTransitivity, 28.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=79occurred in iteration=8, InterpolantAutomatonStates: 117, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 14 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 29.5s InterpolantComputationTime, 436 NumberOfCodeBlocks, 427 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 648 ConstructedInterpolants, 7 QuantifiedInterpolants, 3254 SizeOfPredicates, 35 NumberOfNonLiveVariables, 1102 ConjunctsInSsa, 182 ConjunctsInUnsatCore, 15 InterpolantComputations, 4 PerfectInterpolantSequences, 422/485 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-03-17 18:16:29,197 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...