/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/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 17:05:03,009 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 17:05:03,017 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 17:05:03,040 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 17:05:03,040 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 17:05:03,040 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 17:05:03,041 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 17:05:03,042 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 17:05:03,046 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 17:05:03,050 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 17:05:03,050 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 17:05:03,052 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 17:05:03,052 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 17:05:03,054 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 17:05:03,055 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 17:05:03,056 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 17:05:03,057 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 17:05:03,057 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 17:05:03,062 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 17:05:03,065 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 17:05:03,066 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 17:05:03,066 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 17:05:03,067 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 17:05:03,069 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 17:05:03,069 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 17:05:03,071 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-20 17:05:03,071 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-20 17:05:03,071 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-20 17:05:03,071 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-20 17:05:03,072 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-20 17:05:03,072 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-20 17:05:03,072 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-20 17:05:03,073 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-20 17:05:03,073 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-20 17:05:03,073 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-20 17:05:03,074 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-20 17:05:03,074 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-20 17:05:03,074 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-20 17:05:03,075 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-20 17:05:03,075 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 17:05:03,075 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 17:05:03,084 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 17:05:03,084 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-20 17:05:03,095 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 17:05:03,096 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 17:05:03,098 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 17:05:03,098 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 17:05:03,098 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 17:05:03,098 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 17:05:03,098 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 17:05:03,098 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 17:05:03,098 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 17:05:03,099 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 17:05:03,099 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 17:05:03,099 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 17:05:03,099 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 17:05:03,099 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 17:05:03,099 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 17:05:03,099 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 17:05:03,099 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 17:05:03,099 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 17:05:03,100 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 17:05:03,100 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 17:05:03,103 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 17:05:03,103 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 17:05:03,103 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 17:05:03,104 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 17:05:03,104 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-20 17:05:03,104 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 17:05:03,249 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 17:05:03,263 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 17:05:03,264 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 17:05:03,265 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 17:05:03,265 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 17:05:03,266 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound2.c [2022-03-20 17:05:03,315 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21c8fff44/84f07cc787c548dba76d9875fdc2c5a8/FLAG41be39616 [2022-03-20 17:05:03,715 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 17:05:03,716 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound2.c [2022-03-20 17:05:03,719 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21c8fff44/84f07cc787c548dba76d9875fdc2c5a8/FLAG41be39616 [2022-03-20 17:05:03,727 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21c8fff44/84f07cc787c548dba76d9875fdc2c5a8 [2022-03-20 17:05:03,728 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 17:05:03,729 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 17:05:03,736 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 17:05:03,736 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 17:05:03,738 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 17:05:03,739 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 05:05:03" (1/1) ... [2022-03-20 17:05:03,739 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6034c4b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:05:03, skipping insertion in model container [2022-03-20 17:05:03,739 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 05:05:03" (1/1) ... [2022-03-20 17:05:03,743 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 17:05:03,751 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 17:05:03,893 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/sqrt1-ll_valuebound2.c[520,533] [2022-03-20 17:05:03,912 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 17:05:03,918 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 17:05:03,928 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/sqrt1-ll_valuebound2.c[520,533] [2022-03-20 17:05:03,941 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 17:05:03,951 INFO L208 MainTranslator]: Completed translation [2022-03-20 17:05:03,951 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:05:03 WrapperNode [2022-03-20 17:05:03,951 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 17:05:03,952 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 17:05:03,952 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 17:05:03,952 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 17:05:03,960 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:05:03" (1/1) ... [2022-03-20 17:05:03,960 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:05:03" (1/1) ... [2022-03-20 17:05:03,965 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:05:03" (1/1) ... [2022-03-20 17:05:03,966 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:05:03" (1/1) ... [2022-03-20 17:05:03,968 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:05:03" (1/1) ... [2022-03-20 17:05:03,970 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:05:03" (1/1) ... [2022-03-20 17:05:03,971 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:05:03" (1/1) ... [2022-03-20 17:05:03,972 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 17:05:03,972 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 17:05:03,972 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 17:05:03,972 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 17:05:03,973 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:05:03" (1/1) ... [2022-03-20 17:05:03,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 17:05:03,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:05:03,991 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) [2022-03-20 17:05:04,023 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 [2022-03-20 17:05:04,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 17:05:04,044 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 17:05:04,044 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 17:05:04,044 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 17:05:04,044 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 17:05:04,044 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 17:05:04,044 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 17:05:04,044 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 17:05:04,044 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 17:05:04,045 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 17:05:04,045 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 17:05:04,045 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 17:05:04,046 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 17:05:04,046 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 17:05:04,046 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 17:05:04,046 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 17:05:04,046 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 17:05:04,046 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 17:05:04,046 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 17:05:04,046 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 17:05:04,089 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 17:05:04,091 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 17:05:04,194 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 17:05:04,198 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 17:05:04,199 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 17:05:04,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 05:05:04 BoogieIcfgContainer [2022-03-20 17:05:04,200 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 17:05:04,215 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 17:05:04,216 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 17:05:04,223 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 17:05:04,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 05:05:03" (1/3) ... [2022-03-20 17:05:04,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2779ae64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 05:05:04, skipping insertion in model container [2022-03-20 17:05:04,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:05:03" (2/3) ... [2022-03-20 17:05:04,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2779ae64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 05:05:04, skipping insertion in model container [2022-03-20 17:05:04,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 05:05:04" (3/3) ... [2022-03-20 17:05:04,225 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_valuebound2.c [2022-03-20 17:05:04,228 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 17:05:04,229 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 17:05:04,253 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 17:05:04,261 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, 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 [2022-03-20 17:05:04,261 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 17:05:04,275 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 17:05:04,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 17:05:04,282 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:05:04,283 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:05:04,284 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:05:04,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:05:04,290 INFO L85 PathProgramCache]: Analyzing trace with hash 326851384, now seen corresponding path program 1 times [2022-03-20 17:05:04,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:05:04,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [957551625] [2022-03-20 17:05:04,304 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:05:04,304 INFO L85 PathProgramCache]: Analyzing trace with hash 326851384, now seen corresponding path program 2 times [2022-03-20 17:05:04,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:05:04,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915556818] [2022-03-20 17:05:04,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:05:04,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:05:04,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:05:04,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:05:04,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:05:04,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:05:04,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:05:04,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:05:04,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:05:04,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915556818] [2022-03-20 17:05:04,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915556818] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:05:04,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:05:04,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 17:05:04,483 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:05:04,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [957551625] [2022-03-20 17:05:04,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [957551625] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:05:04,484 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:05:04,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 17:05:04,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822193170] [2022-03-20 17:05:04,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:05:04,487 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 17:05:04,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:05:04,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 17:05:04,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 17:05:04,511 INFO L87 Difference]: Start difference. First operand has 31 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 17:05:04,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:05:04,586 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2022-03-20 17:05:04,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 17:05:04,588 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-20 17:05:04,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:05:04,593 INFO L225 Difference]: With dead ends: 53 [2022-03-20 17:05:04,593 INFO L226 Difference]: Without dead ends: 26 [2022-03-20 17:05:04,595 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 17:05:04,599 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 17:05:04,601 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 32 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 17:05:04,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-03-20 17:05:04,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-03-20 17:05:04,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 17:05:04,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-03-20 17:05:04,631 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 17 [2022-03-20 17:05:04,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:05:04,631 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-03-20 17:05:04,631 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 17:05:04,632 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-03-20 17:05:04,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 17:05:04,632 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:05:04,632 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:05:04,633 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 17:05:04,633 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:05:04,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:05:04,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1008578050, now seen corresponding path program 1 times [2022-03-20 17:05:04,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:05:04,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1954223051] [2022-03-20 17:05:04,634 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:05:04,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1008578050, now seen corresponding path program 2 times [2022-03-20 17:05:04,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:05:04,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877648359] [2022-03-20 17:05:04,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:05:04,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:05:04,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:05:04,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:05:04,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:05:04,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:05:04,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:05:04,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:05:04,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:05:04,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877648359] [2022-03-20 17:05:04,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877648359] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:05:04,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:05:04,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 17:05:04,741 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:05:04,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1954223051] [2022-03-20 17:05:04,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1954223051] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:05:04,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:05:04,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 17:05:04,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008991761] [2022-03-20 17:05:04,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:05:04,742 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 17:05:04,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:05:04,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 17:05:04,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 17:05:04,743 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 17:05:04,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:05:04,912 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2022-03-20 17:05:04,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 17:05:04,912 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-20 17:05:04,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:05:04,913 INFO L225 Difference]: With dead ends: 40 [2022-03-20 17:05:04,913 INFO L226 Difference]: Without dead ends: 38 [2022-03-20 17:05:04,914 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 17:05:04,915 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 25 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:05:04,915 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 39 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:05:04,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-20 17:05:04,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2022-03-20 17:05:04,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 17:05:04,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2022-03-20 17:05:04,934 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 17 [2022-03-20 17:05:04,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:05:04,935 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2022-03-20 17:05:04,935 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 17:05:04,935 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2022-03-20 17:05:04,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 17:05:04,935 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:05:04,935 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:05:04,936 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 17:05:04,936 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:05:04,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:05:04,936 INFO L85 PathProgramCache]: Analyzing trace with hash -789682422, now seen corresponding path program 1 times [2022-03-20 17:05:04,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:05:04,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1632450860] [2022-03-20 17:05:04,937 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:05:04,937 INFO L85 PathProgramCache]: Analyzing trace with hash -789682422, now seen corresponding path program 2 times [2022-03-20 17:05:04,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:05:04,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638835413] [2022-03-20 17:05:04,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:05:04,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:05:04,946 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 17:05:04,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [40908941] [2022-03-20 17:05:04,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:05:04,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:05:04,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:05:04,948 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) [2022-03-20 17:05:04,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 17:05:04,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:05:04,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:05:04,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 17:05:04,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:05:05,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:05:05,069 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 17:05:05,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:05:05,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638835413] [2022-03-20 17:05:05,070 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 17:05:05,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40908941] [2022-03-20 17:05:05,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40908941] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:05:05,070 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:05:05,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 17:05:05,071 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:05:05,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1632450860] [2022-03-20 17:05:05,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1632450860] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:05:05,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:05:05,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 17:05:05,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591220988] [2022-03-20 17:05:05,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:05:05,071 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 17:05:05,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:05:05,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 17:05:05,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 17:05:05,072 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 17:05:05,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:05:05,102 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2022-03-20 17:05:05,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 17:05:05,103 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-03-20 17:05:05,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:05:05,104 INFO L225 Difference]: With dead ends: 44 [2022-03-20 17:05:05,104 INFO L226 Difference]: Without dead ends: 42 [2022-03-20 17:05:05,104 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 17:05:05,105 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 6 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 17:05:05,105 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 115 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 17:05:05,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-03-20 17:05:05,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2022-03-20 17:05:05,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 23 states have internal predecessors, (24), 14 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 17:05:05,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2022-03-20 17:05:05,113 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 22 [2022-03-20 17:05:05,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:05:05,113 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2022-03-20 17:05:05,114 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 17:05:05,114 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2022-03-20 17:05:05,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-20 17:05:05,114 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:05:05,114 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:05:05,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 17:05:05,331 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:05:05,331 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:05:05,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:05:05,332 INFO L85 PathProgramCache]: Analyzing trace with hash 2087529154, now seen corresponding path program 1 times [2022-03-20 17:05:05,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:05:05,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1601479915] [2022-03-20 17:05:05,332 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:05:05,332 INFO L85 PathProgramCache]: Analyzing trace with hash 2087529154, now seen corresponding path program 2 times [2022-03-20 17:05:05,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:05:05,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933408299] [2022-03-20 17:05:05,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:05:05,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:05:05,343 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 17:05:05,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [527603205] [2022-03-20 17:05:05,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:05:05,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:05:05,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:05:05,345 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) [2022-03-20 17:05:05,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 17:05:05,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:05:05,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:05:05,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 17:05:05,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:05:05,467 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 17:05:05,468 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 17:05:05,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:05:05,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933408299] [2022-03-20 17:05:05,469 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 17:05:05,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527603205] [2022-03-20 17:05:05,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527603205] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:05:05,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:05:05,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 17:05:05,470 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:05:05,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1601479915] [2022-03-20 17:05:05,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1601479915] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:05:05,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:05:05,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 17:05:05,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126041245] [2022-03-20 17:05:05,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:05:05,472 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 17:05:05,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:05:05,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 17:05:05,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 17:05:05,479 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 17:05:05,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:05:05,518 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2022-03-20 17:05:05,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 17:05:05,519 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2022-03-20 17:05:05,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:05:05,520 INFO L225 Difference]: With dead ends: 48 [2022-03-20 17:05:05,521 INFO L226 Difference]: Without dead ends: 43 [2022-03-20 17:05:05,522 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 17:05:05,524 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 6 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 17:05:05,525 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 118 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 17:05:05,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-20 17:05:05,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-03-20 17:05:05,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 17:05:05,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2022-03-20 17:05:05,543 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 27 [2022-03-20 17:05:05,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:05:05,543 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2022-03-20 17:05:05,543 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 17:05:05,543 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2022-03-20 17:05:05,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-20 17:05:05,545 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:05:05,545 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:05:05,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 17:05:05,761 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,SelfDestructingSolverStorable3 [2022-03-20 17:05:05,762 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:05:05,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:05:05,762 INFO L85 PathProgramCache]: Analyzing trace with hash -2092280728, now seen corresponding path program 1 times [2022-03-20 17:05:05,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:05:05,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1092846850] [2022-03-20 17:05:20,382 WARN L232 SmtUtils]: Spent 14.44s on a formula simplification. DAG size of input: 118 DAG size of output: 111 (called from [L 564] de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.jordan.JordanLoopAcceleration.buildAccelerationFormula) [2022-03-20 17:05:20,387 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 3=1}}, 0 SequentialAcceleration, 1 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 17:05:20,388 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:05:20,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1589942244, now seen corresponding path program 1 times [2022-03-20 17:05:20,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:05:20,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205540127] [2022-03-20 17:05:20,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:05:20,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:05:20,405 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 17:05:20,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [333982594] [2022-03-20 17:05:20,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:05:20,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:05:20,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:05:20,407 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) [2022-03-20 17:05:20,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 17:05:20,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:05:20,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-20 17:05:20,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:05:24,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:05:24,814 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 17:05:24,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:05:24,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205540127] [2022-03-20 17:05:24,815 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 17:05:24,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333982594] [2022-03-20 17:05:24,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333982594] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:05:24,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:05:24,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 17:06:02,200 WARN L232 SmtUtils]: Spent 6.04s on a formula simplification. DAG size of input: 27 DAG size of output: 22 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 17:06:02,399 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:06:02,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1092846850] [2022-03-20 17:06:02,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1092846850] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:06:02,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:06:02,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 17:06:02,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822410243] [2022-03-20 17:06:02,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:06:02,400 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 17:06:02,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:06:02,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 17:06:02,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=299, Unknown=12, NotChecked=0, Total=380 [2022-03-20 17:06:02,401 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 18 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 11 states have internal predecessors, (22), 5 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 17:06:05,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:06:05,636 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2022-03-20 17:06:05,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 17:06:05,636 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 11 states have internal predecessors, (22), 5 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 34 [2022-03-20 17:06:05,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:06:05,638 INFO L225 Difference]: With dead ends: 59 [2022-03-20 17:06:05,638 INFO L226 Difference]: Without dead ends: 54 [2022-03-20 17:06:05,638 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 44.4s TimeCoverageRelationStatistics Valid=85, Invalid=365, Unknown=12, NotChecked=0, Total=462 [2022-03-20 17:06:05,649 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 12 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 17:06:05,649 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 227 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 19 Invalid, 0 Unknown, 72 Unchecked, 0.0s Time] [2022-03-20 17:06:05,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-20 17:06:05,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-03-20 17:06:05,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 33 states have (on average 1.121212121212121) internal successors, (37), 34 states have internal predecessors, (37), 11 states have call successors, (11), 10 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 17:06:05,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2022-03-20 17:06:05,667 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 34 [2022-03-20 17:06:05,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:06:05,667 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2022-03-20 17:06:05,667 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 11 states have internal predecessors, (22), 5 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 17:06:05,667 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2022-03-20 17:06:05,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-20 17:06:05,668 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:06:05,668 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:06:05,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 17:06:05,879 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:06:05,882 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:06:05,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:06:05,882 INFO L85 PathProgramCache]: Analyzing trace with hash 398970980, now seen corresponding path program 2 times [2022-03-20 17:06:05,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:06:05,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [815593128] [2022-03-20 17:06:12,058 WARN L232 SmtUtils]: Spent 6.10s on a formula simplification. DAG size of input: 115 DAG size of output: 103 (called from [L 564] de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.jordan.JordanLoopAcceleration.buildAccelerationFormula) [2022-03-20 17:06:12,060 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 3=1}}, 0 SequentialAcceleration, 1 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 17:06:12,060 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:06:12,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1173408528, now seen corresponding path program 1 times [2022-03-20 17:06:12,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:06:12,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856734829] [2022-03-20 17:06:12,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:06:12,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:06:12,070 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 17:06:12,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1174984345] [2022-03-20 17:06:12,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:06:12,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:06:12,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:06:12,072 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) [2022-03-20 17:06:12,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 17:06:12,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:06:12,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-20 17:06:12,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:06:12,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:06:12,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:06:12,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:06:12,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:06:12,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856734829] [2022-03-20 17:06:12,658 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 17:06:12,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174984345] [2022-03-20 17:06:12,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174984345] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:06:12,658 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 17:06:12,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 15 [2022-03-20 17:06:50,103 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:06:50,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [815593128] [2022-03-20 17:06:50,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [815593128] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:06:50,104 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:06:50,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-20 17:06:50,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995843340] [2022-03-20 17:06:50,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:06:50,104 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 17:06:50,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:06:50,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 17:06:50,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=665, Unknown=13, NotChecked=0, Total=812 [2022-03-20 17:06:50,106 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 24 states, 20 states have (on average 1.25) internal successors, (25), 15 states have internal predecessors, (25), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-20 17:06:52,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:06:52,505 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2022-03-20 17:06:52,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 17:06:52,505 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 1.25) internal successors, (25), 15 states have internal predecessors, (25), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 39 [2022-03-20 17:06:52,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:06:52,506 INFO L225 Difference]: With dead ends: 57 [2022-03-20 17:06:52,506 INFO L226 Difference]: Without dead ends: 55 [2022-03-20 17:06:52,507 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 39.6s TimeCoverageRelationStatistics Valid=167, Invalid=875, Unknown=14, NotChecked=0, Total=1056 [2022-03-20 17:06:52,507 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 23 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:06:52,507 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 249 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 69 Invalid, 0 Unknown, 89 Unchecked, 0.1s Time] [2022-03-20 17:06:52,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-20 17:06:52,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2022-03-20 17:06:52,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 34 states have internal predecessors, (36), 11 states have call successors, (11), 10 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 17:06:52,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2022-03-20 17:06:52,526 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 39 [2022-03-20 17:06:52,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:06:52,527 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2022-03-20 17:06:52,527 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 1.25) internal successors, (25), 15 states have internal predecessors, (25), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-20 17:06:52,527 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2022-03-20 17:06:52,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-20 17:06:52,528 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:06:52,528 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:06:52,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 17:06:52,737 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:06:52,738 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:06:52,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:06:52,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1537313192, now seen corresponding path program 3 times [2022-03-20 17:06:52,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:06:52,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [635680798] [2022-03-20 17:06:55,007 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 3=1}}, 0 SequentialAcceleration, 1 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 17:06:55,008 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:06:55,008 INFO L85 PathProgramCache]: Analyzing trace with hash 404335836, now seen corresponding path program 1 times [2022-03-20 17:06:55,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:06:55,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608346740] [2022-03-20 17:06:55,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:06:55,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:06:55,015 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 17:06:55,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1319508326] [2022-03-20 17:06:55,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:06:55,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:06:55,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:06:55,017 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) [2022-03-20 17:06:55,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 17:06:55,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:06:55,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-20 17:06:55,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:07:02,488 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 17:07:02,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:07:28,593 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 17:07:28,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:07:28,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608346740] [2022-03-20 17:07:28,594 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 17:07:28,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319508326] [2022-03-20 17:07:28,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319508326] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:07:28,594 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 17:07:28,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 15 [2022-03-20 17:08:06,702 WARN L232 SmtUtils]: Spent 6.03s on a formula simplification. DAG size of input: 27 DAG size of output: 22 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 17:08:06,861 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:08:06,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [635680798] [2022-03-20 17:08:06,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [635680798] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:08:06,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:08:06,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-20 17:08:06,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335806288] [2022-03-20 17:08:06,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:08:06,862 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 17:08:06,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:08:06,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 17:08:06,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=666, Unknown=12, NotChecked=0, Total=812 [2022-03-20 17:08:06,863 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand has 24 states, 20 states have (on average 1.4) internal successors, (28), 15 states have internal predecessors, (28), 6 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-20 17:08:13,144 WARN L232 SmtUtils]: Spent 6.08s on a formula simplification. DAG size of input: 24 DAG size of output: 19 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 17:08:13,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:08:13,350 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2022-03-20 17:08:13,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 17:08:13,350 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 1.4) internal successors, (28), 15 states have internal predecessors, (28), 6 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 44 [2022-03-20 17:08:13,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:08:13,350 INFO L225 Difference]: With dead ends: 56 [2022-03-20 17:08:13,351 INFO L226 Difference]: Without dead ends: 54 [2022-03-20 17:08:13,351 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 45 SyntacticMatches, 7 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 44.7s TimeCoverageRelationStatistics Valid=178, Invalid=932, Unknown=12, NotChecked=0, Total=1122 [2022-03-20 17:08:13,352 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 18 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 17:08:13,352 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 228 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 44 Invalid, 0 Unknown, 62 Unchecked, 0.0s Time] [2022-03-20 17:08:13,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-20 17:08:13,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-03-20 17:08:13,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 34 states have internal predecessors, (35), 11 states have call successors, (11), 10 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 17:08:13,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2022-03-20 17:08:13,366 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 44 [2022-03-20 17:08:13,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:08:13,366 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2022-03-20 17:08:13,367 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 1.4) internal successors, (28), 15 states have internal predecessors, (28), 6 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-20 17:08:13,367 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2022-03-20 17:08:13,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-20 17:08:13,367 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:08:13,367 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:08:13,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 17:08:13,583 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:08:13,584 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:08:13,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:08:13,584 INFO L85 PathProgramCache]: Analyzing trace with hash -985423115, now seen corresponding path program 1 times [2022-03-20 17:08:13,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:08:13,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [506799349] [2022-03-20 17:08:18,186 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 3=1}}, 0 SequentialAcceleration, 1 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 17:08:18,204 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:08:18,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1495863447, now seen corresponding path program 1 times [2022-03-20 17:08:18,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:08:18,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322436455] [2022-03-20 17:08:18,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:08:18,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:08:18,223 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 17:08:18,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [749895925] [2022-03-20 17:08:18,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:08:18,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:08:18,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:08:18,230 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) [2022-03-20 17:08:18,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 17:08:18,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:08:18,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 17:08:18,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:08:18,312 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-20 17:08:18,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:08:18,387 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-20 17:08:18,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:08:18,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322436455] [2022-03-20 17:08:18,388 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 17:08:18,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749895925] [2022-03-20 17:08:18,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749895925] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:08:18,388 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 17:08:18,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2022-03-20 17:08:55,024 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:08:55,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [506799349] [2022-03-20 17:08:55,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [506799349] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:08:55,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:08:55,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 17:08:55,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561994631] [2022-03-20 17:08:55,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:08:55,025 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 17:08:55,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:08:55,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 17:08:55,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=316, Unknown=13, NotChecked=0, Total=420 [2022-03-20 17:08:55,025 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 13 states have internal predecessors, (29), 3 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-20 17:09:09,336 WARN L232 SmtUtils]: Spent 10.08s on a formula simplification. DAG size of input: 23 DAG size of output: 19 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 17:09:09,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:09:09,509 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2022-03-20 17:09:09,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 17:09:09,509 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 13 states have internal predecessors, (29), 3 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 50 [2022-03-20 17:09:09,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:09:09,510 INFO L225 Difference]: With dead ends: 54 [2022-03-20 17:09:09,510 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 17:09:09,511 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 51.0s TimeCoverageRelationStatistics Valid=119, Invalid=466, Unknown=15, NotChecked=0, Total=600 [2022-03-20 17:09:09,511 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 19 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:09:09,511 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 180 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 100 Invalid, 0 Unknown, 40 Unchecked, 0.1s Time] [2022-03-20 17:09:09,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 17:09:09,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 17:09:09,512 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) [2022-03-20 17:09:09,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 17:09:09,512 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 50 [2022-03-20 17:09:09,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:09:09,512 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 17:09:09,512 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 13 states have internal predecessors, (29), 3 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-20 17:09:09,512 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 17:09:09,512 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 17:09:09,514 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 17:09:09,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 17:09:09,727 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:09:09,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-20 17:09:27,638 WARN L232 SmtUtils]: Spent 17.53s on a formula simplification. DAG size of input: 478 DAG size of output: 1 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-20 17:11:27,160 WARN L232 SmtUtils]: Spent 1.85m on a formula simplification. DAG size of input: 508 DAG size of output: 98 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-20 17:14:18,072 WARN L232 SmtUtils]: Spent 2.85m on a formula simplification. DAG size of input: 508 DAG size of output: 17 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-20 17:15:42,512 WARN L232 SmtUtils]: Spent 1.41m on a formula simplification. DAG size of input: 508 DAG size of output: 17 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-20 17:15:43,690 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 5) no Hoare annotation was computed. [2022-03-20 17:15:43,691 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 5) no Hoare annotation was computed. [2022-03-20 17:15:43,691 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 5) no Hoare annotation was computed. [2022-03-20 17:15:43,691 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 8 10) the Hoare annotation is: true [2022-03-20 17:15:43,691 INFO L878 garLoopResultBuilder]: At program point L9(line 9) the Hoare annotation is: (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|) [2022-03-20 17:15:43,691 INFO L878 garLoopResultBuilder]: At program point L9-2(lines 8 10) the Hoare annotation is: (and (not (= |assume_abort_if_not_#in~cond| 0)) (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)) [2022-03-20 17:15:43,691 INFO L878 garLoopResultBuilder]: At program point assume_abort_if_notEXIT(lines 8 10) the Hoare annotation is: (and (not (= |assume_abort_if_not_#in~cond| 0)) (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)) [2022-03-20 17:15:43,691 INFO L878 garLoopResultBuilder]: At program point L33(lines 30 42) the Hoare annotation is: (and (= (+ (* main_~t~0 2) (* main_~t~0 main_~t~0) 1) (* main_~s~0 4)) (= main_~t~0 (+ (* main_~a~0 2) 1))) [2022-03-20 17:15:43,691 INFO L878 garLoopResultBuilder]: At program point L31(line 31) the Hoare annotation is: (let ((.cse0 (div (+ 3 (* (- 1) main_~t~0)) (- 4)))) (and (<= main_~s~0 (+ main_~n~0 main_~t~0)) (< .cse0 1) (<= 0 .cse0) (= (+ (* main_~t~0 2) (* main_~t~0 main_~t~0) 1) (* main_~s~0 4)) (= main_~t~0 (+ (* main_~a~0 2) 1)))) [2022-03-20 17:15:43,691 INFO L878 garLoopResultBuilder]: At program point L31-1(line 31) the Hoare annotation is: (let ((.cse1 (= (+ (* main_~t~0 2) (* main_~t~0 main_~t~0) 1) (* main_~s~0 4))) (.cse2 (= main_~t~0 (+ (* main_~a~0 2) 1)))) (or (let ((.cse0 (div (+ 3 (* (- 1) main_~t~0)) (- 4)))) (and (<= main_~s~0 (+ main_~n~0 main_~t~0)) (< .cse0 1) (<= 0 .cse0) .cse1 .cse2)) (and (= main_~t~0 1) .cse1 .cse2))) [2022-03-20 17:15:43,692 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 20 49) the Hoare annotation is: true [2022-03-20 17:15:43,692 INFO L885 garLoopResultBuilder]: At program point L46(line 46) the Hoare annotation is: true [2022-03-20 17:15:43,692 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 20 49) the Hoare annotation is: true [2022-03-20 17:15:43,692 INFO L878 garLoopResultBuilder]: At program point L44(line 44) the Hoare annotation is: (and (= (+ (* main_~t~0 2) (* main_~t~0 main_~t~0) 1) (* main_~s~0 4)) (= main_~t~0 (+ (* main_~a~0 2) 1))) [2022-03-20 17:15:43,692 INFO L878 garLoopResultBuilder]: At program point L32(line 32) the Hoare annotation is: (let ((.cse0 (= main_~s~0 1))) (let ((.cse1 (or (and (= main_~t~0 1) .cse0) (let ((.cse3 (div (+ (- 1) (div (+ (* (- 1) main_~t~0) 1) (- 2))) 2))) (and (<= 0 .cse3) (= main_~s~0 (+ (* 4 (* .cse3 .cse3)) (* .cse3 8) 4)) (= (+ (* .cse3 4) 3) main_~t~0) (< .cse3 1))))) (.cse2 (= main_~t~0 (+ (* main_~a~0 2) 1)))) (or (and .cse0 .cse1 .cse2) (and (<= main_~s~0 (+ main_~n~0 main_~t~0)) .cse1 .cse2)))) [2022-03-20 17:15:43,692 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 20 49) the Hoare annotation is: true [2022-03-20 17:15:43,692 INFO L878 garLoopResultBuilder]: At program point L30-2(lines 30 42) the Hoare annotation is: (let ((.cse0 (* main_~a~0 2))) (and (<= main_~s~0 (+ main_~n~0 main_~t~0)) (= (+ .cse0 (* main_~a~0 main_~a~0) 1) main_~s~0) (= main_~t~0 (+ .cse0 1)))) [2022-03-20 17:15:43,692 INFO L878 garLoopResultBuilder]: At program point L30-3(lines 30 42) the Hoare annotation is: (and (= (+ (* main_~t~0 2) (* main_~t~0 main_~t~0) 1) (* main_~s~0 4)) (= main_~t~0 (+ (* main_~a~0 2) 1))) [2022-03-20 17:15:43,692 INFO L885 garLoopResultBuilder]: At program point L24(line 24) the Hoare annotation is: true [2022-03-20 17:15:43,692 INFO L878 garLoopResultBuilder]: At program point L24-1(line 24) the Hoare annotation is: (and (<= main_~n~0 2) (<= 0 main_~n~0)) [2022-03-20 17:15:43,692 INFO L878 garLoopResultBuilder]: At program point L45(line 45) the Hoare annotation is: (= (+ (* main_~t~0 2) (* main_~t~0 main_~t~0) 1) (* main_~s~0 4)) [2022-03-20 17:15:43,692 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-03-20 17:15:43,692 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-03-20 17:15:43,692 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-03-20 17:15:43,692 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-03-20 17:15:43,692 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-20 17:15:43,693 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-20 17:15:43,693 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-03-20 17:15:43,693 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 11 17) the Hoare annotation is: true [2022-03-20 17:15:43,693 INFO L878 garLoopResultBuilder]: At program point L13(lines 13 14) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2022-03-20 17:15:43,693 INFO L878 garLoopResultBuilder]: At program point L12(lines 12 15) the Hoare annotation is: (and (or (not (<= 1 |__VERIFIER_assert_#in~cond|)) (<= 1 __VERIFIER_assert_~cond)) (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (forall ((v_main_~n~0_BEFORE_CALL_1 Int) (v_main_~s~0_BEFORE_CALL_6 Int) (v_main_~a~0_BEFORE_CALL_4 Int) (v_main_~t~0_BEFORE_CALL_5 Int)) (or (let ((.cse0 (= (+ (* 2 v_main_~a~0_BEFORE_CALL_4) 1) v_main_~t~0_BEFORE_CALL_5))) (and (or (not (= |__VERIFIER_assert_#in~cond| 1)) (not .cse0)) (or (not (= |__VERIFIER_assert_#in~cond| 0)) .cse0))) (and (let ((.cse1 (div v_main_~a~0_BEFORE_CALL_4 2))) (let ((.cse2 (* .cse1 4))) (or (not (= (+ (* (* .cse1 .cse1) 4) .cse2 1) v_main_~s~0_BEFORE_CALL_6)) (exists ((v_itHalf_1 Int)) (and (<= (+ v_itHalf_1 1) (div v_main_~a~0_BEFORE_CALL_4 2)) (<= 0 v_itHalf_1) (not (<= (+ (* v_itHalf_1 8) (* (* v_itHalf_1 v_itHalf_1) 4) 4) v_main_~n~0_BEFORE_CALL_1)))) (not (= v_main_~t~0_BEFORE_CALL_5 (+ .cse2 1))) (not (< 0 .cse1)) (not (= (mod v_main_~a~0_BEFORE_CALL_4 2) 0))))) (let ((.cse3 (div (+ (- 3) v_main_~t~0_BEFORE_CALL_5) 4))) (or (not (= (+ (* (* .cse3 .cse3) 4) (* .cse3 8) 4) v_main_~s~0_BEFORE_CALL_6)) (not (= (+ (* 2 .cse3) 1) v_main_~a~0_BEFORE_CALL_4)) (not (<= 0 .cse3)) (not (<= 1 v_main_~n~0_BEFORE_CALL_1)) (not (= (mod (+ v_main_~t~0_BEFORE_CALL_5 1) 4) 0)) (exists ((v_itHalf_1 Int)) (and (not (<= (+ (* v_itHalf_1 4) (* (* v_itHalf_1 v_itHalf_1) 4) 1) v_main_~n~0_BEFORE_CALL_1)) (<= 1 v_itHalf_1) (<= v_itHalf_1 (div (+ (- 3) v_main_~t~0_BEFORE_CALL_5) 4)))))) (or (not (= v_main_~t~0_BEFORE_CALL_5 1)) (not (= v_main_~a~0_BEFORE_CALL_4 0)))))))) [2022-03-20 17:15:43,693 INFO L878 garLoopResultBuilder]: At program point L12-2(lines 11 17) the Hoare annotation is: (and (or (not (<= 1 |__VERIFIER_assert_#in~cond|)) (<= 1 __VERIFIER_assert_~cond)) (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) (or (not (= |__VERIFIER_assert_#in~cond| 1)) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond))) [2022-03-20 17:15:43,693 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 11 17) the Hoare annotation is: (and (or (not (<= 1 |__VERIFIER_assert_#in~cond|)) (<= 1 __VERIFIER_assert_~cond)) (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) (or (not (= |__VERIFIER_assert_#in~cond| 1)) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond))) [2022-03-20 17:15:43,693 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2022-03-20 17:15:43,695 INFO L719 BasicCegarLoop]: Path program histogram: [3, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-03-20 17:15:43,696 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 17:15:43,711 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 05:15:43 BoogieIcfgContainer [2022-03-20 17:15:43,711 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 17:15:43,712 INFO L158 Benchmark]: Toolchain (without parser) took 639982.64ms. Allocated memory was 202.4MB in the beginning and 261.1MB in the end (delta: 58.7MB). Free memory was 154.5MB in the beginning and 226.9MB in the end (delta: -72.4MB). Peak memory consumption was 126.7MB. Max. memory is 8.0GB. [2022-03-20 17:15:43,712 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 202.4MB. Free memory was 170.7MB in the beginning and 170.5MB in the end (delta: 151.8kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 17:15:43,712 INFO L158 Benchmark]: CACSL2BoogieTranslator took 215.27ms. Allocated memory is still 202.4MB. Free memory was 154.4MB in the beginning and 178.9MB in the end (delta: -24.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-03-20 17:15:43,713 INFO L158 Benchmark]: Boogie Preprocessor took 19.65ms. Allocated memory is still 202.4MB. Free memory was 178.9MB in the beginning and 177.6MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 17:15:43,713 INFO L158 Benchmark]: RCFGBuilder took 227.70ms. Allocated memory is still 202.4MB. Free memory was 177.6MB in the beginning and 167.4MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-20 17:15:43,713 INFO L158 Benchmark]: TraceAbstraction took 639496.00ms. Allocated memory was 202.4MB in the beginning and 261.1MB in the end (delta: 58.7MB). Free memory was 167.2MB in the beginning and 226.9MB in the end (delta: -59.7MB). Peak memory consumption was 139.5MB. Max. memory is 8.0GB. [2022-03-20 17:15:43,714 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 202.4MB. Free memory was 170.7MB in the beginning and 170.5MB in the end (delta: 151.8kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 215.27ms. Allocated memory is still 202.4MB. Free memory was 154.4MB in the beginning and 178.9MB in the end (delta: -24.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 19.65ms. Allocated memory is still 202.4MB. Free memory was 178.9MB in the beginning and 177.6MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 227.70ms. Allocated memory is still 202.4MB. Free memory was 177.6MB in the beginning and 167.4MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 639496.00ms. Allocated memory was 202.4MB in the beginning and 261.1MB in the end (delta: 58.7MB). Free memory was 167.2MB in the beginning and 226.9MB in the end (delta: -59.7MB). Peak memory consumption was 139.5MB. 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: 14]: 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 6 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 639.4s, OverallIterations: 8, TraceHistogramMax: 7, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 27.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 394.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 148 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 124 mSDsluCounter, 1188 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 263 IncrementalHoareTripleChecker+Unchecked, 977 mSDsCounter, 85 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 396 IncrementalHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 85 mSolverCounterUnsat, 211 mSDtfsCounter, 396 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 366 GetRequests, 224 SyntacticMatches, 19 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 953 ImplicationChecksByTransitivity, 179.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred in iteration=5, InterpolantAutomatonStates: 90, 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, 8 MinimizatonAttempts, 4 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 31 LocationsWithAnnotation, 133 PreInvPairs, 191 NumberOfFragments, 729 HoareAnnotationTreeSize, 133 FomulaSimplifications, 141 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 31 FomulaSimplificationsInter, 20307 FormulaSimplificationTreeSizeReductionInter, 393.9s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, 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 - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: (s <= n + t && a * 2 + a * a + 1 == s) && t == a * 2 + 1 - ProcedureContractResult [Line: 8]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not: !(\old(cond) == 0) && cond == \old(cond) - ProcedureContractResult [Line: 20]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 11]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: ((!(1 <= \old(cond)) || 1 <= cond) && (\old(cond) == 0 || !(cond == 0))) && (!(\old(cond) == 1) || \old(cond) == cond) RESULT: Ultimate proved your program to be correct! [2022-03-20 17:15:43,939 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2022-03-20 17:15:44,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request...