/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/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 10:37:06,854 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 10:37:06,855 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 10:37:06,894 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-19 10:37:06,895 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-19 10:37:06,898 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-19 10:37:06,901 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-19 10:37:06,906 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-19 10:37:06,907 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-19 10:37:06,911 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-19 10:37:06,912 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-19 10:37:06,913 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-19 10:37:06,913 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-19 10:37:06,915 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-19 10:37:06,916 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-19 10:37:06,917 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-19 10:37:06,917 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-19 10:37:06,918 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-19 10:37:06,921 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-19 10:37:06,922 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-19 10:37:06,923 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-19 10:37:06,924 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-19 10:37:06,924 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-19 10:37:06,925 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-19 10:37:06,926 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-19 10:37:06,932 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-19 10:37:06,932 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-19 10:37:06,932 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-19 10:37:06,933 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-19 10:37:06,933 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-19 10:37:06,934 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-19 10:37:06,934 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-19 10:37:06,934 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-19 10:37:06,935 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-19 10:37:06,935 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-19 10:37:06,936 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-19 10:37:06,936 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-19 10:37:06,936 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-19 10:37:06,937 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-19 10:37:06,937 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 10:37:06,938 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 10:37:06,939 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 10:37:06,939 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-19 10:37:06,959 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 10:37:06,959 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 10:37:06,961 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 10:37:06,961 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 10:37:06,961 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 10:37:06,961 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 10:37:06,961 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 10:37:06,961 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 10:37:06,961 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 10:37:06,962 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 10:37:06,962 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 10:37:06,962 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 10:37:06,962 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 10:37:06,962 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 10:37:06,962 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 10:37:06,962 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 10:37:06,963 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 10:37:06,963 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 10:37:06,963 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 10:37:06,963 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 10:37:06,963 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 10:37:06,963 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-19 10:37:06,963 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 10:37:07,134 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 10:37:07,172 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 10:37:07,173 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 10:37:07,174 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 10:37:07,174 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 10:37:07,175 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound5.c [2022-03-19 10:37:07,218 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88990ba55/06e0009e507d4d32b912076f384efb72/FLAGacfa43ce6 [2022-03-19 10:37:07,588 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 10:37:07,589 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound5.c [2022-03-19 10:37:07,597 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88990ba55/06e0009e507d4d32b912076f384efb72/FLAGacfa43ce6 [2022-03-19 10:37:07,608 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88990ba55/06e0009e507d4d32b912076f384efb72 [2022-03-19 10:37:07,610 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 10:37:07,610 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 10:37:07,612 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 10:37:07,612 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 10:37:07,615 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 10:37:07,615 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 10:37:07" (1/1) ... [2022-03-19 10:37:07,616 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2eee7128 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:37:07, skipping insertion in model container [2022-03-19 10:37:07,616 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 10:37:07" (1/1) ... [2022-03-19 10:37:07,621 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 10:37:07,637 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 10:37:07,824 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/egcd3-ll_valuebound5.c[490,503] [2022-03-19 10:37:07,854 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 10:37:07,862 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 10:37:07,870 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/egcd3-ll_valuebound5.c[490,503] [2022-03-19 10:37:07,889 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 10:37:07,897 INFO L208 MainTranslator]: Completed translation [2022-03-19 10:37:07,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:37:07 WrapperNode [2022-03-19 10:37:07,897 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 10:37:07,898 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 10:37:07,898 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 10:37:07,898 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 10:37:07,906 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:37:07" (1/1) ... [2022-03-19 10:37:07,907 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:37:07" (1/1) ... [2022-03-19 10:37:07,912 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:37:07" (1/1) ... [2022-03-19 10:37:07,912 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:37:07" (1/1) ... [2022-03-19 10:37:07,922 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:37:07" (1/1) ... [2022-03-19 10:37:07,927 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:37:07" (1/1) ... [2022-03-19 10:37:07,931 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:37:07" (1/1) ... [2022-03-19 10:37:07,935 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 10:37:07,935 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 10:37:07,935 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 10:37:07,935 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 10:37:07,936 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:37:07" (1/1) ... [2022-03-19 10:37:07,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 10:37:07,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:37:07,958 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) [2022-03-19 10:37:07,979 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 [2022-03-19 10:37:07,985 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 10:37:07,985 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 10:37:07,985 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 10:37:07,985 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 10:37:07,986 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 10:37:07,986 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 10:37:07,986 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 10:37:07,986 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 10:37:07,986 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 10:37:07,987 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 10:37:07,987 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-19 10:37:07,987 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 10:37:07,987 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 10:37:07,987 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 10:37:07,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 10:37:07,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 10:37:07,989 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 10:37:07,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 10:37:07,989 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 10:37:07,989 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 10:37:08,037 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 10:37:08,038 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 10:37:08,157 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 10:37:08,161 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 10:37:08,161 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-03-19 10:37:08,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 10:37:08 BoogieIcfgContainer [2022-03-19 10:37:08,162 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 10:37:08,163 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 10:37:08,163 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 10:37:08,166 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 10:37:08,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 10:37:07" (1/3) ... [2022-03-19 10:37:08,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ab296ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 10:37:08, skipping insertion in model container [2022-03-19 10:37:08,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:37:07" (2/3) ... [2022-03-19 10:37:08,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ab296ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 10:37:08, skipping insertion in model container [2022-03-19 10:37:08,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 10:37:08" (3/3) ... [2022-03-19 10:37:08,167 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound5.c [2022-03-19 10:37:08,170 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 10:37:08,170 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 10:37:08,204 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 10:37:08,216 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 [2022-03-19 10:37:08,216 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 10:37:08,226 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-19 10:37:08,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-19 10:37:08,236 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:37:08,237 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:37:08,238 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:37:08,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:37:08,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1237885594, now seen corresponding path program 1 times [2022-03-19 10:37:08,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:37:08,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [16963954] [2022-03-19 10:37:08,267 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:37:08,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1237885594, now seen corresponding path program 2 times [2022-03-19 10:37:08,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:37:08,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655260159] [2022-03-19 10:37:08,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:37:08,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:37:08,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 10:37:08,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 10:37:08,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 10:37:08,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 10:37:08,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 10:37:08,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 10:37:08,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 10:37:08,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 10:37:08,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 10:37:08,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-19 10:37:08,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 10:37:08,437 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 10:37:08,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:37:08,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655260159] [2022-03-19 10:37:08,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655260159] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:37:08,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:37:08,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 10:37:08,440 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:37:08,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [16963954] [2022-03-19 10:37:08,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [16963954] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:37:08,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:37:08,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 10:37:08,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714617599] [2022-03-19 10:37:08,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:37:08,444 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 10:37:08,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:37:08,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 10:37:08,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 10:37:08,470 INFO L87 Difference]: Start difference. First operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 10:37:08,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:37:08,554 INFO L93 Difference]: Finished difference Result 73 states and 115 transitions. [2022-03-19 10:37:08,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 10:37:08,556 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-03-19 10:37:08,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:37:08,561 INFO L225 Difference]: With dead ends: 73 [2022-03-19 10:37:08,561 INFO L226 Difference]: Without dead ends: 35 [2022-03-19 10:37:08,564 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 10:37:08,569 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 24 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 10:37:08,570 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 43 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 10:37:08,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-19 10:37:08,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-03-19 10:37:08,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-19 10:37:08,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2022-03-19 10:37:08,607 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 33 [2022-03-19 10:37:08,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:37:08,608 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2022-03-19 10:37:08,608 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 10:37:08,609 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2022-03-19 10:37:08,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-19 10:37:08,610 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:37:08,611 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:37:08,611 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 10:37:08,611 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:37:08,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:37:08,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1569470122, now seen corresponding path program 1 times [2022-03-19 10:37:08,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:37:08,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1758816196] [2022-03-19 10:37:08,613 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:37:08,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1569470122, now seen corresponding path program 2 times [2022-03-19 10:37:08,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:37:08,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454543324] [2022-03-19 10:37:08,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:37:08,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:37:08,650 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:37:08,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [481984385] [2022-03-19 10:37:08,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:37:08,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:37:08,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:37:08,672 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) [2022-03-19 10:37:08,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 10:37:08,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-19 10:37:08,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:37:08,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-19 10:37:08,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:37:08,945 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 10:37:08,946 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 10:37:08,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:37:08,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454543324] [2022-03-19 10:37:08,946 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:37:08,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481984385] [2022-03-19 10:37:08,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481984385] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:37:08,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:37:08,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 10:37:08,949 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:37:08,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1758816196] [2022-03-19 10:37:08,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1758816196] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:37:08,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:37:08,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 10:37:08,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000366914] [2022-03-19 10:37:08,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:37:08,950 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 10:37:08,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:37:08,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 10:37:08,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-19 10:37:08,951 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-19 10:37:09,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:37:09,057 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2022-03-19 10:37:09,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 10:37:09,057 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2022-03-19 10:37:09,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:37:09,058 INFO L225 Difference]: With dead ends: 54 [2022-03-19 10:37:09,059 INFO L226 Difference]: Without dead ends: 51 [2022-03-19 10:37:09,059 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-19 10:37:09,060 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 14 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:37:09,060 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 197 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:37:09,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-19 10:37:09,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-03-19 10:37:09,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 30 states have (on average 1.2) internal successors, (36), 31 states have internal predecessors, (36), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-19 10:37:09,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2022-03-19 10:37:09,069 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 34 [2022-03-19 10:37:09,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:37:09,070 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2022-03-19 10:37:09,070 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-19 10:37:09,070 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2022-03-19 10:37:09,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-19 10:37:09,071 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:37:09,071 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:37:09,103 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-19 10:37:09,304 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:37:09,304 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:37:09,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:37:09,305 INFO L85 PathProgramCache]: Analyzing trace with hash 584996456, now seen corresponding path program 1 times [2022-03-19 10:37:09,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:37:09,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [899405367] [2022-03-19 10:37:09,305 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:37:09,305 INFO L85 PathProgramCache]: Analyzing trace with hash 584996456, now seen corresponding path program 2 times [2022-03-19 10:37:09,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:37:09,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211615232] [2022-03-19 10:37:09,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:37:09,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:37:09,316 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:37:09,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1201716013] [2022-03-19 10:37:09,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:37:09,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:37:09,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:37:09,318 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) [2022-03-19 10:37:09,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 10:37:09,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:37:09,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:37:09,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 10:37:09,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:37:09,467 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-19 10:37:09,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:37:09,595 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-19 10:37:09,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:37:09,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211615232] [2022-03-19 10:37:09,596 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:37:09,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201716013] [2022-03-19 10:37:09,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201716013] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:37:09,596 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:37:09,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-19 10:37:09,596 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:37:09,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [899405367] [2022-03-19 10:37:09,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [899405367] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:37:09,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:37:09,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 10:37:09,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300990660] [2022-03-19 10:37:09,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:37:09,597 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 10:37:09,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:37:09,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 10:37:09,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-19 10:37:09,598 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 10:37:09,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:37:09,747 INFO L93 Difference]: Finished difference Result 103 states and 143 transitions. [2022-03-19 10:37:09,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 10:37:09,748 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-03-19 10:37:09,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:37:09,749 INFO L225 Difference]: With dead ends: 103 [2022-03-19 10:37:09,749 INFO L226 Difference]: Without dead ends: 96 [2022-03-19 10:37:09,750 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-19 10:37:09,751 INFO L912 BasicCegarLoop]: 51 mSDtfsCounter, 58 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:37:09,751 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 288 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:37:09,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-03-19 10:37:09,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2022-03-19 10:37:09,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 48 states have internal predecessors, (59), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-19 10:37:09,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 95 transitions. [2022-03-19 10:37:09,766 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 95 transitions. Word has length 39 [2022-03-19 10:37:09,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:37:09,766 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 95 transitions. [2022-03-19 10:37:09,766 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 10:37:09,767 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 95 transitions. [2022-03-19 10:37:09,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-19 10:37:09,767 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:37:09,767 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:37:09,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 10:37:09,983 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-19 10:37:09,983 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:37:09,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:37:09,984 INFO L85 PathProgramCache]: Analyzing trace with hash -974923140, now seen corresponding path program 1 times [2022-03-19 10:37:09,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:37:09,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [116432866] [2022-03-19 10:37:09,985 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:37:09,985 INFO L85 PathProgramCache]: Analyzing trace with hash -974923140, now seen corresponding path program 2 times [2022-03-19 10:37:09,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:37:09,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623166246] [2022-03-19 10:37:09,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:37:09,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:37:09,995 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:37:09,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2063501584] [2022-03-19 10:37:09,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:37:09,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:37:09,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:37:09,997 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) [2022-03-19 10:37:10,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 10:37:10,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:37:10,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:37:10,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-19 10:37:10,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:37:10,451 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 10:37:10,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:37:10,662 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 10:37:10,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:37:10,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623166246] [2022-03-19 10:37:10,664 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:37:10,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063501584] [2022-03-19 10:37:10,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063501584] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:37:10,669 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:37:10,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 18 [2022-03-19 10:37:10,669 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:37:10,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [116432866] [2022-03-19 10:37:10,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [116432866] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:37:10,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:37:10,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 10:37:10,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753708692] [2022-03-19 10:37:10,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:37:10,672 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 10:37:10,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:37:10,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 10:37:10,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-03-19 10:37:10,673 INFO L87 Difference]: Start difference. First operand 71 states and 95 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-19 10:37:10,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:37:10,983 INFO L93 Difference]: Finished difference Result 112 states and 151 transitions. [2022-03-19 10:37:10,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 10:37:10,983 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 42 [2022-03-19 10:37:10,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:37:10,986 INFO L225 Difference]: With dead ends: 112 [2022-03-19 10:37:10,986 INFO L226 Difference]: Without dead ends: 110 [2022-03-19 10:37:10,987 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-03-19 10:37:10,989 INFO L912 BasicCegarLoop]: 52 mSDtfsCounter, 63 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 10:37:10,990 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 389 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 10:37:10,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-03-19 10:37:11,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 93. [2022-03-19 10:37:11,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 64 states have internal predecessors, (78), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-19 10:37:11,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 122 transitions. [2022-03-19 10:37:11,036 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 122 transitions. Word has length 42 [2022-03-19 10:37:11,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:37:11,038 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 122 transitions. [2022-03-19 10:37:11,038 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-19 10:37:11,038 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 122 transitions. [2022-03-19 10:37:11,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-19 10:37:11,041 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:37:11,041 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:37:11,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 10:37:11,257 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:37:11,258 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:37:11,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:37:11,258 INFO L85 PathProgramCache]: Analyzing trace with hash 81990170, now seen corresponding path program 1 times [2022-03-19 10:37:11,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:37:11,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1427722907] [2022-03-19 10:37:11,259 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:37:11,259 INFO L85 PathProgramCache]: Analyzing trace with hash 81990170, now seen corresponding path program 2 times [2022-03-19 10:37:11,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:37:11,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497449690] [2022-03-19 10:37:11,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:37:11,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:37:11,274 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:37:11,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1883189417] [2022-03-19 10:37:11,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:37:11,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:37:11,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:37:11,275 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) [2022-03-19 10:37:11,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 10:37:11,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:37:11,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:37:11,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-19 10:37:11,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:37:11,490 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-19 10:37:11,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:37:11,575 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-19 10:37:11,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:37:11,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497449690] [2022-03-19 10:37:11,575 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:37:11,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883189417] [2022-03-19 10:37:11,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883189417] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-19 10:37:11,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 10:37:11,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-03-19 10:37:11,576 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:37:11,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1427722907] [2022-03-19 10:37:11,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1427722907] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:37:11,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:37:11,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 10:37:11,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414366724] [2022-03-19 10:37:11,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:37:11,577 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 10:37:11,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:37:11,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 10:37:11,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-03-19 10:37:11,577 INFO L87 Difference]: Start difference. First operand 93 states and 122 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 10:37:11,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:37:11,619 INFO L93 Difference]: Finished difference Result 130 states and 179 transitions. [2022-03-19 10:37:11,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 10:37:11,620 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2022-03-19 10:37:11,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:37:11,621 INFO L225 Difference]: With dead ends: 130 [2022-03-19 10:37:11,621 INFO L226 Difference]: Without dead ends: 128 [2022-03-19 10:37:11,621 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-19 10:37:11,621 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 8 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 10:37:11,622 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 150 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 10:37:11,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-03-19 10:37:11,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 123. [2022-03-19 10:37:11,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 76 states have (on average 1.263157894736842) internal successors, (96), 77 states have internal predecessors, (96), 39 states have call successors, (39), 8 states have call predecessors, (39), 7 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-03-19 10:37:11,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 172 transitions. [2022-03-19 10:37:11,637 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 172 transitions. Word has length 47 [2022-03-19 10:37:11,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:37:11,638 INFO L478 AbstractCegarLoop]: Abstraction has 123 states and 172 transitions. [2022-03-19 10:37:11,638 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 10:37:11,638 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 172 transitions. [2022-03-19 10:37:11,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-19 10:37:11,639 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:37:11,639 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:37:11,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 10:37:11,859 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:37:11,859 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:37:11,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:37:11,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1524769911, now seen corresponding path program 1 times [2022-03-19 10:37:11,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:37:11,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [785736006] [2022-03-19 10:37:11,860 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:37:11,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1524769911, now seen corresponding path program 2 times [2022-03-19 10:37:11,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:37:11,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594162511] [2022-03-19 10:37:11,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:37:11,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:37:11,868 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:37:11,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [60171017] [2022-03-19 10:37:11,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:37:11,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:37:11,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:37:11,869 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) [2022-03-19 10:37:11,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 10:37:11,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:37:11,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:37:11,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-19 10:37:11,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:37:12,071 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 10:37:12,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:37:12,159 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 10:37:12,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:37:12,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594162511] [2022-03-19 10:37:12,159 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:37:12,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60171017] [2022-03-19 10:37:12,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60171017] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:37:12,160 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:37:12,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2022-03-19 10:37:12,160 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:37:12,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [785736006] [2022-03-19 10:37:12,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [785736006] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:37:12,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:37:12,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 10:37:12,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78422989] [2022-03-19 10:37:12,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:37:12,160 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 10:37:12,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:37:12,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 10:37:12,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-03-19 10:37:12,161 INFO L87 Difference]: Start difference. First operand 123 states and 172 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-19 10:37:12,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:37:12,268 INFO L93 Difference]: Finished difference Result 137 states and 184 transitions. [2022-03-19 10:37:12,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 10:37:12,269 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 47 [2022-03-19 10:37:12,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:37:12,270 INFO L225 Difference]: With dead ends: 137 [2022-03-19 10:37:12,270 INFO L226 Difference]: Without dead ends: 135 [2022-03-19 10:37:12,270 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-03-19 10:37:12,271 INFO L912 BasicCegarLoop]: 51 mSDtfsCounter, 36 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:37:12,271 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 256 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:37:12,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-03-19 10:37:12,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 131. [2022-03-19 10:37:12,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 82 states have (on average 1.2439024390243902) internal successors, (102), 83 states have internal predecessors, (102), 39 states have call successors, (39), 10 states have call predecessors, (39), 9 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-03-19 10:37:12,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 178 transitions. [2022-03-19 10:37:12,285 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 178 transitions. Word has length 47 [2022-03-19 10:37:12,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:37:12,285 INFO L478 AbstractCegarLoop]: Abstraction has 131 states and 178 transitions. [2022-03-19 10:37:12,285 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-19 10:37:12,285 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 178 transitions. [2022-03-19 10:37:12,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-19 10:37:12,286 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:37:12,286 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:37:12,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-19 10:37:12,497 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:37:12,498 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:37:12,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:37:12,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1836145722, now seen corresponding path program 3 times [2022-03-19 10:37:12,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:37:12,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [126863698] [2022-03-19 10:37:12,515 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:37:12,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1836145722, now seen corresponding path program 4 times [2022-03-19 10:37:12,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:37:12,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042607353] [2022-03-19 10:37:12,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:37:12,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:37:12,552 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:37:12,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1890397804] [2022-03-19 10:37:12,553 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:37:12,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:37:12,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:37:12,568 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) [2022-03-19 10:37:12,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 10:37:12,598 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:37:12,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:37:12,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-19 10:37:12,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:37:12,641 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 10:37:12,641 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 10:37:12,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:37:12,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042607353] [2022-03-19 10:37:12,641 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:37:12,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890397804] [2022-03-19 10:37:12,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890397804] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:37:12,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:37:12,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 10:37:12,642 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:37:12,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [126863698] [2022-03-19 10:37:12,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [126863698] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:37:12,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:37:12,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 10:37:12,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117465072] [2022-03-19 10:37:12,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:37:12,643 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 10:37:12,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:37:12,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 10:37:12,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 10:37:12,644 INFO L87 Difference]: Start difference. First operand 131 states and 178 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-19 10:37:12,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:37:12,690 INFO L93 Difference]: Finished difference Result 170 states and 230 transitions. [2022-03-19 10:37:12,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 10:37:12,691 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 47 [2022-03-19 10:37:12,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:37:12,693 INFO L225 Difference]: With dead ends: 170 [2022-03-19 10:37:12,693 INFO L226 Difference]: Without dead ends: 114 [2022-03-19 10:37:12,696 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-19 10:37:12,696 INFO L912 BasicCegarLoop]: 57 mSDtfsCounter, 18 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 10:37:12,696 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 180 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 10:37:12,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-03-19 10:37:12,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 106. [2022-03-19 10:37:12,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 65 states have (on average 1.1846153846153846) internal successors, (77), 66 states have internal predecessors, (77), 31 states have call successors, (31), 10 states have call predecessors, (31), 9 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-03-19 10:37:12,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 137 transitions. [2022-03-19 10:37:12,714 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 137 transitions. Word has length 47 [2022-03-19 10:37:12,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:37:12,714 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 137 transitions. [2022-03-19 10:37:12,715 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-19 10:37:12,715 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 137 transitions. [2022-03-19 10:37:12,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-19 10:37:12,715 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:37:12,716 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:37:12,737 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-19 10:37:12,936 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:37:12,936 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:37:12,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:37:12,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1952108775, now seen corresponding path program 1 times [2022-03-19 10:37:12,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:37:12,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1135234185] [2022-03-19 10:37:12,937 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:37:12,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1952108775, now seen corresponding path program 2 times [2022-03-19 10:37:12,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:37:12,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583913137] [2022-03-19 10:37:12,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:37:12,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:37:12,944 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:37:12,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [335298220] [2022-03-19 10:37:12,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:37:12,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:37:12,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:37:12,949 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:37:13,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 10:37:13,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:37:13,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:37:13,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 10:37:13,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:37:13,079 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-19 10:37:13,079 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 10:37:13,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:37:13,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583913137] [2022-03-19 10:37:13,080 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:37:13,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335298220] [2022-03-19 10:37:13,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335298220] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:37:13,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:37:13,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 10:37:13,080 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:37:13,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1135234185] [2022-03-19 10:37:13,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1135234185] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:37:13,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:37:13,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 10:37:13,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087553305] [2022-03-19 10:37:13,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:37:13,081 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 10:37:13,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:37:13,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 10:37:13,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 10:37:13,081 INFO L87 Difference]: Start difference. First operand 106 states and 137 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-19 10:37:13,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:37:13,126 INFO L93 Difference]: Finished difference Result 158 states and 221 transitions. [2022-03-19 10:37:13,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 10:37:13,127 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 52 [2022-03-19 10:37:13,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:37:13,128 INFO L225 Difference]: With dead ends: 158 [2022-03-19 10:37:13,128 INFO L226 Difference]: Without dead ends: 156 [2022-03-19 10:37:13,128 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 10:37:13,128 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 9 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 10:37:13,129 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 162 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 10:37:13,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-03-19 10:37:13,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 140. [2022-03-19 10:37:13,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 74 states have (on average 1.162162162162162) internal successors, (86), 81 states have internal predecessors, (86), 55 states have call successors, (55), 11 states have call predecessors, (55), 10 states have return successors, (53), 47 states have call predecessors, (53), 53 states have call successors, (53) [2022-03-19 10:37:13,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 194 transitions. [2022-03-19 10:37:13,144 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 194 transitions. Word has length 52 [2022-03-19 10:37:13,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:37:13,144 INFO L478 AbstractCegarLoop]: Abstraction has 140 states and 194 transitions. [2022-03-19 10:37:13,144 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-19 10:37:13,144 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 194 transitions. [2022-03-19 10:37:13,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-19 10:37:13,145 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:37:13,145 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:37:13,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-19 10:37:13,362 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:37:13,362 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:37:13,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:37:13,362 INFO L85 PathProgramCache]: Analyzing trace with hash 188363668, now seen corresponding path program 1 times [2022-03-19 10:37:13,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:37:13,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [503332999] [2022-03-19 10:37:13,363 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:37:13,363 INFO L85 PathProgramCache]: Analyzing trace with hash 188363668, now seen corresponding path program 2 times [2022-03-19 10:37:13,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:37:13,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338504133] [2022-03-19 10:37:13,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:37:13,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:37:13,370 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:37:13,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1756478887] [2022-03-19 10:37:13,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:37:13,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:37:13,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:37:13,372 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:37:13,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-19 10:37:13,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:37:13,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:37:13,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-19 10:37:13,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:37:13,898 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-19 10:37:13,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:37:14,792 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-19 10:37:14,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:37:14,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338504133] [2022-03-19 10:37:14,793 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:37:14,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756478887] [2022-03-19 10:37:14,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756478887] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:37:14,793 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:37:14,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2022-03-19 10:37:14,793 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:37:14,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [503332999] [2022-03-19 10:37:14,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [503332999] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:37:14,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:37:14,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 10:37:14,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905529677] [2022-03-19 10:37:14,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:37:14,794 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 10:37:14,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:37:14,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 10:37:14,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-03-19 10:37:14,795 INFO L87 Difference]: Start difference. First operand 140 states and 194 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-19 10:37:15,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:37:15,123 INFO L93 Difference]: Finished difference Result 200 states and 283 transitions. [2022-03-19 10:37:15,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 10:37:15,124 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 64 [2022-03-19 10:37:15,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:37:15,126 INFO L225 Difference]: With dead ends: 200 [2022-03-19 10:37:15,126 INFO L226 Difference]: Without dead ends: 197 [2022-03-19 10:37:15,127 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-03-19 10:37:15,127 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 54 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 10:37:15,127 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 385 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 10:37:15,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-03-19 10:37:15,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 193. [2022-03-19 10:37:15,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 101 states have (on average 1.1782178217821782) internal successors, (119), 110 states have internal predecessors, (119), 79 states have call successors, (79), 13 states have call predecessors, (79), 12 states have return successors, (77), 69 states have call predecessors, (77), 77 states have call successors, (77) [2022-03-19 10:37:15,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 275 transitions. [2022-03-19 10:37:15,149 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 275 transitions. Word has length 64 [2022-03-19 10:37:15,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:37:15,150 INFO L478 AbstractCegarLoop]: Abstraction has 193 states and 275 transitions. [2022-03-19 10:37:15,150 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-19 10:37:15,159 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 275 transitions. [2022-03-19 10:37:15,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-19 10:37:15,160 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:37:15,160 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:37:15,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-19 10:37:15,376 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-19 10:37:15,376 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:37:15,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:37:15,377 INFO L85 PathProgramCache]: Analyzing trace with hash -368004398, now seen corresponding path program 3 times [2022-03-19 10:37:15,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:37:15,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [29644752] [2022-03-19 10:37:15,378 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:37:15,378 INFO L85 PathProgramCache]: Analyzing trace with hash -368004398, now seen corresponding path program 4 times [2022-03-19 10:37:15,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:37:15,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786768439] [2022-03-19 10:37:15,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:37:15,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:37:15,389 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:37:15,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [806760169] [2022-03-19 10:37:15,390 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:37:15,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:37:15,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:37:15,391 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:37:15,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-19 10:37:15,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:37:15,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:37:15,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-19 10:37:15,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:37:15,532 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-19 10:37:15,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:37:15,641 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-19 10:37:15,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:37:15,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786768439] [2022-03-19 10:37:15,641 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:37:15,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806760169] [2022-03-19 10:37:15,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806760169] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:37:15,642 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:37:15,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-03-19 10:37:15,642 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:37:15,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [29644752] [2022-03-19 10:37:15,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [29644752] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:37:15,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:37:15,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 10:37:15,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975657207] [2022-03-19 10:37:15,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:37:15,643 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 10:37:15,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:37:15,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 10:37:15,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-03-19 10:37:15,643 INFO L87 Difference]: Start difference. First operand 193 states and 275 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-19 10:37:15,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:37:15,868 INFO L93 Difference]: Finished difference Result 288 states and 424 transitions. [2022-03-19 10:37:15,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 10:37:15,869 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 69 [2022-03-19 10:37:15,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:37:15,871 INFO L225 Difference]: With dead ends: 288 [2022-03-19 10:37:15,871 INFO L226 Difference]: Without dead ends: 281 [2022-03-19 10:37:15,871 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 134 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2022-03-19 10:37:15,871 INFO L912 BasicCegarLoop]: 87 mSDtfsCounter, 48 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:37:15,872 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 394 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:37:15,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-03-19 10:37:15,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 208. [2022-03-19 10:37:15,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 116 states have (on average 1.206896551724138) internal successors, (140), 122 states have internal predecessors, (140), 79 states have call successors, (79), 13 states have call predecessors, (79), 12 states have return successors, (77), 72 states have call predecessors, (77), 77 states have call successors, (77) [2022-03-19 10:37:15,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 296 transitions. [2022-03-19 10:37:15,897 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 296 transitions. Word has length 69 [2022-03-19 10:37:15,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:37:15,897 INFO L478 AbstractCegarLoop]: Abstraction has 208 states and 296 transitions. [2022-03-19 10:37:15,897 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-19 10:37:15,897 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 296 transitions. [2022-03-19 10:37:15,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-19 10:37:15,898 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:37:15,898 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:37:15,925 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-03-19 10:37:16,125 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-19 10:37:16,126 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:37:16,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:37:16,126 INFO L85 PathProgramCache]: Analyzing trace with hash -298771846, now seen corresponding path program 1 times [2022-03-19 10:37:16,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:37:16,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [495945821] [2022-03-19 10:37:16,126 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:37:16,126 INFO L85 PathProgramCache]: Analyzing trace with hash -298771846, now seen corresponding path program 2 times [2022-03-19 10:37:16,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:37:16,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994009979] [2022-03-19 10:37:16,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:37:16,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:37:16,146 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:37:16,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [745256847] [2022-03-19 10:37:16,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:37:16,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:37:16,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:37:16,151 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:37:16,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-19 10:37:16,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:37:16,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:37:16,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-19 10:37:16,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:37:16,536 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 17 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-03-19 10:37:16,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:37:16,717 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-03-19 10:37:16,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:37:16,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994009979] [2022-03-19 10:37:16,717 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:37:16,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745256847] [2022-03-19 10:37:16,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745256847] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-19 10:37:16,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 10:37:16,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12] total 14 [2022-03-19 10:37:16,718 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:37:16,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [495945821] [2022-03-19 10:37:16,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [495945821] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:37:16,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:37:16,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 10:37:16,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218357735] [2022-03-19 10:37:16,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:37:16,718 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 10:37:16,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:37:16,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 10:37:16,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-03-19 10:37:16,719 INFO L87 Difference]: Start difference. First operand 208 states and 296 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-03-19 10:37:16,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:37:16,778 INFO L93 Difference]: Finished difference Result 214 states and 301 transitions. [2022-03-19 10:37:16,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 10:37:16,779 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 74 [2022-03-19 10:37:16,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:37:16,780 INFO L225 Difference]: With dead ends: 214 [2022-03-19 10:37:16,780 INFO L226 Difference]: Without dead ends: 212 [2022-03-19 10:37:16,780 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-03-19 10:37:16,780 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 13 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 10:37:16,781 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 145 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 10:37:16,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-03-19 10:37:16,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2022-03-19 10:37:16,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 119 states have (on average 1.2016806722689075) internal successors, (143), 125 states have internal predecessors, (143), 79 states have call successors, (79), 14 states have call predecessors, (79), 13 states have return successors, (77), 72 states have call predecessors, (77), 77 states have call successors, (77) [2022-03-19 10:37:16,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 299 transitions. [2022-03-19 10:37:16,808 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 299 transitions. Word has length 74 [2022-03-19 10:37:16,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:37:16,809 INFO L478 AbstractCegarLoop]: Abstraction has 212 states and 299 transitions. [2022-03-19 10:37:16,809 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-03-19 10:37:16,809 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 299 transitions. [2022-03-19 10:37:16,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-03-19 10:37:16,809 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:37:16,809 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:37:16,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-19 10:37:17,026 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-19 10:37:17,026 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:37:17,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:37:17,027 INFO L85 PathProgramCache]: Analyzing trace with hash -2089538094, now seen corresponding path program 1 times [2022-03-19 10:37:17,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:37:17,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [132904592] [2022-03-19 10:37:17,027 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:37:17,027 INFO L85 PathProgramCache]: Analyzing trace with hash -2089538094, now seen corresponding path program 2 times [2022-03-19 10:37:17,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:37:17,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820914635] [2022-03-19 10:37:17,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:37:17,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:37:17,034 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:37:17,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [327481949] [2022-03-19 10:37:17,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:37:17,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:37:17,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:37:17,035 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:37:17,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-19 10:37:17,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:37:17,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:37:17,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-19 10:37:17,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:37:17,192 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-03-19 10:37:17,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:37:17,329 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-03-19 10:37:17,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:37:17,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820914635] [2022-03-19 10:37:17,330 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:37:17,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327481949] [2022-03-19 10:37:17,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327481949] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:37:17,330 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:37:17,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-19 10:37:17,330 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:37:17,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [132904592] [2022-03-19 10:37:17,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [132904592] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:37:17,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:37:17,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 10:37:17,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733888604] [2022-03-19 10:37:17,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:37:17,331 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 10:37:17,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:37:17,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 10:37:17,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-19 10:37:17,331 INFO L87 Difference]: Start difference. First operand 212 states and 299 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-19 10:37:17,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:37:17,515 INFO L93 Difference]: Finished difference Result 226 states and 310 transitions. [2022-03-19 10:37:17,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 10:37:17,515 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 72 [2022-03-19 10:37:17,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:37:17,516 INFO L225 Difference]: With dead ends: 226 [2022-03-19 10:37:17,516 INFO L226 Difference]: Without dead ends: 224 [2022-03-19 10:37:17,516 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-19 10:37:17,517 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 21 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:37:17,517 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 196 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:37:17,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-03-19 10:37:17,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2022-03-19 10:37:17,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 128 states have (on average 1.1875) internal successors, (152), 134 states have internal predecessors, (152), 79 states have call successors, (79), 17 states have call predecessors, (79), 16 states have return successors, (77), 72 states have call predecessors, (77), 77 states have call successors, (77) [2022-03-19 10:37:17,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 308 transitions. [2022-03-19 10:37:17,544 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 308 transitions. Word has length 72 [2022-03-19 10:37:17,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:37:17,544 INFO L478 AbstractCegarLoop]: Abstraction has 224 states and 308 transitions. [2022-03-19 10:37:17,544 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-19 10:37:17,544 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 308 transitions. [2022-03-19 10:37:17,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-19 10:37:17,545 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:37:17,545 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:37:17,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-19 10:37:17,760 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-19 10:37:17,760 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:37:17,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:37:17,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1984914564, now seen corresponding path program 3 times [2022-03-19 10:37:17,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:37:17,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [927991161] [2022-03-19 10:37:17,761 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:37:17,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1984914564, now seen corresponding path program 4 times [2022-03-19 10:37:17,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:37:17,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453006553] [2022-03-19 10:37:17,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:37:17,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:37:17,770 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:37:17,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [698379036] [2022-03-19 10:37:17,771 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:37:17,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:37:17,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:37:17,773 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:37:17,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-19 10:37:17,832 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:37:17,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:37:17,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 10:37:17,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:37:17,925 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-19 10:37:17,925 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 10:37:17,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:37:17,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453006553] [2022-03-19 10:37:17,925 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:37:17,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698379036] [2022-03-19 10:37:17,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698379036] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:37:17,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:37:17,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 10:37:17,925 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:37:17,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [927991161] [2022-03-19 10:37:17,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [927991161] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:37:17,926 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:37:17,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 10:37:17,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476963398] [2022-03-19 10:37:17,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:37:17,926 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 10:37:17,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:37:17,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 10:37:17,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-19 10:37:17,927 INFO L87 Difference]: Start difference. First operand 224 states and 308 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-03-19 10:37:17,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:37:17,986 INFO L93 Difference]: Finished difference Result 367 states and 500 transitions. [2022-03-19 10:37:17,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 10:37:17,986 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 77 [2022-03-19 10:37:17,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:37:17,987 INFO L225 Difference]: With dead ends: 367 [2022-03-19 10:37:17,988 INFO L226 Difference]: Without dead ends: 230 [2022-03-19 10:37:17,988 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-19 10:37:17,989 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 3 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 10:37:17,989 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 148 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 10:37:17,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-03-19 10:37:18,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 214. [2022-03-19 10:37:18,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 126 states have (on average 1.1825396825396826) internal successors, (149), 127 states have internal predecessors, (149), 71 states have call successors, (71), 17 states have call predecessors, (71), 16 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) [2022-03-19 10:37:18,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 289 transitions. [2022-03-19 10:37:18,018 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 289 transitions. Word has length 77 [2022-03-19 10:37:18,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:37:18,018 INFO L478 AbstractCegarLoop]: Abstraction has 214 states and 289 transitions. [2022-03-19 10:37:18,018 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-03-19 10:37:18,018 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 289 transitions. [2022-03-19 10:37:18,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-19 10:37:18,021 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:37:18,021 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:37:18,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-19 10:37:18,238 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-19 10:37:18,238 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:37:18,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:37:18,238 INFO L85 PathProgramCache]: Analyzing trace with hash -867272991, now seen corresponding path program 5 times [2022-03-19 10:37:18,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:37:18,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1949021780] [2022-03-19 10:37:18,239 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:37:18,239 INFO L85 PathProgramCache]: Analyzing trace with hash -867272991, now seen corresponding path program 6 times [2022-03-19 10:37:18,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:37:18,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732616202] [2022-03-19 10:37:18,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:37:18,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:37:18,245 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:37:18,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1825753339] [2022-03-19 10:37:18,245 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 10:37:18,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:37:18,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:37:18,252 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:37:18,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-19 10:37:18,313 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 10:37:18,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:37:18,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-19 10:37:18,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:37:18,894 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 12 proven. 32 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-19 10:37:18,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:37:19,378 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 18 proven. 26 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-19 10:37:19,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:37:19,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732616202] [2022-03-19 10:37:19,378 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:37:19,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825753339] [2022-03-19 10:37:19,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825753339] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:37:19,378 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:37:19,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 24 [2022-03-19 10:37:19,379 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:37:19,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1949021780] [2022-03-19 10:37:19,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1949021780] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:37:19,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:37:19,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 10:37:19,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44456189] [2022-03-19 10:37:19,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:37:19,379 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 10:37:19,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:37:19,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 10:37:19,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2022-03-19 10:37:19,380 INFO L87 Difference]: Start difference. First operand 214 states and 289 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-19 10:37:19,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:37:19,856 INFO L93 Difference]: Finished difference Result 285 states and 377 transitions. [2022-03-19 10:37:19,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 10:37:19,856 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 77 [2022-03-19 10:37:19,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:37:19,857 INFO L225 Difference]: With dead ends: 285 [2022-03-19 10:37:19,857 INFO L226 Difference]: Without dead ends: 283 [2022-03-19 10:37:19,858 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2022-03-19 10:37:19,858 INFO L912 BasicCegarLoop]: 50 mSDtfsCounter, 64 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 10:37:19,858 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 504 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 10:37:19,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-03-19 10:37:19,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 265. [2022-03-19 10:37:19,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 157 states have (on average 1.178343949044586) internal successors, (185), 158 states have internal predecessors, (185), 87 states have call successors, (87), 21 states have call predecessors, (87), 20 states have return successors, (85), 85 states have call predecessors, (85), 85 states have call successors, (85) [2022-03-19 10:37:19,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 357 transitions. [2022-03-19 10:37:19,913 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 357 transitions. Word has length 77 [2022-03-19 10:37:19,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:37:19,913 INFO L478 AbstractCegarLoop]: Abstraction has 265 states and 357 transitions. [2022-03-19 10:37:19,913 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-19 10:37:19,914 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 357 transitions. [2022-03-19 10:37:19,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-19 10:37:19,915 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:37:19,915 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:37:19,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-19 10:37:20,119 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-19 10:37:20,120 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:37:20,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:37:20,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1679616651, now seen corresponding path program 1 times [2022-03-19 10:37:20,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:37:20,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1274612642] [2022-03-19 10:37:20,121 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:37:20,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1679616651, now seen corresponding path program 2 times [2022-03-19 10:37:20,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:37:20,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283995193] [2022-03-19 10:37:20,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:37:20,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:37:20,134 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:37:20,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1550415020] [2022-03-19 10:37:20,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:37:20,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:37:20,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:37:20,148 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:37:20,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-19 10:37:20,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:37:20,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:37:20,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-19 10:37:20,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:37:20,743 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 41 proven. 21 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-03-19 10:37:20,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:37:21,404 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 36 proven. 11 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-03-19 10:37:21,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:37:21,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283995193] [2022-03-19 10:37:21,404 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:37:21,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550415020] [2022-03-19 10:37:21,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550415020] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:37:21,404 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:37:21,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2022-03-19 10:37:21,405 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:37:21,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1274612642] [2022-03-19 10:37:21,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1274612642] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:37:21,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:37:21,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 10:37:21,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462850077] [2022-03-19 10:37:21,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:37:21,405 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 10:37:21,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:37:21,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 10:37:21,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-03-19 10:37:21,406 INFO L87 Difference]: Start difference. First operand 265 states and 357 transitions. Second operand has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-03-19 10:37:22,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:37:22,029 INFO L93 Difference]: Finished difference Result 348 states and 475 transitions. [2022-03-19 10:37:22,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 10:37:22,029 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 86 [2022-03-19 10:37:22,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:37:22,031 INFO L225 Difference]: With dead ends: 348 [2022-03-19 10:37:22,031 INFO L226 Difference]: Without dead ends: 345 [2022-03-19 10:37:22,033 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 148 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2022-03-19 10:37:22,034 INFO L912 BasicCegarLoop]: 52 mSDtfsCounter, 56 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 10:37:22,034 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 486 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 10:37:22,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-03-19 10:37:22,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 330. [2022-03-19 10:37:22,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 191 states have (on average 1.193717277486911) internal successors, (228), 192 states have internal predecessors, (228), 115 states have call successors, (115), 24 states have call predecessors, (115), 23 states have return successors, (113), 113 states have call predecessors, (113), 113 states have call successors, (113) [2022-03-19 10:37:22,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 456 transitions. [2022-03-19 10:37:22,099 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 456 transitions. Word has length 86 [2022-03-19 10:37:22,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:37:22,100 INFO L478 AbstractCegarLoop]: Abstraction has 330 states and 456 transitions. [2022-03-19 10:37:22,100 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-03-19 10:37:22,100 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 456 transitions. [2022-03-19 10:37:22,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-19 10:37:22,102 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:37:22,102 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:37:22,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-19 10:37:22,319 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:37:22,319 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:37:22,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:37:22,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1455197645, now seen corresponding path program 3 times [2022-03-19 10:37:22,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:37:22,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1109496771] [2022-03-19 10:37:22,320 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:37:22,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1455197645, now seen corresponding path program 4 times [2022-03-19 10:37:22,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:37:22,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213386662] [2022-03-19 10:37:22,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:37:22,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:37:22,326 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:37:22,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [865895479] [2022-03-19 10:37:22,326 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:37:22,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:37:22,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:37:22,328 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:37:22,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-19 10:37:22,376 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:37:22,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:37:22,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 86 conjunts are in the unsatisfiable core [2022-03-19 10:37:22,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:37:23,438 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-19 10:37:23,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:37:30,414 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 61 proven. 17 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-03-19 10:37:30,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:37:30,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213386662] [2022-03-19 10:37:30,415 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:37:30,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865895479] [2022-03-19 10:37:30,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865895479] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:37:30,415 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:37:30,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 30 [2022-03-19 10:37:30,415 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:37:30,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1109496771] [2022-03-19 10:37:30,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1109496771] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:37:30,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:37:30,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-19 10:37:30,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073093332] [2022-03-19 10:37:30,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:37:30,416 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-19 10:37:30,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:37:30,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-19 10:37:30,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2022-03-19 10:37:30,417 INFO L87 Difference]: Start difference. First operand 330 states and 456 transitions. Second operand has 19 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-19 10:37:31,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:37:31,803 INFO L93 Difference]: Finished difference Result 422 states and 582 transitions. [2022-03-19 10:37:31,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-19 10:37:31,804 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) Word has length 91 [2022-03-19 10:37:31,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:37:31,806 INFO L225 Difference]: With dead ends: 422 [2022-03-19 10:37:31,807 INFO L226 Difference]: Without dead ends: 419 [2022-03-19 10:37:31,807 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 150 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=230, Invalid=1176, Unknown=0, NotChecked=0, Total=1406 [2022-03-19 10:37:31,808 INFO L912 BasicCegarLoop]: 59 mSDtfsCounter, 73 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 975 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 718 SdHoareTripleChecker+Invalid, 1058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 10:37:31,809 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 718 Invalid, 1058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 975 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 10:37:31,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2022-03-19 10:37:31,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 399. [2022-03-19 10:37:31,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 228 states have (on average 1.2017543859649122) internal successors, (274), 229 states have internal predecessors, (274), 143 states have call successors, (143), 28 states have call predecessors, (143), 27 states have return successors, (141), 141 states have call predecessors, (141), 141 states have call successors, (141) [2022-03-19 10:37:31,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 558 transitions. [2022-03-19 10:37:31,890 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 558 transitions. Word has length 91 [2022-03-19 10:37:31,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:37:31,892 INFO L478 AbstractCegarLoop]: Abstraction has 399 states and 558 transitions. [2022-03-19 10:37:31,892 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-19 10:37:31,892 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 558 transitions. [2022-03-19 10:37:31,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 10:37:31,893 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:37:31,893 INFO L500 BasicCegarLoop]: trace histogram [10, 9, 9, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:37:31,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-19 10:37:32,108 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-19 10:37:32,109 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:37:32,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:37:32,109 INFO L85 PathProgramCache]: Analyzing trace with hash -100199667, now seen corresponding path program 7 times [2022-03-19 10:37:32,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:37:32,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [890971081] [2022-03-19 10:37:32,110 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:37:32,110 INFO L85 PathProgramCache]: Analyzing trace with hash -100199667, now seen corresponding path program 8 times [2022-03-19 10:37:32,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:37:32,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783929015] [2022-03-19 10:37:32,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:37:32,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:37:32,118 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:37:32,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1620903780] [2022-03-19 10:37:32,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:37:32,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:37:32,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:37:32,119 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:37:32,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-19 10:37:32,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:37:32,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:37:32,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 96 conjunts are in the unsatisfiable core [2022-03-19 10:37:32,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:37:32,448 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:37:32,806 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:37:32,870 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 37 proven. 81 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-03-19 10:37:32,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:37:33,482 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 78 proven. 18 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-03-19 10:37:33,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:37:33,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783929015] [2022-03-19 10:37:33,482 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:37:33,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620903780] [2022-03-19 10:37:33,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620903780] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:37:33,483 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:37:33,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12] total 26 [2022-03-19 10:37:33,483 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:37:33,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [890971081] [2022-03-19 10:37:33,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [890971081] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:37:33,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:37:33,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-19 10:37:33,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638610649] [2022-03-19 10:37:33,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:37:33,483 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-19 10:37:33,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:37:33,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-19 10:37:33,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-03-19 10:37:33,484 INFO L87 Difference]: Start difference. First operand 399 states and 558 transitions. Second operand has 19 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 7 states have call successors, (14) [2022-03-19 10:37:34,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:37:34,118 INFO L93 Difference]: Finished difference Result 474 states and 649 transitions. [2022-03-19 10:37:34,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 10:37:34,119 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 7 states have call successors, (14) Word has length 102 [2022-03-19 10:37:34,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:37:34,121 INFO L225 Difference]: With dead ends: 474 [2022-03-19 10:37:34,121 INFO L226 Difference]: Without dead ends: 472 [2022-03-19 10:37:34,122 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 176 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2022-03-19 10:37:34,122 INFO L912 BasicCegarLoop]: 49 mSDtfsCounter, 71 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 10:37:34,122 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 550 Invalid, 808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 746 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 10:37:34,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2022-03-19 10:37:34,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 454. [2022-03-19 10:37:34,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 262 states have (on average 1.1946564885496183) internal successors, (313), 263 states have internal predecessors, (313), 159 states have call successors, (159), 33 states have call predecessors, (159), 32 states have return successors, (157), 157 states have call predecessors, (157), 157 states have call successors, (157) [2022-03-19 10:37:34,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 629 transitions. [2022-03-19 10:37:34,226 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 629 transitions. Word has length 102 [2022-03-19 10:37:34,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:37:34,226 INFO L478 AbstractCegarLoop]: Abstraction has 454 states and 629 transitions. [2022-03-19 10:37:34,227 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 7 states have call successors, (14) [2022-03-19 10:37:34,227 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 629 transitions. [2022-03-19 10:37:34,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-03-19 10:37:34,228 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:37:34,228 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:37:34,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-19 10:37:34,461 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-19 10:37:34,462 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:37:34,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:37:34,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1948981098, now seen corresponding path program 5 times [2022-03-19 10:37:34,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:37:34,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [798232990] [2022-03-19 10:37:34,463 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:37:34,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1948981098, now seen corresponding path program 6 times [2022-03-19 10:37:34,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:37:34,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233274666] [2022-03-19 10:37:34,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:37:34,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:37:34,473 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:37:34,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1241078724] [2022-03-19 10:37:34,474 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 10:37:34,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:37:34,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:37:34,476 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:37:34,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-19 10:37:34,531 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 10:37:34,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:37:34,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-19 10:37:34,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:37:34,998 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:37:35,112 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 57 proven. 33 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2022-03-19 10:37:35,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:37:35,279 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:38:27,630 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:38:37,781 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:39:00,648 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:39:10,716 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:41:22,374 WARN L855 $PredicateComparison]: unable to prove that (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (forall ((v_main_~d~0_BEFORE_CALL_76 Int) (v_main_~y~0_BEFORE_CALL_104 Int) (v_main_~x~0_BEFORE_CALL_105 Int) (v_main_~p~0_BEFORE_CALL_83 Int) (v_main_~k~0_BEFORE_CALL_78 Int) (v_main_~r~0_BEFORE_CALL_83 Int) (v_main_~s~0_BEFORE_CALL_91 Int) (v_main_~q~0_BEFORE_CALL_93 Int) (v_main_~b~0_BEFORE_CALL_114 Int)) (let ((.cse0 (* v_main_~d~0_BEFORE_CALL_76 v_main_~b~0_BEFORE_CALL_114))) (or (= (mod .cse0 v_main_~b~0_BEFORE_CALL_114) 0) (= (+ (* v_main_~y~0_BEFORE_CALL_104 v_main_~k~0_BEFORE_CALL_78 v_main_~s~0_BEFORE_CALL_91) (* v_main_~y~0_BEFORE_CALL_104 v_main_~s~0_BEFORE_CALL_91) (* v_main_~d~0_BEFORE_CALL_76 v_main_~y~0_BEFORE_CALL_104 v_main_~s~0_BEFORE_CALL_91) (* v_main_~q~0_BEFORE_CALL_93 v_main_~x~0_BEFORE_CALL_105 v_main_~k~0_BEFORE_CALL_78) (* v_main_~q~0_BEFORE_CALL_93 v_main_~d~0_BEFORE_CALL_76 v_main_~x~0_BEFORE_CALL_105) (* v_main_~q~0_BEFORE_CALL_93 v_main_~x~0_BEFORE_CALL_105)) (+ (* v_main_~r~0_BEFORE_CALL_83 v_main_~y~0_BEFORE_CALL_104) (* v_main_~p~0_BEFORE_CALL_83 v_main_~x~0_BEFORE_CALL_105) v_main_~b~0_BEFORE_CALL_114)) (<= .cse0 0)))))) is different from true [2022-03-19 10:41:55,879 WARN L855 $PredicateComparison]: unable to prove that (or (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (forall ((v_main_~d~0_BEFORE_CALL_76 Int) (v_main_~y~0_BEFORE_CALL_104 Int) (v_main_~x~0_BEFORE_CALL_105 Int) (v_main_~p~0_BEFORE_CALL_83 Int) (v_main_~k~0_BEFORE_CALL_78 Int) (v_main_~r~0_BEFORE_CALL_83 Int) (v_main_~s~0_BEFORE_CALL_91 Int) (v_main_~q~0_BEFORE_CALL_93 Int) (v_main_~b~0_BEFORE_CALL_114 Int)) (let ((.cse0 (* v_main_~d~0_BEFORE_CALL_76 v_main_~b~0_BEFORE_CALL_114))) (or (= (mod .cse0 v_main_~b~0_BEFORE_CALL_114) 0) (= (+ (* v_main_~y~0_BEFORE_CALL_104 v_main_~k~0_BEFORE_CALL_78 v_main_~s~0_BEFORE_CALL_91) (* v_main_~y~0_BEFORE_CALL_104 v_main_~s~0_BEFORE_CALL_91) (* v_main_~d~0_BEFORE_CALL_76 v_main_~y~0_BEFORE_CALL_104 v_main_~s~0_BEFORE_CALL_91) (* v_main_~q~0_BEFORE_CALL_93 v_main_~x~0_BEFORE_CALL_105 v_main_~k~0_BEFORE_CALL_78) (* v_main_~q~0_BEFORE_CALL_93 v_main_~d~0_BEFORE_CALL_76 v_main_~x~0_BEFORE_CALL_105) (* v_main_~q~0_BEFORE_CALL_93 v_main_~x~0_BEFORE_CALL_105)) (+ (* v_main_~r~0_BEFORE_CALL_83 v_main_~y~0_BEFORE_CALL_104) (* v_main_~p~0_BEFORE_CALL_83 v_main_~x~0_BEFORE_CALL_105) v_main_~b~0_BEFORE_CALL_114)) (<= .cse0 0)))))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-03-19 10:42:13,922 WARN L855 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (forall ((v_main_~d~0_BEFORE_CALL_76 Int) (v_main_~y~0_BEFORE_CALL_104 Int) (v_main_~x~0_BEFORE_CALL_105 Int) (v_main_~p~0_BEFORE_CALL_83 Int) (v_main_~k~0_BEFORE_CALL_78 Int) (v_main_~r~0_BEFORE_CALL_83 Int) (v_main_~s~0_BEFORE_CALL_91 Int) (v_main_~q~0_BEFORE_CALL_93 Int) (v_main_~b~0_BEFORE_CALL_114 Int)) (let ((.cse0 (* v_main_~d~0_BEFORE_CALL_76 v_main_~b~0_BEFORE_CALL_114))) (or (= (mod .cse0 v_main_~b~0_BEFORE_CALL_114) 0) (= (+ (* v_main_~y~0_BEFORE_CALL_104 v_main_~k~0_BEFORE_CALL_78 v_main_~s~0_BEFORE_CALL_91) (* v_main_~y~0_BEFORE_CALL_104 v_main_~s~0_BEFORE_CALL_91) (* v_main_~d~0_BEFORE_CALL_76 v_main_~y~0_BEFORE_CALL_104 v_main_~s~0_BEFORE_CALL_91) (* v_main_~q~0_BEFORE_CALL_93 v_main_~x~0_BEFORE_CALL_105 v_main_~k~0_BEFORE_CALL_78) (* v_main_~q~0_BEFORE_CALL_93 v_main_~d~0_BEFORE_CALL_76 v_main_~x~0_BEFORE_CALL_105) (* v_main_~q~0_BEFORE_CALL_93 v_main_~x~0_BEFORE_CALL_105)) (+ (* v_main_~r~0_BEFORE_CALL_83 v_main_~y~0_BEFORE_CALL_104) (* v_main_~p~0_BEFORE_CALL_83 v_main_~x~0_BEFORE_CALL_105) v_main_~b~0_BEFORE_CALL_114)) (<= .cse0 0))))) is different from true [2022-03-19 10:42:14,682 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 71 proven. 34 refuted. 0 times theorem prover too weak. 224 trivial. 5 not checked. [2022-03-19 10:42:14,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:42:14,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233274666] [2022-03-19 10:42:14,682 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:42:14,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241078724] [2022-03-19 10:42:14,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241078724] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:42:14,682 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:42:14,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 25 [2022-03-19 10:42:14,691 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:42:14,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [798232990] [2022-03-19 10:42:14,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [798232990] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:42:14,691 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:42:14,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 10:42:14,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159788266] [2022-03-19 10:42:14,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:42:14,691 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 10:42:14,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:42:14,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 10:42:14,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=390, Unknown=3, NotChecked=126, Total=600 [2022-03-19 10:42:14,692 INFO L87 Difference]: Start difference. First operand 454 states and 629 transitions. Second operand has 13 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2022-03-19 10:42:15,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:42:15,217 INFO L93 Difference]: Finished difference Result 530 states and 735 transitions. [2022-03-19 10:42:15,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 10:42:15,218 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) Word has length 108 [2022-03-19 10:42:15,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:42:15,220 INFO L225 Difference]: With dead ends: 530 [2022-03-19 10:42:15,220 INFO L226 Difference]: Without dead ends: 527 [2022-03-19 10:42:15,221 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 190 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=149, Invalid=672, Unknown=3, NotChecked=168, Total=992 [2022-03-19 10:42:15,221 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 48 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 10:42:15,221 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 402 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 10:42:15,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2022-03-19 10:42:15,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 448. [2022-03-19 10:42:15,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 260 states have (on average 1.1923076923076923) internal successors, (310), 261 states have internal predecessors, (310), 155 states have call successors, (155), 33 states have call predecessors, (155), 32 states have return successors, (153), 153 states have call predecessors, (153), 153 states have call successors, (153) [2022-03-19 10:42:15,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 618 transitions. [2022-03-19 10:42:15,305 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 618 transitions. Word has length 108 [2022-03-19 10:42:15,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:42:15,305 INFO L478 AbstractCegarLoop]: Abstraction has 448 states and 618 transitions. [2022-03-19 10:42:15,305 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2022-03-19 10:42:15,305 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 618 transitions. [2022-03-19 10:42:15,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-03-19 10:42:15,307 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:42:15,307 INFO L500 BasicCegarLoop]: trace histogram [10, 9, 9, 6, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:42:15,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-19 10:42:15,520 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-19 10:42:15,521 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:42:15,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:42:15,521 INFO L85 PathProgramCache]: Analyzing trace with hash 826422219, now seen corresponding path program 9 times [2022-03-19 10:42:15,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:42:15,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1471956260] [2022-03-19 10:42:15,521 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:42:15,522 INFO L85 PathProgramCache]: Analyzing trace with hash 826422219, now seen corresponding path program 10 times [2022-03-19 10:42:15,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:42:15,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588772958] [2022-03-19 10:42:15,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:42:15,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:42:15,527 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:42:15,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1314351863] [2022-03-19 10:42:15,528 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:42:15,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:42:15,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:42:15,529 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:42:15,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-19 10:42:15,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:42:15,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:42:15,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 104 conjunts are in the unsatisfiable core [2022-03-19 10:42:15,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:42:16,700 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 22 proven. 114 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-03-19 10:42:16,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:42:17,163 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 78 proven. 27 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-03-19 10:42:17,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:42:17,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588772958] [2022-03-19 10:42:17,164 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:42:17,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314351863] [2022-03-19 10:42:17,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314351863] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:42:17,164 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:42:17,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 12] total 28 [2022-03-19 10:42:17,165 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:42:17,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1471956260] [2022-03-19 10:42:17,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1471956260] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:42:17,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:42:17,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-19 10:42:17,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241402566] [2022-03-19 10:42:17,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:42:17,165 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-19 10:42:17,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:42:17,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-19 10:42:17,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2022-03-19 10:42:17,166 INFO L87 Difference]: Start difference. First operand 448 states and 618 transitions. Second operand has 21 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 8 states have call successors, (14) [2022-03-19 10:42:18,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:42:18,027 INFO L93 Difference]: Finished difference Result 523 states and 710 transitions. [2022-03-19 10:42:18,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-19 10:42:18,028 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 8 states have call successors, (14) Word has length 107 [2022-03-19 10:42:18,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:42:18,030 INFO L225 Difference]: With dead ends: 523 [2022-03-19 10:42:18,030 INFO L226 Difference]: Without dead ends: 521 [2022-03-19 10:42:18,031 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 185 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=163, Invalid=959, Unknown=0, NotChecked=0, Total=1122 [2022-03-19 10:42:18,031 INFO L912 BasicCegarLoop]: 58 mSDtfsCounter, 70 mSDsluCounter, 776 mSDsCounter, 0 mSdLazyCounter, 1187 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 834 SdHoareTripleChecker+Invalid, 1233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 10:42:18,032 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 834 Invalid, 1233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1187 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 10:42:18,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2022-03-19 10:42:18,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 499. [2022-03-19 10:42:18,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 291 states have (on average 1.1890034364261168) internal successors, (346), 292 states have internal predecessors, (346), 171 states have call successors, (171), 37 states have call predecessors, (171), 36 states have return successors, (169), 169 states have call predecessors, (169), 169 states have call successors, (169) [2022-03-19 10:42:18,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 686 transitions. [2022-03-19 10:42:18,122 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 686 transitions. Word has length 107 [2022-03-19 10:42:18,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:42:18,122 INFO L478 AbstractCegarLoop]: Abstraction has 499 states and 686 transitions. [2022-03-19 10:42:18,122 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 8 states have call successors, (14) [2022-03-19 10:42:18,122 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 686 transitions. [2022-03-19 10:42:18,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-03-19 10:42:18,123 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:42:18,123 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:42:18,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-19 10:42:18,340 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:42:18,340 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:42:18,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:42:18,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1002671399, now seen corresponding path program 7 times [2022-03-19 10:42:18,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:42:18,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1671835434] [2022-03-19 10:42:18,341 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:42:18,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1002671399, now seen corresponding path program 8 times [2022-03-19 10:42:18,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:42:18,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880486741] [2022-03-19 10:42:18,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:42:18,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:42:18,347 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:42:18,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [612016629] [2022-03-19 10:42:18,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:42:18,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:42:18,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:42:18,392 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:42:18,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-19 10:42:18,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:42:18,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:42:18,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 68 conjunts are in the unsatisfiable core [2022-03-19 10:42:18,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:42:19,294 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:42:19,556 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 90 proven. 42 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2022-03-19 10:42:19,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:42:20,027 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:42:20,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:42:20,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880486741] [2022-03-19 10:42:20,592 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:42:20,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612016629] [2022-03-19 10:42:20,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612016629] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 10:42:20,592 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 10:42:20,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-03-19 10:42:20,592 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:42:20,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1671835434] [2022-03-19 10:42:20,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1671835434] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:42:20,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:42:20,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-19 10:42:20,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095064807] [2022-03-19 10:42:20,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:42:20,593 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 10:42:20,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:42:20,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 10:42:20,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-03-19 10:42:20,593 INFO L87 Difference]: Start difference. First operand 499 states and 686 transitions. Second operand has 18 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-19 10:42:22,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:42:22,471 INFO L93 Difference]: Finished difference Result 588 states and 809 transitions. [2022-03-19 10:42:22,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 10:42:22,483 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) Word has length 111 [2022-03-19 10:42:22,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:42:22,486 INFO L225 Difference]: With dead ends: 588 [2022-03-19 10:42:22,486 INFO L226 Difference]: Without dead ends: 585 [2022-03-19 10:42:22,486 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2022-03-19 10:42:22,488 INFO L912 BasicCegarLoop]: 53 mSDtfsCounter, 45 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 939 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-19 10:42:22,488 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 725 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 939 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-19 10:42:22,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2022-03-19 10:42:22,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 528. [2022-03-19 10:42:22,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 306 states have (on average 1.1928104575163399) internal successors, (365), 307 states have internal predecessors, (365), 183 states have call successors, (183), 39 states have call predecessors, (183), 38 states have return successors, (181), 181 states have call predecessors, (181), 181 states have call successors, (181) [2022-03-19 10:42:22,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 729 transitions. [2022-03-19 10:42:22,608 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 729 transitions. Word has length 111 [2022-03-19 10:42:22,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:42:22,609 INFO L478 AbstractCegarLoop]: Abstraction has 528 states and 729 transitions. [2022-03-19 10:42:22,609 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-19 10:42:22,609 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 729 transitions. [2022-03-19 10:42:22,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-19 10:42:22,610 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:42:22,610 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:42:22,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-19 10:42:22,829 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:42:22,829 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:42:22,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:42:22,830 INFO L85 PathProgramCache]: Analyzing trace with hash 890766036, now seen corresponding path program 9 times [2022-03-19 10:42:22,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:42:22,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [3070694] [2022-03-19 10:42:22,830 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:42:22,830 INFO L85 PathProgramCache]: Analyzing trace with hash 890766036, now seen corresponding path program 10 times [2022-03-19 10:42:22,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:42:22,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49649199] [2022-03-19 10:42:22,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:42:22,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:42:22,836 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:42:22,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [48449502] [2022-03-19 10:42:22,837 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:42:22,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:42:22,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:42:22,840 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:42:22,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-19 10:42:22,887 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:42:22,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:42:22,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 99 conjunts are in the unsatisfiable core [2022-03-19 10:42:22,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:42:24,219 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 106 proven. 63 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2022-03-19 10:42:24,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:42:31,770 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 105 proven. 29 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2022-03-19 10:42:31,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:42:31,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49649199] [2022-03-19 10:42:31,771 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:42:31,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48449502] [2022-03-19 10:42:31,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48449502] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:42:31,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:42:31,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17] total 34 [2022-03-19 10:42:31,771 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:42:31,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [3070694] [2022-03-19 10:42:31,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [3070694] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:42:31,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:42:31,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-19 10:42:31,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569818979] [2022-03-19 10:42:31,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:42:31,772 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-19 10:42:31,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:42:31,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-19 10:42:31,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=940, Unknown=0, NotChecked=0, Total=1122 [2022-03-19 10:42:31,772 INFO L87 Difference]: Start difference. First operand 528 states and 729 transitions. Second operand has 22 states, 20 states have (on average 2.05) internal successors, (41), 19 states have internal predecessors, (41), 8 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 7 states have call successors, (17) [2022-03-19 10:42:33,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:42:33,069 INFO L93 Difference]: Finished difference Result 644 states and 877 transitions. [2022-03-19 10:42:33,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-19 10:42:33,070 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.05) internal successors, (41), 19 states have internal predecessors, (41), 8 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 7 states have call successors, (17) Word has length 113 [2022-03-19 10:42:33,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:42:33,072 INFO L225 Difference]: With dead ends: 644 [2022-03-19 10:42:33,072 INFO L226 Difference]: Without dead ends: 576 [2022-03-19 10:42:33,073 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 189 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=258, Invalid=1382, Unknown=0, NotChecked=0, Total=1640 [2022-03-19 10:42:33,073 INFO L912 BasicCegarLoop]: 51 mSDtfsCounter, 76 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 1115 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 1184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 10:42:33,074 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 647 Invalid, 1184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1115 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 10:42:33,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2022-03-19 10:42:33,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 561. [2022-03-19 10:42:33,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 324 states have (on average 1.191358024691358) internal successors, (386), 325 states have internal predecessors, (386), 195 states have call successors, (195), 42 states have call predecessors, (195), 41 states have return successors, (193), 193 states have call predecessors, (193), 193 states have call successors, (193) [2022-03-19 10:42:33,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 774 transitions. [2022-03-19 10:42:33,185 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 774 transitions. Word has length 113 [2022-03-19 10:42:33,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:42:33,185 INFO L478 AbstractCegarLoop]: Abstraction has 561 states and 774 transitions. [2022-03-19 10:42:33,185 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.05) internal successors, (41), 19 states have internal predecessors, (41), 8 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 7 states have call successors, (17) [2022-03-19 10:42:33,185 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 774 transitions. [2022-03-19 10:42:33,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-19 10:42:33,186 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:42:33,186 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:42:33,217 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-03-19 10:42:33,418 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-03-19 10:42:33,418 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:42:33,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:42:33,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1938711081, now seen corresponding path program 11 times [2022-03-19 10:42:33,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:42:33,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [703370688] [2022-03-19 10:42:33,419 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:42:33,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1938711081, now seen corresponding path program 12 times [2022-03-19 10:42:33,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:42:33,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228426571] [2022-03-19 10:42:33,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:42:33,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:42:33,430 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:42:33,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [525158328] [2022-03-19 10:42:33,430 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 10:42:33,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:42:33,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:42:33,431 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:42:33,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-19 10:42:33,494 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-19 10:42:33,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:42:33,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 104 conjunts are in the unsatisfiable core [2022-03-19 10:42:33,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:42:34,663 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 68 proven. 99 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2022-03-19 10:42:34,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:42:47,349 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 66 proven. 77 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2022-03-19 10:42:47,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:42:47,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228426571] [2022-03-19 10:42:47,349 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:42:47,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525158328] [2022-03-19 10:42:47,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525158328] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:42:47,349 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:42:47,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 38 [2022-03-19 10:42:47,349 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:42:47,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [703370688] [2022-03-19 10:42:47,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [703370688] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:42:47,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:42:47,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-19 10:42:47,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252352671] [2022-03-19 10:42:47,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:42:47,350 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-19 10:42:47,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:42:47,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-19 10:42:47,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1154, Unknown=0, NotChecked=0, Total=1406 [2022-03-19 10:42:47,351 INFO L87 Difference]: Start difference. First operand 561 states and 774 transitions. Second operand has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-19 10:42:48,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:42:48,462 INFO L93 Difference]: Finished difference Result 658 states and 887 transitions. [2022-03-19 10:42:48,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-19 10:42:48,462 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 116 [2022-03-19 10:42:48,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:42:48,465 INFO L225 Difference]: With dead ends: 658 [2022-03-19 10:42:48,465 INFO L226 Difference]: Without dead ends: 583 [2022-03-19 10:42:48,466 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 192 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=322, Invalid=1570, Unknown=0, NotChecked=0, Total=1892 [2022-03-19 10:42:48,466 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 105 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 1066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 10:42:48,466 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 329 Invalid, 1066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 921 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 10:42:48,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2022-03-19 10:42:48,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 529. [2022-03-19 10:42:48,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 308 states have (on average 1.1818181818181819) internal successors, (364), 309 states have internal predecessors, (364), 179 states have call successors, (179), 42 states have call predecessors, (179), 41 states have return successors, (177), 177 states have call predecessors, (177), 177 states have call successors, (177) [2022-03-19 10:42:48,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 720 transitions. [2022-03-19 10:42:48,581 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 720 transitions. Word has length 116 [2022-03-19 10:42:48,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:42:48,581 INFO L478 AbstractCegarLoop]: Abstraction has 529 states and 720 transitions. [2022-03-19 10:42:48,581 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-19 10:42:48,582 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 720 transitions. [2022-03-19 10:42:48,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-19 10:42:48,583 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:42:48,583 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:42:48,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-19 10:42:48,799 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-19 10:42:48,799 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:42:48,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:42:48,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1687072417, now seen corresponding path program 13 times [2022-03-19 10:42:48,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:42:48,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1322046199] [2022-03-19 10:42:48,800 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:42:48,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1687072417, now seen corresponding path program 14 times [2022-03-19 10:42:48,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:42:48,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736084528] [2022-03-19 10:42:48,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:42:48,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:42:48,806 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:42:48,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1735099520] [2022-03-19 10:42:48,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:42:48,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:42:48,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:42:48,807 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:42:48,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-19 10:42:48,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:42:48,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:42:48,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 91 conjunts are in the unsatisfiable core [2022-03-19 10:42:48,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:42:49,850 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:42:49,855 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:43:02,544 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 95 proven. 63 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-03-19 10:43:02,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:43:05,713 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:43:11,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:43:11,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736084528] [2022-03-19 10:43:11,488 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:43:11,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735099520] [2022-03-19 10:43:11,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735099520] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 10:43:11,489 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 10:43:11,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-03-19 10:43:11,489 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:43:11,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1322046199] [2022-03-19 10:43:11,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1322046199] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:43:11,489 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:43:11,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-19 10:43:11,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891997466] [2022-03-19 10:43:11,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:43:11,489 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-19 10:43:11,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:43:11,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-19 10:43:11,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=703, Unknown=1, NotChecked=0, Total=812 [2022-03-19 10:43:11,490 INFO L87 Difference]: Start difference. First operand 529 states and 720 transitions. Second operand has 20 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-19 10:43:24,139 WARN L232 SmtUtils]: Spent 5.62s on a formula simplification. DAG size of input: 96 DAG size of output: 86 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 10:43:27,439 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 10:43:29,442 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 10:43:31,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:43:31,497 INFO L93 Difference]: Finished difference Result 621 states and 847 transitions. [2022-03-19 10:43:31,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-19 10:43:31,498 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 116 [2022-03-19 10:43:31,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:43:31,500 INFO L225 Difference]: With dead ends: 621 [2022-03-19 10:43:31,500 INFO L226 Difference]: Without dead ends: 618 [2022-03-19 10:43:31,501 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 120 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 22.2s TimeCoverageRelationStatistics Valid=187, Invalid=1217, Unknown=2, NotChecked=0, Total=1406 [2022-03-19 10:43:31,502 INFO L912 BasicCegarLoop]: 60 mSDtfsCounter, 77 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 1122 mSolverCounterSat, 87 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 788 SdHoareTripleChecker+Invalid, 1211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1122 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2022-03-19 10:43:31,502 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 788 Invalid, 1211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1122 Invalid, 2 Unknown, 0 Unchecked, 7.8s Time] [2022-03-19 10:43:31,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2022-03-19 10:43:31,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 594. [2022-03-19 10:43:31,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 342 states have (on average 1.1900584795321638) internal successors, (407), 343 states have internal predecessors, (407), 207 states have call successors, (207), 45 states have call predecessors, (207), 44 states have return successors, (205), 205 states have call predecessors, (205), 205 states have call successors, (205) [2022-03-19 10:43:31,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 819 transitions. [2022-03-19 10:43:31,637 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 819 transitions. Word has length 116 [2022-03-19 10:43:31,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:43:31,639 INFO L478 AbstractCegarLoop]: Abstraction has 594 states and 819 transitions. [2022-03-19 10:43:31,639 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-19 10:43:31,639 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 819 transitions. [2022-03-19 10:43:31,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-03-19 10:43:31,641 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:43:31,641 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:43:31,660 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-03-19 10:43:31,849 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:43:31,850 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:43:31,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:43:31,850 INFO L85 PathProgramCache]: Analyzing trace with hash 764235165, now seen corresponding path program 15 times [2022-03-19 10:43:31,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:43:31,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [962587691] [2022-03-19 10:43:31,853 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:43:31,853 INFO L85 PathProgramCache]: Analyzing trace with hash 764235165, now seen corresponding path program 16 times [2022-03-19 10:43:31,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:43:31,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332858342] [2022-03-19 10:43:31,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:43:31,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:43:31,864 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:43:31,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [400491654] [2022-03-19 10:43:31,864 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:43:31,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:43:31,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:43:31,866 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:43:31,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-19 10:43:31,983 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:43:31,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:43:31,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 126 conjunts are in the unsatisfiable core [2022-03-19 10:43:31,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:43:32,453 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:43:32,542 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:43:32,586 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:43:32,930 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:43:32,933 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:44:25,412 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 87 proven. 108 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-03-19 10:44:25,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:44:30,418 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 129 proven. 17 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-19 10:44:30,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:44:30,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332858342] [2022-03-19 10:44:30,418 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:44:30,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400491654] [2022-03-19 10:44:30,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400491654] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:44:30,418 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:44:30,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 15] total 37 [2022-03-19 10:44:30,419 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:44:30,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [962587691] [2022-03-19 10:44:30,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [962587691] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:44:30,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:44:30,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-19 10:44:30,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581388879] [2022-03-19 10:44:30,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:44:30,419 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-19 10:44:30,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:44:30,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-19 10:44:30,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1121, Unknown=0, NotChecked=0, Total=1332 [2022-03-19 10:44:30,420 INFO L87 Difference]: Start difference. First operand 594 states and 819 transitions. Second operand has 27 states, 25 states have (on average 1.96) internal successors, (49), 23 states have internal predecessors, (49), 9 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 8 states have call successors, (17) [2022-03-19 10:44:33,064 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 10:44:35,075 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 10:44:36,907 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 10:44:39,999 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 10:44:43,304 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 10:44:45,035 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 10:44:46,158 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 10:44:47,871 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 10:44:50,107 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 10:44:53,291 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 10:45:05,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:45:05,156 INFO L93 Difference]: Finished difference Result 699 states and 957 transitions. [2022-03-19 10:45:05,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-19 10:45:05,157 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 1.96) internal successors, (49), 23 states have internal predecessors, (49), 9 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 8 states have call successors, (17) Word has length 121 [2022-03-19 10:45:05,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:45:05,159 INFO L225 Difference]: With dead ends: 699 [2022-03-19 10:45:05,159 INFO L226 Difference]: Without dead ends: 696 [2022-03-19 10:45:05,160 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 202 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 25.0s TimeCoverageRelationStatistics Valid=317, Invalid=1845, Unknown=0, NotChecked=0, Total=2162 [2022-03-19 10:45:05,160 INFO L912 BasicCegarLoop]: 59 mSDtfsCounter, 108 mSDsluCounter, 788 mSDsCounter, 0 mSdLazyCounter, 1893 mSolverCounterSat, 86 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 847 SdHoareTripleChecker+Invalid, 1985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1893 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.4s IncrementalHoareTripleChecker+Time [2022-03-19 10:45:05,161 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 847 Invalid, 1985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1893 Invalid, 6 Unknown, 0 Unchecked, 29.4s Time] [2022-03-19 10:45:05,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2022-03-19 10:45:05,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 667. [2022-03-19 10:45:05,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 382 states have (on average 1.193717277486911) internal successors, (456), 383 states have internal predecessors, (456), 235 states have call successors, (235), 50 states have call predecessors, (235), 49 states have return successors, (233), 233 states have call predecessors, (233), 233 states have call successors, (233) [2022-03-19 10:45:05,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 924 transitions. [2022-03-19 10:45:05,323 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 924 transitions. Word has length 121 [2022-03-19 10:45:05,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:45:05,323 INFO L478 AbstractCegarLoop]: Abstraction has 667 states and 924 transitions. [2022-03-19 10:45:05,323 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 1.96) internal successors, (49), 23 states have internal predecessors, (49), 9 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 8 states have call successors, (17) [2022-03-19 10:45:05,323 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 924 transitions. [2022-03-19 10:45:05,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-03-19 10:45:05,324 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:45:05,325 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:45:05,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-19 10:45:05,538 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:45:05,539 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:45:05,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:45:05,539 INFO L85 PathProgramCache]: Analyzing trace with hash 65157230, now seen corresponding path program 1 times [2022-03-19 10:45:05,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:45:05,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [715114642] [2022-03-19 10:45:05,539 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:45:05,540 INFO L85 PathProgramCache]: Analyzing trace with hash 65157230, now seen corresponding path program 2 times [2022-03-19 10:45:05,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:45:05,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295131803] [2022-03-19 10:45:05,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:45:05,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:45:05,545 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:45:05,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1955890500] [2022-03-19 10:45:05,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:45:05,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:45:05,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:45:05,546 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:45:05,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-19 10:45:05,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:45:05,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:45:05,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-19 10:45:05,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:45:05,930 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 89 proven. 45 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2022-03-19 10:45:05,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:45:06,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:45:06,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295131803] [2022-03-19 10:45:06,652 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:45:06,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955890500] [2022-03-19 10:45:06,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955890500] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 10:45:06,652 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 10:45:06,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-03-19 10:45:06,652 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:45:06,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [715114642] [2022-03-19 10:45:06,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [715114642] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:45:06,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:45:06,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 10:45:06,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072413090] [2022-03-19 10:45:06,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:45:06,653 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 10:45:06,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:45:06,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 10:45:06,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-03-19 10:45:06,653 INFO L87 Difference]: Start difference. First operand 667 states and 924 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 6 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2022-03-19 10:45:07,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:45:07,416 INFO L93 Difference]: Finished difference Result 747 states and 1021 transitions. [2022-03-19 10:45:07,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-19 10:45:07,417 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 6 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) Word has length 124 [2022-03-19 10:45:07,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:45:07,419 INFO L225 Difference]: With dead ends: 747 [2022-03-19 10:45:07,419 INFO L226 Difference]: Without dead ends: 647 [2022-03-19 10:45:07,420 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 174 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=265, Invalid=1217, Unknown=0, NotChecked=0, Total=1482 [2022-03-19 10:45:07,420 INFO L912 BasicCegarLoop]: 85 mSDtfsCounter, 89 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 654 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 10:45:07,420 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 654 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 10:45:07,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2022-03-19 10:45:07,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 631. [2022-03-19 10:45:07,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631 states, 363 states have (on average 1.18732782369146) internal successors, (431), 364 states have internal predecessors, (431), 219 states have call successors, (219), 49 states have call predecessors, (219), 48 states have return successors, (217), 217 states have call predecessors, (217), 217 states have call successors, (217) [2022-03-19 10:45:07,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 867 transitions. [2022-03-19 10:45:07,575 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 867 transitions. Word has length 124 [2022-03-19 10:45:07,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:45:07,575 INFO L478 AbstractCegarLoop]: Abstraction has 631 states and 867 transitions. [2022-03-19 10:45:07,575 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 6 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2022-03-19 10:45:07,575 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 867 transitions. [2022-03-19 10:45:07,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-03-19 10:45:07,577 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:45:07,577 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:45:07,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-19 10:45:07,793 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-19 10:45:07,794 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:45:07,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:45:07,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1339589678, now seen corresponding path program 3 times [2022-03-19 10:45:07,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:45:07,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2070127303] [2022-03-19 10:45:07,794 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:45:07,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1339589678, now seen corresponding path program 4 times [2022-03-19 10:45:07,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:45:07,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526999181] [2022-03-19 10:45:07,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:45:07,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:45:07,802 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:45:07,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1351487927] [2022-03-19 10:45:07,802 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:45:07,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:45:07,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:45:07,803 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:45:07,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-19 10:45:07,853 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:45:07,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:45:07,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-19 10:45:07,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:45:08,148 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 99 proven. 35 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2022-03-19 10:45:08,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:45:08,575 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 55 proven. 33 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2022-03-19 10:45:08,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:45:08,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526999181] [2022-03-19 10:45:08,575 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:45:08,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351487927] [2022-03-19 10:45:08,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351487927] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:45:08,576 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:45:08,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2022-03-19 10:45:08,576 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:45:08,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2070127303] [2022-03-19 10:45:08,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2070127303] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:45:08,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:45:08,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 10:45:08,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227455160] [2022-03-19 10:45:08,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:45:08,578 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 10:45:08,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:45:08,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 10:45:08,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2022-03-19 10:45:08,579 INFO L87 Difference]: Start difference. First operand 631 states and 867 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 6 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2022-03-19 10:45:09,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:45:09,688 INFO L93 Difference]: Finished difference Result 800 states and 1112 transitions. [2022-03-19 10:45:09,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-19 10:45:09,689 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 6 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) Word has length 124 [2022-03-19 10:45:09,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:45:09,704 INFO L225 Difference]: With dead ends: 800 [2022-03-19 10:45:09,704 INFO L226 Difference]: Without dead ends: 736 [2022-03-19 10:45:09,705 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=418, Invalid=1744, Unknown=0, NotChecked=0, Total=2162 [2022-03-19 10:45:09,705 INFO L912 BasicCegarLoop]: 122 mSDtfsCounter, 85 mSDsluCounter, 832 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 954 SdHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 10:45:09,708 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 954 Invalid, 848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 10:45:09,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2022-03-19 10:45:09,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 698. [2022-03-19 10:45:09,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 398 states have (on average 1.193467336683417) internal successors, (475), 399 states have internal predecessors, (475), 251 states have call successors, (251), 49 states have call predecessors, (251), 48 states have return successors, (249), 249 states have call predecessors, (249), 249 states have call successors, (249) [2022-03-19 10:45:09,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 975 transitions. [2022-03-19 10:45:09,882 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 975 transitions. Word has length 124 [2022-03-19 10:45:09,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:45:09,883 INFO L478 AbstractCegarLoop]: Abstraction has 698 states and 975 transitions. [2022-03-19 10:45:09,883 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 6 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2022-03-19 10:45:09,883 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 975 transitions. [2022-03-19 10:45:09,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-03-19 10:45:09,884 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:45:09,884 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:45:09,901 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-03-19 10:45:10,098 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-19 10:45:10,099 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:45:10,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:45:10,099 INFO L85 PathProgramCache]: Analyzing trace with hash -590650772, now seen corresponding path program 5 times [2022-03-19 10:45:10,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:45:10,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [620537422] [2022-03-19 10:45:10,100 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:45:10,100 INFO L85 PathProgramCache]: Analyzing trace with hash -590650772, now seen corresponding path program 6 times [2022-03-19 10:45:10,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:45:10,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817608849] [2022-03-19 10:45:10,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:45:10,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:45:10,107 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:45:10,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1434118258] [2022-03-19 10:45:10,107 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 10:45:10,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:45:10,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:45:10,108 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:45:10,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-19 10:45:10,159 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 10:45:10,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:45:10,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-19 10:45:10,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:45:10,455 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 95 proven. 62 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2022-03-19 10:45:10,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:45:11,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:45:11,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817608849] [2022-03-19 10:45:11,193 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:45:11,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434118258] [2022-03-19 10:45:11,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434118258] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 10:45:11,194 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 10:45:11,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-03-19 10:45:11,194 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:45:11,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [620537422] [2022-03-19 10:45:11,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [620537422] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:45:11,194 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:45:11,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 10:45:11,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860154152] [2022-03-19 10:45:11,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:45:11,195 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 10:45:11,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:45:11,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 10:45:11,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-03-19 10:45:11,195 INFO L87 Difference]: Start difference. First operand 698 states and 975 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 4 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2022-03-19 10:45:12,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:45:12,033 INFO L93 Difference]: Finished difference Result 738 states and 1016 transitions. [2022-03-19 10:45:12,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 10:45:12,033 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 4 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) Word has length 129 [2022-03-19 10:45:12,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:45:12,037 INFO L225 Difference]: With dead ends: 738 [2022-03-19 10:45:12,037 INFO L226 Difference]: Without dead ends: 736 [2022-03-19 10:45:12,037 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 136 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2022-03-19 10:45:12,037 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 57 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 10:45:12,037 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 267 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 10:45:12,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2022-03-19 10:45:12,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 711. [2022-03-19 10:45:12,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 407 states have (on average 1.1891891891891893) internal successors, (484), 409 states have internal predecessors, (484), 253 states have call successors, (253), 51 states have call predecessors, (253), 50 states have return successors, (251), 250 states have call predecessors, (251), 251 states have call successors, (251) [2022-03-19 10:45:12,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 988 transitions. [2022-03-19 10:45:12,252 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 988 transitions. Word has length 129 [2022-03-19 10:45:12,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:45:12,253 INFO L478 AbstractCegarLoop]: Abstraction has 711 states and 988 transitions. [2022-03-19 10:45:12,253 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 4 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2022-03-19 10:45:12,253 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 988 transitions. [2022-03-19 10:45:12,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-03-19 10:45:12,254 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:45:12,254 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:45:12,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-19 10:45:12,480 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-19 10:45:12,480 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:45:12,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:45:12,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1469141304, now seen corresponding path program 17 times [2022-03-19 10:45:12,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:45:12,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [593419214] [2022-03-19 10:45:12,481 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:45:12,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1469141304, now seen corresponding path program 18 times [2022-03-19 10:45:12,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:45:12,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677485343] [2022-03-19 10:45:12,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:45:12,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:45:12,486 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:45:12,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1975974153] [2022-03-19 10:45:12,486 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 10:45:12,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:45:12,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:45:12,488 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:45:12,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-19 10:45:12,559 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-19 10:45:12,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:45:12,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 10:45:12,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:45:12,724 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 243 proven. 18 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2022-03-19 10:45:12,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:45:12,883 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 59 proven. 18 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2022-03-19 10:45:12,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:45:12,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677485343] [2022-03-19 10:45:12,883 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:45:12,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975974153] [2022-03-19 10:45:12,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975974153] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:45:12,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:45:12,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2022-03-19 10:45:12,884 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:45:12,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [593419214] [2022-03-19 10:45:12,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [593419214] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:45:12,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:45:12,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 10:45:12,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455172285] [2022-03-19 10:45:12,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:45:12,888 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 10:45:12,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:45:12,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 10:45:12,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-19 10:45:12,888 INFO L87 Difference]: Start difference. First operand 711 states and 988 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 5 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2022-03-19 10:45:13,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:45:13,289 INFO L93 Difference]: Finished difference Result 1270 states and 1831 transitions. [2022-03-19 10:45:13,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 10:45:13,289 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 5 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) Word has length 133 [2022-03-19 10:45:13,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:45:13,293 INFO L225 Difference]: With dead ends: 1270 [2022-03-19 10:45:13,293 INFO L226 Difference]: Without dead ends: 905 [2022-03-19 10:45:13,294 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 259 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-03-19 10:45:13,294 INFO L912 BasicCegarLoop]: 66 mSDtfsCounter, 9 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:45:13,294 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 291 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:45:13,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2022-03-19 10:45:13,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 854. [2022-03-19 10:45:13,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 469 states have (on average 1.2132196162046909) internal successors, (569), 482 states have internal predecessors, (569), 337 states have call successors, (337), 48 states have call predecessors, (337), 47 states have return successors, (335), 323 states have call predecessors, (335), 335 states have call successors, (335) [2022-03-19 10:45:13,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 1241 transitions. [2022-03-19 10:45:13,551 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 1241 transitions. Word has length 133 [2022-03-19 10:45:13,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:45:13,552 INFO L478 AbstractCegarLoop]: Abstraction has 854 states and 1241 transitions. [2022-03-19 10:45:13,552 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 5 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2022-03-19 10:45:13,552 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 1241 transitions. [2022-03-19 10:45:13,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-03-19 10:45:13,553 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:45:13,553 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:45:13,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-19 10:45:13,763 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-19 10:45:13,763 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:45:13,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:45:13,764 INFO L85 PathProgramCache]: Analyzing trace with hash -914829018, now seen corresponding path program 19 times [2022-03-19 10:45:13,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:45:13,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [395786899] [2022-03-19 10:45:13,764 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:45:13,764 INFO L85 PathProgramCache]: Analyzing trace with hash -914829018, now seen corresponding path program 20 times [2022-03-19 10:45:13,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:45:13,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953112662] [2022-03-19 10:45:13,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:45:13,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:45:13,770 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:45:13,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1643309132] [2022-03-19 10:45:13,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:45:13,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:45:13,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:45:13,771 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:45:13,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-19 10:45:13,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:45:13,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:45:13,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 81 conjunts are in the unsatisfiable core [2022-03-19 10:45:13,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:45:14,911 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 133 proven. 88 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2022-03-19 10:45:14,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:45:21,455 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 134 proven. 60 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2022-03-19 10:45:21,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:45:21,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953112662] [2022-03-19 10:45:21,456 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:45:21,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643309132] [2022-03-19 10:45:21,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643309132] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:45:21,456 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:45:21,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 31 [2022-03-19 10:45:21,456 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:45:21,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [395786899] [2022-03-19 10:45:21,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [395786899] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:45:21,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:45:21,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-19 10:45:21,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114296021] [2022-03-19 10:45:21,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:45:21,457 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-19 10:45:21,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:45:21,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-19 10:45:21,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=744, Unknown=0, NotChecked=0, Total=930 [2022-03-19 10:45:21,457 INFO L87 Difference]: Start difference. First operand 854 states and 1241 transitions. Second operand has 17 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2022-03-19 10:45:22,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:45:22,473 INFO L93 Difference]: Finished difference Result 982 states and 1424 transitions. [2022-03-19 10:45:22,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 10:45:22,473 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) Word has length 133 [2022-03-19 10:45:22,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:45:22,480 INFO L225 Difference]: With dead ends: 982 [2022-03-19 10:45:22,480 INFO L226 Difference]: Without dead ends: 979 [2022-03-19 10:45:22,481 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 232 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=225, Invalid=965, Unknown=0, NotChecked=0, Total=1190 [2022-03-19 10:45:22,481 INFO L912 BasicCegarLoop]: 58 mSDtfsCounter, 58 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 813 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 10:45:22,481 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 561 Invalid, 896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 813 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 10:45:22,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 979 states. [2022-03-19 10:45:22,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 979 to 893. [2022-03-19 10:45:22,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 489 states have (on average 1.2147239263803682) internal successors, (594), 502 states have internal predecessors, (594), 353 states have call successors, (353), 51 states have call predecessors, (353), 50 states have return successors, (351), 339 states have call predecessors, (351), 351 states have call successors, (351) [2022-03-19 10:45:22,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 1298 transitions. [2022-03-19 10:45:22,779 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 1298 transitions. Word has length 133 [2022-03-19 10:45:22,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:45:22,779 INFO L478 AbstractCegarLoop]: Abstraction has 893 states and 1298 transitions. [2022-03-19 10:45:22,779 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2022-03-19 10:45:22,779 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 1298 transitions. [2022-03-19 10:45:22,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-19 10:45:22,780 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:45:22,780 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:45:22,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-19 10:45:22,997 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-19 10:45:22,997 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:45:22,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:45:22,997 INFO L85 PathProgramCache]: Analyzing trace with hash -112069451, now seen corresponding path program 21 times [2022-03-19 10:45:22,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:45:22,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [17018568] [2022-03-19 10:45:22,998 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:45:22,998 INFO L85 PathProgramCache]: Analyzing trace with hash -112069451, now seen corresponding path program 22 times [2022-03-19 10:45:22,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:45:22,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086063048] [2022-03-19 10:45:22,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:45:22,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:45:23,003 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:45:23,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [570204040] [2022-03-19 10:45:23,003 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:45:23,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:45:23,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:45:23,006 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:45:23,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-19 10:45:23,067 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:45:23,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:45:23,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-19 10:45:23,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:45:23,372 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 42 proven. 48 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-03-19 10:45:23,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:45:45,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:45:45,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086063048] [2022-03-19 10:45:45,964 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:45:45,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570204040] [2022-03-19 10:45:45,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570204040] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 10:45:45,965 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 10:45:45,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-03-19 10:45:45,965 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:45:45,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [17018568] [2022-03-19 10:45:45,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [17018568] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:45:45,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:45:45,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 10:45:45,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903419111] [2022-03-19 10:45:45,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:45:45,965 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 10:45:45,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:45:45,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 10:45:45,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=388, Unknown=3, NotChecked=0, Total=462 [2022-03-19 10:45:45,966 INFO L87 Difference]: Start difference. First operand 893 states and 1298 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2022-03-19 10:45:46,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:45:46,888 INFO L93 Difference]: Finished difference Result 1361 states and 2041 transitions. [2022-03-19 10:45:46,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 10:45:46,888 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) Word has length 135 [2022-03-19 10:45:46,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:45:46,893 INFO L225 Difference]: With dead ends: 1361 [2022-03-19 10:45:46,893 INFO L226 Difference]: Without dead ends: 1207 [2022-03-19 10:45:46,894 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=226, Invalid=827, Unknown=3, NotChecked=0, Total=1056 [2022-03-19 10:45:46,894 INFO L912 BasicCegarLoop]: 85 mSDtfsCounter, 52 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 10:45:46,895 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 465 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 10:45:46,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1207 states. [2022-03-19 10:45:47,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1207 to 977. [2022-03-19 10:45:47,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 977 states, 537 states have (on average 1.2122905027932962) internal successors, (651), 550 states have internal predecessors, (651), 389 states have call successors, (389), 51 states have call predecessors, (389), 50 states have return successors, (387), 375 states have call predecessors, (387), 387 states have call successors, (387) [2022-03-19 10:45:47,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 977 states to 977 states and 1427 transitions. [2022-03-19 10:45:47,259 INFO L78 Accepts]: Start accepts. Automaton has 977 states and 1427 transitions. Word has length 135 [2022-03-19 10:45:47,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:45:47,259 INFO L478 AbstractCegarLoop]: Abstraction has 977 states and 1427 transitions. [2022-03-19 10:45:47,259 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2022-03-19 10:45:47,259 INFO L276 IsEmpty]: Start isEmpty. Operand 977 states and 1427 transitions. [2022-03-19 10:45:47,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-03-19 10:45:47,261 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:45:47,261 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:45:47,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-19 10:45:47,477 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:45:47,478 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:45:47,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:45:47,478 INFO L85 PathProgramCache]: Analyzing trace with hash -2035738456, now seen corresponding path program 23 times [2022-03-19 10:45:47,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:45:47,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1707599441] [2022-03-19 10:45:47,478 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:45:47,479 INFO L85 PathProgramCache]: Analyzing trace with hash -2035738456, now seen corresponding path program 24 times [2022-03-19 10:45:47,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:45:47,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270378945] [2022-03-19 10:45:47,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:45:47,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:45:47,484 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:45:47,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1864785172] [2022-03-19 10:45:47,484 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 10:45:47,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:45:47,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:45:47,486 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:45:47,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-19 10:45:47,553 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-03-19 10:45:47,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:45:47,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 104 conjunts are in the unsatisfiable core [2022-03-19 10:45:47,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:45:49,421 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:45:49,423 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:45:49,978 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 115 proven. 126 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2022-03-19 10:45:49,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:45:54,448 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:45:56,257 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:46:14,501 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 101 proven. 104 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2022-03-19 10:46:14,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:46:14,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270378945] [2022-03-19 10:46:14,501 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:46:14,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864785172] [2022-03-19 10:46:14,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864785172] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:46:14,502 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:46:14,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 41 [2022-03-19 10:46:14,502 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:46:14,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1707599441] [2022-03-19 10:46:14,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1707599441] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:46:14,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:46:14,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-19 10:46:14,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314399362] [2022-03-19 10:46:14,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:46:14,502 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-19 10:46:14,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:46:14,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-19 10:46:14,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=1397, Unknown=0, NotChecked=0, Total=1640 [2022-03-19 10:46:14,503 INFO L87 Difference]: Start difference. First operand 977 states and 1427 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 20 states have internal predecessors, (46), 8 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2022-03-19 10:46:18,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:46:18,326 INFO L93 Difference]: Finished difference Result 1127 states and 1617 transitions. [2022-03-19 10:46:18,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-19 10:46:18,327 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 20 states have internal predecessors, (46), 8 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) Word has length 138 [2022-03-19 10:46:18,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:46:18,331 INFO L225 Difference]: With dead ends: 1127 [2022-03-19 10:46:18,331 INFO L226 Difference]: Without dead ends: 1009 [2022-03-19 10:46:18,332 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 232 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 23.1s TimeCoverageRelationStatistics Valid=455, Invalid=2515, Unknown=0, NotChecked=0, Total=2970 [2022-03-19 10:46:18,332 INFO L912 BasicCegarLoop]: 52 mSDtfsCounter, 104 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 1318 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 1482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 1318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-19 10:46:18,333 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 494 Invalid, 1482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 1318 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-19 10:46:18,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2022-03-19 10:46:18,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 985. [2022-03-19 10:46:18,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 543 states have (on average 1.2081031307550645) internal successors, (656), 556 states have internal predecessors, (656), 389 states have call successors, (389), 53 states have call predecessors, (389), 52 states have return successors, (387), 375 states have call predecessors, (387), 387 states have call successors, (387) [2022-03-19 10:46:18,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 1432 transitions. [2022-03-19 10:46:18,645 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 1432 transitions. Word has length 138 [2022-03-19 10:46:18,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:46:18,645 INFO L478 AbstractCegarLoop]: Abstraction has 985 states and 1432 transitions. [2022-03-19 10:46:18,645 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 20 states have internal predecessors, (46), 8 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2022-03-19 10:46:18,645 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 1432 transitions. [2022-03-19 10:46:18,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-03-19 10:46:18,646 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:46:18,646 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:46:18,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-19 10:46:18,863 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-03-19 10:46:18,863 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:46:18,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:46:18,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1937049344, now seen corresponding path program 25 times [2022-03-19 10:46:18,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:46:18,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1863513320] [2022-03-19 10:46:18,864 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:46:18,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1937049344, now seen corresponding path program 26 times [2022-03-19 10:46:18,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:46:18,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205433738] [2022-03-19 10:46:18,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:46:18,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:46:18,869 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:46:18,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [443824037] [2022-03-19 10:46:18,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:46:18,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:46:18,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:46:18,870 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:46:18,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-19 10:46:18,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:46:18,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:46:18,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 93 conjunts are in the unsatisfiable core [2022-03-19 10:46:18,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:46:20,000 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:46:20,004 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:46:22,267 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~p~0 c_main_~x~0)) (.cse1 (* c_main_~r~0 c_main_~y~0))) (and (= (+ .cse0 .cse1 c_main_~y~0) c_main_~x~0) (let ((.cse8 (+ c_main_~b~0 (* .cse0 4) (* .cse1 4))) (.cse9 (* 2 (* c_main_~r~0 c_main_~y~0 0))) (.cse10 (* 2 (* c_main_~p~0 c_main_~x~0 0))) (.cse11 (* c_main_~q~0 c_main_~x~0)) (.cse12 (* c_main_~s~0 c_main_~y~0)) (.cse14 (= (mod (* c_main_~q~0 3) 4) 0)) (.cse2 (= c_main_~p~0 0)) (.cse15 (div (- c_main_~q~0) 4))) (or (and .cse2 (let ((.cse3 (= 0 (mod (+ (* c_main_~s~0 3) 1) 4))) (.cse5 (= c_main_~r~0 0)) (.cse4 (div (+ (* (- 1) c_main_~s~0) 1) 4))) (or (and .cse3 (= (mod .cse4 c_main_~r~0) 0) (not .cse5) (exists ((aux_div_aux_mod_main_~k~0_17_28 Int)) (let ((.cse6 (* 2 aux_div_aux_mod_main_~k~0_17_28))) (and (<= 0 .cse6) (< .cse6 2) (= (let ((.cse7 (div (div (+ (* (- 1) c_main_~s~0) 1) 4) c_main_~r~0))) (+ (* (* .cse7 c_main_~r~0 c_main_~y~0) 2) (* 2 (* .cse7 c_main_~p~0 c_main_~x~0)) (* c_main_~r~0 c_main_~y~0 0) (* c_main_~p~0 c_main_~x~0 0))) (+ (* aux_div_aux_mod_main_~k~0_17_28 c_main_~r~0 c_main_~y~0) (* 2 (* c_main_~r~0 c_main_~y~0)) (* c_main_~p~0 aux_div_aux_mod_main_~k~0_17_28 c_main_~x~0) (* 2 (* c_main_~p~0 c_main_~x~0))))))) (= .cse8 (let ((.cse13 (div .cse4 c_main_~r~0))) (+ .cse9 .cse10 .cse11 .cse12 (* (* .cse13 c_main_~p~0 c_main_~x~0) 4) (* (* .cse13 c_main_~r~0 c_main_~y~0) 4))))) (and .cse3 .cse5 (= .cse4 0) (exists ((aux_div_aux_div_main_~k~0_17_84 Int)) (= (+ c_main_~b~0 (* (* c_main_~p~0 c_main_~x~0) 4) (* (* c_main_~r~0 c_main_~y~0) 4)) (+ (* 2 (* c_main_~r~0 c_main_~y~0 0)) (* 2 (* c_main_~p~0 c_main_~x~0 0)) (* c_main_~q~0 c_main_~x~0) (* (* aux_div_aux_div_main_~k~0_17_84 c_main_~p~0 c_main_~x~0) 4) (* 4 (* aux_div_aux_div_main_~k~0_17_84 c_main_~r~0 c_main_~y~0)) (* c_main_~s~0 c_main_~y~0))))))) .cse14 (= .cse15 0)) (let ((.cse18 (div (div (* (- 1) c_main_~q~0) 4) c_main_~p~0))) (and (exists ((aux_div_aux_mod_main_~k~0_17_28 Int)) (let ((.cse17 (* 2 aux_div_aux_mod_main_~k~0_17_28))) (and (= (let ((.cse16 (div (div (* (- 1) c_main_~q~0) 4) c_main_~p~0))) (+ (* (* .cse16 c_main_~p~0 c_main_~x~0) 2) (* c_main_~r~0 c_main_~y~0 0) (* c_main_~p~0 c_main_~x~0 0) (* 2 (* .cse16 c_main_~r~0 c_main_~y~0)))) (+ (* aux_div_aux_mod_main_~k~0_17_28 c_main_~r~0 c_main_~y~0) (* 2 (* c_main_~r~0 c_main_~y~0)) (* c_main_~p~0 aux_div_aux_mod_main_~k~0_17_28 c_main_~x~0) (* 2 (* c_main_~p~0 c_main_~x~0)))) (<= 0 .cse17) (< .cse17 2)))) (= (+ c_main_~s~0 (* 4 (* .cse18 c_main_~r~0))) 1) (= .cse8 (+ .cse9 .cse10 .cse11 (* (* .cse18 c_main_~r~0 c_main_~y~0) 4) .cse12 (* (* .cse18 c_main_~p~0 c_main_~x~0) 4))) .cse14 (not .cse2) (= (mod .cse15 c_main_~p~0) 0))))) (= (+ .cse0 .cse1) c_main_~a~0))) is different from false [2022-03-19 10:46:33,127 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~p~0 c_main_~x~0)) (.cse1 (* c_main_~r~0 c_main_~y~0))) (and (= (+ .cse0 .cse1 c_main_~y~0) c_main_~x~0) (= (+ .cse0 .cse1) c_main_~a~0) (let ((.cse13 (= (mod (* c_main_~q~0 3) 4) 0)) (.cse2 (= c_main_~p~0 0)) (.cse12 (+ (* .cse0 4) (* .cse1 4))) (.cse7 (* 2 (* c_main_~r~0 c_main_~y~0 0))) (.cse8 (* 2 (* c_main_~p~0 c_main_~x~0 0))) (.cse9 (* c_main_~q~0 c_main_~x~0)) (.cse10 (* c_main_~s~0 c_main_~y~0)) (.cse14 (div (- c_main_~q~0) 4))) (or (and .cse2 (let ((.cse3 (= 0 (mod (+ (* c_main_~s~0 3) 1) 4))) (.cse6 (= c_main_~r~0 0)) (.cse4 (div (+ (* (- 1) c_main_~s~0) 1) 4))) (or (and .cse3 (= (mod .cse4 c_main_~r~0) 0) (exists ((aux_div_aux_mod_main_~k~0_17_28 Int)) (let ((.cse5 (* 2 aux_div_aux_mod_main_~k~0_17_28))) (and (<= 0 .cse5) (< .cse5 2)))) (not .cse6) (= (let ((.cse11 (div .cse4 c_main_~r~0))) (+ .cse7 .cse8 .cse9 .cse10 (* (* .cse11 c_main_~p~0 c_main_~x~0) 4) (* (* .cse11 c_main_~r~0 c_main_~y~0) 4))) .cse12)) (and .cse3 .cse6 (= .cse4 0) (exists ((aux_div_aux_div_main_~k~0_17_84 Int)) (= (+ (* 2 (* c_main_~r~0 c_main_~y~0 0)) (* 2 (* c_main_~p~0 c_main_~x~0 0)) (* c_main_~q~0 c_main_~x~0) (* (* aux_div_aux_div_main_~k~0_17_84 c_main_~p~0 c_main_~x~0) 4) (* 4 (* aux_div_aux_div_main_~k~0_17_84 c_main_~r~0 c_main_~y~0)) (* c_main_~s~0 c_main_~y~0)) (+ (* (* c_main_~p~0 c_main_~x~0) 4) (* (* c_main_~r~0 c_main_~y~0) 4))))))) .cse13 (= .cse14 0)) (let ((.cse17 (div (div (* (- 1) c_main_~q~0) 4) c_main_~p~0))) (and (exists ((aux_div_aux_mod_main_~k~0_17_28 Int)) (let ((.cse16 (* 2 aux_div_aux_mod_main_~k~0_17_28))) (and (= (let ((.cse15 (div (div (* (- 1) c_main_~q~0) 4) c_main_~p~0))) (+ (* (* .cse15 c_main_~p~0 c_main_~x~0) 2) (* c_main_~r~0 c_main_~y~0 0) (* c_main_~p~0 c_main_~x~0 0) (* 2 (* .cse15 c_main_~r~0 c_main_~y~0)))) (+ (* aux_div_aux_mod_main_~k~0_17_28 c_main_~r~0 c_main_~y~0) (* 2 (* c_main_~r~0 c_main_~y~0)) (* c_main_~p~0 aux_div_aux_mod_main_~k~0_17_28 c_main_~x~0) (* 2 (* c_main_~p~0 c_main_~x~0)))) (<= 0 .cse16) (< .cse16 2)))) (= (+ c_main_~s~0 (* 4 (* .cse17 c_main_~r~0))) 1) .cse13 (not .cse2) (= .cse12 (+ .cse7 .cse8 .cse9 (* (* .cse17 c_main_~r~0 c_main_~y~0) 4) .cse10 (* (* .cse17 c_main_~p~0 c_main_~x~0) 4))) (= (mod .cse14 c_main_~p~0) 0))))))) is different from false [2022-03-19 10:46:50,415 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 163 proven. 65 refuted. 0 times theorem prover too weak. 360 trivial. 4 not checked. [2022-03-19 10:46:50,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:46:54,156 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:46:58,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:46:58,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205433738] [2022-03-19 10:46:58,117 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:46:58,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443824037] [2022-03-19 10:46:58,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443824037] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 10:46:58,117 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 10:46:58,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2022-03-19 10:46:58,118 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:46:58,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1863513320] [2022-03-19 10:46:58,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1863513320] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:46:58,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:46:58,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-19 10:46:58,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934589473] [2022-03-19 10:46:58,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:46:58,118 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-19 10:46:58,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:46:58,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-19 10:46:58,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=696, Unknown=2, NotChecked=110, Total=930 [2022-03-19 10:46:58,119 INFO L87 Difference]: Start difference. First operand 985 states and 1432 transitions. Second operand has 21 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2022-03-19 10:47:00,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:47:00,399 INFO L93 Difference]: Finished difference Result 1049 states and 1514 transitions. [2022-03-19 10:47:00,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-19 10:47:00,400 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) Word has length 138 [2022-03-19 10:47:00,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:47:00,403 INFO L225 Difference]: With dead ends: 1049 [2022-03-19 10:47:00,404 INFO L226 Difference]: Without dead ends: 1046 [2022-03-19 10:47:00,404 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 162 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=183, Invalid=1083, Unknown=2, NotChecked=138, Total=1406 [2022-03-19 10:47:00,404 INFO L912 BasicCegarLoop]: 56 mSDtfsCounter, 66 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 1021 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 1350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 250 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-19 10:47:00,405 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 724 Invalid, 1350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1021 Invalid, 0 Unknown, 250 Unchecked, 1.6s Time] [2022-03-19 10:47:00,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1046 states. [2022-03-19 10:47:00,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1046 to 1021. [2022-03-19 10:47:00,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 564 states have (on average 1.2074468085106382) internal successors, (681), 577 states have internal predecessors, (681), 401 states have call successors, (401), 56 states have call predecessors, (401), 55 states have return successors, (399), 387 states have call predecessors, (399), 399 states have call successors, (399) [2022-03-19 10:47:00,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 1481 transitions. [2022-03-19 10:47:00,732 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 1481 transitions. Word has length 138 [2022-03-19 10:47:00,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:47:00,732 INFO L478 AbstractCegarLoop]: Abstraction has 1021 states and 1481 transitions. [2022-03-19 10:47:00,732 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2022-03-19 10:47:00,732 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 1481 transitions. [2022-03-19 10:47:00,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-03-19 10:47:00,734 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:47:00,734 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:47:00,763 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-03-19 10:47:00,966 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:47:00,966 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:47:00,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:47:00,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1588704448, now seen corresponding path program 27 times [2022-03-19 10:47:00,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:47:00,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2108057946] [2022-03-19 10:47:00,967 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:47:00,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1588704448, now seen corresponding path program 28 times [2022-03-19 10:47:00,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:47:00,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181458155] [2022-03-19 10:47:00,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:47:00,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:47:00,972 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:47:00,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2087034634] [2022-03-19 10:47:00,972 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:47:00,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:47:00,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:47:00,973 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:47:00,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-19 10:47:01,030 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:47:01,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:47:01,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 103 conjunts are in the unsatisfiable core [2022-03-19 10:47:01,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:47:04,772 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:47:04,867 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 146 proven. 122 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2022-03-19 10:47:04,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:47:06,749 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:47:12,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:47:12,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181458155] [2022-03-19 10:47:12,401 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:47:12,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087034634] [2022-03-19 10:47:12,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087034634] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 10:47:12,401 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 10:47:12,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2022-03-19 10:47:12,401 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:47:12,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2108057946] [2022-03-19 10:47:12,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2108057946] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:47:12,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:47:12,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-19 10:47:12,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614909523] [2022-03-19 10:47:12,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:47:12,402 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-19 10:47:12,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:47:12,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-19 10:47:12,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2022-03-19 10:47:12,402 INFO L87 Difference]: Start difference. First operand 1021 states and 1481 transitions. Second operand has 21 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2022-03-19 10:47:16,040 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 10:47:20,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:47:20,397 INFO L93 Difference]: Finished difference Result 1140 states and 1645 transitions. [2022-03-19 10:47:20,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-19 10:47:20,398 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) Word has length 138 [2022-03-19 10:47:20,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:47:20,402 INFO L225 Difference]: With dead ends: 1140 [2022-03-19 10:47:20,402 INFO L226 Difference]: Without dead ends: 1137 [2022-03-19 10:47:20,403 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 141 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=202, Invalid=1358, Unknown=0, NotChecked=0, Total=1560 [2022-03-19 10:47:20,403 INFO L912 BasicCegarLoop]: 72 mSDtfsCounter, 79 mSDsluCounter, 900 mSDsCounter, 0 mSdLazyCounter, 1362 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 972 SdHoareTripleChecker+Invalid, 1451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-03-19 10:47:20,403 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 972 Invalid, 1451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1362 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-03-19 10:47:20,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2022-03-19 10:47:20,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 1107. [2022-03-19 10:47:20,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1107 states, 612 states have (on average 1.2058823529411764) internal successors, (738), 627 states have internal predecessors, (738), 434 states have call successors, (434), 61 states have call predecessors, (434), 60 states have return successors, (432), 418 states have call predecessors, (432), 432 states have call successors, (432) [2022-03-19 10:47:20,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1107 states to 1107 states and 1604 transitions. [2022-03-19 10:47:20,808 INFO L78 Accepts]: Start accepts. Automaton has 1107 states and 1604 transitions. Word has length 138 [2022-03-19 10:47:20,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:47:20,808 INFO L478 AbstractCegarLoop]: Abstraction has 1107 states and 1604 transitions. [2022-03-19 10:47:20,808 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2022-03-19 10:47:20,809 INFO L276 IsEmpty]: Start isEmpty. Operand 1107 states and 1604 transitions. [2022-03-19 10:47:20,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-19 10:47:20,811 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:47:20,811 INFO L500 BasicCegarLoop]: trace histogram [19, 18, 18, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:47:20,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-19 10:47:21,011 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:47:21,012 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:47:21,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:47:21,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1922165913, now seen corresponding path program 7 times [2022-03-19 10:47:21,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:47:21,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [977743144] [2022-03-19 10:47:21,012 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:47:21,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1922165913, now seen corresponding path program 8 times [2022-03-19 10:47:21,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:47:21,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747683480] [2022-03-19 10:47:21,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:47:21,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:47:21,017 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:47:21,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1371386569] [2022-03-19 10:47:21,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:47:21,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:47:21,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:47:21,019 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:47:21,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-19 10:47:21,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:47:21,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:47:21,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-19 10:47:21,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:47:21,408 INFO L134 CoverageAnalysis]: Checked inductivity of 732 backedges. 181 proven. 48 refuted. 0 times theorem prover too weak. 503 trivial. 0 not checked. [2022-03-19 10:47:21,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:47:31,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:47:31,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747683480] [2022-03-19 10:47:31,953 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:47:31,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371386569] [2022-03-19 10:47:31,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371386569] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 10:47:31,953 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 10:47:31,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-03-19 10:47:31,953 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:47:31,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [977743144] [2022-03-19 10:47:31,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [977743144] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:47:31,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:47:31,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 10:47:31,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195057166] [2022-03-19 10:47:31,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:47:31,954 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 10:47:31,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:47:31,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 10:47:31,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=463, Unknown=5, NotChecked=0, Total=552 [2022-03-19 10:47:31,954 INFO L87 Difference]: Start difference. First operand 1107 states and 1604 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 7 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2022-03-19 10:47:32,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:47:32,773 INFO L93 Difference]: Finished difference Result 1697 states and 2488 transitions. [2022-03-19 10:47:32,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 10:47:32,774 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 7 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) Word has length 143 [2022-03-19 10:47:32,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:47:32,779 INFO L225 Difference]: With dead ends: 1697 [2022-03-19 10:47:32,779 INFO L226 Difference]: Without dead ends: 1201 [2022-03-19 10:47:32,780 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=240, Invalid=945, Unknown=5, NotChecked=0, Total=1190 [2022-03-19 10:47:32,781 INFO L912 BasicCegarLoop]: 80 mSDtfsCounter, 50 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 10:47:32,781 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 598 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 10:47:32,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2022-03-19 10:47:33,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 1173. [2022-03-19 10:47:33,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1173 states, 634 states have (on average 1.1987381703470033) internal successors, (760), 649 states have internal predecessors, (760), 478 states have call successors, (478), 61 states have call predecessors, (478), 60 states have return successors, (476), 462 states have call predecessors, (476), 476 states have call successors, (476) [2022-03-19 10:47:33,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 1714 transitions. [2022-03-19 10:47:33,314 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 1714 transitions. Word has length 143 [2022-03-19 10:47:33,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:47:33,314 INFO L478 AbstractCegarLoop]: Abstraction has 1173 states and 1714 transitions. [2022-03-19 10:47:33,314 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 7 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2022-03-19 10:47:33,314 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 1714 transitions. [2022-03-19 10:47:33,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-03-19 10:47:33,331 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:47:33,331 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:47:33,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-19 10:47:33,531 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-03-19 10:47:33,531 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:47:33,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:47:33,532 INFO L85 PathProgramCache]: Analyzing trace with hash -20730755, now seen corresponding path program 29 times [2022-03-19 10:47:33,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:47:33,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1762314666] [2022-03-19 10:47:33,532 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:47:33,532 INFO L85 PathProgramCache]: Analyzing trace with hash -20730755, now seen corresponding path program 30 times [2022-03-19 10:47:33,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:47:33,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313107529] [2022-03-19 10:47:33,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:47:33,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:47:33,537 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:47:33,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [391337656] [2022-03-19 10:47:33,538 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 10:47:33,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:47:33,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:47:33,539 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:47:33,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-19 10:47:33,622 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-19 10:47:33,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:47:33,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 104 conjunts are in the unsatisfiable core [2022-03-19 10:47:33,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:47:35,345 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:47:35,346 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:47:37,787 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 135 proven. 128 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2022-03-19 10:47:37,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:47:47,556 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:47:47,557 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:47:52,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:47:52,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313107529] [2022-03-19 10:47:52,270 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:47:52,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391337656] [2022-03-19 10:47:52,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391337656] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 10:47:52,270 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 10:47:52,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2022-03-19 10:47:52,270 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:47:52,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1762314666] [2022-03-19 10:47:52,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1762314666] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:47:52,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:47:52,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-19 10:47:52,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279752684] [2022-03-19 10:47:52,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:47:52,271 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-19 10:47:52,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:47:52,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-19 10:47:52,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=884, Unknown=5, NotChecked=0, Total=1056 [2022-03-19 10:47:52,271 INFO L87 Difference]: Start difference. First operand 1173 states and 1714 transitions. Second operand has 22 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2022-03-19 10:47:57,107 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 10:47:58,668 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 10:47:59,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:47:59,863 INFO L93 Difference]: Finished difference Result 1295 states and 1883 transitions. [2022-03-19 10:47:59,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-19 10:47:59,867 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) Word has length 141 [2022-03-19 10:47:59,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:47:59,872 INFO L225 Difference]: With dead ends: 1295 [2022-03-19 10:47:59,872 INFO L226 Difference]: Without dead ends: 1292 [2022-03-19 10:47:59,873 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 166 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=239, Invalid=1316, Unknown=5, NotChecked=0, Total=1560 [2022-03-19 10:47:59,873 INFO L912 BasicCegarLoop]: 59 mSDtfsCounter, 72 mSDsluCounter, 731 mSDsCounter, 0 mSdLazyCounter, 1150 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 790 SdHoareTripleChecker+Invalid, 1237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:47:59,874 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 790 Invalid, 1237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1150 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-03-19 10:47:59,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1292 states. [2022-03-19 10:48:00,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1292 to 1172. [2022-03-19 10:48:00,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1172 states, 634 states have (on average 1.1987381703470033) internal successors, (760), 649 states have internal predecessors, (760), 477 states have call successors, (477), 61 states have call predecessors, (477), 60 states have return successors, (475), 461 states have call predecessors, (475), 475 states have call successors, (475) [2022-03-19 10:48:00,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1172 states to 1172 states and 1712 transitions. [2022-03-19 10:48:00,286 INFO L78 Accepts]: Start accepts. Automaton has 1172 states and 1712 transitions. Word has length 141 [2022-03-19 10:48:00,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:48:00,286 INFO L478 AbstractCegarLoop]: Abstraction has 1172 states and 1712 transitions. [2022-03-19 10:48:00,287 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2022-03-19 10:48:00,287 INFO L276 IsEmpty]: Start isEmpty. Operand 1172 states and 1712 transitions. [2022-03-19 10:48:00,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-19 10:48:00,288 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:48:00,288 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:48:00,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-19 10:48:00,504 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-19 10:48:00,504 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:48:00,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:48:00,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1824189762, now seen corresponding path program 31 times [2022-03-19 10:48:00,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:48:00,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [855160133] [2022-03-19 10:48:00,505 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:48:00,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1824189762, now seen corresponding path program 32 times [2022-03-19 10:48:00,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:48:00,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670316812] [2022-03-19 10:48:00,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:48:00,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:48:00,510 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:48:00,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1533005213] [2022-03-19 10:48:00,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:48:00,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:48:00,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:48:00,511 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:48:00,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-19 10:48:00,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:48:00,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:48:00,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 111 conjunts are in the unsatisfiable core [2022-03-19 10:48:00,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:48:01,809 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 106 proven. 142 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2022-03-19 10:48:01,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:48:02,497 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:48:04,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:48:04,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670316812] [2022-03-19 10:48:04,666 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:48:04,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533005213] [2022-03-19 10:48:04,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533005213] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 10:48:04,667 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 10:48:04,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2022-03-19 10:48:04,667 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:48:04,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [855160133] [2022-03-19 10:48:04,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [855160133] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:48:04,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:48:04,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-19 10:48:04,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305199719] [2022-03-19 10:48:04,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:48:04,667 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-19 10:48:04,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:48:04,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-19 10:48:04,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2022-03-19 10:48:04,668 INFO L87 Difference]: Start difference. First operand 1172 states and 1712 transitions. Second operand has 22 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2022-03-19 10:48:07,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:48:07,128 INFO L93 Difference]: Finished difference Result 1323 states and 1929 transitions. [2022-03-19 10:48:07,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-19 10:48:07,129 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) Word has length 143 [2022-03-19 10:48:07,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:48:07,133 INFO L225 Difference]: With dead ends: 1323 [2022-03-19 10:48:07,133 INFO L226 Difference]: Without dead ends: 1320 [2022-03-19 10:48:07,134 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 135 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=188, Invalid=1534, Unknown=0, NotChecked=0, Total=1722 [2022-03-19 10:48:07,135 INFO L912 BasicCegarLoop]: 72 mSDtfsCounter, 92 mSDsluCounter, 1157 mSDsCounter, 0 mSdLazyCounter, 1853 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 1229 SdHoareTripleChecker+Invalid, 1957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-19 10:48:07,135 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 1229 Invalid, 1957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1853 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-19 10:48:07,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2022-03-19 10:48:07,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 1274. [2022-03-19 10:48:07,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1274 states, 686 states have (on average 1.2026239067055393) internal successors, (825), 702 states have internal predecessors, (825), 523 states have call successors, (523), 65 states have call predecessors, (523), 64 states have return successors, (521), 506 states have call predecessors, (521), 521 states have call successors, (521) [2022-03-19 10:48:07,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1274 states to 1274 states and 1869 transitions. [2022-03-19 10:48:07,580 INFO L78 Accepts]: Start accepts. Automaton has 1274 states and 1869 transitions. Word has length 143 [2022-03-19 10:48:07,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:48:07,580 INFO L478 AbstractCegarLoop]: Abstraction has 1274 states and 1869 transitions. [2022-03-19 10:48:07,580 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2022-03-19 10:48:07,580 INFO L276 IsEmpty]: Start isEmpty. Operand 1274 states and 1869 transitions. [2022-03-19 10:48:07,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-19 10:48:07,582 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:48:07,582 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:48:07,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-19 10:48:07,798 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-19 10:48:07,798 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:48:07,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:48:07,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1701564030, now seen corresponding path program 33 times [2022-03-19 10:48:07,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:48:07,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1515523976] [2022-03-19 10:48:07,799 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:48:07,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1701564030, now seen corresponding path program 34 times [2022-03-19 10:48:07,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:48:07,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589303658] [2022-03-19 10:48:07,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:48:07,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:48:07,804 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:48:07,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [421633903] [2022-03-19 10:48:07,804 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:48:07,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:48:07,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:48:07,805 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:48:07,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-19 10:48:07,881 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:48:07,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:48:07,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 94 conjunts are in the unsatisfiable core [2022-03-19 10:48:07,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:48:10,609 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 119 proven. 102 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2022-03-19 10:48:10,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:48:11,239 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:48:13,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:48:13,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589303658] [2022-03-19 10:48:13,535 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:48:13,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421633903] [2022-03-19 10:48:13,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421633903] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 10:48:13,536 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 10:48:13,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-03-19 10:48:13,536 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:48:13,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1515523976] [2022-03-19 10:48:13,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1515523976] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:48:13,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:48:13,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-19 10:48:13,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904471985] [2022-03-19 10:48:13,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:48:13,536 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-19 10:48:13,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:48:13,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-19 10:48:13,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2022-03-19 10:48:13,537 INFO L87 Difference]: Start difference. First operand 1274 states and 1869 transitions. Second operand has 23 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2022-03-19 10:48:17,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:48:17,935 INFO L93 Difference]: Finished difference Result 1480 states and 2173 transitions. [2022-03-19 10:48:17,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-19 10:48:17,936 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) Word has length 143 [2022-03-19 10:48:17,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:48:17,960 INFO L225 Difference]: With dead ends: 1480 [2022-03-19 10:48:17,960 INFO L226 Difference]: Without dead ends: 1477 [2022-03-19 10:48:17,961 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=209, Invalid=1771, Unknown=0, NotChecked=0, Total=1980 [2022-03-19 10:48:17,962 INFO L912 BasicCegarLoop]: 74 mSDtfsCounter, 95 mSDsluCounter, 993 mSDsCounter, 0 mSdLazyCounter, 1631 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 1067 SdHoareTripleChecker+Invalid, 1731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:48:17,962 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 1067 Invalid, 1731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1631 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-03-19 10:48:17,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1477 states. [2022-03-19 10:48:18,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1477 to 1355. [2022-03-19 10:48:18,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1355 states, 730 states have (on average 1.204109589041096) internal successors, (879), 748 states have internal predecessors, (879), 558 states have call successors, (558), 67 states have call predecessors, (558), 66 states have return successors, (556), 539 states have call predecessors, (556), 556 states have call successors, (556) [2022-03-19 10:48:18,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1355 states to 1355 states and 1993 transitions. [2022-03-19 10:48:18,498 INFO L78 Accepts]: Start accepts. Automaton has 1355 states and 1993 transitions. Word has length 143 [2022-03-19 10:48:18,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:48:18,498 INFO L478 AbstractCegarLoop]: Abstraction has 1355 states and 1993 transitions. [2022-03-19 10:48:18,498 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2022-03-19 10:48:18,498 INFO L276 IsEmpty]: Start isEmpty. Operand 1355 states and 1993 transitions. [2022-03-19 10:48:18,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-03-19 10:48:18,499 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:48:18,499 INFO L500 BasicCegarLoop]: trace histogram [18, 17, 17, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:48:18,516 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-03-19 10:48:18,715 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:48:18,715 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:48:18,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:48:18,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1351700721, now seen corresponding path program 9 times [2022-03-19 10:48:18,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:48:18,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1276829356] [2022-03-19 10:48:18,716 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:48:18,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1351700721, now seen corresponding path program 10 times [2022-03-19 10:48:18,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:48:18,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863117537] [2022-03-19 10:48:18,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:48:18,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:48:18,721 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:48:18,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1195261836] [2022-03-19 10:48:18,721 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:48:18,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:48:18,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:48:18,723 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:48:18,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-19 10:48:18,773 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:48:18,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:48:18,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-19 10:48:18,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:48:19,251 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 132 proven. 47 refuted. 0 times theorem prover too weak. 499 trivial. 0 not checked. [2022-03-19 10:48:19,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:48:19,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:48:19,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863117537] [2022-03-19 10:48:19,534 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:48:19,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195261836] [2022-03-19 10:48:19,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195261836] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 10:48:19,534 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 10:48:19,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-03-19 10:48:19,534 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:48:19,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1276829356] [2022-03-19 10:48:19,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1276829356] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:48:19,534 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:48:19,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 10:48:19,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389501805] [2022-03-19 10:48:19,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:48:19,535 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 10:48:19,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:48:19,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 10:48:19,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-03-19 10:48:19,535 INFO L87 Difference]: Start difference. First operand 1355 states and 1993 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 7 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2022-03-19 10:48:20,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:48:20,745 INFO L93 Difference]: Finished difference Result 1787 states and 2660 transitions. [2022-03-19 10:48:20,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 10:48:20,745 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 7 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) Word has length 146 [2022-03-19 10:48:20,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:48:20,751 INFO L225 Difference]: With dead ends: 1787 [2022-03-19 10:48:20,751 INFO L226 Difference]: Without dead ends: 1527 [2022-03-19 10:48:20,752 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 192 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=199, Invalid=731, Unknown=0, NotChecked=0, Total=930 [2022-03-19 10:48:20,752 INFO L912 BasicCegarLoop]: 82 mSDtfsCounter, 51 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 10:48:20,753 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 719 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 10:48:20,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1527 states. [2022-03-19 10:48:21,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1527 to 1313. [2022-03-19 10:48:21,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1313 states, 723 states have (on average 1.2033195020746887) internal successors, (870), 740 states have internal predecessors, (870), 524 states have call successors, (524), 66 states have call predecessors, (524), 65 states have return successors, (522), 506 states have call predecessors, (522), 522 states have call successors, (522) [2022-03-19 10:48:21,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1313 states to 1313 states and 1916 transitions. [2022-03-19 10:48:21,346 INFO L78 Accepts]: Start accepts. Automaton has 1313 states and 1916 transitions. Word has length 146 [2022-03-19 10:48:21,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:48:21,347 INFO L478 AbstractCegarLoop]: Abstraction has 1313 states and 1916 transitions. [2022-03-19 10:48:21,347 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 7 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2022-03-19 10:48:21,347 INFO L276 IsEmpty]: Start isEmpty. Operand 1313 states and 1916 transitions. [2022-03-19 10:48:21,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-03-19 10:48:21,348 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:48:21,348 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:48:21,364 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-03-19 10:48:21,564 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-19 10:48:21,564 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:48:21,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:48:21,565 INFO L85 PathProgramCache]: Analyzing trace with hash -780316161, now seen corresponding path program 35 times [2022-03-19 10:48:21,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:48:21,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [991955696] [2022-03-19 10:48:21,565 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:48:21,565 INFO L85 PathProgramCache]: Analyzing trace with hash -780316161, now seen corresponding path program 36 times [2022-03-19 10:48:21,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:48:21,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749493752] [2022-03-19 10:48:21,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:48:21,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:48:21,573 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:48:21,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [381885471] [2022-03-19 10:48:21,573 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 10:48:21,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:48:21,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:48:21,574 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:48:21,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-19 10:48:21,704 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-19 10:48:21,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:48:21,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 113 conjunts are in the unsatisfiable core [2022-03-19 10:48:21,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:48:23,765 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 49 proven. 121 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2022-03-19 10:48:23,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:48:32,354 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 46 proven. 115 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2022-03-19 10:48:32,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:48:32,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749493752] [2022-03-19 10:48:32,354 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:48:32,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381885471] [2022-03-19 10:48:32,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381885471] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:48:32,354 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:48:32,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 23] total 44 [2022-03-19 10:48:32,355 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:48:32,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [991955696] [2022-03-19 10:48:32,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [991955696] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:48:32,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:48:32,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-19 10:48:32,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282838338] [2022-03-19 10:48:32,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:48:32,355 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-19 10:48:32,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:48:32,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-19 10:48:32,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=1585, Unknown=0, NotChecked=0, Total=1892 [2022-03-19 10:48:32,356 INFO L87 Difference]: Start difference. First operand 1313 states and 1916 transitions. Second operand has 26 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 7 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2022-03-19 10:48:35,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:48:35,352 INFO L93 Difference]: Finished difference Result 1447 states and 2103 transitions. [2022-03-19 10:48:35,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-19 10:48:35,353 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 7 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) Word has length 146 [2022-03-19 10:48:35,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:48:35,359 INFO L225 Difference]: With dead ends: 1447 [2022-03-19 10:48:35,359 INFO L226 Difference]: Without dead ends: 1444 [2022-03-19 10:48:35,360 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 246 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=577, Invalid=2963, Unknown=0, NotChecked=0, Total=3540 [2022-03-19 10:48:35,360 INFO L912 BasicCegarLoop]: 60 mSDtfsCounter, 120 mSDsluCounter, 917 mSDsCounter, 0 mSdLazyCounter, 1920 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 977 SdHoareTripleChecker+Invalid, 2035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-19 10:48:35,360 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 977 Invalid, 2035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1920 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-19 10:48:35,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1444 states. [2022-03-19 10:48:35,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1444 to 1403. [2022-03-19 10:48:35,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1403 states, 773 states have (on average 1.203104786545925) internal successors, (930), 790 states have internal predecessors, (930), 560 states have call successors, (560), 70 states have call predecessors, (560), 69 states have return successors, (558), 542 states have call predecessors, (558), 558 states have call successors, (558) [2022-03-19 10:48:35,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1403 states to 1403 states and 2048 transitions. [2022-03-19 10:48:35,950 INFO L78 Accepts]: Start accepts. Automaton has 1403 states and 2048 transitions. Word has length 146 [2022-03-19 10:48:35,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:48:35,951 INFO L478 AbstractCegarLoop]: Abstraction has 1403 states and 2048 transitions. [2022-03-19 10:48:35,951 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 7 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2022-03-19 10:48:35,951 INFO L276 IsEmpty]: Start isEmpty. Operand 1403 states and 2048 transitions. [2022-03-19 10:48:35,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-03-19 10:48:35,952 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:48:35,953 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:48:35,985 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-03-19 10:48:36,186 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-19 10:48:36,186 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:48:36,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:48:36,187 INFO L85 PathProgramCache]: Analyzing trace with hash 829249481, now seen corresponding path program 37 times [2022-03-19 10:48:36,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:48:36,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1288759360] [2022-03-19 10:48:36,187 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:48:36,187 INFO L85 PathProgramCache]: Analyzing trace with hash 829249481, now seen corresponding path program 38 times [2022-03-19 10:48:36,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:48:36,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345621580] [2022-03-19 10:48:36,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:48:36,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:48:36,197 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:48:36,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [445823142] [2022-03-19 10:48:36,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:48:36,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:48:36,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:48:36,199 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:48:36,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-19 10:48:36,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:48:36,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:48:36,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 117 conjunts are in the unsatisfiable core [2022-03-19 10:48:36,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:48:37,579 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 142 proven. 118 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2022-03-19 10:48:37,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:48:38,315 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:48:39,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:48:39,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345621580] [2022-03-19 10:48:39,322 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:48:39,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445823142] [2022-03-19 10:48:39,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445823142] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 10:48:39,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 10:48:39,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2022-03-19 10:48:39,322 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:48:39,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1288759360] [2022-03-19 10:48:39,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1288759360] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:48:39,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:48:39,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-19 10:48:39,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202530172] [2022-03-19 10:48:39,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:48:39,323 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-19 10:48:39,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:48:39,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-19 10:48:39,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2022-03-19 10:48:39,324 INFO L87 Difference]: Start difference. First operand 1403 states and 2048 transitions. Second operand has 22 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2022-03-19 10:48:43,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:48:43,494 INFO L93 Difference]: Finished difference Result 1624 states and 2367 transitions. [2022-03-19 10:48:43,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-19 10:48:43,496 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) Word has length 146 [2022-03-19 10:48:43,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:48:43,533 INFO L225 Difference]: With dead ends: 1624 [2022-03-19 10:48:43,533 INFO L226 Difference]: Without dead ends: 1621 [2022-03-19 10:48:43,534 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 137 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=191, Invalid=1615, Unknown=0, NotChecked=0, Total=1806 [2022-03-19 10:48:43,534 INFO L912 BasicCegarLoop]: 66 mSDtfsCounter, 100 mSDsluCounter, 908 mSDsCounter, 0 mSdLazyCounter, 1564 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 974 SdHoareTripleChecker+Invalid, 1673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-19 10:48:43,534 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 974 Invalid, 1673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1564 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-19 10:48:43,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1621 states. [2022-03-19 10:48:44,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1621 to 1495. [2022-03-19 10:48:44,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1495 states, 826 states have (on average 1.2033898305084745) internal successors, (994), 845 states have internal predecessors, (994), 595 states have call successors, (595), 74 states have call predecessors, (595), 73 states have return successors, (593), 575 states have call predecessors, (593), 593 states have call successors, (593) [2022-03-19 10:48:44,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1495 states to 1495 states and 2182 transitions. [2022-03-19 10:48:44,197 INFO L78 Accepts]: Start accepts. Automaton has 1495 states and 2182 transitions. Word has length 146 [2022-03-19 10:48:44,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:48:44,197 INFO L478 AbstractCegarLoop]: Abstraction has 1495 states and 2182 transitions. [2022-03-19 10:48:44,197 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2022-03-19 10:48:44,197 INFO L276 IsEmpty]: Start isEmpty. Operand 1495 states and 2182 transitions. [2022-03-19 10:48:44,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-03-19 10:48:44,199 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:48:44,199 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 7, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:48:44,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-19 10:48:44,415 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-19 10:48:44,415 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:48:44,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:48:44,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1748446329, now seen corresponding path program 39 times [2022-03-19 10:48:44,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:48:44,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1510818078] [2022-03-19 10:48:44,416 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:48:44,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1748446329, now seen corresponding path program 40 times [2022-03-19 10:48:44,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:48:44,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096431096] [2022-03-19 10:48:44,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:48:44,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:48:44,421 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:48:44,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [604742659] [2022-03-19 10:48:44,421 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:48:44,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:48:44,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:48:44,431 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:48:44,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-19 10:48:44,511 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:48:44,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:48:44,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 127 conjunts are in the unsatisfiable core [2022-03-19 10:48:44,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:48:44,842 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:48:45,992 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 145 proven. 138 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2022-03-19 10:48:45,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:48:46,670 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:48:49,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:48:49,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096431096] [2022-03-19 10:48:49,607 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:48:49,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604742659] [2022-03-19 10:48:49,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604742659] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 10:48:49,607 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 10:48:49,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2022-03-19 10:48:49,607 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:48:49,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1510818078] [2022-03-19 10:48:49,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1510818078] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:48:49,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:48:49,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-19 10:48:49,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197566359] [2022-03-19 10:48:49,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:48:49,608 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-19 10:48:49,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:48:49,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-19 10:48:49,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2022-03-19 10:48:49,608 INFO L87 Difference]: Start difference. First operand 1495 states and 2182 transitions. Second operand has 26 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) [2022-03-19 10:48:54,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:48:54,012 INFO L93 Difference]: Finished difference Result 1653 states and 2396 transitions. [2022-03-19 10:48:54,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-19 10:48:54,013 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) Word has length 151 [2022-03-19 10:48:54,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:48:54,032 INFO L225 Difference]: With dead ends: 1653 [2022-03-19 10:48:54,032 INFO L226 Difference]: Without dead ends: 1650 [2022-03-19 10:48:54,032 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=189, Invalid=1881, Unknown=0, NotChecked=0, Total=2070 [2022-03-19 10:48:54,033 INFO L912 BasicCegarLoop]: 75 mSDtfsCounter, 108 mSDsluCounter, 1300 mSDsCounter, 0 mSdLazyCounter, 2220 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 1375 SdHoareTripleChecker+Invalid, 2318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 2220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-03-19 10:48:54,034 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 1375 Invalid, 2318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 2220 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-03-19 10:48:54,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1650 states. [2022-03-19 10:48:54,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1650 to 1594. [2022-03-19 10:48:54,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1594 states, 882 states have (on average 1.2029478458049887) internal successors, (1061), 903 states have internal predecessors, (1061), 632 states have call successors, (632), 80 states have call predecessors, (632), 79 states have return successors, (630), 610 states have call predecessors, (630), 630 states have call successors, (630) [2022-03-19 10:48:54,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 2323 transitions. [2022-03-19 10:48:54,719 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 2323 transitions. Word has length 151 [2022-03-19 10:48:54,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:48:54,719 INFO L478 AbstractCegarLoop]: Abstraction has 1594 states and 2323 transitions. [2022-03-19 10:48:54,720 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) [2022-03-19 10:48:54,720 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 2323 transitions. [2022-03-19 10:48:54,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-03-19 10:48:54,721 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:48:54,721 INFO L500 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:48:54,738 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-03-19 10:48:54,935 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-03-19 10:48:54,935 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:48:54,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:48:54,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1293461113, now seen corresponding path program 41 times [2022-03-19 10:48:54,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:48:54,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [41734061] [2022-03-19 10:48:54,936 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:48:54,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1293461113, now seen corresponding path program 42 times [2022-03-19 10:48:54,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:48:54,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046893250] [2022-03-19 10:48:54,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:48:54,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:48:54,941 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:48:54,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1021497361] [2022-03-19 10:48:54,942 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 10:48:54,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:48:54,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:48:54,943 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:48:54,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-19 10:48:55,014 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-03-19 10:48:55,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:48:55,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-19 10:48:55,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:48:55,414 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 40 proven. 78 refuted. 0 times theorem prover too weak. 775 trivial. 0 not checked. [2022-03-19 10:48:55,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:48:56,520 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 79 proven. 39 refuted. 0 times theorem prover too weak. 775 trivial. 0 not checked. [2022-03-19 10:48:56,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:48:56,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046893250] [2022-03-19 10:48:56,520 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:48:56,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021497361] [2022-03-19 10:48:56,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021497361] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:48:56,521 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:48:56,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 25 [2022-03-19 10:48:56,521 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:48:56,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [41734061] [2022-03-19 10:48:56,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [41734061] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:48:56,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:48:56,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 10:48:56,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420687086] [2022-03-19 10:48:56,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:48:56,522 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 10:48:56,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:48:56,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 10:48:56,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-03-19 10:48:56,522 INFO L87 Difference]: Start difference. First operand 1594 states and 2323 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 8 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-03-19 10:48:58,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:48:58,536 INFO L93 Difference]: Finished difference Result 1830 states and 2693 transitions. [2022-03-19 10:48:58,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-19 10:48:58,537 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 8 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) Word has length 155 [2022-03-19 10:48:58,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:48:58,563 INFO L225 Difference]: With dead ends: 1830 [2022-03-19 10:48:58,563 INFO L226 Difference]: Without dead ends: 1820 [2022-03-19 10:48:58,564 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 283 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=587, Invalid=1765, Unknown=0, NotChecked=0, Total=2352 [2022-03-19 10:48:58,564 INFO L912 BasicCegarLoop]: 123 mSDtfsCounter, 106 mSDsluCounter, 623 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 746 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 10:48:58,564 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 746 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 10:48:58,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1820 states. [2022-03-19 10:48:59,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1820 to 1741. [2022-03-19 10:48:59,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1741 states, 957 states have (on average 1.205851619644723) internal successors, (1154), 980 states have internal predecessors, (1154), 704 states have call successors, (704), 80 states have call predecessors, (704), 79 states have return successors, (702), 680 states have call predecessors, (702), 702 states have call successors, (702) [2022-03-19 10:48:59,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1741 states to 1741 states and 2560 transitions. [2022-03-19 10:48:59,324 INFO L78 Accepts]: Start accepts. Automaton has 1741 states and 2560 transitions. Word has length 155 [2022-03-19 10:48:59,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:48:59,325 INFO L478 AbstractCegarLoop]: Abstraction has 1741 states and 2560 transitions. [2022-03-19 10:48:59,325 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 8 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-03-19 10:48:59,325 INFO L276 IsEmpty]: Start isEmpty. Operand 1741 states and 2560 transitions. [2022-03-19 10:48:59,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-03-19 10:48:59,327 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:48:59,327 INFO L500 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:48:59,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-19 10:48:59,545 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:48:59,546 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:48:59,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:48:59,546 INFO L85 PathProgramCache]: Analyzing trace with hash -624413815, now seen corresponding path program 43 times [2022-03-19 10:48:59,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:48:59,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1629293515] [2022-03-19 10:48:59,546 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:48:59,547 INFO L85 PathProgramCache]: Analyzing trace with hash -624413815, now seen corresponding path program 44 times [2022-03-19 10:48:59,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:48:59,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530494703] [2022-03-19 10:48:59,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:48:59,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:48:59,552 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:48:59,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1864700695] [2022-03-19 10:48:59,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:48:59,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:48:59,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:48:59,553 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:48:59,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-19 10:48:59,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:48:59,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:48:59,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-19 10:48:59,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:49:00,100 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 50 proven. 79 refuted. 0 times theorem prover too weak. 775 trivial. 0 not checked. [2022-03-19 10:49:00,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:49:00,523 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 48 proven. 81 refuted. 0 times theorem prover too weak. 775 trivial. 0 not checked. [2022-03-19 10:49:00,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:49:00,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530494703] [2022-03-19 10:49:00,524 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:49:00,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864700695] [2022-03-19 10:49:00,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864700695] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:49:00,524 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:49:00,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2022-03-19 10:49:00,524 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:49:00,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1629293515] [2022-03-19 10:49:00,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1629293515] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:49:00,524 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:49:00,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 10:49:00,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136340588] [2022-03-19 10:49:00,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:49:00,525 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 10:49:00,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:49:00,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 10:49:00,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-03-19 10:49:00,525 INFO L87 Difference]: Start difference. First operand 1741 states and 2560 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 8 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-03-19 10:49:02,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:49:02,439 INFO L93 Difference]: Finished difference Result 2804 states and 4299 transitions. [2022-03-19 10:49:02,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-19 10:49:02,440 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 8 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) Word has length 160 [2022-03-19 10:49:02,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:49:02,447 INFO L225 Difference]: With dead ends: 2804 [2022-03-19 10:49:02,447 INFO L226 Difference]: Without dead ends: 2529 [2022-03-19 10:49:02,463 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 296 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=252, Invalid=1154, Unknown=0, NotChecked=0, Total=1406 [2022-03-19 10:49:02,464 INFO L912 BasicCegarLoop]: 104 mSDtfsCounter, 63 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 10:49:02,465 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 731 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 10:49:02,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2529 states. [2022-03-19 10:49:03,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2529 to 2050. [2022-03-19 10:49:03,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2050 states, 1098 states have (on average 1.2176684881602915) internal successors, (1337), 1121 states have internal predecessors, (1337), 872 states have call successors, (872), 80 states have call predecessors, (872), 79 states have return successors, (870), 848 states have call predecessors, (870), 870 states have call successors, (870) [2022-03-19 10:49:03,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2050 states to 2050 states and 3079 transitions. [2022-03-19 10:49:03,493 INFO L78 Accepts]: Start accepts. Automaton has 2050 states and 3079 transitions. Word has length 160 [2022-03-19 10:49:03,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:49:03,494 INFO L478 AbstractCegarLoop]: Abstraction has 2050 states and 3079 transitions. [2022-03-19 10:49:03,494 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 8 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-03-19 10:49:03,494 INFO L276 IsEmpty]: Start isEmpty. Operand 2050 states and 3079 transitions. [2022-03-19 10:49:03,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-03-19 10:49:03,496 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:49:03,496 INFO L500 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:49:03,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-19 10:49:03,712 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:49:03,712 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:49:03,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:49:03,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1428542047, now seen corresponding path program 45 times [2022-03-19 10:49:03,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:49:03,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [307224228] [2022-03-19 10:49:03,713 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:49:03,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1428542047, now seen corresponding path program 46 times [2022-03-19 10:49:03,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:49:03,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949148411] [2022-03-19 10:49:03,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:49:03,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:49:03,724 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:49:03,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1554449131] [2022-03-19 10:49:03,724 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:49:03,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:49:03,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:49:03,725 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:49:03,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-19 10:49:03,791 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:49:03,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:49:03,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-19 10:49:03,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:49:04,353 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 45 proven. 84 refuted. 0 times theorem prover too weak. 775 trivial. 0 not checked. [2022-03-19 10:49:04,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:49:05,605 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 45 proven. 84 refuted. 0 times theorem prover too weak. 775 trivial. 0 not checked. [2022-03-19 10:49:05,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:49:05,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949148411] [2022-03-19 10:49:05,605 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:49:05,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554449131] [2022-03-19 10:49:05,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554449131] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:49:05,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:49:05,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2022-03-19 10:49:05,606 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:49:05,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [307224228] [2022-03-19 10:49:05,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [307224228] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:49:05,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:49:05,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 10:49:05,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598621745] [2022-03-19 10:49:05,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:49:05,606 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 10:49:05,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:49:05,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 10:49:05,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2022-03-19 10:49:05,607 INFO L87 Difference]: Start difference. First operand 2050 states and 3079 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 8 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-03-19 10:49:07,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:49:07,933 INFO L93 Difference]: Finished difference Result 2106 states and 3155 transitions. [2022-03-19 10:49:07,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-19 10:49:07,934 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 8 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) Word has length 160 [2022-03-19 10:49:07,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:49:07,939 INFO L225 Difference]: With dead ends: 2106 [2022-03-19 10:49:07,939 INFO L226 Difference]: Without dead ends: 2096 [2022-03-19 10:49:07,940 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=304, Invalid=1676, Unknown=0, NotChecked=0, Total=1980 [2022-03-19 10:49:07,940 INFO L912 BasicCegarLoop]: 107 mSDtfsCounter, 93 mSDsluCounter, 781 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 888 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-19 10:49:07,940 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 888 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-19 10:49:07,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2096 states. [2022-03-19 10:49:08,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2096 to 2050. [2022-03-19 10:49:08,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2050 states, 1098 states have (on average 1.2167577413479054) internal successors, (1336), 1121 states have internal predecessors, (1336), 872 states have call successors, (872), 80 states have call predecessors, (872), 79 states have return successors, (870), 848 states have call predecessors, (870), 870 states have call successors, (870) [2022-03-19 10:49:08,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2050 states to 2050 states and 3078 transitions. [2022-03-19 10:49:08,883 INFO L78 Accepts]: Start accepts. Automaton has 2050 states and 3078 transitions. Word has length 160 [2022-03-19 10:49:08,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:49:08,883 INFO L478 AbstractCegarLoop]: Abstraction has 2050 states and 3078 transitions. [2022-03-19 10:49:08,883 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 8 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-03-19 10:49:08,883 INFO L276 IsEmpty]: Start isEmpty. Operand 2050 states and 3078 transitions. [2022-03-19 10:49:08,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-03-19 10:49:08,885 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:49:08,885 INFO L500 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:49:08,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-19 10:49:09,101 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-03-19 10:49:09,101 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:49:09,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:49:09,102 INFO L85 PathProgramCache]: Analyzing trace with hash 2097211745, now seen corresponding path program 47 times [2022-03-19 10:49:09,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:49:09,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1924322046] [2022-03-19 10:49:09,102 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:49:09,102 INFO L85 PathProgramCache]: Analyzing trace with hash 2097211745, now seen corresponding path program 48 times [2022-03-19 10:49:09,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:49:09,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195958953] [2022-03-19 10:49:09,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:49:09,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:49:09,107 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:49:09,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1247446227] [2022-03-19 10:49:09,107 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 10:49:09,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:49:09,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:49:09,108 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:49:09,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-19 10:49:09,180 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 10:49:09,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:49:09,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 86 conjunts are in the unsatisfiable core [2022-03-19 10:49:09,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:49:10,241 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:49:10,242 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:49:10,245 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:49:10,247 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:49:10,248 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:49:21,989 WARN L232 SmtUtils]: Spent 8.30s on a formula simplification that was a NOOP. DAG size: 79 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 10:49:30,996 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 127 proven. 128 refuted. 0 times theorem prover too weak. 649 trivial. 0 not checked. [2022-03-19 10:49:30,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:49:33,177 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:49:37,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:49:37,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195958953] [2022-03-19 10:49:37,390 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:49:37,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247446227] [2022-03-19 10:49:37,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247446227] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 10:49:37,390 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 10:49:37,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-03-19 10:49:37,390 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:49:37,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1924322046] [2022-03-19 10:49:37,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1924322046] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:49:37,390 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:49:37,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-19 10:49:37,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457004265] [2022-03-19 10:49:37,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:49:37,391 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 10:49:37,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:49:37,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 10:49:37,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=517, Unknown=2, NotChecked=0, Total=600 [2022-03-19 10:49:37,391 INFO L87 Difference]: Start difference. First operand 2050 states and 3078 transitions. Second operand has 18 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) [2022-03-19 10:49:42,661 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 10:49:45,983 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 10:49:48,377 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 10:49:55,366 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 10:49:59,615 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 10:50:01,926 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 10:50:02,938 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 10:50:04,139 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 10:50:06,142 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 10:50:09,572 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 10:50:14,748 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 10:50:17,310 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 10:50:25,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:50:25,581 INFO L93 Difference]: Finished difference Result 2558 states and 3848 transitions. [2022-03-19 10:50:25,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 10:50:25,582 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) Word has length 160 [2022-03-19 10:50:25,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:50:25,588 INFO L225 Difference]: With dead ends: 2558 [2022-03-19 10:50:25,588 INFO L226 Difference]: Without dead ends: 2555 [2022-03-19 10:50:25,589 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 169 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 27.2s TimeCoverageRelationStatistics Valid=162, Invalid=1026, Unknown=2, NotChecked=0, Total=1190 [2022-03-19 10:50:25,589 INFO L912 BasicCegarLoop]: 60 mSDtfsCounter, 69 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 83 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.3s IncrementalHoareTripleChecker+Time [2022-03-19 10:50:25,589 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 711 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 880 Invalid, 9 Unknown, 0 Unchecked, 39.3s Time] [2022-03-19 10:50:25,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2555 states. [2022-03-19 10:50:26,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2555 to 2475. [2022-03-19 10:50:26,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2475 states, 1318 states have (on average 1.2215477996965098) internal successors, (1610), 1347 states have internal predecessors, (1610), 1069 states have call successors, (1069), 88 states have call predecessors, (1069), 87 states have return successors, (1067), 1039 states have call predecessors, (1067), 1067 states have call successors, (1067) [2022-03-19 10:50:26,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2475 states to 2475 states and 3746 transitions. [2022-03-19 10:50:26,864 INFO L78 Accepts]: Start accepts. Automaton has 2475 states and 3746 transitions. Word has length 160 [2022-03-19 10:50:26,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:50:26,865 INFO L478 AbstractCegarLoop]: Abstraction has 2475 states and 3746 transitions. [2022-03-19 10:50:26,865 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) [2022-03-19 10:50:26,865 INFO L276 IsEmpty]: Start isEmpty. Operand 2475 states and 3746 transitions. [2022-03-19 10:50:26,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-03-19 10:50:26,867 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:50:26,867 INFO L500 BasicCegarLoop]: trace histogram [23, 22, 22, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:50:26,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-19 10:50:27,079 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-03-19 10:50:27,079 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:50:27,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:50:27,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1031964217, now seen corresponding path program 1 times [2022-03-19 10:50:27,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:50:27,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1878436889] [2022-03-19 10:50:27,080 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:50:27,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1031964217, now seen corresponding path program 2 times [2022-03-19 10:50:27,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:50:27,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702687509] [2022-03-19 10:50:27,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:50:27,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:50:27,085 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:50:27,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2062501322] [2022-03-19 10:50:27,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:50:27,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:50:27,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:50:27,086 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:50:27,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-19 10:50:27,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:50:27,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:50:27,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-19 10:50:27,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:50:27,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1079 backedges. 224 proven. 72 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2022-03-19 10:50:27,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:50:38,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:50:38,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702687509] [2022-03-19 10:50:38,828 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:50:38,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062501322] [2022-03-19 10:50:38,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062501322] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 10:50:38,828 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 10:50:38,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-03-19 10:50:38,829 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:50:38,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1878436889] [2022-03-19 10:50:38,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1878436889] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:50:38,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:50:38,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 10:50:38,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685257992] [2022-03-19 10:50:38,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:50:38,829 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 10:50:38,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:50:38,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 10:50:38,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=555, Unknown=5, NotChecked=0, Total=650 [2022-03-19 10:50:38,830 INFO L87 Difference]: Start difference. First operand 2475 states and 3746 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 8 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2022-03-19 10:50:40,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:50:40,902 INFO L93 Difference]: Finished difference Result 2836 states and 4275 transitions. [2022-03-19 10:50:40,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 10:50:40,904 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 8 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) Word has length 163 [2022-03-19 10:50:40,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:50:40,911 INFO L225 Difference]: With dead ends: 2836 [2022-03-19 10:50:40,911 INFO L226 Difference]: Without dead ends: 2443 [2022-03-19 10:50:40,912 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 275 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=309, Invalid=1168, Unknown=5, NotChecked=0, Total=1482 [2022-03-19 10:50:40,912 INFO L912 BasicCegarLoop]: 80 mSDtfsCounter, 75 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 10:50:40,913 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 652 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 10:50:40,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2443 states. [2022-03-19 10:50:42,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2443 to 2431. [2022-03-19 10:50:42,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2431 states, 1299 states have (on average 1.2178598922247883) internal successors, (1582), 1329 states have internal predecessors, (1582), 1044 states have call successors, (1044), 88 states have call predecessors, (1044), 87 states have return successors, (1042), 1013 states have call predecessors, (1042), 1042 states have call successors, (1042) [2022-03-19 10:50:42,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2431 states to 2431 states and 3668 transitions. [2022-03-19 10:50:42,172 INFO L78 Accepts]: Start accepts. Automaton has 2431 states and 3668 transitions. Word has length 163 [2022-03-19 10:50:42,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:50:42,172 INFO L478 AbstractCegarLoop]: Abstraction has 2431 states and 3668 transitions. [2022-03-19 10:50:42,172 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 8 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2022-03-19 10:50:42,172 INFO L276 IsEmpty]: Start isEmpty. Operand 2431 states and 3668 transitions. [2022-03-19 10:50:42,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-03-19 10:50:42,174 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:50:42,174 INFO L500 BasicCegarLoop]: trace histogram [22, 21, 21, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:50:42,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-19 10:50:42,383 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-03-19 10:50:42,383 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:50:42,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:50:42,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1820223338, now seen corresponding path program 11 times [2022-03-19 10:50:42,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:50:42,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1748687589] [2022-03-19 10:50:42,384 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:50:42,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1820223338, now seen corresponding path program 12 times [2022-03-19 10:50:42,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:50:42,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614921367] [2022-03-19 10:50:42,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:50:42,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:50:42,395 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:50:42,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1097144459] [2022-03-19 10:50:42,396 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 10:50:42,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:50:42,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:50:42,397 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:50:42,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-19 10:50:42,452 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 10:50:42,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:50:42,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-19 10:50:42,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:50:42,905 INFO L134 CoverageAnalysis]: Checked inductivity of 996 backedges. 179 proven. 22 refuted. 0 times theorem prover too weak. 795 trivial. 0 not checked. [2022-03-19 10:50:42,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:50:47,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:50:47,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614921367] [2022-03-19 10:50:47,119 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:50:47,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097144459] [2022-03-19 10:50:47,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097144459] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 10:50:47,119 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 10:50:47,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-03-19 10:50:47,119 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:50:47,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1748687589] [2022-03-19 10:50:47,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1748687589] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:50:47,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:50:47,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 10:50:47,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712940976] [2022-03-19 10:50:47,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:50:47,120 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 10:50:47,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:50:47,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 10:50:47,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=314, Unknown=2, NotChecked=0, Total=380 [2022-03-19 10:50:47,120 INFO L87 Difference]: Start difference. First operand 2431 states and 3668 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 6 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2022-03-19 10:50:48,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:50:48,949 INFO L93 Difference]: Finished difference Result 2766 states and 4174 transitions. [2022-03-19 10:50:48,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-19 10:50:48,949 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 6 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) Word has length 163 [2022-03-19 10:50:48,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:50:48,961 INFO L225 Difference]: With dead ends: 2766 [2022-03-19 10:50:48,961 INFO L226 Difference]: Without dead ends: 2421 [2022-03-19 10:50:48,963 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 210 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=245, Invalid=875, Unknown=2, NotChecked=0, Total=1122 [2022-03-19 10:50:48,963 INFO L912 BasicCegarLoop]: 61 mSDtfsCounter, 52 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 10:50:48,963 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 437 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 10:50:48,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2421 states. [2022-03-19 10:50:50,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2421 to 2420. [2022-03-19 10:50:50,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2420 states, 1295 states have (on average 1.216988416988417) internal successors, (1576), 1325 states have internal predecessors, (1576), 1037 states have call successors, (1037), 88 states have call predecessors, (1037), 87 states have return successors, (1035), 1006 states have call predecessors, (1035), 1035 states have call successors, (1035) [2022-03-19 10:50:50,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2420 states to 2420 states and 3648 transitions. [2022-03-19 10:50:50,232 INFO L78 Accepts]: Start accepts. Automaton has 2420 states and 3648 transitions. Word has length 163 [2022-03-19 10:50:50,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:50:50,232 INFO L478 AbstractCegarLoop]: Abstraction has 2420 states and 3648 transitions. [2022-03-19 10:50:50,232 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 6 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2022-03-19 10:50:50,232 INFO L276 IsEmpty]: Start isEmpty. Operand 2420 states and 3648 transitions. [2022-03-19 10:50:50,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-03-19 10:50:50,234 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:50:50,234 INFO L500 BasicCegarLoop]: trace histogram [22, 21, 21, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:50:50,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-19 10:50:50,451 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:50:50,451 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:50:50,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:50:50,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1838514956, now seen corresponding path program 13 times [2022-03-19 10:50:50,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:50:50,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1113143402] [2022-03-19 10:50:50,452 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:50:50,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1838514956, now seen corresponding path program 14 times [2022-03-19 10:50:50,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:50:50,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698641716] [2022-03-19 10:50:50,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:50:50,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:50:50,457 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:50:50,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1957468818] [2022-03-19 10:50:50,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:50:50,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:50:50,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:50:50,459 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:50:50,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-19 10:50:50,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:50:50,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:50:50,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-19 10:50:50,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:50:51,004 INFO L134 CoverageAnalysis]: Checked inductivity of 996 backedges. 146 proven. 71 refuted. 0 times theorem prover too weak. 779 trivial. 0 not checked. [2022-03-19 10:50:51,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:51:21,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:51:21,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698641716] [2022-03-19 10:51:21,840 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:51:21,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957468818] [2022-03-19 10:51:21,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957468818] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 10:51:21,840 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 10:51:21,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-03-19 10:51:21,840 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:51:21,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1113143402] [2022-03-19 10:51:21,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1113143402] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:51:21,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:51:21,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 10:51:21,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887942509] [2022-03-19 10:51:21,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:51:21,841 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 10:51:21,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:51:21,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 10:51:21,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-03-19 10:51:21,841 INFO L87 Difference]: Start difference. First operand 2420 states and 3648 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 8 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-03-19 10:51:23,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:51:23,838 INFO L93 Difference]: Finished difference Result 2773 states and 4182 transitions. [2022-03-19 10:51:23,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 10:51:23,840 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 8 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 163 [2022-03-19 10:51:23,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:51:23,859 INFO L225 Difference]: With dead ends: 2773 [2022-03-19 10:51:23,859 INFO L226 Difference]: Without dead ends: 2432 [2022-03-19 10:51:23,862 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=187, Invalid=869, Unknown=0, NotChecked=0, Total=1056 [2022-03-19 10:51:23,862 INFO L912 BasicCegarLoop]: 82 mSDtfsCounter, 64 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 10:51:23,862 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 703 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 10:51:23,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2432 states. [2022-03-19 10:51:25,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2432 to 2429. [2022-03-19 10:51:25,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2429 states, 1300 states have (on average 1.216923076923077) internal successors, (1582), 1330 states have internal predecessors, (1582), 1041 states have call successors, (1041), 88 states have call predecessors, (1041), 87 states have return successors, (1039), 1010 states have call predecessors, (1039), 1039 states have call successors, (1039) [2022-03-19 10:51:25,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2429 states to 2429 states and 3662 transitions. [2022-03-19 10:51:25,102 INFO L78 Accepts]: Start accepts. Automaton has 2429 states and 3662 transitions. Word has length 163 [2022-03-19 10:51:25,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:51:25,102 INFO L478 AbstractCegarLoop]: Abstraction has 2429 states and 3662 transitions. [2022-03-19 10:51:25,102 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 8 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-03-19 10:51:25,102 INFO L276 IsEmpty]: Start isEmpty. Operand 2429 states and 3662 transitions. [2022-03-19 10:51:25,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-03-19 10:51:25,104 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:51:25,104 INFO L500 BasicCegarLoop]: trace histogram [23, 22, 22, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:51:25,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-19 10:51:25,321 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-03-19 10:51:25,321 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:51:25,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:51:25,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1828996488, now seen corresponding path program 15 times [2022-03-19 10:51:25,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:51:25,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [163123205] [2022-03-19 10:51:25,322 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:51:25,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1828996488, now seen corresponding path program 16 times [2022-03-19 10:51:25,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:51:25,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061897778] [2022-03-19 10:51:25,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:51:25,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:51:25,327 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:51:25,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [183458855] [2022-03-19 10:51:25,327 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:51:25,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:51:25,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:51:25,328 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:51:25,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-19 10:51:25,385 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:51:25,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:51:25,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-19 10:51:25,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:51:25,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 233 proven. 64 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2022-03-19 10:51:25,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:51:26,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 67 proven. 74 refuted. 0 times theorem prover too weak. 939 trivial. 0 not checked. [2022-03-19 10:51:26,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:51:26,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061897778] [2022-03-19 10:51:26,548 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:51:26,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183458855] [2022-03-19 10:51:26,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183458855] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:51:26,548 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:51:26,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 25 [2022-03-19 10:51:26,549 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:51:26,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [163123205] [2022-03-19 10:51:26,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [163123205] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:51:26,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:51:26,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 10:51:26,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353219237] [2022-03-19 10:51:26,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:51:26,549 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 10:51:26,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:51:26,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 10:51:26,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2022-03-19 10:51:26,550 INFO L87 Difference]: Start difference. First operand 2429 states and 3662 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 8 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2022-03-19 10:51:28,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:51:28,342 INFO L93 Difference]: Finished difference Result 3393 states and 5126 transitions. [2022-03-19 10:51:28,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 10:51:28,344 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 8 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) Word has length 165 [2022-03-19 10:51:28,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:51:28,351 INFO L225 Difference]: With dead ends: 3393 [2022-03-19 10:51:28,351 INFO L226 Difference]: Without dead ends: 2187 [2022-03-19 10:51:28,354 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=232, Invalid=958, Unknown=0, NotChecked=0, Total=1190 [2022-03-19 10:51:28,354 INFO L912 BasicCegarLoop]: 84 mSDtfsCounter, 44 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 10:51:28,354 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 593 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 10:51:28,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2187 states. [2022-03-19 10:51:29,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2187 to 2177. [2022-03-19 10:51:29,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2177 states, 1216 states have (on average 1.1973684210526316) internal successors, (1456), 1246 states have internal predecessors, (1456), 873 states have call successors, (873), 88 states have call predecessors, (873), 87 states have return successors, (871), 842 states have call predecessors, (871), 871 states have call successors, (871) [2022-03-19 10:51:29,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2177 states to 2177 states and 3200 transitions. [2022-03-19 10:51:29,466 INFO L78 Accepts]: Start accepts. Automaton has 2177 states and 3200 transitions. Word has length 165 [2022-03-19 10:51:29,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:51:29,467 INFO L478 AbstractCegarLoop]: Abstraction has 2177 states and 3200 transitions. [2022-03-19 10:51:29,467 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 8 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2022-03-19 10:51:29,467 INFO L276 IsEmpty]: Start isEmpty. Operand 2177 states and 3200 transitions. [2022-03-19 10:51:29,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-03-19 10:51:29,469 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:51:29,469 INFO L500 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:51:29,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-19 10:51:29,683 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-03-19 10:51:29,685 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:51:29,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:51:29,685 INFO L85 PathProgramCache]: Analyzing trace with hash 984689660, now seen corresponding path program 49 times [2022-03-19 10:51:29,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:51:29,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1003959637] [2022-03-19 10:51:29,689 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:51:29,689 INFO L85 PathProgramCache]: Analyzing trace with hash 984689660, now seen corresponding path program 50 times [2022-03-19 10:51:29,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:51:29,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638203042] [2022-03-19 10:51:29,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:51:29,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:51:29,694 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:51:29,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1529276848] [2022-03-19 10:51:29,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:51:29,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:51:29,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:51:29,696 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:51:29,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-19 10:51:29,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:51:29,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:51:29,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-19 10:51:29,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:51:30,442 INFO L134 CoverageAnalysis]: Checked inductivity of 914 backedges. 55 proven. 82 refuted. 0 times theorem prover too weak. 777 trivial. 0 not checked. [2022-03-19 10:51:30,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:51:31,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:51:31,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638203042] [2022-03-19 10:51:31,493 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:51:31,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529276848] [2022-03-19 10:51:31,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529276848] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 10:51:31,493 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 10:51:31,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-03-19 10:51:31,493 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:51:31,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1003959637] [2022-03-19 10:51:31,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1003959637] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:51:31,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:51:31,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 10:51:31,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61652217] [2022-03-19 10:51:31,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:51:31,494 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 10:51:31,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:51:31,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 10:51:31,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2022-03-19 10:51:31,495 INFO L87 Difference]: Start difference. First operand 2177 states and 3200 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 8 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-03-19 10:51:33,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:51:33,475 INFO L93 Difference]: Finished difference Result 2403 states and 3527 transitions. [2022-03-19 10:51:33,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-19 10:51:33,476 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 8 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) Word has length 163 [2022-03-19 10:51:33,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:51:33,481 INFO L225 Difference]: With dead ends: 2403 [2022-03-19 10:51:33,481 INFO L226 Difference]: Without dead ends: 2275 [2022-03-19 10:51:33,482 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=216, Invalid=1266, Unknown=0, NotChecked=0, Total=1482 [2022-03-19 10:51:33,482 INFO L912 BasicCegarLoop]: 93 mSDtfsCounter, 74 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 823 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 10:51:33,482 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 823 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 418 Invalid, 0 Unknown, 76 Unchecked, 0.5s Time] [2022-03-19 10:51:33,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2275 states. [2022-03-19 10:51:34,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2275 to 2177. [2022-03-19 10:51:34,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2177 states, 1216 states have (on average 1.196546052631579) internal successors, (1455), 1246 states have internal predecessors, (1455), 873 states have call successors, (873), 88 states have call predecessors, (873), 87 states have return successors, (871), 842 states have call predecessors, (871), 871 states have call successors, (871) [2022-03-19 10:51:34,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2177 states to 2177 states and 3199 transitions. [2022-03-19 10:51:34,588 INFO L78 Accepts]: Start accepts. Automaton has 2177 states and 3199 transitions. Word has length 163 [2022-03-19 10:51:34,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:51:34,589 INFO L478 AbstractCegarLoop]: Abstraction has 2177 states and 3199 transitions. [2022-03-19 10:51:34,589 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 8 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-03-19 10:51:34,589 INFO L276 IsEmpty]: Start isEmpty. Operand 2177 states and 3199 transitions. [2022-03-19 10:51:34,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-03-19 10:51:34,601 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:51:34,601 INFO L500 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:51:34,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-19 10:51:34,814 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-19 10:51:34,815 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:51:34,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:51:34,815 INFO L85 PathProgramCache]: Analyzing trace with hash 570501180, now seen corresponding path program 51 times [2022-03-19 10:51:34,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:51:34,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1167133774] [2022-03-19 10:51:34,815 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:51:34,816 INFO L85 PathProgramCache]: Analyzing trace with hash 570501180, now seen corresponding path program 52 times [2022-03-19 10:51:34,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:51:34,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424126402] [2022-03-19 10:51:34,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:51:34,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:51:34,820 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:51:34,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [947617460] [2022-03-19 10:51:34,821 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:51:34,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:51:34,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:51:34,822 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:51:34,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-19 10:51:34,875 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:51:34,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:51:34,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-19 10:51:34,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:51:35,437 INFO L134 CoverageAnalysis]: Checked inductivity of 914 backedges. 329 proven. 58 refuted. 0 times theorem prover too weak. 527 trivial. 0 not checked. [2022-03-19 10:51:35,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:51:36,231 INFO L134 CoverageAnalysis]: Checked inductivity of 914 backedges. 81 proven. 58 refuted. 0 times theorem prover too weak. 775 trivial. 0 not checked. [2022-03-19 10:51:36,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:51:36,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424126402] [2022-03-19 10:51:36,231 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:51:36,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947617460] [2022-03-19 10:51:36,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947617460] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:51:36,231 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:51:36,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2022-03-19 10:51:36,232 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:51:36,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1167133774] [2022-03-19 10:51:36,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1167133774] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:51:36,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:51:36,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 10:51:36,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355885141] [2022-03-19 10:51:36,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:51:36,232 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 10:51:36,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:51:36,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 10:51:36,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2022-03-19 10:51:36,233 INFO L87 Difference]: Start difference. First operand 2177 states and 3199 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 7 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-03-19 10:51:38,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:51:38,383 INFO L93 Difference]: Finished difference Result 2304 states and 3368 transitions. [2022-03-19 10:51:38,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-19 10:51:38,385 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 7 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) Word has length 163 [2022-03-19 10:51:38,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:51:38,389 INFO L225 Difference]: With dead ends: 2304 [2022-03-19 10:51:38,389 INFO L226 Difference]: Without dead ends: 2115 [2022-03-19 10:51:38,390 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=276, Invalid=1616, Unknown=0, NotChecked=0, Total=1892 [2022-03-19 10:51:38,390 INFO L912 BasicCegarLoop]: 86 mSDtfsCounter, 79 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 797 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 10:51:38,391 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 797 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 10:51:38,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2115 states.