/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 14:02:13,951 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 14:02:13,966 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 14:02:14,009 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 14:02:14,009 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 14:02:14,010 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 14:02:14,013 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 14:02:14,017 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 14:02:14,019 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 14:02:14,023 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 14:02:14,024 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 14:02:14,025 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 14:02:14,025 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 14:02:14,027 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 14:02:14,028 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 14:02:14,030 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 14:02:14,031 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 14:02:14,032 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 14:02:14,034 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 14:02:14,039 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 14:02:14,040 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 14:02:14,041 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 14:02:14,042 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 14:02:14,043 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 14:02:14,044 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 14:02:14,049 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-20 14:02:14,049 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-20 14:02:14,050 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-20 14:02:14,051 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-20 14:02:14,051 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-20 14:02:14,052 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-20 14:02:14,052 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-20 14:02:14,054 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-20 14:02:14,054 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-20 14:02:14,055 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-20 14:02:14,056 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-20 14:02:14,056 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-20 14:02:14,056 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-20 14:02:14,056 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-20 14:02:14,057 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 14:02:14,058 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 14:02:14,059 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 14:02:14,060 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-20 14:02:14,068 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 14:02:14,069 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 14:02:14,071 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 14:02:14,071 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 14:02:14,071 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 14:02:14,071 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 14:02:14,071 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 14:02:14,071 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 14:02:14,072 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 14:02:14,072 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 14:02:14,072 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 14:02:14,073 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 14:02:14,073 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 14:02:14,073 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 14:02:14,073 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 14:02:14,073 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 14:02:14,073 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 14:02:14,073 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 14:02:14,074 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 14:02:14,074 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 14:02:14,074 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 14:02:14,074 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 14:02:14,074 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 14:02:14,074 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 14:02:14,074 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-20 14:02:14,075 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 14:02:14,283 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 14:02:14,315 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 14:02:14,317 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 14:02:14,318 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 14:02:14,320 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 14:02:14,320 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound50.c [2022-03-20 14:02:14,372 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f5c7b89b/8e354e0493d84b60aae643bd6f917067/FLAGc11412f5f [2022-03-20 14:02:14,761 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 14:02:14,761 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound50.c [2022-03-20 14:02:14,766 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f5c7b89b/8e354e0493d84b60aae643bd6f917067/FLAGc11412f5f [2022-03-20 14:02:14,783 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f5c7b89b/8e354e0493d84b60aae643bd6f917067 [2022-03-20 14:02:14,785 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 14:02:14,787 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 14:02:14,790 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 14:02:14,790 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 14:02:14,793 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 14:02:14,794 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 02:02:14" (1/1) ... [2022-03-20 14:02:14,795 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75f45f62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:02:14, skipping insertion in model container [2022-03-20 14:02:14,795 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 02:02:14" (1/1) ... [2022-03-20 14:02:14,807 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 14:02:14,819 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 14:02:14,983 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/bresenham-ll_valuebound50.c[597,610] [2022-03-20 14:02:15,012 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 14:02:15,019 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 14:02:15,030 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/bresenham-ll_valuebound50.c[597,610] [2022-03-20 14:02:15,048 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 14:02:15,059 INFO L208 MainTranslator]: Completed translation [2022-03-20 14:02:15,061 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:02:15 WrapperNode [2022-03-20 14:02:15,061 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 14:02:15,063 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 14:02:15,064 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 14:02:15,064 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 14:02:15,073 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:02:15" (1/1) ... [2022-03-20 14:02:15,073 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:02:15" (1/1) ... [2022-03-20 14:02:15,079 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:02:15" (1/1) ... [2022-03-20 14:02:15,080 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:02:15" (1/1) ... [2022-03-20 14:02:15,090 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:02:15" (1/1) ... [2022-03-20 14:02:15,094 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:02:15" (1/1) ... [2022-03-20 14:02:15,098 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:02:15" (1/1) ... [2022-03-20 14:02:15,101 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 14:02:15,102 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 14:02:15,102 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 14:02:15,102 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 14:02:15,103 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:02:15" (1/1) ... [2022-03-20 14:02:15,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 14:02:15,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:02:15,132 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 14:02:15,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 14:02:15,178 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 14:02:15,179 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 14:02:15,179 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 14:02:15,179 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 14:02:15,179 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 14:02:15,179 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 14:02:15,179 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 14:02:15,179 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 14:02:15,180 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 14:02:15,180 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 14:02:15,180 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 14:02:15,181 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 14:02:15,181 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 14:02:15,181 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 14:02:15,181 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 14:02:15,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 14:02:15,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 14:02:15,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 14:02:15,182 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 14:02:15,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 14:02:15,240 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 14:02:15,241 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 14:02:15,358 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 14:02:15,363 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 14:02:15,363 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 14:02:15,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 02:02:15 BoogieIcfgContainer [2022-03-20 14:02:15,365 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 14:02:15,366 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 14:02:15,366 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 14:02:15,383 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 14:02:15,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 02:02:14" (1/3) ... [2022-03-20 14:02:15,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79d0cf7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 02:02:15, skipping insertion in model container [2022-03-20 14:02:15,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:02:15" (2/3) ... [2022-03-20 14:02:15,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79d0cf7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 02:02:15, skipping insertion in model container [2022-03-20 14:02:15,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 02:02:15" (3/3) ... [2022-03-20 14:02:15,386 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_valuebound50.c [2022-03-20 14:02:15,390 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 14:02:15,390 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 14:02:15,431 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 14:02:15,436 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 14:02:15,436 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 14:02:15,447 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 14:02:15,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 14:02:15,453 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:02:15,453 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:02:15,453 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:02:15,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:02:15,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1867489771, now seen corresponding path program 1 times [2022-03-20 14:02:15,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:02:15,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1381579656] [2022-03-20 14:02:15,472 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:02:15,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1867489771, now seen corresponding path program 2 times [2022-03-20 14:02:15,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:02:15,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698480649] [2022-03-20 14:02:15,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:02:15,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:02:15,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:02:15,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 14:02:15,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:02:15,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 14:02:15,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:02:15,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 14:02:15,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:02:15,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 14:02:15,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:02:15,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698480649] [2022-03-20 14:02:15,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698480649] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:02:15,691 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:02:15,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 14:02:15,693 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:02:15,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1381579656] [2022-03-20 14:02:15,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1381579656] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:02:15,694 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:02:15,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 14:02:15,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167451528] [2022-03-20 14:02:15,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:02:15,703 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 14:02:15,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:02:15,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 14:02:15,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 14:02:15,724 INFO L87 Difference]: Start difference. First operand has 32 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 14:02:15,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:02:15,766 INFO L93 Difference]: Finished difference Result 57 states and 74 transitions. [2022-03-20 14:02:15,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 14:02:15,768 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-03-20 14:02:15,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:02:15,774 INFO L225 Difference]: With dead ends: 57 [2022-03-20 14:02:15,774 INFO L226 Difference]: Without dead ends: 27 [2022-03-20 14:02:15,776 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 14:02:15,784 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 14:02:15,786 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 34 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 14:02:15,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-20 14:02:15,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-03-20 14:02:15,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 14:02:15,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-03-20 14:02:15,817 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 23 [2022-03-20 14:02:15,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:02:15,817 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-03-20 14:02:15,817 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 14:02:15,817 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-03-20 14:02:15,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 14:02:15,819 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:02:15,819 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:02:15,819 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 14:02:15,819 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:02:15,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:02:15,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1827672217, now seen corresponding path program 1 times [2022-03-20 14:02:15,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:02:15,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1032118470] [2022-03-20 14:02:15,821 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:02:15,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1827672217, now seen corresponding path program 2 times [2022-03-20 14:02:15,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:02:15,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404295072] [2022-03-20 14:02:15,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:02:15,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:02:15,838 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:02:15,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1997017537] [2022-03-20 14:02:15,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:02:15,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:02:15,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:02:15,840 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:02:15,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 14:02:15,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 14:02:15,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:02:15,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 14:02:15,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:02:16,101 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 14:02:16,101 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 14:02:16,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:02:16,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404295072] [2022-03-20 14:02:16,102 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:02:16,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997017537] [2022-03-20 14:02:16,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997017537] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:02:16,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:02:16,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 14:02:16,104 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:02:16,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1032118470] [2022-03-20 14:02:16,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1032118470] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:02:16,104 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:02:16,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 14:02:16,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99487372] [2022-03-20 14:02:16,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:02:16,105 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 14:02:16,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:02:16,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 14:02:16,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 14:02:16,107 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 14:02:16,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:02:16,178 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-03-20 14:02:16,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 14:02:16,179 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2022-03-20 14:02:16,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:02:16,181 INFO L225 Difference]: With dead ends: 39 [2022-03-20 14:02:16,181 INFO L226 Difference]: Without dead ends: 35 [2022-03-20 14:02:16,181 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-20 14:02:16,182 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 10 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 14:02:16,183 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 101 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 14:02:16,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-20 14:02:16,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2022-03-20 14:02:16,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 14:02:16,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2022-03-20 14:02:16,194 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 23 [2022-03-20 14:02:16,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:02:16,195 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2022-03-20 14:02:16,195 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 14:02:16,195 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2022-03-20 14:02:16,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 14:02:16,196 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:02:16,196 INFO L499 BasicCegarLoop]: trace histogram [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] [2022-03-20 14:02:16,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 14:02:16,419 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 [2022-03-20 14:02:16,420 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:02:16,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:02:16,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1419291471, now seen corresponding path program 1 times [2022-03-20 14:02:16,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:02:16,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2069128167] [2022-03-20 14:02:16,422 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:02:16,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1419291471, now seen corresponding path program 2 times [2022-03-20 14:02:16,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:02:16,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113441686] [2022-03-20 14:02:16,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:02:16,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:02:16,440 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:02:16,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1988673611] [2022-03-20 14:02:16,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:02:16,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:02:16,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:02:16,449 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:02:16,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 14:02:16,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:02:16,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:02:16,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-20 14:02:16,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:02:16,820 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 14:02:16,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:02:16,980 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-20 14:02:16,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:02:16,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113441686] [2022-03-20 14:02:16,981 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:02:16,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988673611] [2022-03-20 14:02:16,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988673611] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:02:16,982 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:02:16,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 14 [2022-03-20 14:02:16,982 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:02:16,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2069128167] [2022-03-20 14:02:16,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2069128167] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:02:16,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:02:16,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 14:02:16,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378499476] [2022-03-20 14:02:16,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:02:16,984 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 14:02:16,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:02:16,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 14:02:16,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-03-20 14:02:16,985 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 14:02:17,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:02:17,142 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2022-03-20 14:02:17,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 14:02:17,142 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2022-03-20 14:02:17,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:02:17,144 INFO L225 Difference]: With dead ends: 48 [2022-03-20 14:02:17,144 INFO L226 Difference]: Without dead ends: 44 [2022-03-20 14:02:17,144 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-03-20 14:02:17,145 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 25 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 14:02:17,146 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 129 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 14:02:17,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-20 14:02:17,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2022-03-20 14:02:17,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 14:02:17,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2022-03-20 14:02:17,157 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 32 [2022-03-20 14:02:17,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:02:17,157 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2022-03-20 14:02:17,157 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 14:02:17,158 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2022-03-20 14:02:17,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 14:02:17,158 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:02:17,159 INFO L499 BasicCegarLoop]: trace histogram [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] [2022-03-20 14:02:17,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 14:02:17,381 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 [2022-03-20 14:02:17,382 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:02:17,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:02:17,382 INFO L85 PathProgramCache]: Analyzing trace with hash 355715891, now seen corresponding path program 1 times [2022-03-20 14:02:17,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:02:17,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [540019967] [2022-03-20 14:02:17,383 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:02:17,383 INFO L85 PathProgramCache]: Analyzing trace with hash 355715891, now seen corresponding path program 2 times [2022-03-20 14:02:17,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:02:17,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346498661] [2022-03-20 14:02:17,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:02:17,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:02:17,397 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:02:17,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1495504268] [2022-03-20 14:02:17,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:02:17,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:02:17,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:02:17,412 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:02:17,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 14:02:17,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:02:17,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:02:17,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-20 14:02:17,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:02:17,634 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 14:02:17,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:02:17,781 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 14:02:17,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:02:17,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346498661] [2022-03-20 14:02:17,782 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:02:17,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495504268] [2022-03-20 14:02:17,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495504268] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:02:17,782 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:02:17,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2022-03-20 14:02:17,783 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:02:17,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [540019967] [2022-03-20 14:02:17,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [540019967] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:02:17,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:02:17,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 14:02:17,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635763694] [2022-03-20 14:02:17,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:02:17,784 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 14:02:17,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:02:17,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 14:02:17,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-03-20 14:02:17,785 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 14:02:17,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:02:17,898 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2022-03-20 14:02:17,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 14:02:17,898 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2022-03-20 14:02:17,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:02:17,904 INFO L225 Difference]: With dead ends: 56 [2022-03-20 14:02:17,904 INFO L226 Difference]: Without dead ends: 54 [2022-03-20 14:02:17,905 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-03-20 14:02:17,910 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 11 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 14:02:17,911 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 183 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 14:02:17,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-20 14:02:17,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2022-03-20 14:02:17,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 36 states have internal predecessors, (38), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 14:02:17,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2022-03-20 14:02:17,928 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 32 [2022-03-20 14:02:17,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:02:17,929 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2022-03-20 14:02:17,929 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 14:02:17,929 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2022-03-20 14:02:17,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-20 14:02:17,930 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:02:17,930 INFO L499 BasicCegarLoop]: trace histogram [3, 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] [2022-03-20 14:02:17,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 14:02:18,130 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 [2022-03-20 14:02:18,131 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:02:18,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:02:18,132 INFO L85 PathProgramCache]: Analyzing trace with hash 125050924, now seen corresponding path program 1 times [2022-03-20 14:02:18,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:02:18,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [934035579] [2022-03-20 14:02:18,132 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:02:18,132 INFO L85 PathProgramCache]: Analyzing trace with hash 125050924, now seen corresponding path program 2 times [2022-03-20 14:02:18,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:02:18,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788131565] [2022-03-20 14:02:18,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:02:18,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:02:18,143 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:02:18,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1528500052] [2022-03-20 14:02:18,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:02:18,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:02:18,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:02:18,145 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:02:18,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 14:02:18,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:02:18,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:02:18,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-20 14:02:18,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:02:18,504 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-20 14:02:18,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:02:18,892 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-20 14:02:18,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:02:18,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788131565] [2022-03-20 14:02:18,892 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:02:18,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528500052] [2022-03-20 14:02:18,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528500052] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:02:18,893 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:02:18,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2022-03-20 14:02:18,893 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:02:18,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [934035579] [2022-03-20 14:02:18,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [934035579] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:02:18,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:02:18,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 14:02:18,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585367983] [2022-03-20 14:02:18,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:02:18,894 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 14:02:18,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:02:18,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 14:02:18,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-03-20 14:02:18,897 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 14 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 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) [2022-03-20 14:02:19,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:02:19,127 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2022-03-20 14:02:19,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 14:02:19,127 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 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 39 [2022-03-20 14:02:19,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:02:19,128 INFO L225 Difference]: With dead ends: 61 [2022-03-20 14:02:19,128 INFO L226 Difference]: Without dead ends: 53 [2022-03-20 14:02:19,129 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2022-03-20 14:02:19,130 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 18 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 14:02:19,130 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 217 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 14:02:19,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-03-20 14:02:19,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 43. [2022-03-20 14:02:19,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 14:02:19,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2022-03-20 14:02:19,139 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 39 [2022-03-20 14:02:19,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:02:19,139 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2022-03-20 14:02:19,139 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 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) [2022-03-20 14:02:19,140 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2022-03-20 14:02:19,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-20 14:02:19,140 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:02:19,141 INFO L499 BasicCegarLoop]: trace histogram [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] [2022-03-20 14:02:19,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 14:02:19,365 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 [2022-03-20 14:02:19,365 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:02:19,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:02:19,366 INFO L85 PathProgramCache]: Analyzing trace with hash 733948825, now seen corresponding path program 3 times [2022-03-20 14:02:19,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:02:19,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1448767800] [2022-03-20 14:02:19,367 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:02:19,367 INFO L85 PathProgramCache]: Analyzing trace with hash 733948825, now seen corresponding path program 4 times [2022-03-20 14:02:19,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:02:19,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909800340] [2022-03-20 14:02:19,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:02:19,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:02:19,377 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:02:19,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1378399590] [2022-03-20 14:02:19,378 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 14:02:19,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:02:19,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:02:19,379 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:02:19,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 14:02:19,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 14:02:19,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:02:19,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-20 14:02:19,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:02:19,651 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 14:02:19,747 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-20 14:02:19,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:02:19,982 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-20 14:02:19,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:02:19,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909800340] [2022-03-20 14:02:19,982 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:02:19,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378399590] [2022-03-20 14:02:19,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378399590] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:02:19,982 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:02:19,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 18 [2022-03-20 14:02:19,983 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:02:19,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1448767800] [2022-03-20 14:02:19,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1448767800] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:02:19,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:02:19,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 14:02:19,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757389202] [2022-03-20 14:02:19,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:02:19,984 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 14:02:19,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:02:19,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 14:02:19,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-03-20 14:02:19,985 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 12 states have internal predecessors, (23), 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) [2022-03-20 14:02:20,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:02:20,337 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2022-03-20 14:02:20,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 14:02:20,337 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 12 states have internal predecessors, (23), 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 41 [2022-03-20 14:02:20,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:02:20,338 INFO L225 Difference]: With dead ends: 61 [2022-03-20 14:02:20,338 INFO L226 Difference]: Without dead ends: 57 [2022-03-20 14:02:20,339 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-03-20 14:02:20,339 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 17 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 14:02:20,340 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 240 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 14:02:20,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-03-20 14:02:20,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2022-03-20 14:02:20,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 38 states have (on average 1.131578947368421) internal successors, (43), 40 states have internal predecessors, (43), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 14:02:20,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2022-03-20 14:02:20,352 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 41 [2022-03-20 14:02:20,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:02:20,352 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2022-03-20 14:02:20,353 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 12 states have internal predecessors, (23), 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) [2022-03-20 14:02:20,353 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2022-03-20 14:02:20,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-20 14:02:20,354 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:02:20,354 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:02:20,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 14:02:20,579 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 [2022-03-20 14:02:20,580 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:02:20,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:02:20,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1786011109, now seen corresponding path program 1 times [2022-03-20 14:02:20,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:02:20,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2516767] [2022-03-20 14:02:20,581 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:02:20,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1786011109, now seen corresponding path program 2 times [2022-03-20 14:02:20,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:02:20,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575988664] [2022-03-20 14:02:20,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:02:20,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:02:20,590 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:02:20,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [753888376] [2022-03-20 14:02:20,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:02:20,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:02:20,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:02:20,592 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:02:20,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 14:02:20,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:02:20,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:02:20,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-20 14:02:20,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:02:20,899 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-20 14:02:20,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:02:21,129 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-20 14:02:21,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:02:21,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575988664] [2022-03-20 14:02:21,129 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:02:21,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753888376] [2022-03-20 14:02:21,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753888376] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:02:21,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:02:21,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 18 [2022-03-20 14:02:21,130 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:02:21,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2516767] [2022-03-20 14:02:21,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2516767] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:02:21,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:02:21,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 14:02:21,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416237329] [2022-03-20 14:02:21,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:02:21,131 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 14:02:21,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:02:21,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 14:02:21,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2022-03-20 14:02:21,132 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand has 13 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 states have internal predecessors, (26), 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) [2022-03-20 14:02:21,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:02:21,329 INFO L93 Difference]: Finished difference Result 72 states and 79 transitions. [2022-03-20 14:02:21,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 14:02:21,329 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 states have internal predecessors, (26), 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 41 [2022-03-20 14:02:21,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:02:21,331 INFO L225 Difference]: With dead ends: 72 [2022-03-20 14:02:21,331 INFO L226 Difference]: Without dead ends: 70 [2022-03-20 14:02:21,332 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-03-20 14:02:21,332 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 16 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 14:02:21,333 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 232 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 14:02:21,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-20 14:02:21,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 59. [2022-03-20 14:02:21,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 43 states have internal predecessors, (46), 10 states have call successors, (10), 8 states have call predecessors, (10), 7 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 14:02:21,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2022-03-20 14:02:21,344 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 41 [2022-03-20 14:02:21,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:02:21,345 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2022-03-20 14:02:21,345 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 states have internal predecessors, (26), 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) [2022-03-20 14:02:21,345 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2022-03-20 14:02:21,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-20 14:02:21,346 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:02:21,346 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:02:21,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 14:02:21,563 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 [2022-03-20 14:02:21,564 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:02:21,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:02:21,564 INFO L85 PathProgramCache]: Analyzing trace with hash -287119529, now seen corresponding path program 3 times [2022-03-20 14:02:21,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:02:21,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [120226609] [2022-03-20 14:02:21,565 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:02:21,565 INFO L85 PathProgramCache]: Analyzing trace with hash -287119529, now seen corresponding path program 4 times [2022-03-20 14:02:21,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:02:21,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569381129] [2022-03-20 14:02:21,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:02:21,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:02:21,586 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:02:21,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1551208878] [2022-03-20 14:02:21,587 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 14:02:21,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:02:21,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:02:21,592 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) [2022-03-20 14:02:21,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 14:02:21,646 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 14:02:21,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:02:21,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-20 14:02:21,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:02:21,952 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 14:02:21,955 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 14:02:22,670 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-20 14:02:22,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:02:23,251 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-20 14:02:23,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:02:23,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569381129] [2022-03-20 14:02:23,252 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:02:23,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551208878] [2022-03-20 14:02:23,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551208878] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:02:23,252 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:02:23,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 20 [2022-03-20 14:02:23,253 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:02:23,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [120226609] [2022-03-20 14:02:23,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [120226609] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:02:23,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:02:23,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 14:02:23,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936717609] [2022-03-20 14:02:23,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:02:23,253 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 14:02:23,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:02:23,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 14:02:23,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-03-20 14:02:23,254 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand has 14 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 13 states have internal predecessors, (23), 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) [2022-03-20 14:02:25,314 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 [] [2022-03-20 14:02:27,458 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 14:02:29,508 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 14:02:31,572 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 14:02:33,668 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 14:02:33,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:02:33,827 INFO L93 Difference]: Finished difference Result 86 states and 98 transitions. [2022-03-20 14:02:33,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 14:02:33,827 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 13 states have internal predecessors, (23), 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 41 [2022-03-20 14:02:33,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:02:33,828 INFO L225 Difference]: With dead ends: 86 [2022-03-20 14:02:33,828 INFO L226 Difference]: Without dead ends: 73 [2022-03-20 14:02:33,829 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2022-03-20 14:02:33,829 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 15 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 8 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2022-03-20 14:02:33,830 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 208 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 230 Invalid, 5 Unknown, 0 Unchecked, 10.3s Time] [2022-03-20 14:02:33,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-03-20 14:02:33,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-03-20 14:02:33,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 54 states have internal predecessors, (58), 12 states have call successors, (12), 9 states have call predecessors, (12), 8 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 14:02:33,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 80 transitions. [2022-03-20 14:02:33,854 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 80 transitions. Word has length 41 [2022-03-20 14:02:33,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:02:33,855 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 80 transitions. [2022-03-20 14:02:33,855 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 13 states have internal predecessors, (23), 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) [2022-03-20 14:02:33,855 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 80 transitions. [2022-03-20 14:02:33,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-20 14:02:33,856 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:02:33,856 INFO L499 BasicCegarLoop]: trace histogram [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] [2022-03-20 14:02:33,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 14:02:34,060 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 [2022-03-20 14:02:34,061 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:02:34,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:02:34,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1487887833, now seen corresponding path program 3 times [2022-03-20 14:02:34,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:02:34,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1943007595] [2022-03-20 14:02:34,062 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:02:34,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1487887833, now seen corresponding path program 4 times [2022-03-20 14:02:34,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:02:34,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779686523] [2022-03-20 14:02:34,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:02:34,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:02:34,083 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:02:34,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1721802934] [2022-03-20 14:02:34,084 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 14:02:34,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:02:34,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:02:34,086 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) [2022-03-20 14:02:34,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 14:02:34,143 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 14:02:34,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:02:34,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 14:02:34,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:02:34,386 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-20 14:02:34,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:02:34,680 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-20 14:02:34,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:02:34,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779686523] [2022-03-20 14:02:34,681 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:02:34,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721802934] [2022-03-20 14:02:34,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721802934] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:02:34,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:02:34,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2022-03-20 14:02:34,681 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:02:34,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1943007595] [2022-03-20 14:02:34,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1943007595] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:02:34,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:02:34,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 14:02:34,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690349490] [2022-03-20 14:02:34,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:02:34,682 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 14:02:34,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:02:34,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 14:02:34,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-03-20 14:02:34,683 INFO L87 Difference]: Start difference. First operand 73 states and 80 transitions. Second operand has 11 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-20 14:02:34,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:02:34,888 INFO L93 Difference]: Finished difference Result 86 states and 95 transitions. [2022-03-20 14:02:34,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 14:02:34,888 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 41 [2022-03-20 14:02:34,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:02:34,889 INFO L225 Difference]: With dead ends: 86 [2022-03-20 14:02:34,889 INFO L226 Difference]: Without dead ends: 84 [2022-03-20 14:02:34,890 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-03-20 14:02:34,890 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 11 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 14:02:34,891 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 254 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 14:02:34,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-03-20 14:02:34,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 73. [2022-03-20 14:02:34,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 54 states have internal predecessors, (58), 12 states have call successors, (12), 9 states have call predecessors, (12), 8 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 14:02:34,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 80 transitions. [2022-03-20 14:02:34,906 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 80 transitions. Word has length 41 [2022-03-20 14:02:34,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:02:34,906 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 80 transitions. [2022-03-20 14:02:34,906 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-20 14:02:34,906 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 80 transitions. [2022-03-20 14:02:34,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-20 14:02:34,907 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:02:34,907 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:02:34,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 14:02:35,111 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 [2022-03-20 14:02:35,112 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:02:35,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:02:35,112 INFO L85 PathProgramCache]: Analyzing trace with hash 651179076, now seen corresponding path program 1 times [2022-03-20 14:02:35,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:02:35,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [18858601] [2022-03-20 14:02:35,113 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:02:35,113 INFO L85 PathProgramCache]: Analyzing trace with hash 651179076, now seen corresponding path program 2 times [2022-03-20 14:02:35,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:02:35,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075281269] [2022-03-20 14:02:35,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:02:35,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:02:35,123 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:02:35,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [910199848] [2022-03-20 14:02:35,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:02:35,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:02:35,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:02:35,131 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) [2022-03-20 14:02:35,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 14:02:35,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:02:35,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:02:35,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-20 14:02:35,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:02:35,354 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 14:02:35,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:02:35,521 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 14:02:35,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:02:35,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075281269] [2022-03-20 14:02:35,521 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:02:35,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910199848] [2022-03-20 14:02:35,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910199848] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:02:35,521 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:02:35,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-03-20 14:02:35,522 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:02:35,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [18858601] [2022-03-20 14:02:35,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [18858601] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:02:35,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:02:35,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 14:02:35,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175332145] [2022-03-20 14:02:35,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:02:35,522 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 14:02:35,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:02:35,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 14:02:35,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-03-20 14:02:35,523 INFO L87 Difference]: Start difference. First operand 73 states and 80 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-20 14:02:35,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:02:35,614 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2022-03-20 14:02:35,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 14:02:35,614 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 48 [2022-03-20 14:02:35,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:02:35,615 INFO L225 Difference]: With dead ends: 87 [2022-03-20 14:02:35,615 INFO L226 Difference]: Without dead ends: 79 [2022-03-20 14:02:35,616 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-03-20 14:02:35,617 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 3 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 14:02:35,617 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 146 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 14:02:35,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-20 14:02:35,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 76. [2022-03-20 14:02:35,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 54 states have (on average 1.1111111111111112) internal successors, (60), 57 states have internal predecessors, (60), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 14:02:35,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 84 transitions. [2022-03-20 14:02:35,664 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 84 transitions. Word has length 48 [2022-03-20 14:02:35,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:02:35,664 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 84 transitions. [2022-03-20 14:02:35,664 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-20 14:02:35,664 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 84 transitions. [2022-03-20 14:02:35,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-20 14:02:35,669 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:02:35,669 INFO L499 BasicCegarLoop]: trace histogram [4, 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] [2022-03-20 14:02:35,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 14:02:35,883 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 [2022-03-20 14:02:35,883 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:02:35,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:02:35,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1154259258, now seen corresponding path program 3 times [2022-03-20 14:02:35,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:02:35,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1158956384] [2022-03-20 14:02:35,884 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:02:35,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1154259258, now seen corresponding path program 4 times [2022-03-20 14:02:35,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:02:35,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834832503] [2022-03-20 14:02:35,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:02:35,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:02:35,893 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:02:35,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1161913669] [2022-03-20 14:02:35,893 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 14:02:35,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:02:35,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:02:35,899 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) [2022-03-20 14:02:35,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 14:02:35,946 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 14:02:35,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:02:35,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-20 14:02:35,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:02:36,309 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 14:02:36,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:02:36,659 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-03-20 14:02:36,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:02:36,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834832503] [2022-03-20 14:02:36,660 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:02:36,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161913669] [2022-03-20 14:02:36,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161913669] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:02:36,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:02:36,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2022-03-20 14:02:36,661 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:02:36,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1158956384] [2022-03-20 14:02:36,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1158956384] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:02:36,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:02:36,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 14:02:36,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287347236] [2022-03-20 14:02:36,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:02:36,661 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 14:02:36,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:02:36,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 14:02:36,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-03-20 14:02:36,662 INFO L87 Difference]: Start difference. First operand 76 states and 84 transitions. Second operand has 16 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-20 14:02:36,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:02:36,970 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2022-03-20 14:02:36,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 14:02:36,971 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 48 [2022-03-20 14:02:36,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:02:36,971 INFO L225 Difference]: With dead ends: 87 [2022-03-20 14:02:36,972 INFO L226 Difference]: Without dead ends: 79 [2022-03-20 14:02:36,972 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2022-03-20 14:02:36,973 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 18 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 14:02:36,973 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 260 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 14:02:36,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-20 14:02:36,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 73. [2022-03-20 14:02:36,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 54 states have internal predecessors, (58), 12 states have call successors, (12), 9 states have call predecessors, (12), 8 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 14:02:36,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 80 transitions. [2022-03-20 14:02:36,989 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 80 transitions. Word has length 48 [2022-03-20 14:02:36,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:02:36,989 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 80 transitions. [2022-03-20 14:02:36,989 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-20 14:02:36,989 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 80 transitions. [2022-03-20 14:02:36,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-20 14:02:36,990 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:02:36,990 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:02:37,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 14:02:37,203 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 [2022-03-20 14:02:37,203 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:02:37,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:02:37,204 INFO L85 PathProgramCache]: Analyzing trace with hash -463038031, now seen corresponding path program 5 times [2022-03-20 14:02:37,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:02:37,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1578900589] [2022-03-20 14:02:37,205 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:02:37,205 INFO L85 PathProgramCache]: Analyzing trace with hash -463038031, now seen corresponding path program 6 times [2022-03-20 14:02:37,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:02:37,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065858309] [2022-03-20 14:02:37,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:02:37,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:02:37,216 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:02:37,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1919543847] [2022-03-20 14:02:37,216 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 14:02:37,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:02:37,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:02:37,217 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) [2022-03-20 14:02:37,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 14:02:37,256 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-20 14:02:37,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:02:37,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 50 conjunts are in the unsatisfiable core [2022-03-20 14:02:37,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:02:37,555 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 14:02:37,866 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 14:02:37,867 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 14:02:38,071 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 14:02:38,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:02:38,318 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-03-20 14:02:38,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:02:38,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065858309] [2022-03-20 14:02:38,318 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:02:38,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919543847] [2022-03-20 14:02:38,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919543847] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:02:38,318 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:02:38,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 10] total 26 [2022-03-20 14:02:38,318 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:02:38,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1578900589] [2022-03-20 14:02:38,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1578900589] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:02:38,319 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:02:38,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 14:02:38,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617347853] [2022-03-20 14:02:38,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:02:38,319 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 14:02:38,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:02:38,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 14:02:38,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2022-03-20 14:02:38,320 INFO L87 Difference]: Start difference. First operand 73 states and 80 transitions. Second operand has 21 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 19 states have internal predecessors, (33), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-20 14:02:38,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:02:38,867 INFO L93 Difference]: Finished difference Result 92 states and 101 transitions. [2022-03-20 14:02:38,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 14:02:38,867 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 19 states have internal predecessors, (33), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 50 [2022-03-20 14:02:38,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:02:38,868 INFO L225 Difference]: With dead ends: 92 [2022-03-20 14:02:38,868 INFO L226 Difference]: Without dead ends: 88 [2022-03-20 14:02:38,869 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=137, Invalid=919, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 14:02:38,870 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 35 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 14:02:38,870 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 178 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 14:02:38,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-03-20 14:02:38,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 79. [2022-03-20 14:02:38,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 57 states have (on average 1.1228070175438596) internal successors, (64), 58 states have internal predecessors, (64), 12 states have call successors, (12), 10 states have call predecessors, (12), 9 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 14:02:38,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 86 transitions. [2022-03-20 14:02:38,887 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 86 transitions. Word has length 50 [2022-03-20 14:02:38,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:02:38,887 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 86 transitions. [2022-03-20 14:02:38,887 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 19 states have internal predecessors, (33), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-20 14:02:38,888 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 86 transitions. [2022-03-20 14:02:38,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-20 14:02:38,888 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:02:38,888 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:02:38,908 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-03-20 14:02:39,103 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 [2022-03-20 14:02:39,103 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:02:39,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:02:39,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1311969331, now seen corresponding path program 5 times [2022-03-20 14:02:39,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:02:39,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [752487060] [2022-03-20 14:02:39,104 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:02:39,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1311969331, now seen corresponding path program 6 times [2022-03-20 14:02:39,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:02:39,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54729172] [2022-03-20 14:02:39,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:02:39,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:02:39,119 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:02:39,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1297827367] [2022-03-20 14:02:39,119 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 14:02:39,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:02:39,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:02:39,123 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) [2022-03-20 14:02:39,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 14:02:39,166 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-20 14:02:39,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:02:39,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-20 14:02:39,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:02:39,400 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 14:02:54,729 WARN L232 SmtUtils]: Spent 10.04s on a formula simplification that was a NOOP. DAG size: 50 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 14:02:59,145 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 14:03:01,633 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 23 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 14:03:01,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:03:02,271 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-03-20 14:03:02,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:03:02,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54729172] [2022-03-20 14:03:02,272 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:03:02,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297827367] [2022-03-20 14:03:02,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297827367] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:03:02,272 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:03:02,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11] total 24 [2022-03-20 14:03:02,272 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:03:02,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [752487060] [2022-03-20 14:03:02,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [752487060] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:03:02,273 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:03:02,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 14:03:02,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648899142] [2022-03-20 14:03:02,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:03:02,273 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 14:03:02,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:03:02,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 14:03:02,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=481, Unknown=1, NotChecked=0, Total=552 [2022-03-20 14:03:02,274 INFO L87 Difference]: Start difference. First operand 79 states and 86 transitions. Second operand has 18 states, 15 states have (on average 2.0) internal successors, (30), 17 states have internal predecessors, (30), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-20 14:03:04,146 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 14:03:06,158 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 14:03:10,211 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 [] [2022-03-20 14:03:11,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:03:11,179 INFO L93 Difference]: Finished difference Result 96 states and 105 transitions. [2022-03-20 14:03:11,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 14:03:11,180 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 2.0) internal successors, (30), 17 states have internal predecessors, (30), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 50 [2022-03-20 14:03:11,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:03:11,181 INFO L225 Difference]: With dead ends: 96 [2022-03-20 14:03:11,181 INFO L226 Difference]: Without dead ends: 88 [2022-03-20 14:03:11,181 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=100, Invalid=654, Unknown=2, NotChecked=0, Total=756 [2022-03-20 14:03:11,181 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 15 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-03-20 14:03:11,182 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 356 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 346 Invalid, 2 Unknown, 136 Unchecked, 6.3s Time] [2022-03-20 14:03:11,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-03-20 14:03:11,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 79. [2022-03-20 14:03:11,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 57 states have (on average 1.1228070175438596) internal successors, (64), 58 states have internal predecessors, (64), 12 states have call successors, (12), 10 states have call predecessors, (12), 9 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 14:03:11,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 86 transitions. [2022-03-20 14:03:11,198 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 86 transitions. Word has length 50 [2022-03-20 14:03:11,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:03:11,198 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 86 transitions. [2022-03-20 14:03:11,198 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 2.0) internal successors, (30), 17 states have internal predecessors, (30), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-20 14:03:11,198 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 86 transitions. [2022-03-20 14:03:11,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-20 14:03:11,199 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:03:11,199 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:03:11,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 14:03:11,399 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 [2022-03-20 14:03:11,400 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:03:11,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:03:11,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1484106385, now seen corresponding path program 7 times [2022-03-20 14:03:11,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:03:11,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1879506336] [2022-03-20 14:03:11,401 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:03:11,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1484106385, now seen corresponding path program 8 times [2022-03-20 14:03:11,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:03:11,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767661001] [2022-03-20 14:03:11,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:03:11,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:03:11,410 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:03:11,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1537247878] [2022-03-20 14:03:11,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:03:11,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:03:11,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:03:11,412 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) [2022-03-20 14:03:11,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 14:03:11,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:03:11,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:03:11,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-20 14:03:11,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:03:11,939 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 14:03:12,112 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 23 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 14:03:12,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:03:12,489 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-03-20 14:03:12,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:03:12,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767661001] [2022-03-20 14:03:12,490 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:03:12,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537247878] [2022-03-20 14:03:12,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537247878] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:03:12,490 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:03:12,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2022-03-20 14:03:12,490 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:03:12,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1879506336] [2022-03-20 14:03:12,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1879506336] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:03:12,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:03:12,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 14:03:12,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845250427] [2022-03-20 14:03:12,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:03:12,491 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 14:03:12,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:03:12,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 14:03:12,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-03-20 14:03:12,492 INFO L87 Difference]: Start difference. First operand 79 states and 86 transitions. Second operand has 14 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-20 14:03:12,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:03:12,958 INFO L93 Difference]: Finished difference Result 97 states and 108 transitions. [2022-03-20 14:03:12,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 14:03:12,959 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 50 [2022-03-20 14:03:12,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:03:12,959 INFO L225 Difference]: With dead ends: 97 [2022-03-20 14:03:12,959 INFO L226 Difference]: Without dead ends: 95 [2022-03-20 14:03:12,960 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 79 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2022-03-20 14:03:12,960 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 17 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 14:03:12,960 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 279 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 14:03:12,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-03-20 14:03:12,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2022-03-20 14:03:12,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 66 states have (on average 1.121212121212121) internal successors, (74), 68 states have internal predecessors, (74), 14 states have call successors, (14), 11 states have call predecessors, (14), 10 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 14:03:12,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2022-03-20 14:03:12,987 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 50 [2022-03-20 14:03:12,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:03:12,987 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2022-03-20 14:03:12,987 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-20 14:03:12,987 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2022-03-20 14:03:12,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-20 14:03:12,988 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:03:12,988 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:03:13,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-20 14:03:13,199 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 [2022-03-20 14:03:13,199 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:03:13,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:03:13,200 INFO L85 PathProgramCache]: Analyzing trace with hash 290900977, now seen corresponding path program 9 times [2022-03-20 14:03:13,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:03:13,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [267101745] [2022-03-20 14:03:13,200 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:03:13,200 INFO L85 PathProgramCache]: Analyzing trace with hash 290900977, now seen corresponding path program 10 times [2022-03-20 14:03:13,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:03:13,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239621125] [2022-03-20 14:03:13,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:03:13,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:03:13,211 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:03:13,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [273521548] [2022-03-20 14:03:13,211 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 14:03:13,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:03:13,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:03:13,220 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) [2022-03-20 14:03:13,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 14:03:13,251 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 14:03:13,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:03:13,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 14:03:13,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:03:13,362 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 14:03:13,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:03:13,496 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 14:03:13,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:03:13,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239621125] [2022-03-20 14:03:13,497 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:03:13,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273521548] [2022-03-20 14:03:13,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273521548] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:03:13,497 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:03:13,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-20 14:03:13,497 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:03:13,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [267101745] [2022-03-20 14:03:13,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [267101745] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:03:13,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:03:13,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:03:13,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681010807] [2022-03-20 14:03:13,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:03:13,498 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 14:03:13,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:03:13,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 14:03:13,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-20 14:03:13,499 INFO L87 Difference]: Start difference. First operand 91 states and 100 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-20 14:03:13,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:03:13,600 INFO L93 Difference]: Finished difference Result 126 states and 145 transitions. [2022-03-20 14:03:13,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 14:03:13,600 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 50 [2022-03-20 14:03:13,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:03:13,601 INFO L225 Difference]: With dead ends: 126 [2022-03-20 14:03:13,601 INFO L226 Difference]: Without dead ends: 113 [2022-03-20 14:03:13,601 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-03-20 14:03:13,602 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 4 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 14:03:13,602 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 113 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 14:03:13,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-03-20 14:03:13,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 109. [2022-03-20 14:03:13,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 80 states have (on average 1.125) internal successors, (90), 82 states have internal predecessors, (90), 18 states have call successors, (18), 11 states have call predecessors, (18), 10 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 14:03:13,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 124 transitions. [2022-03-20 14:03:13,636 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 124 transitions. Word has length 50 [2022-03-20 14:03:13,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:03:13,637 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 124 transitions. [2022-03-20 14:03:13,637 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-20 14:03:13,637 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 124 transitions. [2022-03-20 14:03:13,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-20 14:03:13,637 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:03:13,637 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:03:13,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-20 14:03:13,847 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 [2022-03-20 14:03:13,847 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:03:13,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:03:13,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1452517941, now seen corresponding path program 11 times [2022-03-20 14:03:13,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:03:13,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1254304136] [2022-03-20 14:03:13,848 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:03:13,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1452517941, now seen corresponding path program 12 times [2022-03-20 14:03:13,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:03:13,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255415921] [2022-03-20 14:03:13,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:03:13,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:03:13,855 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:03:13,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1601219331] [2022-03-20 14:03:13,856 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 14:03:13,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:03:13,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:03:13,857 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) [2022-03-20 14:03:13,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-20 14:03:13,901 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-20 14:03:13,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:03:13,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-20 14:03:13,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:03:14,424 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 14:03:14,622 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 23 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 14:03:14,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:03:15,023 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-03-20 14:03:15,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:03:15,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255415921] [2022-03-20 14:03:15,024 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:03:15,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601219331] [2022-03-20 14:03:15,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601219331] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:03:15,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:03:15,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11] total 23 [2022-03-20 14:03:15,024 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:03:15,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1254304136] [2022-03-20 14:03:15,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1254304136] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:03:15,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:03:15,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 14:03:15,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882582753] [2022-03-20 14:03:15,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:03:15,025 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 14:03:15,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:03:15,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 14:03:15,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2022-03-20 14:03:15,026 INFO L87 Difference]: Start difference. First operand 109 states and 124 transitions. Second operand has 17 states, 14 states have (on average 2.142857142857143) internal successors, (30), 16 states have internal predecessors, (30), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-20 14:03:15,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:03:15,643 INFO L93 Difference]: Finished difference Result 122 states and 139 transitions. [2022-03-20 14:03:15,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 14:03:15,644 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 2.142857142857143) internal successors, (30), 16 states have internal predecessors, (30), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 50 [2022-03-20 14:03:15,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:03:15,645 INFO L225 Difference]: With dead ends: 122 [2022-03-20 14:03:15,645 INFO L226 Difference]: Without dead ends: 120 [2022-03-20 14:03:15,646 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2022-03-20 14:03:15,646 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 20 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 14:03:15,646 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 313 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 14:03:15,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-03-20 14:03:15,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 116. [2022-03-20 14:03:15,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 85 states have (on average 1.1176470588235294) internal successors, (95), 88 states have internal predecessors, (95), 19 states have call successors, (19), 12 states have call predecessors, (19), 11 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 14:03:15,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 131 transitions. [2022-03-20 14:03:15,679 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 131 transitions. Word has length 50 [2022-03-20 14:03:15,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:03:15,679 INFO L478 AbstractCegarLoop]: Abstraction has 116 states and 131 transitions. [2022-03-20 14:03:15,679 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 2.142857142857143) internal successors, (30), 16 states have internal predecessors, (30), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-20 14:03:15,680 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 131 transitions. [2022-03-20 14:03:15,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-20 14:03:15,680 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:03:15,680 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:03:15,697 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-03-20 14:03:15,881 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 [2022-03-20 14:03:15,881 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:03:15,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:03:15,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1343557775, now seen corresponding path program 13 times [2022-03-20 14:03:15,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:03:15,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2133759429] [2022-03-20 14:03:15,882 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:03:15,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1343557775, now seen corresponding path program 14 times [2022-03-20 14:03:15,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:03:15,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917981278] [2022-03-20 14:03:15,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:03:15,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:03:15,889 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:03:15,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1521200513] [2022-03-20 14:03:15,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:03:15,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:03:15,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:03:15,890 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) [2022-03-20 14:03:15,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-20 14:03:15,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:03:15,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:03:15,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-20 14:03:15,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:03:16,803 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 14:03:16,805 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 14:03:16,807 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 14:03:25,213 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 23 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 14:03:25,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:03:31,712 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-03-20 14:03:31,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:03:31,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917981278] [2022-03-20 14:03:31,712 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:03:31,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521200513] [2022-03-20 14:03:31,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521200513] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:03:31,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:03:31,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10] total 24 [2022-03-20 14:03:31,713 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:03:31,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2133759429] [2022-03-20 14:03:31,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2133759429] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:03:31,713 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:03:31,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 14:03:31,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803487605] [2022-03-20 14:03:31,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:03:31,714 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 14:03:31,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:03:31,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 14:03:31,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2022-03-20 14:03:31,715 INFO L87 Difference]: Start difference. First operand 116 states and 131 transitions. Second operand has 19 states, 16 states have (on average 1.875) internal successors, (30), 17 states have internal predecessors, (30), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-20 14:03:33,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:03:33,643 INFO L93 Difference]: Finished difference Result 134 states and 151 transitions. [2022-03-20 14:03:33,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 14:03:33,644 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 1.875) internal successors, (30), 17 states have internal predecessors, (30), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 50 [2022-03-20 14:03:33,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:03:33,645 INFO L225 Difference]: With dead ends: 134 [2022-03-20 14:03:33,645 INFO L226 Difference]: Without dead ends: 132 [2022-03-20 14:03:33,646 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2022-03-20 14:03:33,646 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 19 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-20 14:03:33,647 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 398 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-20 14:03:33,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-03-20 14:03:33,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 121. [2022-03-20 14:03:33,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 89 states have (on average 1.1235955056179776) internal successors, (100), 92 states have internal predecessors, (100), 19 states have call successors, (19), 13 states have call predecessors, (19), 12 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 14:03:33,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 136 transitions. [2022-03-20 14:03:33,687 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 136 transitions. Word has length 50 [2022-03-20 14:03:33,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:03:33,688 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 136 transitions. [2022-03-20 14:03:33,688 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 1.875) internal successors, (30), 17 states have internal predecessors, (30), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-20 14:03:33,688 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 136 transitions. [2022-03-20 14:03:33,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-20 14:03:33,688 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:03:33,688 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:03:33,705 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-03-20 14:03:33,889 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 [2022-03-20 14:03:33,889 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:03:33,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:03:33,889 INFO L85 PathProgramCache]: Analyzing trace with hash 431449587, now seen corresponding path program 5 times [2022-03-20 14:03:33,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:03:33,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [747462869] [2022-03-20 14:03:33,890 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:03:33,890 INFO L85 PathProgramCache]: Analyzing trace with hash 431449587, now seen corresponding path program 6 times [2022-03-20 14:03:33,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:03:33,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275576895] [2022-03-20 14:03:33,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:03:33,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:03:33,896 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:03:33,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1735428593] [2022-03-20 14:03:33,896 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 14:03:33,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:03:33,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:03:33,898 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) [2022-03-20 14:03:33,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-20 14:03:33,949 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-20 14:03:33,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:03:33,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-20 14:03:33,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:03:34,620 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 14:03:34,621 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 14:03:34,623 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 14:03:34,625 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 14:03:34,632 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 14:03:34,636 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 14:03:34,637 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 14:04:36,371 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 14:04:36,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:04:37,852 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-03-20 14:04:37,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:04:37,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275576895] [2022-03-20 14:04:37,853 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:04:37,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735428593] [2022-03-20 14:04:37,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735428593] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:04:37,853 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:04:37,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11] total 24 [2022-03-20 14:04:37,853 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:04:37,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [747462869] [2022-03-20 14:04:37,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [747462869] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:04:37,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:04:37,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 14:04:37,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095795791] [2022-03-20 14:04:37,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:04:37,854 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 14:04:37,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:04:37,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 14:04:37,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2022-03-20 14:04:37,854 INFO L87 Difference]: Start difference. First operand 121 states and 136 transitions. Second operand has 18 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-20 14:04:40,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:04:40,527 INFO L93 Difference]: Finished difference Result 134 states and 151 transitions. [2022-03-20 14:04:40,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 14:04:40,528 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 50 [2022-03-20 14:04:40,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:04:40,529 INFO L225 Difference]: With dead ends: 134 [2022-03-20 14:04:40,529 INFO L226 Difference]: Without dead ends: 132 [2022-03-20 14:04:40,529 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2022-03-20 14:04:40,530 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 21 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-20 14:04:40,530 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 247 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-20 14:04:40,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-03-20 14:04:40,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 121. [2022-03-20 14:04:40,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 89 states have (on average 1.1235955056179776) internal successors, (100), 92 states have internal predecessors, (100), 19 states have call successors, (19), 13 states have call predecessors, (19), 12 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 14:04:40,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 136 transitions. [2022-03-20 14:04:40,569 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 136 transitions. Word has length 50 [2022-03-20 14:04:40,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:04:40,570 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 136 transitions. [2022-03-20 14:04:40,570 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-20 14:04:40,570 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 136 transitions. [2022-03-20 14:04:40,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-20 14:04:40,570 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:04:40,570 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 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] [2022-03-20 14:04:40,588 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-03-20 14:04:40,778 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 [2022-03-20 14:04:40,779 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:04:40,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:04:40,779 INFO L85 PathProgramCache]: Analyzing trace with hash 55892592, now seen corresponding path program 3 times [2022-03-20 14:04:40,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:04:40,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [412012122] [2022-03-20 14:04:40,780 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:04:40,780 INFO L85 PathProgramCache]: Analyzing trace with hash 55892592, now seen corresponding path program 4 times [2022-03-20 14:04:40,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:04:40,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733791715] [2022-03-20 14:04:40,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:04:40,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:04:40,786 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:04:40,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1987317703] [2022-03-20 14:04:40,787 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 14:04:40,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:04:40,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:04:40,788 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) [2022-03-20 14:04:40,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-20 14:04:40,830 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 14:04:40,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:04:40,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-20 14:04:40,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:04:41,013 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 14:04:41,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:04:41,182 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 14:04:41,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:04:41,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733791715] [2022-03-20 14:04:41,182 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:04:41,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987317703] [2022-03-20 14:04:41,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987317703] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:04:41,182 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:04:41,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-20 14:04:41,183 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:04:41,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [412012122] [2022-03-20 14:04:41,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [412012122] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:04:41,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:04:41,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 14:04:41,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572093607] [2022-03-20 14:04:41,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:04:41,183 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 14:04:41,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:04:41,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 14:04:41,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-03-20 14:04:41,184 INFO L87 Difference]: Start difference. First operand 121 states and 136 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 6 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-03-20 14:04:41,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:04:41,302 INFO L93 Difference]: Finished difference Result 133 states and 149 transitions. [2022-03-20 14:04:41,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 14:04:41,303 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 6 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 57 [2022-03-20 14:04:41,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:04:41,304 INFO L225 Difference]: With dead ends: 133 [2022-03-20 14:04:41,304 INFO L226 Difference]: Without dead ends: 125 [2022-03-20 14:04:41,305 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-03-20 14:04:41,305 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 5 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 14:04:41,305 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 125 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 14:04:41,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-03-20 14:04:41,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 121. [2022-03-20 14:04:41,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 89 states have (on average 1.1235955056179776) internal successors, (100), 92 states have internal predecessors, (100), 19 states have call successors, (19), 13 states have call predecessors, (19), 12 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 14:04:41,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 136 transitions. [2022-03-20 14:04:41,350 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 136 transitions. Word has length 57 [2022-03-20 14:04:41,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:04:41,350 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 136 transitions. [2022-03-20 14:04:41,350 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 6 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-03-20 14:04:41,350 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 136 transitions. [2022-03-20 14:04:41,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-20 14:04:41,351 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:04:41,351 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 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] [2022-03-20 14:04:41,372 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-03-20 14:04:41,567 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 [2022-03-20 14:04:41,567 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:04:41,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:04:41,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1124973290, now seen corresponding path program 5 times [2022-03-20 14:04:41,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:04:41,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1410693594] [2022-03-20 14:04:41,568 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:04:41,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1124973290, now seen corresponding path program 6 times [2022-03-20 14:04:41,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:04:41,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494353189] [2022-03-20 14:04:41,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:04:41,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:04:41,573 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:04:41,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1279415137] [2022-03-20 14:04:41,574 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 14:04:41,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:04:41,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:04:41,577 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) [2022-03-20 14:04:41,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-20 14:04:41,616 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-20 14:04:41,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:04:41,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 14:04:41,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:04:41,823 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 14:04:41,827 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 14:04:41,828 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 14:04:57,527 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 17 proven. 20 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-03-20 14:04:57,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:04:58,201 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 29 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-20 14:04:58,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:04:58,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494353189] [2022-03-20 14:04:58,201 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:04:58,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279415137] [2022-03-20 14:04:58,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279415137] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:04:58,202 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:04:58,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2022-03-20 14:04:58,202 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:04:58,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1410693594] [2022-03-20 14:04:58,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1410693594] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:04:58,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:04:58,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 14:04:58,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350785557] [2022-03-20 14:04:58,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:04:58,202 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 14:04:58,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:04:58,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 14:04:58,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-03-20 14:04:58,203 INFO L87 Difference]: Start difference. First operand 121 states and 136 transitions. Second operand has 16 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-20 14:05:00,450 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 [] [2022-03-20 14:05:02,270 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 14:05:04,427 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 14:05:08,456 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 14:05:12,491 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 14:05:12,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:05:12,560 INFO L93 Difference]: Finished difference Result 168 states and 199 transitions. [2022-03-20 14:05:12,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 14:05:12,560 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 57 [2022-03-20 14:05:12,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:05:12,561 INFO L225 Difference]: With dead ends: 168 [2022-03-20 14:05:12,561 INFO L226 Difference]: Without dead ends: 160 [2022-03-20 14:05:12,562 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=151, Invalid=841, Unknown=0, NotChecked=0, Total=992 [2022-03-20 14:05:12,562 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 25 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 9 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2022-03-20 14:05:12,563 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 330 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 424 Invalid, 4 Unknown, 0 Unchecked, 10.2s Time] [2022-03-20 14:05:12,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-03-20 14:05:12,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 155. [2022-03-20 14:05:12,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 116 states have (on average 1.1551724137931034) internal successors, (134), 119 states have internal predecessors, (134), 26 states have call successors, (26), 13 states have call predecessors, (26), 12 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-20 14:05:12,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 184 transitions. [2022-03-20 14:05:12,620 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 184 transitions. Word has length 57 [2022-03-20 14:05:12,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:05:12,620 INFO L478 AbstractCegarLoop]: Abstraction has 155 states and 184 transitions. [2022-03-20 14:05:12,620 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-20 14:05:12,620 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 184 transitions. [2022-03-20 14:05:12,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-20 14:05:12,621 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:05:12,621 INFO L499 BasicCegarLoop]: trace histogram [5, 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] [2022-03-20 14:05:12,637 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-03-20 14:05:12,822 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 [2022-03-20 14:05:12,822 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:05:12,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:05:12,823 INFO L85 PathProgramCache]: Analyzing trace with hash -680465044, now seen corresponding path program 5 times [2022-03-20 14:05:12,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:05:12,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1468624237] [2022-03-20 14:05:12,823 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:05:12,823 INFO L85 PathProgramCache]: Analyzing trace with hash -680465044, now seen corresponding path program 6 times [2022-03-20 14:05:12,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:05:12,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335671288] [2022-03-20 14:05:12,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:05:12,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:05:12,830 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:05:12,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2129145142] [2022-03-20 14:05:12,830 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 14:05:12,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:05:12,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:05:12,838 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) [2022-03-20 14:05:12,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-20 14:05:13,249 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-20 14:05:13,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:05:13,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 14:05:13,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:05:13,417 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 14:05:13,419 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 14:05:13,420 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 14:05:20,328 WARN L833 $PredicateComparison]: unable to prove that (and (let ((.cse3 (+ c_main_~X~0 1)) (.cse2 (+ (* (- 1) c_main_~Y~0) (div (+ c_main_~v~0 c_main_~X~0) 2) (* c_main_~X~0 c_main_~y~0))) (.cse0 (= c_main_~Y~0 0)) (.cse4 (= (mod (+ (* 2 c_main_~X~0 c_main_~y~0) c_main_~v~0 c_main_~X~0) 2) 0))) (or (let ((.cse1 (div .cse2 c_main_~Y~0))) (and (not .cse0) (not (<= .cse1 c_main_~X~0)) (= (mod .cse2 c_main_~Y~0) 0) (= c_main_~xy~0 (* c_main_~y~0 .cse1)) (<= .cse1 .cse3) (= c_main_~yx~0 (* c_main_~Y~0 .cse1)) .cse4)) (and (let ((.cse6 (= c_main_~y~0 0))) (or (let ((.cse5 (div c_main_~xy~0 c_main_~y~0))) (and (<= .cse5 .cse3) (= (mod c_main_~xy~0 c_main_~y~0) 0) (not .cse6) (< c_main_~X~0 .cse5))) (and .cse6 (= c_main_~xy~0 0)))) (= 0 .cse2) .cse0 (= c_main_~yx~0 0) .cse4))) (<= 0 c_main_~X~0)) is different from false [2022-03-20 14:05:24,186 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 14:05:24,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:05:24,725 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 29 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-20 14:05:24,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:05:24,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335671288] [2022-03-20 14:05:24,726 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:05:24,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129145142] [2022-03-20 14:05:24,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129145142] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:05:24,726 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:05:24,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2022-03-20 14:05:24,726 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:05:24,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1468624237] [2022-03-20 14:05:24,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1468624237] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:05:24,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:05:24,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 14:05:24,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550634814] [2022-03-20 14:05:24,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:05:24,727 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 14:05:24,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:05:24,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 14:05:24,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=313, Unknown=1, NotChecked=36, Total=420 [2022-03-20 14:05:24,732 INFO L87 Difference]: Start difference. First operand 155 states and 184 transitions. Second operand has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-20 14:05:26,983 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse7 (* c_main_~X~0 c_main_~y~0)) (.cse3 (+ c_main_~X~0 1))) (and (let ((.cse2 (+ (* (- 1) c_main_~Y~0) (div (+ c_main_~v~0 c_main_~X~0) 2) .cse7)) (.cse0 (= c_main_~Y~0 0)) (.cse4 (= (mod (+ (* 2 c_main_~X~0 c_main_~y~0) c_main_~v~0 c_main_~X~0) 2) 0))) (or (let ((.cse1 (div .cse2 c_main_~Y~0))) (and (not .cse0) (not (<= .cse1 c_main_~X~0)) (= (mod .cse2 c_main_~Y~0) 0) (= c_main_~xy~0 (* c_main_~y~0 .cse1)) (<= .cse1 .cse3) (= c_main_~yx~0 (* c_main_~Y~0 .cse1)) .cse4)) (and (let ((.cse6 (= c_main_~y~0 0))) (or (let ((.cse5 (div c_main_~xy~0 c_main_~y~0))) (and (<= .cse5 .cse3) (= (mod c_main_~xy~0 c_main_~y~0) 0) (not .cse6) (< c_main_~X~0 .cse5))) (and .cse6 (= c_main_~xy~0 0)))) (= 0 .cse2) .cse0 (= c_main_~yx~0 0) .cse4))) (<= 0 c_main_~X~0) (not (<= c_main_~x~0 c_main_~X~0)) (= (+ (* 2 (* c_main_~Y~0 c_main_~x~0)) (* 2 c_main_~Y~0)) (+ (* 2 .cse7) c_main_~v~0 c_main_~X~0)) (<= c_main_~x~0 .cse3))) is different from false [2022-03-20 14:05:27,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:05:27,015 INFO L93 Difference]: Finished difference Result 163 states and 191 transitions. [2022-03-20 14:05:27,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 14:05:27,015 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 57 [2022-03-20 14:05:27,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:05:27,016 INFO L225 Difference]: With dead ends: 163 [2022-03-20 14:05:27,016 INFO L226 Difference]: Without dead ends: 155 [2022-03-20 14:05:27,017 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=170, Invalid=648, Unknown=2, NotChecked=110, Total=930 [2022-03-20 14:05:27,017 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 20 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 14:05:27,018 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 183 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 136 Invalid, 0 Unknown, 23 Unchecked, 0.1s Time] [2022-03-20 14:05:27,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-03-20 14:05:27,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 117. [2022-03-20 14:05:27,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 86 states have (on average 1.0930232558139534) internal successors, (94), 90 states have internal predecessors, (94), 18 states have call successors, (18), 13 states have call predecessors, (18), 12 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 14:05:27,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 129 transitions. [2022-03-20 14:05:27,057 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 129 transitions. Word has length 57 [2022-03-20 14:05:27,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:05:27,057 INFO L478 AbstractCegarLoop]: Abstraction has 117 states and 129 transitions. [2022-03-20 14:05:27,057 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-20 14:05:27,057 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 129 transitions. [2022-03-20 14:05:27,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-20 14:05:27,058 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:05:27,058 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:05:27,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-20 14:05:27,264 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 [2022-03-20 14:05:27,264 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:05:27,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:05:27,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1830651545, now seen corresponding path program 7 times [2022-03-20 14:05:27,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:05:27,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1516388246] [2022-03-20 14:05:27,265 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:05:27,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1830651545, now seen corresponding path program 8 times [2022-03-20 14:05:27,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:05:27,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437566970] [2022-03-20 14:05:27,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:05:27,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:05:27,272 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:05:27,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1696162844] [2022-03-20 14:05:27,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:05:27,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:05:27,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:05:27,274 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) [2022-03-20 14:05:27,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-20 14:05:27,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:05:27,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:05:27,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-20 14:05:27,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:05:27,748 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 11 proven. 38 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-20 14:05:27,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:05:27,969 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-03-20 14:05:27,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:05:27,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437566970] [2022-03-20 14:05:27,969 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:05:27,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696162844] [2022-03-20 14:05:27,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696162844] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:05:27,969 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:05:27,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 7] total 20 [2022-03-20 14:05:27,970 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:05:27,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1516388246] [2022-03-20 14:05:27,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1516388246] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:05:27,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:05:27,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 14:05:27,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276204470] [2022-03-20 14:05:27,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:05:27,970 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 14:05:27,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:05:27,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 14:05:27,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-03-20 14:05:27,971 INFO L87 Difference]: Start difference. First operand 117 states and 129 transitions. Second operand has 17 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2022-03-20 14:05:28,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:05:28,294 INFO L93 Difference]: Finished difference Result 130 states and 144 transitions. [2022-03-20 14:05:28,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 14:05:28,295 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 59 [2022-03-20 14:05:28,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:05:28,296 INFO L225 Difference]: With dead ends: 130 [2022-03-20 14:05:28,296 INFO L226 Difference]: Without dead ends: 128 [2022-03-20 14:05:28,297 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 94 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2022-03-20 14:05:28,297 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 20 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 14:05:28,298 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 196 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 14:05:28,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-03-20 14:05:28,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 119. [2022-03-20 14:05:28,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 88 states have (on average 1.1022727272727273) internal successors, (97), 91 states have internal predecessors, (97), 18 states have call successors, (18), 13 states have call predecessors, (18), 12 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 14:05:28,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 132 transitions. [2022-03-20 14:05:28,340 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 132 transitions. Word has length 59 [2022-03-20 14:05:28,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:05:28,340 INFO L478 AbstractCegarLoop]: Abstraction has 119 states and 132 transitions. [2022-03-20 14:05:28,340 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2022-03-20 14:05:28,340 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 132 transitions. [2022-03-20 14:05:28,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-20 14:05:28,341 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:05:28,341 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:05:28,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-20 14:05:28,542 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 [2022-03-20 14:05:28,542 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:05:28,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:05:28,543 INFO L85 PathProgramCache]: Analyzing trace with hash -689308389, now seen corresponding path program 15 times [2022-03-20 14:05:28,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:05:28,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [441409633] [2022-03-20 14:05:28,543 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:05:28,543 INFO L85 PathProgramCache]: Analyzing trace with hash -689308389, now seen corresponding path program 16 times [2022-03-20 14:05:28,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:05:28,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748404537] [2022-03-20 14:05:28,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:05:28,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:05:28,554 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:05:28,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [323477415] [2022-03-20 14:05:28,554 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 14:05:28,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:05:28,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:05:28,556 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) [2022-03-20 14:05:28,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-20 14:05:28,599 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 14:05:28,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:05:28,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-20 14:05:28,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:05:29,151 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 14:05:29,366 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-20 14:05:29,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:05:29,830 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-03-20 14:05:29,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:05:29,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748404537] [2022-03-20 14:05:29,831 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:05:29,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323477415] [2022-03-20 14:05:29,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323477415] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:05:29,831 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:05:29,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11] total 26 [2022-03-20 14:05:29,831 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:05:29,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [441409633] [2022-03-20 14:05:29,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [441409633] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:05:29,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:05:29,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 14:05:29,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411332643] [2022-03-20 14:05:29,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:05:29,832 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 14:05:29,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:05:29,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 14:05:29,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-03-20 14:05:29,833 INFO L87 Difference]: Start difference. First operand 119 states and 132 transitions. Second operand has 20 states, 17 states have (on average 2.0) internal successors, (34), 19 states have internal predecessors, (34), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-03-20 14:05:30,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:05:30,280 INFO L93 Difference]: Finished difference Result 134 states and 146 transitions. [2022-03-20 14:05:30,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 14:05:30,280 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.0) internal successors, (34), 19 states have internal predecessors, (34), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 59 [2022-03-20 14:05:30,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:05:30,281 INFO L225 Difference]: With dead ends: 134 [2022-03-20 14:05:30,281 INFO L226 Difference]: Without dead ends: 132 [2022-03-20 14:05:30,282 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 90 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2022-03-20 14:05:30,282 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 18 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 14:05:30,282 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 304 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 14:05:30,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-03-20 14:05:30,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2022-03-20 14:05:30,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 96 states have (on average 1.09375) internal successors, (105), 100 states have internal predecessors, (105), 19 states have call successors, (19), 15 states have call predecessors, (19), 14 states have return successors, (18), 14 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-20 14:05:30,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 142 transitions. [2022-03-20 14:05:30,321 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 142 transitions. Word has length 59 [2022-03-20 14:05:30,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:05:30,321 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 142 transitions. [2022-03-20 14:05:30,322 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.0) internal successors, (34), 19 states have internal predecessors, (34), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-03-20 14:05:30,322 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 142 transitions. [2022-03-20 14:05:30,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-20 14:05:30,322 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:05:30,322 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:05:30,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-20 14:05:30,530 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 [2022-03-20 14:05:30,531 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:05:30,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:05:30,531 INFO L85 PathProgramCache]: Analyzing trace with hash 809583191, now seen corresponding path program 17 times [2022-03-20 14:05:30,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:05:30,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [863842302] [2022-03-20 14:05:30,531 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:05:30,532 INFO L85 PathProgramCache]: Analyzing trace with hash 809583191, now seen corresponding path program 18 times [2022-03-20 14:05:30,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:05:30,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329236037] [2022-03-20 14:05:30,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:05:30,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:05:30,537 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:05:30,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [643174212] [2022-03-20 14:05:30,537 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 14:05:30,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:05:30,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:05:30,538 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) [2022-03-20 14:05:30,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-20 14:05:30,581 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 14:05:30,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:05:30,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-20 14:05:30,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:05:30,846 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 14:05:30,931 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 18 proven. 40 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 14:05:30,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:05:31,165 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-03-20 14:05:31,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:05:31,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329236037] [2022-03-20 14:05:31,166 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:05:31,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643174212] [2022-03-20 14:05:31,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643174212] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:05:31,166 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:05:31,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10] total 21 [2022-03-20 14:05:31,166 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:05:31,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [863842302] [2022-03-20 14:05:31,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [863842302] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:05:31,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:05:31,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 14:05:31,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582849352] [2022-03-20 14:05:31,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:05:31,167 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 14:05:31,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:05:31,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 14:05:31,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2022-03-20 14:05:31,168 INFO L87 Difference]: Start difference. First operand 130 states and 142 transitions. Second operand has 16 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 15 states have internal predecessors, (34), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-03-20 14:05:31,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:05:31,652 INFO L93 Difference]: Finished difference Result 143 states and 156 transitions. [2022-03-20 14:05:31,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 14:05:31,653 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 15 states have internal predecessors, (34), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 59 [2022-03-20 14:05:31,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:05:31,654 INFO L225 Difference]: With dead ends: 143 [2022-03-20 14:05:31,654 INFO L226 Difference]: Without dead ends: 141 [2022-03-20 14:05:31,655 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 95 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-03-20 14:05:31,655 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 17 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 14:05:31,655 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 316 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 14:05:31,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-03-20 14:05:31,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 127. [2022-03-20 14:05:31,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 94 states have (on average 1.0957446808510638) internal successors, (103), 97 states have internal predecessors, (103), 18 states have call successors, (18), 15 states have call predecessors, (18), 14 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 14:05:31,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 138 transitions. [2022-03-20 14:05:31,696 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 138 transitions. Word has length 59 [2022-03-20 14:05:31,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:05:31,696 INFO L478 AbstractCegarLoop]: Abstraction has 127 states and 138 transitions. [2022-03-20 14:05:31,696 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 15 states have internal predecessors, (34), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-03-20 14:05:31,697 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 138 transitions. [2022-03-20 14:05:31,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-20 14:05:31,697 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:05:31,697 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:05:31,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-20 14:05:31,899 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 [2022-03-20 14:05:31,900 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:05:31,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:05:31,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1971200155, now seen corresponding path program 19 times [2022-03-20 14:05:31,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:05:31,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [511376141] [2022-03-20 14:05:31,900 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:05:31,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1971200155, now seen corresponding path program 20 times [2022-03-20 14:05:31,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:05:31,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790140519] [2022-03-20 14:05:31,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:05:31,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:05:31,905 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:05:31,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [20581743] [2022-03-20 14:05:31,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:05:31,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:05:31,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:05:31,907 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) [2022-03-20 14:05:31,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-20 14:05:31,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:05:31,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:05:31,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-20 14:05:31,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:05:32,303 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 18 proven. 40 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 14:05:32,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:05:32,548 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-03-20 14:05:32,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:05:32,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790140519] [2022-03-20 14:05:32,549 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:05:32,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20581743] [2022-03-20 14:05:32,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20581743] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:05:32,549 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:05:32,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10] total 23 [2022-03-20 14:05:32,549 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:05:32,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [511376141] [2022-03-20 14:05:32,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [511376141] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:05:32,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:05:32,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 14:05:32,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985690832] [2022-03-20 14:05:32,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:05:32,550 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 14:05:32,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:05:32,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 14:05:32,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2022-03-20 14:05:32,551 INFO L87 Difference]: Start difference. First operand 127 states and 138 transitions. Second operand has 18 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 17 states have internal predecessors, (34), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-03-20 14:05:32,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:05:32,903 INFO L93 Difference]: Finished difference Result 156 states and 169 transitions. [2022-03-20 14:05:32,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 14:05:32,904 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 17 states have internal predecessors, (34), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 59 [2022-03-20 14:05:32,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:05:32,905 INFO L225 Difference]: With dead ends: 156 [2022-03-20 14:05:32,905 INFO L226 Difference]: Without dead ends: 154 [2022-03-20 14:05:32,906 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 92 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2022-03-20 14:05:32,906 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 16 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 14:05:32,906 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 346 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 14:05:32,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-03-20 14:05:32,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 145. [2022-03-20 14:05:32,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 108 states have (on average 1.0925925925925926) internal successors, (118), 111 states have internal predecessors, (118), 20 states have call successors, (20), 17 states have call predecessors, (20), 16 states have return successors, (19), 16 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-20 14:05:32,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 157 transitions. [2022-03-20 14:05:32,958 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 157 transitions. Word has length 59 [2022-03-20 14:05:32,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:05:32,958 INFO L478 AbstractCegarLoop]: Abstraction has 145 states and 157 transitions. [2022-03-20 14:05:32,958 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 17 states have internal predecessors, (34), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-03-20 14:05:32,958 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 157 transitions. [2022-03-20 14:05:32,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-20 14:05:32,959 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:05:32,959 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:05:32,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-20 14:05:33,171 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 [2022-03-20 14:05:33,171 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:05:33,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:05:33,172 INFO L85 PathProgramCache]: Analyzing trace with hash -548759779, now seen corresponding path program 21 times [2022-03-20 14:05:33,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:05:33,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1048071642] [2022-03-20 14:05:33,172 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:05:33,172 INFO L85 PathProgramCache]: Analyzing trace with hash -548759779, now seen corresponding path program 22 times [2022-03-20 14:05:33,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:05:33,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645775757] [2022-03-20 14:05:33,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:05:33,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:05:33,180 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:05:33,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [47385366] [2022-03-20 14:05:33,180 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 14:05:33,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:05:33,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:05:33,181 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) [2022-03-20 14:05:33,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-20 14:05:33,222 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 14:05:33,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:05:33,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-20 14:05:33,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:05:33,591 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 14:05:33,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:05:34,187 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 14:05:34,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:05:34,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645775757] [2022-03-20 14:05:34,187 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:05:34,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47385366] [2022-03-20 14:05:34,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47385366] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:05:34,187 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:05:34,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2022-03-20 14:05:34,188 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:05:34,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1048071642] [2022-03-20 14:05:34,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1048071642] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:05:34,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:05:34,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 14:05:34,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126618250] [2022-03-20 14:05:34,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:05:34,188 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 14:05:34,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:05:34,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 14:05:34,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2022-03-20 14:05:34,189 INFO L87 Difference]: Start difference. First operand 145 states and 157 transitions. Second operand has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 6 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-03-20 14:05:34,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:05:34,426 INFO L93 Difference]: Finished difference Result 156 states and 168 transitions. [2022-03-20 14:05:34,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 14:05:34,426 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 6 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 59 [2022-03-20 14:05:34,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:05:34,427 INFO L225 Difference]: With dead ends: 156 [2022-03-20 14:05:34,427 INFO L226 Difference]: Without dead ends: 154 [2022-03-20 14:05:34,427 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2022-03-20 14:05:34,428 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 8 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 14:05:34,430 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 322 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 14:05:34,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-03-20 14:05:34,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 136. [2022-03-20 14:05:34,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 101 states have (on average 1.0891089108910892) internal successors, (110), 104 states have internal predecessors, (110), 19 states have call successors, (19), 16 states have call predecessors, (19), 15 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-20 14:05:34,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 147 transitions. [2022-03-20 14:05:34,482 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 147 transitions. Word has length 59 [2022-03-20 14:05:34,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:05:34,482 INFO L478 AbstractCegarLoop]: Abstraction has 136 states and 147 transitions. [2022-03-20 14:05:34,482 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 6 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-03-20 14:05:34,482 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 147 transitions. [2022-03-20 14:05:34,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-20 14:05:34,482 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:05:34,482 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:05:34,501 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-03-20 14:05:34,691 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 [2022-03-20 14:05:34,692 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:05:34,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:05:34,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1434400107, now seen corresponding path program 23 times [2022-03-20 14:05:34,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:05:34,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [19103380] [2022-03-20 14:05:34,692 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:05:34,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1434400107, now seen corresponding path program 24 times [2022-03-20 14:05:34,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:05:34,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469272250] [2022-03-20 14:05:34,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:05:34,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:05:34,697 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:05:34,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [793139581] [2022-03-20 14:05:34,697 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 14:05:34,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:05:34,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:05:34,698 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) [2022-03-20 14:05:34,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-20 14:05:34,737 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 14:05:34,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:05:34,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-20 14:05:34,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:06:48,030 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 14:06:48,032 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 14:06:48,035 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 14:07:14,158 WARN L232 SmtUtils]: Spent 7.05s on a formula simplification that was a NOOP. DAG size: 90 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)