/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 11:17:38,014 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 11:17:38,015 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 11:17:38,050 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-19 11:17:38,050 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-19 11:17:38,051 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-19 11:17:38,053 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-19 11:17:38,055 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-19 11:17:38,056 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-19 11:17:38,059 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-19 11:17:38,060 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-19 11:17:38,061 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-19 11:17:38,061 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-19 11:17:38,063 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-19 11:17:38,063 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-19 11:17:38,065 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-19 11:17:38,066 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-19 11:17:38,066 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-19 11:17:38,068 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-19 11:17:38,069 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-19 11:17:38,070 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-19 11:17:38,071 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-19 11:17:38,071 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-19 11:17:38,072 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-19 11:17:38,073 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-19 11:17:38,078 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-19 11:17:38,078 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-19 11:17:38,079 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-19 11:17:38,079 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-19 11:17:38,080 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-19 11:17:38,081 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-19 11:17:38,081 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-19 11:17:38,082 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-19 11:17:38,082 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-19 11:17:38,083 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-19 11:17:38,083 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-19 11:17:38,083 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-19 11:17:38,084 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-19 11:17:38,084 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-19 11:17:38,084 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 11:17:38,084 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 11:17:38,085 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 11:17:38,086 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-19 11:17:38,094 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 11:17:38,094 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 11:17:38,095 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 11:17:38,095 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 11:17:38,095 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 11:17:38,095 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 11:17:38,095 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 11:17:38,095 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 11:17:38,095 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 11:17:38,096 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 11:17:38,096 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 11:17:38,096 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 11:17:38,096 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 11:17:38,096 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 11:17:38,096 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 11:17:38,097 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 11:17:38,097 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 11:17:38,097 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 11:17:38,097 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 11:17:38,097 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 11:17:38,097 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 11:17:38,097 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-19 11:17:38,097 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 11:17:38,255 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 11:17:38,271 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 11:17:38,273 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 11:17:38,273 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 11:17:38,275 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 11:17:38,276 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound1.c [2022-03-19 11:17:38,315 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d8f7797f/bc58750cf21a42dcb7b2502695ab702e/FLAG725be97f3 [2022-03-19 11:17:38,680 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 11:17:38,681 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound1.c [2022-03-19 11:17:38,685 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d8f7797f/bc58750cf21a42dcb7b2502695ab702e/FLAG725be97f3 [2022-03-19 11:17:38,693 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d8f7797f/bc58750cf21a42dcb7b2502695ab702e [2022-03-19 11:17:38,697 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 11:17:38,698 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 11:17:38,708 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 11:17:38,708 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 11:17:38,710 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 11:17:38,711 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 11:17:38" (1/1) ... [2022-03-19 11:17:38,711 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2322f66c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:17:38, skipping insertion in model container [2022-03-19 11:17:38,711 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 11:17:38" (1/1) ... [2022-03-19 11:17:38,716 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 11:17:38,724 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 11:17:38,837 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/hard-u_valuebound1.c[537,550] [2022-03-19 11:17:38,848 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 11:17:38,854 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 11:17:38,864 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/hard-u_valuebound1.c[537,550] [2022-03-19 11:17:38,883 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 11:17:38,891 INFO L208 MainTranslator]: Completed translation [2022-03-19 11:17:38,892 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:17:38 WrapperNode [2022-03-19 11:17:38,892 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 11:17:38,892 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 11:17:38,892 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 11:17:38,892 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 11:17:38,902 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:17:38" (1/1) ... [2022-03-19 11:17:38,902 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:17:38" (1/1) ... [2022-03-19 11:17:38,911 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:17:38" (1/1) ... [2022-03-19 11:17:38,911 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:17:38" (1/1) ... [2022-03-19 11:17:38,915 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:17:38" (1/1) ... [2022-03-19 11:17:38,918 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:17:38" (1/1) ... [2022-03-19 11:17:38,918 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:17:38" (1/1) ... [2022-03-19 11:17:38,919 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 11:17:38,920 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 11:17:38,920 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 11:17:38,920 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 11:17:38,921 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:17:38" (1/1) ... [2022-03-19 11:17:38,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 11:17:38,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 11:17:38,947 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-19 11:17:38,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-19 11:17:38,981 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 11:17:38,981 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 11:17:38,981 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 11:17:38,981 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 11:17:38,982 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 11:17:38,982 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 11:17:38,982 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 11:17:38,982 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 11:17:38,982 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 11:17:38,983 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 11:17:38,983 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-19 11:17:38,983 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 11:17:38,983 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 11:17:38,984 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 11:17:38,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 11:17:38,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 11:17:38,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 11:17:38,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 11:17:38,986 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 11:17:38,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 11:17:39,037 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 11:17:39,038 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 11:17:39,138 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 11:17:39,142 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 11:17:39,142 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-19 11:17:39,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 11:17:39 BoogieIcfgContainer [2022-03-19 11:17:39,143 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 11:17:39,144 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 11:17:39,144 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 11:17:39,156 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 11:17:39,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 11:17:38" (1/3) ... [2022-03-19 11:17:39,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36bbcb09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 11:17:39, skipping insertion in model container [2022-03-19 11:17:39,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:17:38" (2/3) ... [2022-03-19 11:17:39,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36bbcb09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 11:17:39, skipping insertion in model container [2022-03-19 11:17:39,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 11:17:39" (3/3) ... [2022-03-19 11:17:39,158 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_valuebound1.c [2022-03-19 11:17:39,175 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 11:17:39,175 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 11:17:39,205 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 11:17:39,209 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-19 11:17:39,210 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 11:17:39,222 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-19 11:17:39,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-19 11:17:39,248 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 11:17:39,248 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 11:17:39,248 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 11:17:39,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 11:17:39,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1784424332, now seen corresponding path program 1 times [2022-03-19 11:17:39,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 11:17:39,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [499166808] [2022-03-19 11:17:39,265 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 11:17:39,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1784424332, now seen corresponding path program 2 times [2022-03-19 11:17:39,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 11:17:39,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486525341] [2022-03-19 11:17:39,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 11:17:39,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 11:17:39,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 11:17:39,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 11:17:39,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 11:17:39,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 11:17:39,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 11:17:39,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 11:17:39,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 11:17:39,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 11:17:39,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 11:17:39,413 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 11:17:39,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 11:17:39,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486525341] [2022-03-19 11:17:39,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486525341] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:17:39,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:17:39,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 11:17:39,416 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 11:17:39,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [499166808] [2022-03-19 11:17:39,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [499166808] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:17:39,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:17:39,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 11:17:39,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587165292] [2022-03-19 11:17:39,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 11:17:39,420 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 11:17:39,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 11:17:39,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 11:17:39,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 11:17:39,440 INFO L87 Difference]: Start difference. First operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 11:17:39,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 11:17:39,503 INFO L93 Difference]: Finished difference Result 69 states and 110 transitions. [2022-03-19 11:17:39,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 11:17:39,505 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-03-19 11:17:39,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 11:17:39,509 INFO L225 Difference]: With dead ends: 69 [2022-03-19 11:17:39,509 INFO L226 Difference]: Without dead ends: 33 [2022-03-19 11:17:39,512 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 11:17:39,514 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 11:17:39,514 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 41 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 11:17:39,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-19 11:17:39,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-03-19 11:17:39,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 11:17:39,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2022-03-19 11:17:39,558 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2022-03-19 11:17:39,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 11:17:39,559 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2022-03-19 11:17:39,559 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 11:17:39,559 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2022-03-19 11:17:39,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-19 11:17:39,560 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 11:17:39,560 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 11:17:39,560 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 11:17:39,561 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 11:17:39,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 11:17:39,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1361835634, now seen corresponding path program 1 times [2022-03-19 11:17:39,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 11:17:39,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [872493921] [2022-03-19 11:17:39,562 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 11:17:39,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1361835634, now seen corresponding path program 2 times [2022-03-19 11:17:39,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 11:17:39,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303379948] [2022-03-19 11:17:39,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 11:17:39,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 11:17:39,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 11:17:39,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 11:17:39,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 11:17:39,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 11:17:39,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 11:17:39,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 11:17:39,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 11:17:39,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 11:17:39,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 11:17:39,649 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 11:17:39,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 11:17:39,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303379948] [2022-03-19 11:17:39,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303379948] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:17:39,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:17:39,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 11:17:39,650 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 11:17:39,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [872493921] [2022-03-19 11:17:39,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [872493921] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:17:39,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:17:39,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 11:17:39,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182793559] [2022-03-19 11:17:39,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 11:17:39,652 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 11:17:39,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 11:17:39,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 11:17:39,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-19 11:17:39,653 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-19 11:17:39,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 11:17:39,783 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2022-03-19 11:17:39,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 11:17:39,784 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2022-03-19 11:17:39,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 11:17:39,785 INFO L225 Difference]: With dead ends: 46 [2022-03-19 11:17:39,785 INFO L226 Difference]: Without dead ends: 44 [2022-03-19 11:17:39,785 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-19 11:17:39,786 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 38 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 11:17:39,787 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 48 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 11:17:39,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-19 11:17:39,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-03-19 11:17:39,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 11:17:39,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2022-03-19 11:17:39,795 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2022-03-19 11:17:39,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 11:17:39,795 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2022-03-19 11:17:39,795 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-19 11:17:39,795 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2022-03-19 11:17:39,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-19 11:17:39,796 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 11:17:39,796 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 11:17:39,796 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-19 11:17:39,796 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 11:17:39,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 11:17:39,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1382067636, now seen corresponding path program 1 times [2022-03-19 11:17:39,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 11:17:39,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1224270681] [2022-03-19 11:17:39,797 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 11:17:39,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1382067636, now seen corresponding path program 2 times [2022-03-19 11:17:39,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 11:17:39,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569467950] [2022-03-19 11:17:39,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 11:17:39,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 11:17:39,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 11:17:39,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 11:17:39,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 11:17:39,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 11:17:39,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 11:17:39,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 11:17:39,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 11:17:39,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 11:17:39,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 11:17:39,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-19 11:17:39,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 11:17:39,901 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 11:17:39,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 11:17:39,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569467950] [2022-03-19 11:17:39,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569467950] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:17:39,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:17:39,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 11:17:39,901 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 11:17:39,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1224270681] [2022-03-19 11:17:39,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1224270681] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:17:39,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:17:39,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 11:17:39,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786225448] [2022-03-19 11:17:39,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 11:17:39,902 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 11:17:39,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 11:17:39,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 11:17:39,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-19 11:17:39,903 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 11:17:40,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 11:17:40,040 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2022-03-19 11:17:40,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 11:17:40,041 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-03-19 11:17:40,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 11:17:40,042 INFO L225 Difference]: With dead ends: 50 [2022-03-19 11:17:40,042 INFO L226 Difference]: Without dead ends: 48 [2022-03-19 11:17:40,042 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-19 11:17:40,043 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 11:17:40,043 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 48 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 11:17:40,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-19 11:17:40,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2022-03-19 11:17:40,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 11:17:40,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2022-03-19 11:17:40,050 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2022-03-19 11:17:40,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 11:17:40,050 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2022-03-19 11:17:40,050 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 11:17:40,050 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2022-03-19 11:17:40,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-19 11:17:40,051 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 11:17:40,051 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 11:17:40,051 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-19 11:17:40,052 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 11:17:40,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 11:17:40,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1455208590, now seen corresponding path program 1 times [2022-03-19 11:17:40,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 11:17:40,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1722017080] [2022-03-19 11:17:40,053 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 11:17:40,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1455208590, now seen corresponding path program 2 times [2022-03-19 11:17:40,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 11:17:40,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676847800] [2022-03-19 11:17:40,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 11:17:40,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 11:17:40,064 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 11:17:40,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1786742232] [2022-03-19 11:17:40,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 11:17:40,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:17:40,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 11:17:40,066 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 11:17:40,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 11:17:40,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 11:17:40,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 11:17:40,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 11:17:40,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 11:17:40,204 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-19 11:17:40,204 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 11:17:40,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 11:17:40,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676847800] [2022-03-19 11:17:40,205 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 11:17:40,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786742232] [2022-03-19 11:17:40,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786742232] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:17:40,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:17:40,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 11:17:40,206 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 11:17:40,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1722017080] [2022-03-19 11:17:40,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1722017080] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:17:40,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:17:40,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 11:17:40,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485723308] [2022-03-19 11:17:40,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 11:17:40,207 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 11:17:40,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 11:17:40,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 11:17:40,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 11:17:40,207 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-19 11:17:42,244 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-19 11:17:42,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 11:17:42,442 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2022-03-19 11:17:42,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 11:17:42,442 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2022-03-19 11:17:42,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 11:17:42,443 INFO L225 Difference]: With dead ends: 58 [2022-03-19 11:17:42,443 INFO L226 Difference]: Without dead ends: 55 [2022-03-19 11:17:42,444 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 11:17:42,444 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 8 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-19 11:17:42,445 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 154 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-03-19 11:17:42,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-19 11:17:42,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-03-19 11:17:42,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.2) internal successors, (36), 32 states have internal predecessors, (36), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-19 11:17:42,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 69 transitions. [2022-03-19 11:17:42,453 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 69 transitions. Word has length 38 [2022-03-19 11:17:42,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 11:17:42,453 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 69 transitions. [2022-03-19 11:17:42,453 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-19 11:17:42,453 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 69 transitions. [2022-03-19 11:17:42,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-19 11:17:42,454 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 11:17:42,454 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 11:17:42,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-19 11:17:42,660 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:17:42,661 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 11:17:42,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 11:17:42,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1688067263, now seen corresponding path program 1 times [2022-03-19 11:17:42,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 11:17:42,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [180940251] [2022-03-19 11:17:42,662 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 11:17:42,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1688067263, now seen corresponding path program 2 times [2022-03-19 11:17:42,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 11:17:42,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442043849] [2022-03-19 11:17:42,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 11:17:42,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 11:17:42,671 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 11:17:42,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1149634627] [2022-03-19 11:17:42,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 11:17:42,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:17:42,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 11:17:42,673 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 11:17:42,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 11:17:42,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 11:17:42,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 11:17:42,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-19 11:17:42,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 11:17:43,000 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-19 11:17:43,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 11:17:43,208 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 11:17:43,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 11:17:43,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442043849] [2022-03-19 11:17:43,208 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 11:17:43,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149634627] [2022-03-19 11:17:43,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149634627] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-19 11:17:43,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 11:17:43,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-03-19 11:17:43,209 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 11:17:43,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [180940251] [2022-03-19 11:17:43,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [180940251] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:17:43,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:17:43,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 11:17:43,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940645145] [2022-03-19 11:17:43,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 11:17:43,210 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 11:17:43,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 11:17:43,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 11:17:43,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-03-19 11:17:43,211 INFO L87 Difference]: Start difference. First operand 55 states and 69 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 11:17:43,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 11:17:43,293 INFO L93 Difference]: Finished difference Result 68 states and 86 transitions. [2022-03-19 11:17:43,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 11:17:43,294 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 45 [2022-03-19 11:17:43,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 11:17:43,295 INFO L225 Difference]: With dead ends: 68 [2022-03-19 11:17:43,295 INFO L226 Difference]: Without dead ends: 66 [2022-03-19 11:17:43,295 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-19 11:17:43,296 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 16 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 11:17:43,296 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 145 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 11:17:43,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-03-19 11:17:43,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2022-03-19 11:17:43,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 38 states have internal predecessors, (44), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-19 11:17:43,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 81 transitions. [2022-03-19 11:17:43,305 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 81 transitions. Word has length 45 [2022-03-19 11:17:43,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 11:17:43,306 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 81 transitions. [2022-03-19 11:17:43,306 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 11:17:43,306 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 81 transitions. [2022-03-19 11:17:43,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-19 11:17:43,309 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 11:17:43,310 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 11:17:43,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 11:17:43,519 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:17:43,519 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 11:17:43,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 11:17:43,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1471734606, now seen corresponding path program 1 times [2022-03-19 11:17:43,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 11:17:43,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [124598379] [2022-03-19 11:17:43,521 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 11:17:43,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1471734606, now seen corresponding path program 2 times [2022-03-19 11:17:43,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 11:17:43,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477941339] [2022-03-19 11:17:43,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 11:17:43,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 11:17:43,530 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 11:17:43,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [29363323] [2022-03-19 11:17:43,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 11:17:43,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:17:43,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 11:17:43,532 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 11:17:43,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 11:17:43,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 11:17:43,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 11:17:43,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-19 11:17:43,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 11:17:43,751 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-19 11:17:43,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 11:17:43,914 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-19 11:17:43,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 11:17:43,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477941339] [2022-03-19 11:17:43,915 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 11:17:43,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29363323] [2022-03-19 11:17:43,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29363323] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-19 11:17:43,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 11:17:43,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 8 [2022-03-19 11:17:43,918 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 11:17:43,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [124598379] [2022-03-19 11:17:43,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [124598379] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:17:43,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:17:43,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 11:17:43,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139171952] [2022-03-19 11:17:43,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 11:17:43,921 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 11:17:43,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 11:17:43,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 11:17:43,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-03-19 11:17:43,921 INFO L87 Difference]: Start difference. First operand 64 states and 81 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-19 11:17:45,964 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 11:17:48,008 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 11:17:50,039 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 11:17:50,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 11:17:50,170 INFO L93 Difference]: Finished difference Result 76 states and 92 transitions. [2022-03-19 11:17:50,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 11:17:50,171 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 55 [2022-03-19 11:17:50,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 11:17:50,173 INFO L225 Difference]: With dead ends: 76 [2022-03-19 11:17:50,173 INFO L226 Difference]: Without dead ends: 74 [2022-03-19 11:17:50,173 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-03-19 11:17:50,174 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 9 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-03-19 11:17:50,174 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 144 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 3 Unknown, 0 Unchecked, 6.2s Time] [2022-03-19 11:17:50,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-19 11:17:50,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2022-03-19 11:17:50,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 44 states have internal predecessors, (50), 20 states have call successors, (20), 10 states have call predecessors, (20), 9 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-19 11:17:50,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 87 transitions. [2022-03-19 11:17:50,188 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 87 transitions. Word has length 55 [2022-03-19 11:17:50,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 11:17:50,188 INFO L478 AbstractCegarLoop]: Abstraction has 72 states and 87 transitions. [2022-03-19 11:17:50,188 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-19 11:17:50,188 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 87 transitions. [2022-03-19 11:17:50,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-19 11:17:50,189 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 11:17:50,189 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 11:17:50,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 11:17:50,406 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:17:50,406 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 11:17:50,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 11:17:50,406 INFO L85 PathProgramCache]: Analyzing trace with hash -682689219, now seen corresponding path program 1 times [2022-03-19 11:17:50,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 11:17:50,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [719295197] [2022-03-19 11:17:50,407 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 11:17:50,407 INFO L85 PathProgramCache]: Analyzing trace with hash -682689219, now seen corresponding path program 2 times [2022-03-19 11:17:50,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 11:17:50,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259557677] [2022-03-19 11:17:50,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 11:17:50,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 11:17:50,417 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 11:17:50,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [272983723] [2022-03-19 11:17:50,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 11:17:50,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:17:50,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 11:17:50,427 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 11:17:50,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 11:17:50,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 11:17:50,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 11:17:50,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-19 11:17:50,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 11:17:50,772 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-03-19 11:17:50,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 11:17:50,971 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-19 11:17:50,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 11:17:50,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259557677] [2022-03-19 11:17:50,971 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 11:17:50,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272983723] [2022-03-19 11:17:50,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272983723] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-19 11:17:50,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 11:17:50,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-03-19 11:17:50,972 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 11:17:50,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [719295197] [2022-03-19 11:17:50,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [719295197] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:17:50,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:17:50,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 11:17:50,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529119185] [2022-03-19 11:17:50,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 11:17:50,973 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 11:17:50,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 11:17:50,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 11:17:50,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-19 11:17:50,973 INFO L87 Difference]: Start difference. First operand 72 states and 87 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-19 11:17:53,034 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 11:17:53,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 11:17:53,187 INFO L93 Difference]: Finished difference Result 78 states and 92 transitions. [2022-03-19 11:17:53,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 11:17:53,188 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 56 [2022-03-19 11:17:53,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 11:17:53,189 INFO L225 Difference]: With dead ends: 78 [2022-03-19 11:17:53,189 INFO L226 Difference]: Without dead ends: 71 [2022-03-19 11:17:53,189 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-03-19 11:17:53,190 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 9 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-19 11:17:53,190 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 199 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-03-19 11:17:53,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-03-19 11:17:53,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-03-19 11:17:53,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 43 states have internal predecessors, (49), 19 states have call successors, (19), 10 states have call predecessors, (19), 9 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-19 11:17:53,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2022-03-19 11:17:53,214 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 56 [2022-03-19 11:17:53,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 11:17:53,214 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2022-03-19 11:17:53,214 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-19 11:17:53,214 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2022-03-19 11:17:53,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-19 11:17:53,215 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 11:17:53,215 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 11:17:53,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 11:17:53,415 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:17:53,416 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 11:17:53,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 11:17:53,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1586192473, now seen corresponding path program 1 times [2022-03-19 11:17:53,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 11:17:53,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [23521516] [2022-03-19 11:17:53,417 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 11:17:53,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1586192473, now seen corresponding path program 2 times [2022-03-19 11:17:53,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 11:17:53,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849737536] [2022-03-19 11:17:53,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 11:17:53,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 11:17:53,424 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 11:17:53,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [521740661] [2022-03-19 11:17:53,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 11:17:53,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:17:53,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 11:17:53,426 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 11:17:53,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process