/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/cohendiv-ll_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-18 01:54:40,911 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 01:54:40,912 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 01:54:40,971 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-18 01:54:40,971 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-18 01:54:40,972 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-18 01:54:40,973 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-18 01:54:40,974 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-18 01:54:40,976 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-18 01:54:40,984 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-18 01:54:40,985 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-18 01:54:40,987 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-18 01:54:40,988 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-18 01:54:40,992 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-18 01:54:40,992 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-18 01:54:40,994 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-18 01:54:40,994 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-18 01:54:40,996 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-18 01:54:41,000 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-18 01:54:41,001 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-18 01:54:41,002 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-18 01:54:41,003 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-18 01:54:41,004 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-18 01:54:41,005 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-18 01:54:41,006 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-18 01:54:41,013 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-18 01:54:41,013 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-18 01:54:41,014 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-18 01:54:41,014 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-18 01:54:41,015 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-18 01:54:41,015 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-18 01:54:41,016 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-18 01:54:41,016 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-18 01:54:41,017 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-18 01:54:41,017 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-18 01:54:41,018 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-18 01:54:41,018 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-18 01:54:41,019 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-18 01:54:41,019 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-18 01:54:41,019 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 01:54:41,020 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 01:54:41,023 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 01:54:41,024 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-18 01:54:41,033 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 01:54:41,034 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 01:54:41,035 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 01:54:41,036 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 01:54:41,036 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 01:54:41,036 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 01:54:41,036 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 01:54:41,036 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 01:54:41,036 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 01:54:41,037 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 01:54:41,037 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 01:54:41,037 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 01:54:41,037 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 01:54:41,037 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 01:54:41,038 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 01:54:41,038 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 01:54:41,038 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 01:54:41,038 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-18 01:54:41,038 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-18 01:54:41,038 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-18 01:54:41,038 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 01:54:41,038 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-18 01:54:41,038 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 01:54:41,226 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 01:54:41,246 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 01:54:41,247 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 01:54:41,248 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 01:54:41,250 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 01:54:41,250 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound5.c [2022-03-18 01:54:41,308 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b14816d4/b3dd42f752ba445d8c61b4895021a74a/FLAGebd1033e8 [2022-03-18 01:54:41,661 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 01:54:41,662 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound5.c [2022-03-18 01:54:41,667 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b14816d4/b3dd42f752ba445d8c61b4895021a74a/FLAGebd1033e8 [2022-03-18 01:54:41,675 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b14816d4/b3dd42f752ba445d8c61b4895021a74a [2022-03-18 01:54:41,677 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 01:54:41,678 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 01:54:41,687 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 01:54:41,688 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 01:54:41,693 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 01:54:41,694 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 01:54:41" (1/1) ... [2022-03-18 01:54:41,695 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a95ebfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:54:41, skipping insertion in model container [2022-03-18 01:54:41,695 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 01:54:41" (1/1) ... [2022-03-18 01:54:41,701 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 01:54:41,713 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 01:54:41,831 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/cohendiv-ll_valuebound5.c[576,589] [2022-03-18 01:54:41,848 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 01:54:41,859 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 01:54:41,881 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/cohendiv-ll_valuebound5.c[576,589] [2022-03-18 01:54:41,893 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 01:54:41,903 INFO L208 MainTranslator]: Completed translation [2022-03-18 01:54:41,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:54:41 WrapperNode [2022-03-18 01:54:41,904 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 01:54:41,904 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 01:54:41,905 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 01:54:41,905 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 01:54:41,918 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:54:41" (1/1) ... [2022-03-18 01:54:41,918 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:54:41" (1/1) ... [2022-03-18 01:54:41,924 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:54:41" (1/1) ... [2022-03-18 01:54:41,925 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:54:41" (1/1) ... [2022-03-18 01:54:41,928 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:54:41" (1/1) ... [2022-03-18 01:54:41,931 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:54:41" (1/1) ... [2022-03-18 01:54:41,932 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:54:41" (1/1) ... [2022-03-18 01:54:41,934 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 01:54:41,934 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 01:54:41,934 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 01:54:41,934 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 01:54:41,935 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:54:41" (1/1) ... [2022-03-18 01:54:41,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 01:54:41,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:54:41,965 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) [2022-03-18 01:54:41,971 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 [2022-03-18 01:54:41,997 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 01:54:41,998 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 01:54:41,998 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 01:54:41,998 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 01:54:41,998 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 01:54:41,998 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 01:54:41,998 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 01:54:41,998 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 01:54:41,999 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 01:54:41,999 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 01:54:41,999 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 01:54:41,999 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 01:54:41,999 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 01:54:41,999 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 01:54:41,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 01:54:41,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 01:54:41,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 01:54:42,000 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 01:54:42,000 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 01:54:42,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 01:54:42,050 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 01:54:42,051 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 01:54:42,150 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 01:54:42,155 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 01:54:42,155 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-18 01:54:42,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 01:54:42 BoogieIcfgContainer [2022-03-18 01:54:42,157 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 01:54:42,158 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 01:54:42,158 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 01:54:42,163 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 01:54:42,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 01:54:41" (1/3) ... [2022-03-18 01:54:42,164 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@304ab786 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 01:54:42, skipping insertion in model container [2022-03-18 01:54:42,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:54:41" (2/3) ... [2022-03-18 01:54:42,164 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@304ab786 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 01:54:42, skipping insertion in model container [2022-03-18 01:54:42,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 01:54:42" (3/3) ... [2022-03-18 01:54:42,165 INFO L111 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_valuebound5.c [2022-03-18 01:54:42,169 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-18 01:54:42,169 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 01:54:42,202 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 01:54:42,208 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 [2022-03-18 01:54:42,208 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 01:54:42,219 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 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) [2022-03-18 01:54:42,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-18 01:54:42,225 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:54:42,226 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] [2022-03-18 01:54:42,226 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:54:42,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:54:42,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1768835633, now seen corresponding path program 1 times [2022-03-18 01:54:42,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:54:42,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1240211331] [2022-03-18 01:54:42,247 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:54:42,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1768835633, now seen corresponding path program 2 times [2022-03-18 01:54:42,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:54:42,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677279365] [2022-03-18 01:54:42,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:54:42,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:54:42,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:54:42,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:54:42,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:54:42,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 01:54:42,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:54:42,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 01:54:42,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:54:42,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-18 01:54:42,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:54:42,451 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 01:54:42,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:54:42,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677279365] [2022-03-18 01:54:42,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677279365] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:54:42,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:54:42,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 01:54:42,455 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:54:42,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1240211331] [2022-03-18 01:54:42,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1240211331] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:54:42,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:54:42,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 01:54:42,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670949421] [2022-03-18 01:54:42,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:54:42,460 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 01:54:42,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:54:42,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 01:54:42,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 01:54:42,481 INFO L87 Difference]: Start difference. First operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 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) [2022-03-18 01:54:42,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:54:42,565 INFO L93 Difference]: Finished difference Result 71 states and 110 transitions. [2022-03-18 01:54:42,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 01:54:42,568 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 [2022-03-18 01:54:42,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:54:42,574 INFO L225 Difference]: With dead ends: 71 [2022-03-18 01:54:42,576 INFO L226 Difference]: Without dead ends: 34 [2022-03-18 01:54:42,579 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 [2022-03-18 01:54:42,594 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, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 01:54:42,595 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 41 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 01:54:42,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-18 01:54:42,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-03-18 01:54:42,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 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) [2022-03-18 01:54:42,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2022-03-18 01:54:42,657 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 28 [2022-03-18 01:54:42,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:54:42,657 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2022-03-18 01:54:42,657 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) [2022-03-18 01:54:42,658 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2022-03-18 01:54:42,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-18 01:54:42,659 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:54:42,659 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] [2022-03-18 01:54:42,659 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 01:54:42,660 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:54:42,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:54:42,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1378913883, now seen corresponding path program 1 times [2022-03-18 01:54:42,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:54:42,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1718533612] [2022-03-18 01:54:42,662 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:54:42,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1378913883, now seen corresponding path program 2 times [2022-03-18 01:54:42,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:54:42,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151132561] [2022-03-18 01:54:42,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:54:42,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:54:42,701 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:54:42,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2088847269] [2022-03-18 01:54:42,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:54:42,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:54:42,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:54:42,709 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) [2022-03-18 01:54:42,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 01:54:42,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-18 01:54:42,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:54:42,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 01:54:42,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:54:42,932 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 01:54:42,932 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 01:54:42,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:54:42,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151132561] [2022-03-18 01:54:42,933 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:54:42,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088847269] [2022-03-18 01:54:42,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088847269] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:54:42,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:54:42,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 01:54:42,936 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:54:42,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1718533612] [2022-03-18 01:54:42,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1718533612] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:54:42,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:54:42,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 01:54:42,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789709733] [2022-03-18 01:54:42,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:54:42,950 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 01:54:42,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:54:42,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 01:54:42,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 01:54:42,951 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-18 01:54:43,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:54:43,012 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2022-03-18 01:54:43,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 01:54:43,012 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2022-03-18 01:54:43,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:54:43,013 INFO L225 Difference]: With dead ends: 45 [2022-03-18 01:54:43,014 INFO L226 Difference]: Without dead ends: 43 [2022-03-18 01:54:43,014 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 01:54:43,015 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 01:54:43,016 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 153 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 01:54:43,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-18 01:54:43,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2022-03-18 01:54:43,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 24 states have internal predecessors, (25), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-18 01:54:43,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2022-03-18 01:54:43,028 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 28 [2022-03-18 01:54:43,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:54:43,028 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2022-03-18 01:54:43,028 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-18 01:54:43,028 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2022-03-18 01:54:43,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-18 01:54:43,029 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:54:43,029 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] [2022-03-18 01:54:43,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 01:54:43,247 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:54:43,247 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:54:43,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:54:43,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1928335320, now seen corresponding path program 1 times [2022-03-18 01:54:43,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:54:43,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1341855512] [2022-03-18 01:54:43,249 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:54:43,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1928335320, now seen corresponding path program 2 times [2022-03-18 01:54:43,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:54:43,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158530881] [2022-03-18 01:54:43,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:54:43,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:54:43,271 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:54:43,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1223665102] [2022-03-18 01:54:43,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:54:43,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:54:43,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:54:43,273 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) [2022-03-18 01:54:43,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 01:54:43,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:54:43,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:54:43,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-18 01:54:43,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:54:43,499 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 01:54:43,499 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 01:54:43,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:54:43,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158530881] [2022-03-18 01:54:43,499 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:54:43,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223665102] [2022-03-18 01:54:43,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223665102] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:54:43,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:54:43,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 01:54:43,500 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:54:43,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1341855512] [2022-03-18 01:54:43,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1341855512] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:54:43,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:54:43,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 01:54:43,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507281705] [2022-03-18 01:54:43,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:54:43,501 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 01:54:43,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:54:43,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 01:54:43,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-03-18 01:54:43,502 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-18 01:54:43,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:54:43,611 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2022-03-18 01:54:43,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 01:54:43,612 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 33 [2022-03-18 01:54:43,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:54:43,613 INFO L225 Difference]: With dead ends: 57 [2022-03-18 01:54:43,613 INFO L226 Difference]: Without dead ends: 54 [2022-03-18 01:54:43,614 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-03-18 01:54:43,615 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 45 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 01:54:43,615 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 198 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 01:54:43,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-18 01:54:43,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2022-03-18 01:54:43,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 18 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-18 01:54:43,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 67 transitions. [2022-03-18 01:54:43,627 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 67 transitions. Word has length 33 [2022-03-18 01:54:43,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:54:43,627 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 67 transitions. [2022-03-18 01:54:43,628 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-18 01:54:43,628 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 67 transitions. [2022-03-18 01:54:43,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-18 01:54:43,629 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:54:43,629 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, 1, 1] [2022-03-18 01:54:43,649 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-18 01:54:43,843 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-18 01:54:43,844 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:54:43,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:54:43,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1297647068, now seen corresponding path program 1 times [2022-03-18 01:54:43,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:54:43,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [177670417] [2022-03-18 01:54:43,846 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:54:43,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1297647068, now seen corresponding path program 2 times [2022-03-18 01:54:43,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:54:43,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625457207] [2022-03-18 01:54:43,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:54:43,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:54:43,862 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:54:43,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1073547020] [2022-03-18 01:54:43,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:54:43,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:54:43,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:54:43,870 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) [2022-03-18 01:54:43,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 01:54:43,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:54:43,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:54:43,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-18 01:54:43,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:54:44,033 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-18 01:54:44,033 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 01:54:44,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:54:44,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625457207] [2022-03-18 01:54:44,033 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:54:44,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073547020] [2022-03-18 01:54:44,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073547020] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:54:44,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:54:44,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 01:54:44,039 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:54:44,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [177670417] [2022-03-18 01:54:44,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [177670417] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:54:44,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:54:44,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 01:54:44,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880292168] [2022-03-18 01:54:44,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:54:44,042 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 01:54:44,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:54:44,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 01:54:44,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-03-18 01:54:44,043 INFO L87 Difference]: Start difference. First operand 53 states and 67 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-18 01:54:44,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:54:44,165 INFO L93 Difference]: Finished difference Result 79 states and 105 transitions. [2022-03-18 01:54:44,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 01:54:44,165 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 40 [2022-03-18 01:54:44,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:54:44,170 INFO L225 Difference]: With dead ends: 79 [2022-03-18 01:54:44,170 INFO L226 Difference]: Without dead ends: 77 [2022-03-18 01:54:44,171 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-03-18 01:54:44,173 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 24 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 01:54:44,174 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 207 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 01:54:44,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-18 01:54:44,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 70. [2022-03-18 01:54:44,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 40 states have internal predecessors, (44), 25 states have call successors, (25), 7 states have call predecessors, (25), 6 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-18 01:54:44,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 92 transitions. [2022-03-18 01:54:44,188 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 92 transitions. Word has length 40 [2022-03-18 01:54:44,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:54:44,189 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 92 transitions. [2022-03-18 01:54:44,189 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-18 01:54:44,189 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 92 transitions. [2022-03-18 01:54:44,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-18 01:54:44,190 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:54:44,190 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:54:44,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 01:54:44,411 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:54:44,412 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:54:44,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:54:44,413 INFO L85 PathProgramCache]: Analyzing trace with hash -391974204, now seen corresponding path program 1 times [2022-03-18 01:54:44,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:54:44,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [515711761] [2022-03-18 01:54:44,413 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:54:44,413 INFO L85 PathProgramCache]: Analyzing trace with hash -391974204, now seen corresponding path program 2 times [2022-03-18 01:54:44,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:54:44,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039130332] [2022-03-18 01:54:44,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:54:44,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:54:44,425 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:54:44,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1699712613] [2022-03-18 01:54:44,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:54:44,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:54:44,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:54:44,428 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) [2022-03-18 01:54:44,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 01:54:44,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:54:44,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:54:44,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 01:54:44,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:54:44,567 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-18 01:54:44,567 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 01:54:44,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:54:44,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039130332] [2022-03-18 01:54:44,568 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:54:44,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699712613] [2022-03-18 01:54:44,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699712613] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:54:44,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:54:44,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 01:54:44,569 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:54:44,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [515711761] [2022-03-18 01:54:44,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [515711761] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:54:44,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:54:44,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 01:54:44,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22767032] [2022-03-18 01:54:44,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:54:44,569 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 01:54:44,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:54:44,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 01:54:44,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-03-18 01:54:44,570 INFO L87 Difference]: Start difference. First operand 70 states and 92 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-18 01:54:44,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:54:44,645 INFO L93 Difference]: Finished difference Result 76 states and 97 transitions. [2022-03-18 01:54:44,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 01:54:44,652 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 50 [2022-03-18 01:54:44,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:54:44,654 INFO L225 Difference]: With dead ends: 76 [2022-03-18 01:54:44,654 INFO L226 Difference]: Without dead ends: 74 [2022-03-18 01:54:44,655 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-18 01:54:44,655 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 16 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 01:54:44,656 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 197 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 01:54:44,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-18 01:54:44,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-03-18 01:54:44,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 41 states have (on average 1.146341463414634) internal successors, (47), 43 states have internal predecessors, (47), 25 states have call successors, (25), 8 states have call predecessors, (25), 7 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-18 01:54:44,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 95 transitions. [2022-03-18 01:54:44,670 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 95 transitions. Word has length 50 [2022-03-18 01:54:44,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:54:44,671 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 95 transitions. [2022-03-18 01:54:44,671 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-18 01:54:44,671 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 95 transitions. [2022-03-18 01:54:44,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-18 01:54:44,672 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:54:44,672 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] [2022-03-18 01:54:44,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 01:54:44,885 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:54:44,885 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:54:44,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:54:44,886 INFO L85 PathProgramCache]: Analyzing trace with hash 991781023, now seen corresponding path program 1 times [2022-03-18 01:54:44,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:54:44,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1478382305] [2022-03-18 01:54:44,886 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:54:44,886 INFO L85 PathProgramCache]: Analyzing trace with hash 991781023, now seen corresponding path program 2 times [2022-03-18 01:54:44,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:54:44,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614122099] [2022-03-18 01:54:44,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:54:44,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:54:44,908 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:54:44,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1961066816] [2022-03-18 01:54:44,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:54:44,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:54:44,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:54:44,919 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) [2022-03-18 01:54:44,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 01:54:44,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:54:44,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:54:44,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 01:54:44,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:54:45,096 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-18 01:54:45,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:54:45,263 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-18 01:54:45,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:54:45,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614122099] [2022-03-18 01:54:45,264 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:54:45,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961066816] [2022-03-18 01:54:45,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961066816] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:54:45,264 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 01:54:45,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-03-18 01:54:45,265 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:54:45,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1478382305] [2022-03-18 01:54:45,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1478382305] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:54:45,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:54:45,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 01:54:45,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427923326] [2022-03-18 01:54:45,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:54:45,266 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 01:54:45,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:54:45,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 01:54:45,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-03-18 01:54:45,266 INFO L87 Difference]: Start difference. First operand 74 states and 95 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-18 01:54:45,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:54:45,367 INFO L93 Difference]: Finished difference Result 80 states and 100 transitions. [2022-03-18 01:54:45,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 01:54:45,367 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2022-03-18 01:54:45,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:54:45,370 INFO L225 Difference]: With dead ends: 80 [2022-03-18 01:54:45,370 INFO L226 Difference]: Without dead ends: 78 [2022-03-18 01:54:45,370 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-03-18 01:54:45,372 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 18 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 01:54:45,373 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 144 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 01:54:45,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-03-18 01:54:45,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-03-18 01:54:45,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 46 states have internal predecessors, (50), 25 states have call successors, (25), 9 states have call predecessors, (25), 8 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-18 01:54:45,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 98 transitions. [2022-03-18 01:54:45,398 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 98 transitions. Word has length 56 [2022-03-18 01:54:45,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:54:45,398 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 98 transitions. [2022-03-18 01:54:45,398 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-18 01:54:45,399 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 98 transitions. [2022-03-18 01:54:45,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-18 01:54:45,403 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:54:45,404 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:54:45,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 01:54:45,619 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:54:45,620 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:54:45,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:54:45,620 INFO L85 PathProgramCache]: Analyzing trace with hash -2096667334, now seen corresponding path program 1 times [2022-03-18 01:54:45,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:54:45,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [819665051] [2022-03-18 01:54:45,621 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:54:45,621 INFO L85 PathProgramCache]: Analyzing trace with hash -2096667334, now seen corresponding path program 2 times [2022-03-18 01:54:45,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:54:45,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160149408] [2022-03-18 01:54:45,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:54:45,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:54:45,635 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:54:45,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1800365379] [2022-03-18 01:54:45,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:54:45,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:54:45,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:54:45,636 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:54:45,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 01:54:45,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:54:45,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:54:45,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-18 01:54:45,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:54:45,871 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-03-18 01:54:45,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:54:46,022 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-03-18 01:54:46,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:54:46,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160149408] [2022-03-18 01:54:46,023 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:54:46,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800365379] [2022-03-18 01:54:46,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800365379] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:54:46,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 01:54:46,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-03-18 01:54:46,024 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:54:46,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [819665051] [2022-03-18 01:54:46,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [819665051] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:54:46,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:54:46,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-18 01:54:46,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142640055] [2022-03-18 01:54:46,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:54:46,024 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-18 01:54:46,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:54:46,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-18 01:54:46,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-18 01:54:46,025 INFO L87 Difference]: Start difference. First operand 78 states and 98 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-18 01:54:46,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:54:46,141 INFO L93 Difference]: Finished difference Result 111 states and 142 transitions. [2022-03-18 01:54:46,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 01:54:46,142 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 63 [2022-03-18 01:54:46,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:54:46,146 INFO L225 Difference]: With dead ends: 111 [2022-03-18 01:54:46,146 INFO L226 Difference]: Without dead ends: 108 [2022-03-18 01:54:46,147 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-18 01:54:46,147 INFO L912 BasicCegarLoop]: 57 mSDtfsCounter, 20 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 01:54:46,147 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 238 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 01:54:46,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-03-18 01:54:46,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 103. [2022-03-18 01:54:46,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 60 states have internal predecessors, (66), 34 states have call successors, (34), 11 states have call predecessors, (34), 10 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2022-03-18 01:54:46,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 132 transitions. [2022-03-18 01:54:46,178 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 132 transitions. Word has length 63 [2022-03-18 01:54:46,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:54:46,178 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 132 transitions. [2022-03-18 01:54:46,179 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-18 01:54:46,179 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 132 transitions. [2022-03-18 01:54:46,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-18 01:54:46,182 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:54:46,182 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:54:46,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-18 01:54:46,403 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:54:46,403 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:54:46,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:54:46,404 INFO L85 PathProgramCache]: Analyzing trace with hash -2105983492, now seen corresponding path program 1 times [2022-03-18 01:54:46,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:54:46,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [624353984] [2022-03-18 01:54:46,404 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:54:46,404 INFO L85 PathProgramCache]: Analyzing trace with hash -2105983492, now seen corresponding path program 2 times [2022-03-18 01:54:46,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:54:46,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879738339] [2022-03-18 01:54:46,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:54:46,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:54:46,416 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:54:46,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [101051570] [2022-03-18 01:54:46,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:54:46,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:54:46,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:54:46,419 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:54:46,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 01:54:46,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:54:46,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:54:46,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-18 01:54:46,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:54:47,341 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 56 proven. 35 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2022-03-18 01:54:47,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:54:50,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:54:50,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879738339] [2022-03-18 01:54:50,694 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:54:50,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101051570] [2022-03-18 01:54:50,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101051570] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:54:50,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 01:54:50,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-03-18 01:54:50,695 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:54:50,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [624353984] [2022-03-18 01:54:50,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [624353984] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:54:50,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:54:50,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-18 01:54:50,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510322018] [2022-03-18 01:54:50,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:54:50,696 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-18 01:54:50,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:54:50,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-18 01:54:50,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=344, Unknown=1, NotChecked=0, Total=462 [2022-03-18 01:54:50,697 INFO L87 Difference]: Start difference. First operand 103 states and 132 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-03-18 01:54:51,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:54:51,519 INFO L93 Difference]: Finished difference Result 147 states and 191 transitions. [2022-03-18 01:54:51,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-18 01:54:51,520 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 86 [2022-03-18 01:54:51,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:54:51,521 INFO L225 Difference]: With dead ends: 147 [2022-03-18 01:54:51,521 INFO L226 Difference]: Without dead ends: 144 [2022-03-18 01:54:51,522 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=140, Invalid=459, Unknown=1, NotChecked=0, Total=600 [2022-03-18 01:54:51,522 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 32 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 01:54:51,523 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 262 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 01:54:51,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-03-18 01:54:51,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 139. [2022-03-18 01:54:51,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 78 states have (on average 1.141025641025641) internal successors, (89), 80 states have internal predecessors, (89), 47 states have call successors, (47), 14 states have call predecessors, (47), 13 states have return successors, (45), 44 states have call predecessors, (45), 45 states have call successors, (45) [2022-03-18 01:54:51,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 181 transitions. [2022-03-18 01:54:51,549 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 181 transitions. Word has length 86 [2022-03-18 01:54:51,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:54:51,549 INFO L478 AbstractCegarLoop]: Abstraction has 139 states and 181 transitions. [2022-03-18 01:54:51,550 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-03-18 01:54:51,550 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 181 transitions. [2022-03-18 01:54:51,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-18 01:54:51,551 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:54:51,551 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:54:51,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-18 01:54:51,767 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:54:51,768 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:54:51,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:54:51,768 INFO L85 PathProgramCache]: Analyzing trace with hash -895340852, now seen corresponding path program 3 times [2022-03-18 01:54:51,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:54:51,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [264738113] [2022-03-18 01:54:51,768 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:54:51,769 INFO L85 PathProgramCache]: Analyzing trace with hash -895340852, now seen corresponding path program 4 times [2022-03-18 01:54:51,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:54:51,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501329939] [2022-03-18 01:54:51,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:54:51,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:54:51,788 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:54:51,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1735380969] [2022-03-18 01:54:51,789 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 01:54:51,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:54:51,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:54:51,791 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:54:51,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-18 01:54:51,840 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 01:54:51,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:54:51,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 01:54:51,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:54:51,984 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-03-18 01:54:51,984 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 01:54:51,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:54:51,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501329939] [2022-03-18 01:54:51,985 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:54:51,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735380969] [2022-03-18 01:54:51,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735380969] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:54:51,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:54:51,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 01:54:51,985 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:54:51,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [264738113] [2022-03-18 01:54:51,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [264738113] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:54:51,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:54:51,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 01:54:51,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650015422] [2022-03-18 01:54:51,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:54:51,986 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 01:54:51,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:54:51,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 01:54:51,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-18 01:54:51,987 INFO L87 Difference]: Start difference. First operand 139 states and 181 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 4 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-03-18 01:54:52,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:54:52,042 INFO L93 Difference]: Finished difference Result 189 states and 243 transitions. [2022-03-18 01:54:52,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 01:54:52,047 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 4 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 93 [2022-03-18 01:54:52,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:54:52,049 INFO L225 Difference]: With dead ends: 189 [2022-03-18 01:54:52,049 INFO L226 Difference]: Without dead ends: 125 [2022-03-18 01:54:52,052 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-18 01:54:52,054 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 5 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 01:54:52,054 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 156 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 01:54:52,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-03-18 01:54:52,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 120. [2022-03-18 01:54:52,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 68 states have (on average 1.1176470588235294) internal successors, (76), 69 states have internal predecessors, (76), 39 states have call successors, (39), 13 states have call predecessors, (39), 12 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-03-18 01:54:52,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 152 transitions. [2022-03-18 01:54:52,080 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 152 transitions. Word has length 93 [2022-03-18 01:54:52,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:54:52,081 INFO L478 AbstractCegarLoop]: Abstraction has 120 states and 152 transitions. [2022-03-18 01:54:52,081 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 4 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-03-18 01:54:52,081 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 152 transitions. [2022-03-18 01:54:52,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-03-18 01:54:52,086 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:54:52,087 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:54:52,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-18 01:54:52,299 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-18 01:54:52,300 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:54:52,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:54:52,300 INFO L85 PathProgramCache]: Analyzing trace with hash -39671046, now seen corresponding path program 3 times [2022-03-18 01:54:52,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:54:52,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1935917980] [2022-03-18 01:54:52,300 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:54:52,300 INFO L85 PathProgramCache]: Analyzing trace with hash -39671046, now seen corresponding path program 4 times [2022-03-18 01:54:52,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:54:52,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149373246] [2022-03-18 01:54:52,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:54:52,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:54:52,314 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:54:52,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1090870418] [2022-03-18 01:54:52,314 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 01:54:52,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:54:52,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:54:52,317 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:54:52,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-18 01:54:52,366 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 01:54:52,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:54:52,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-18 01:54:52,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:54:53,013 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 28 proven. 26 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2022-03-18 01:54:53,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:54:53,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:54:53,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149373246] [2022-03-18 01:54:53,499 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:54:53,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090870418] [2022-03-18 01:54:53,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090870418] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:54:53,500 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 01:54:53,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-03-18 01:54:53,500 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:54:53,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1935917980] [2022-03-18 01:54:53,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1935917980] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:54:53,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:54:53,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-18 01:54:53,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168889485] [2022-03-18 01:54:53,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:54:53,501 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-18 01:54:53,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:54:53,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-18 01:54:53,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2022-03-18 01:54:53,502 INFO L87 Difference]: Start difference. First operand 120 states and 152 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2022-03-18 01:54:53,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:54:53,910 INFO L93 Difference]: Finished difference Result 164 states and 211 transitions. [2022-03-18 01:54:53,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-18 01:54:53,910 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) Word has length 109 [2022-03-18 01:54:53,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:54:53,912 INFO L225 Difference]: With dead ends: 164 [2022-03-18 01:54:53,912 INFO L226 Difference]: Without dead ends: 161 [2022-03-18 01:54:53,912 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 164 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2022-03-18 01:54:53,913 INFO L912 BasicCegarLoop]: 62 mSDtfsCounter, 42 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 01:54:53,913 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 381 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 01:54:53,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-03-18 01:54:53,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 156. [2022-03-18 01:54:53,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 88 states have (on average 1.125) internal successors, (99), 89 states have internal predecessors, (99), 52 states have call successors, (52), 16 states have call predecessors, (52), 15 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2022-03-18 01:54:53,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 201 transitions. [2022-03-18 01:54:53,940 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 201 transitions. Word has length 109 [2022-03-18 01:54:53,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:54:53,940 INFO L478 AbstractCegarLoop]: Abstraction has 156 states and 201 transitions. [2022-03-18 01:54:53,941 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2022-03-18 01:54:53,941 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 201 transitions. [2022-03-18 01:54:53,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-18 01:54:53,942 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:54:53,942 INFO L500 BasicCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:54:53,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-18 01:54:54,159 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-18 01:54:54,159 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:54:54,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:54:54,160 INFO L85 PathProgramCache]: Analyzing trace with hash 800180238, now seen corresponding path program 5 times [2022-03-18 01:54:54,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:54:54,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1236622292] [2022-03-18 01:54:54,160 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:54:54,160 INFO L85 PathProgramCache]: Analyzing trace with hash 800180238, now seen corresponding path program 6 times [2022-03-18 01:54:54,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:54:54,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274481728] [2022-03-18 01:54:54,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:54:54,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:54:54,179 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:54:54,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [222900981] [2022-03-18 01:54:54,179 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 01:54:54,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:54:54,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:54:54,188 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:54:54,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-18 01:54:54,241 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 01:54:54,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:54:54,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-18 01:54:54,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:54:54,499 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 106 proven. 23 refuted. 0 times theorem prover too weak. 359 trivial. 0 not checked. [2022-03-18 01:54:54,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:54:54,772 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 114 proven. 5 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2022-03-18 01:54:54,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:54:54,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274481728] [2022-03-18 01:54:54,772 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:54:54,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222900981] [2022-03-18 01:54:54,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222900981] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:54:54,773 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 01:54:54,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2022-03-18 01:54:54,773 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:54:54,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1236622292] [2022-03-18 01:54:54,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1236622292] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:54:54,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:54:54,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 01:54:54,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442547829] [2022-03-18 01:54:54,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:54:54,774 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 01:54:54,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:54:54,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 01:54:54,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-18 01:54:54,774 INFO L87 Difference]: Start difference. First operand 156 states and 201 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 4 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2022-03-18 01:54:54,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:54:54,966 INFO L93 Difference]: Finished difference Result 165 states and 208 transitions. [2022-03-18 01:54:54,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 01:54:54,967 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 4 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) Word has length 116 [2022-03-18 01:54:54,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:54:54,967 INFO L225 Difference]: With dead ends: 165 [2022-03-18 01:54:54,967 INFO L226 Difference]: Without dead ends: 0 [2022-03-18 01:54:54,968 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 221 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-03-18 01:54:54,968 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 23 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 01:54:54,969 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 181 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 01:54:54,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-18 01:54:54,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-18 01:54:54,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-18 01:54:54,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-18 01:54:54,970 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 116 [2022-03-18 01:54:54,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:54:54,970 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-18 01:54:54,970 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 4 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2022-03-18 01:54:54,970 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-18 01:54:54,970 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-18 01:54:54,972 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-18 01:54:54,997 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-03-18 01:54:55,197 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-18 01:54:55,199 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-18 01:54:58,634 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 8) no Hoare annotation was computed. [2022-03-18 01:54:58,634 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 8) no Hoare annotation was computed. [2022-03-18 01:54:58,634 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 8) no Hoare annotation was computed. [2022-03-18 01:54:58,634 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 11 13) the Hoare annotation is: true [2022-03-18 01:54:58,634 INFO L878 garLoopResultBuilder]: At program point L12(line 12) the Hoare annotation is: (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|) [2022-03-18 01:54:58,634 INFO L878 garLoopResultBuilder]: At program point L12-2(lines 11 13) the Hoare annotation is: (and (not (= |assume_abort_if_not_#in~cond| 0)) (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)) [2022-03-18 01:54:58,634 INFO L878 garLoopResultBuilder]: At program point assume_abort_if_notEXIT(lines 11 13) the Hoare annotation is: (and (not (= |assume_abort_if_not_#in~cond| 0)) (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)) [2022-03-18 01:54:58,634 INFO L885 garLoopResultBuilder]: At program point L64(line 64) the Hoare annotation is: true [2022-03-18 01:54:58,634 INFO L878 garLoopResultBuilder]: At program point L31(line 31) the Hoare annotation is: (and (<= 0 main_~x~0) (<= main_~x~0 5) (<= 1 main_~y~0) (<= main_~y~0 5)) [2022-03-18 01:54:58,634 INFO L878 garLoopResultBuilder]: At program point L29(line 29) the Hoare annotation is: (and (<= 0 main_~x~0) (<= main_~x~0 5)) [2022-03-18 01:54:58,635 INFO L878 garLoopResultBuilder]: At program point L29-1(line 29) the Hoare annotation is: (and (<= 0 main_~y~0) (<= 0 main_~x~0) (<= main_~x~0 5) (<= main_~y~0 5)) [2022-03-18 01:54:58,635 INFO L885 garLoopResultBuilder]: At program point L27(line 27) the Hoare annotation is: true [2022-03-18 01:54:58,635 INFO L878 garLoopResultBuilder]: At program point L27-1(line 27) the Hoare annotation is: (and (<= 0 main_~x~0) (<= main_~x~0 5)) [2022-03-18 01:54:58,635 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 22 66) the Hoare annotation is: true [2022-03-18 01:54:58,635 INFO L878 garLoopResultBuilder]: At program point L50(lines 47 59) the Hoare annotation is: (let ((.cse0 (* main_~a~0 main_~y~0))) (and (= (+ (* main_~q~0 main_~y~0) main_~b~0 main_~r~0) (+ main_~x~0 .cse0)) (<= 0 main_~x~0) (<= 1 main_~r~0) (<= main_~x~0 5) (<= 1 main_~y~0) (= main_~b~0 .cse0) (<= main_~y~0 5))) [2022-03-18 01:54:58,635 INFO L878 garLoopResultBuilder]: At program point L48(line 48) the Hoare annotation is: (let ((.cse0 (* main_~a~0 main_~y~0))) (and (= (+ (* main_~q~0 main_~y~0) main_~b~0 main_~r~0) (+ main_~x~0 .cse0)) (<= 0 main_~x~0) (<= 1 main_~r~0) (<= main_~x~0 5) (<= 1 main_~y~0) (= main_~b~0 .cse0) (<= main_~y~0 5))) [2022-03-18 01:54:58,635 INFO L878 garLoopResultBuilder]: At program point L48-1(line 48) the Hoare annotation is: (let ((.cse0 (* main_~a~0 main_~y~0))) (and (= (+ (* main_~q~0 main_~y~0) main_~b~0 main_~r~0) (+ main_~x~0 .cse0)) (<= 0 main_~x~0) (<= 1 main_~r~0) (<= main_~x~0 5) (<= 1 main_~y~0) (= main_~b~0 .cse0) (<= main_~y~0 5))) [2022-03-18 01:54:58,635 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 22 66) the Hoare annotation is: true [2022-03-18 01:54:58,635 INFO L878 garLoopResultBuilder]: At program point L40(lines 38 62) the Hoare annotation is: (let ((.cse3 (* main_~a~0 main_~y~0))) (let ((.cse0 (<= 1 main_~y~0)) (.cse1 (= main_~b~0 .cse3)) (.cse2 (<= main_~y~0 5))) (or (and (< main_~r~0 main_~y~0) (<= main_~b~0 main_~y~0) (= main_~x~0 (+ main_~y~0 main_~r~0)) (= main_~q~0 1) .cse0 .cse1 .cse2) (and (= (+ (* main_~q~0 main_~y~0) main_~b~0 main_~r~0) (+ main_~x~0 .cse3)) (<= 0 main_~x~0) (<= main_~x~0 5) .cse0 .cse1 .cse2)))) [2022-03-18 01:54:58,635 INFO L878 garLoopResultBuilder]: At program point L38-2(lines 38 62) the Hoare annotation is: (let ((.cse3 (* main_~a~0 main_~y~0))) (let ((.cse0 (<= 1 main_~y~0)) (.cse1 (= main_~b~0 .cse3)) (.cse2 (<= main_~y~0 5))) (or (and (< main_~r~0 main_~y~0) (= main_~b~0 main_~y~0) (= main_~x~0 (+ main_~y~0 main_~r~0)) (= main_~q~0 1) .cse0 .cse1 .cse2) (and (= (+ (* main_~q~0 main_~y~0) main_~b~0 main_~r~0) (+ main_~x~0 .cse3)) (<= 0 main_~x~0) (<= main_~x~0 5) .cse0 .cse1 .cse2)))) [2022-03-18 01:54:58,635 INFO L878 garLoopResultBuilder]: At program point L38-3(lines 38 62) the Hoare annotation is: (let ((.cse4 (* main_~a~0 main_~y~0))) (let ((.cse0 (<= 1 main_~y~0)) (.cse3 (* main_~q~0 main_~y~0)) (.cse1 (= main_~b~0 .cse4)) (.cse2 (<= main_~y~0 5))) (or (and (= main_~x~0 (+ main_~y~0 main_~r~0)) (= main_~q~0 1) .cse0 .cse1 .cse2) (and (< main_~r~0 main_~y~0) (= (+ .cse3 main_~b~0 main_~r~0) (+ main_~x~0 .cse4)) (<= 0 main_~x~0) (<= main_~x~0 5) .cse0 .cse1 .cse2) (and (= main_~x~0 main_~r~0) (= main_~q~0 0) .cse0 .cse2) (and (= (+ .cse3 main_~r~0) main_~x~0) (< main_~x~0 (* .cse3 2)) (= main_~x~0 (+ main_~b~0 main_~r~0)) (<= (* 2 (* main_~y~0 (div (* (- 1) main_~q~0) (- 2)))) main_~x~0) .cse1 (<= (* (div (* (- 1) main_~a~0) (- 2)) main_~y~0) main_~y~0) .cse2)))) [2022-03-18 01:54:58,635 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 22 66) the Hoare annotation is: true [2022-03-18 01:54:58,636 INFO L878 garLoopResultBuilder]: At program point L55(line 55) the Hoare annotation is: (let ((.cse0 (* main_~a~0 main_~y~0))) (and (= (+ (* main_~q~0 main_~y~0) main_~b~0 main_~r~0) (+ main_~x~0 .cse0)) (<= (* 2 .cse0) main_~r~0) (<= 0 main_~x~0) (<= 1 main_~r~0) (<= main_~x~0 5) (<= 1 main_~y~0) (= main_~b~0 .cse0) (<= main_~y~0 5))) [2022-03-18 01:54:58,636 INFO L878 garLoopResultBuilder]: At program point L55-1(line 55) the Hoare annotation is: (let ((.cse0 (* main_~a~0 main_~y~0))) (and (= (+ (* main_~q~0 main_~y~0) main_~b~0 main_~r~0) (+ main_~x~0 .cse0)) (<= (* 2 .cse0) main_~r~0) (<= 0 main_~x~0) (<= 1 main_~r~0) (<= main_~x~0 5) (<= 1 main_~y~0) (= main_~b~0 .cse0) (<= main_~y~0 5))) [2022-03-18 01:54:58,636 INFO L878 garLoopResultBuilder]: At program point L49(line 49) the Hoare annotation is: (let ((.cse0 (* main_~a~0 main_~y~0))) (and (= (+ (* main_~q~0 main_~y~0) main_~b~0 main_~r~0) (+ main_~x~0 .cse0)) (<= 0 main_~x~0) (<= 1 main_~r~0) (<= main_~x~0 5) (<= 1 main_~y~0) (= main_~b~0 .cse0) (<= main_~y~0 5))) [2022-03-18 01:54:58,636 INFO L878 garLoopResultBuilder]: At program point L47-2(lines 47 59) the Hoare annotation is: (let ((.cse0 (* main_~a~0 main_~y~0))) (and (= (+ (* main_~q~0 main_~y~0) main_~b~0 main_~r~0) (+ main_~x~0 .cse0)) (<= 0 main_~x~0) (<= 1 main_~r~0) (<= main_~x~0 5) (<= 1 main_~y~0) (= main_~b~0 .cse0) (<= main_~y~0 5))) [2022-03-18 01:54:58,636 INFO L878 garLoopResultBuilder]: At program point L47-3(lines 47 59) the Hoare annotation is: (let ((.cse0 (* main_~a~0 main_~y~0))) (let ((.cse1 (<= 1 main_~r~0)) (.cse2 (= main_~b~0 .cse0)) (.cse3 (<= main_~y~0 5))) (or (and (= (+ (* main_~q~0 main_~y~0) main_~b~0 main_~r~0) (+ main_~x~0 .cse0)) (<= 0 main_~x~0) .cse1 (<= main_~x~0 5) (<= 1 main_~y~0) .cse2 .cse3) (and (= main_~x~0 main_~r~0) (< main_~r~0 (* main_~b~0 2)) .cse1 (= main_~b~0 main_~y~0) (= main_~q~0 0) .cse2 .cse3)))) [2022-03-18 01:54:58,636 INFO L878 garLoopResultBuilder]: At program point L39(line 39) the Hoare annotation is: (let ((.cse3 (* main_~a~0 main_~y~0))) (let ((.cse0 (<= 1 main_~y~0)) (.cse1 (= main_~b~0 .cse3)) (.cse2 (<= main_~y~0 5))) (or (and (< main_~r~0 main_~y~0) (= main_~b~0 main_~y~0) (= main_~x~0 (+ main_~y~0 main_~r~0)) (= main_~q~0 1) .cse0 .cse1 .cse2) (and (= (+ (* main_~q~0 main_~y~0) main_~b~0 main_~r~0) (+ main_~x~0 .cse3)) (<= 0 main_~x~0) (<= main_~x~0 5) .cse0 .cse1 .cse2)))) [2022-03-18 01:54:58,636 INFO L878 garLoopResultBuilder]: At program point L39-1(line 39) the Hoare annotation is: (let ((.cse3 (* main_~a~0 main_~y~0))) (let ((.cse0 (<= 1 main_~y~0)) (.cse1 (= main_~b~0 .cse3)) (.cse2 (<= main_~y~0 5))) (or (and (< main_~r~0 main_~y~0) (<= main_~b~0 main_~y~0) (= main_~x~0 (+ main_~y~0 main_~r~0)) (= main_~q~0 1) .cse0 .cse1 .cse2) (and (= (+ (* main_~q~0 main_~y~0) main_~b~0 main_~r~0) (+ main_~x~0 .cse3)) (<= 0 main_~x~0) (<= main_~x~0 5) .cse0 .cse1 .cse2)))) [2022-03-18 01:54:58,636 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-03-18 01:54:58,636 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-03-18 01:54:58,636 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-03-18 01:54:58,637 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-03-18 01:54:58,637 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-18 01:54:58,637 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-18 01:54:58,637 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-03-18 01:54:58,637 INFO L878 garLoopResultBuilder]: At program point L16(lines 16 17) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-03-18 01:54:58,637 INFO L878 garLoopResultBuilder]: At program point L15(lines 15 18) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-03-18 01:54:58,637 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2022-03-18 01:54:58,637 INFO L878 garLoopResultBuilder]: At program point L15-2(lines 14 20) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-03-18 01:54:58,637 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 14 20) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-03-18 01:54:58,637 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-03-18 01:54:58,639 INFO L718 BasicCegarLoop]: Path program histogram: [6, 4, 2, 2, 2, 2, 2, 2] [2022-03-18 01:54:58,640 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-18 01:54:58,653 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 01:54:58 BoogieIcfgContainer [2022-03-18 01:54:58,653 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-18 01:54:58,655 INFO L158 Benchmark]: Toolchain (without parser) took 16975.87ms. Allocated memory was 176.2MB in the beginning and 297.8MB in the end (delta: 121.6MB). Free memory was 119.2MB in the beginning and 246.6MB in the end (delta: -127.4MB). Peak memory consumption was 117.9MB. Max. memory is 8.0GB. [2022-03-18 01:54:58,655 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 176.2MB. Free memory is still 135.9MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-18 01:54:58,655 INFO L158 Benchmark]: CACSL2BoogieTranslator took 216.54ms. Allocated memory was 176.2MB in the beginning and 247.5MB in the end (delta: 71.3MB). Free memory was 119.1MB in the beginning and 220.8MB in the end (delta: -101.7MB). Peak memory consumption was 9.9MB. Max. memory is 8.0GB. [2022-03-18 01:54:58,656 INFO L158 Benchmark]: Boogie Preprocessor took 29.16ms. Allocated memory is still 247.5MB. Free memory was 220.8MB in the beginning and 219.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-18 01:54:58,656 INFO L158 Benchmark]: RCFGBuilder took 222.82ms. Allocated memory is still 247.5MB. Free memory was 219.2MB in the beginning and 207.2MB in the end (delta: 12.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-18 01:54:58,656 INFO L158 Benchmark]: TraceAbstraction took 16495.16ms. Allocated memory was 247.5MB in the beginning and 297.8MB in the end (delta: 50.3MB). Free memory was 206.6MB in the beginning and 246.6MB in the end (delta: -40.0MB). Peak memory consumption was 133.6MB. Max. memory is 8.0GB. [2022-03-18 01:54:58,658 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 176.2MB. Free memory is still 135.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 216.54ms. Allocated memory was 176.2MB in the beginning and 247.5MB in the end (delta: 71.3MB). Free memory was 119.1MB in the beginning and 220.8MB in the end (delta: -101.7MB). Peak memory consumption was 9.9MB. Max. memory is 8.0GB. * Boogie Preprocessor took 29.16ms. Allocated memory is still 247.5MB. Free memory was 220.8MB in the beginning and 219.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 222.82ms. Allocated memory is still 247.5MB. Free memory was 219.2MB in the beginning and 207.2MB in the end (delta: 12.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 16495.16ms. Allocated memory was 247.5MB in the beginning and 297.8MB in the end (delta: 50.3MB). Free memory was 206.6MB in the beginning and 246.6MB in the end (delta: -40.0MB). Peak memory consumption was 133.6MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 42 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 16.4s, OverallIterations: 11, TraceHistogramMax: 16, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 2.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 3.4s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 325 SdHoareTripleChecker+Valid, 1.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 252 mSDsluCounter, 2158 SdHoareTripleChecker+Invalid, 1.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1699 mSDsCounter, 205 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1549 IncrementalHoareTripleChecker+Invalid, 1754 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 205 mSolverCounterUnsat, 459 mSDtfsCounter, 1549 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1066 GetRequests, 946 SyntacticMatches, 9 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 3.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=156occurred in iteration=10, InterpolantAutomatonStates: 90, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 11 MinimizatonAttempts, 31 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 39 LocationsWithAnnotation, 517 PreInvPairs, 757 NumberOfFragments, 759 HoareAnnotationTreeSize, 517 FomulaSimplifications, 414 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 39 FomulaSimplificationsInter, 10952 FormulaSimplificationTreeSizeReductionInter, 3.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 47]: Loop Invariant Derived loop invariant: (((((q * y + b + r == x + a * y && 0 <= x) && 1 <= r) && x <= 5) && 1 <= y) && b == a * y) && y <= 5 - InvariantResult [Line: 38]: Loop Invariant Derived loop invariant: ((((((r < y && b == y) && x == y + r) && q == 1) && 1 <= y) && b == a * y) && y <= 5) || (((((q * y + b + r == x + a * y && 0 <= x) && x <= 5) && 1 <= y) && b == a * y) && y <= 5) - ProcedureContractResult [Line: 11]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not: !(\old(cond) == 0) && cond == \old(cond) - ProcedureContractResult [Line: 22]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 14]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: \old(cond) == cond || !(1 <= \old(cond)) RESULT: Ultimate proved your program to be correct! [2022-03-18 01:54:58,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...