/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench/cohencu-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-19 23:31:02,941 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 23:31:02,942 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 23:31:02,972 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-19 23:31:02,972 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-19 23:31:02,974 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-19 23:31:02,979 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-19 23:31:02,982 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-19 23:31:02,983 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-19 23:31:02,986 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-19 23:31:02,987 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-19 23:31:02,988 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-19 23:31:02,989 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-19 23:31:02,990 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-19 23:31:02,991 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-19 23:31:02,992 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-19 23:31:02,992 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-19 23:31:02,993 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-19 23:31:02,996 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-19 23:31:03,000 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-19 23:31:03,001 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-19 23:31:03,002 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-19 23:31:03,002 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-19 23:31:03,003 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-19 23:31:03,004 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-19 23:31:03,009 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-19 23:31:03,009 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-19 23:31:03,009 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-19 23:31:03,010 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-19 23:31:03,010 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-19 23:31:03,011 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-19 23:31:03,011 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-19 23:31:03,012 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-19 23:31:03,013 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-19 23:31:03,013 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-19 23:31:03,014 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-19 23:31:03,014 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-19 23:31:03,014 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-19 23:31:03,014 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-19 23:31:03,014 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 23:31:03,015 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 23:31:03,016 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 23:31:03,017 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-03-19 23:31:03,039 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 23:31:03,039 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 23:31:03,039 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-19 23:31:03,039 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-19 23:31:03,040 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-19 23:31:03,040 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-19 23:31:03,040 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-19 23:31:03,040 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-19 23:31:03,041 INFO L138 SettingsManager]: * Use SBE=true [2022-03-19 23:31:03,041 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 23:31:03,041 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-19 23:31:03,041 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 23:31:03,041 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-19 23:31:03,041 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 23:31:03,041 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 23:31:03,041 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 23:31:03,041 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 23:31:03,042 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-19 23:31:03,042 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 23:31:03,042 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 23:31:03,042 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 23:31:03,042 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 23:31:03,042 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 23:31:03,042 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 23:31:03,042 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 23:31:03,042 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 23:31:03,043 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-19 23:31:03,043 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-19 23:31:03,043 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-19 23:31:03,045 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-19 23:31:03,045 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-19 23:31:03,045 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-19 23:31:03,046 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 23:31:03,046 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 23:31:03,222 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 23:31:03,250 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 23:31:03,252 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 23:31:03,252 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 23:31:03,253 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 23:31:03,254 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/cohencu-ll.c [2022-03-19 23:31:03,302 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2711b6b01/bed1ddcb647c4c1baf5b5ab2e79b3850/FLAGe04c6ee15 [2022-03-19 23:31:03,690 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 23:31:03,691 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/cohencu-ll.c [2022-03-19 23:31:03,696 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2711b6b01/bed1ddcb647c4c1baf5b5ab2e79b3850/FLAGe04c6ee15 [2022-03-19 23:31:03,707 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2711b6b01/bed1ddcb647c4c1baf5b5ab2e79b3850 [2022-03-19 23:31:03,709 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 23:31:03,710 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 23:31:03,713 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 23:31:03,713 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 23:31:03,715 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 23:31:03,715 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 11:31:03" (1/1) ... [2022-03-19 23:31:03,716 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52ad0c5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:31:03, skipping insertion in model container [2022-03-19 23:31:03,716 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 11:31:03" (1/1) ... [2022-03-19 23:31:03,721 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 23:31:03,742 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 23:31:03,861 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/cohencu-ll.c[588,601] [2022-03-19 23:31:03,881 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 23:31:03,886 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 23:31:03,894 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/cohencu-ll.c[588,601] [2022-03-19 23:31:03,907 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 23:31:03,918 INFO L208 MainTranslator]: Completed translation [2022-03-19 23:31:03,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:31:03 WrapperNode [2022-03-19 23:31:03,918 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 23:31:03,919 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 23:31:03,919 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 23:31:03,919 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 23:31:03,926 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:31:03" (1/1) ... [2022-03-19 23:31:03,926 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:31:03" (1/1) ... [2022-03-19 23:31:03,931 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:31:03" (1/1) ... [2022-03-19 23:31:03,931 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:31:03" (1/1) ... [2022-03-19 23:31:03,934 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:31:03" (1/1) ... [2022-03-19 23:31:03,936 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:31:03" (1/1) ... [2022-03-19 23:31:03,937 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:31:03" (1/1) ... [2022-03-19 23:31:03,938 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 23:31:03,939 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 23:31:03,939 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 23:31:03,939 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 23:31:03,940 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:31:03" (1/1) ... [2022-03-19 23:31:03,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 23:31:03,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:31:03,971 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-19 23:31:03,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-19 23:31:03,998 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 23:31:03,998 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 23:31:03,998 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 23:31:03,999 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 23:31:03,999 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 23:31:03,999 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 23:31:03,999 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 23:31:03,999 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 23:31:03,999 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 23:31:03,999 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 23:31:04,000 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ushort [2022-03-19 23:31:04,000 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 23:31:04,000 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 23:31:04,000 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 23:31:04,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 23:31:04,000 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 23:31:04,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 23:31:04,000 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 23:31:04,000 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 23:31:04,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 23:31:04,074 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 23:31:04,075 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 23:31:04,211 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 23:31:04,215 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 23:31:04,215 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-19 23:31:04,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 11:31:04 BoogieIcfgContainer [2022-03-19 23:31:04,216 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 23:31:04,218 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 23:31:04,218 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 23:31:04,233 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 23:31:04,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 11:31:03" (1/3) ... [2022-03-19 23:31:04,234 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73541521 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 11:31:04, skipping insertion in model container [2022-03-19 23:31:04,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:31:03" (2/3) ... [2022-03-19 23:31:04,234 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73541521 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 11:31:04, skipping insertion in model container [2022-03-19 23:31:04,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 11:31:04" (3/3) ... [2022-03-19 23:31:04,235 INFO L111 eAbstractionObserver]: Analyzing ICFG cohencu-ll.c [2022-03-19 23:31:04,239 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-19 23:31:04,239 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 23:31:04,289 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 23:31:04,294 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-19 23:31:04,294 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 23:31:04,312 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-19 23:31:04,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-19 23:31:04,323 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:31:04,323 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:31:04,324 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:31:04,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:31:04,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1298655804, now seen corresponding path program 1 times [2022-03-19 23:31:04,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:31:04,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156840923] [2022-03-19 23:31:04,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:31:04,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:31:04,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:31:04,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:31:04,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:31:04,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:31:04,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:31:04,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156840923] [2022-03-19 23:31:04,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156840923] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:31:04,505 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:31:04,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 23:31:04,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334612557] [2022-03-19 23:31:04,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:31:04,510 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 23:31:04,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:31:04,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 23:31:04,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 23:31:04,535 INFO L87 Difference]: Start difference. First operand has 30 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:31:04,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:31:04,644 INFO L93 Difference]: Finished difference Result 54 states and 91 transitions. [2022-03-19 23:31:04,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 23:31:04,646 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-19 23:31:04,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:31:04,653 INFO L225 Difference]: With dead ends: 54 [2022-03-19 23:31:04,653 INFO L226 Difference]: Without dead ends: 25 [2022-03-19 23:31:04,656 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 23:31:04,660 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 11 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:31:04,661 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 32 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:31:04,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-03-19 23:31:04,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-03-19 23:31:04,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 10 states have internal predecessors, (11), 13 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-19 23:31:04,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 35 transitions. [2022-03-19 23:31:04,701 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 35 transitions. Word has length 11 [2022-03-19 23:31:04,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:31:04,701 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 35 transitions. [2022-03-19 23:31:04,702 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:31:04,702 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 35 transitions. [2022-03-19 23:31:04,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-19 23:31:04,703 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:31:04,703 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:31:04,703 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 23:31:04,704 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:31:04,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:31:04,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1297106672, now seen corresponding path program 1 times [2022-03-19 23:31:04,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:31:04,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237988317] [2022-03-19 23:31:04,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:31:04,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:31:04,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:31:04,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:31:04,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:31:04,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:31:04,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:31:04,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237988317] [2022-03-19 23:31:04,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237988317] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:31:04,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:31:04,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 23:31:04,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050840972] [2022-03-19 23:31:04,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:31:04,868 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 23:31:04,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:31:04,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 23:31:04,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-19 23:31:04,869 INFO L87 Difference]: Start difference. First operand 25 states and 35 transitions. Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:31:05,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:31:05,091 INFO L93 Difference]: Finished difference Result 31 states and 40 transitions. [2022-03-19 23:31:05,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 23:31:05,091 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-19 23:31:05,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:31:05,092 INFO L225 Difference]: With dead ends: 31 [2022-03-19 23:31:05,092 INFO L226 Difference]: Without dead ends: 29 [2022-03-19 23:31:05,093 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-19 23:31:05,094 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:31:05,094 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 38 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 23:31:05,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-03-19 23:31:05,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-03-19 23:31:05,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-19 23:31:05,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2022-03-19 23:31:05,103 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 11 [2022-03-19 23:31:05,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:31:05,103 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2022-03-19 23:31:05,103 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:31:05,103 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2022-03-19 23:31:05,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-19 23:31:05,104 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:31:05,104 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:31:05,104 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-19 23:31:05,104 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:31:05,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:31:05,105 INFO L85 PathProgramCache]: Analyzing trace with hash -2099401665, now seen corresponding path program 1 times [2022-03-19 23:31:05,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:31:05,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756294763] [2022-03-19 23:31:05,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:31:05,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:31:05,114 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 23:31:05,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [155293863] [2022-03-19 23:31:05,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:31:05,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:31:05,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:31:05,116 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:31:05,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 23:31:05,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:31:05,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 23:31:05,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:31:05,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:31:05,231 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 23:31:05,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:31:05,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756294763] [2022-03-19 23:31:05,231 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 23:31:05,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155293863] [2022-03-19 23:31:05,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155293863] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:31:05,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:31:05,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 23:31:05,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324321970] [2022-03-19 23:31:05,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:31:05,248 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 23:31:05,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:31:05,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 23:31:05,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 23:31:05,249 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 23:31:05,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:31:05,284 INFO L93 Difference]: Finished difference Result 48 states and 67 transitions. [2022-03-19 23:31:05,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 23:31:05,285 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2022-03-19 23:31:05,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:31:05,285 INFO L225 Difference]: With dead ends: 48 [2022-03-19 23:31:05,285 INFO L226 Difference]: Without dead ends: 46 [2022-03-19 23:31:05,286 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 23:31:05,287 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:31:05,287 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 145 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:31:05,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-03-19 23:31:05,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 36. [2022-03-19 23:31:05,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 16 states have (on average 1.125) internal successors, (18), 18 states have internal predecessors, (18), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-19 23:31:05,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2022-03-19 23:31:05,295 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 16 [2022-03-19 23:31:05,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:31:05,295 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2022-03-19 23:31:05,295 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 23:31:05,295 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2022-03-19 23:31:05,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-19 23:31:05,296 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:31:05,296 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:31:05,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-19 23:31:05,513 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:31:05,513 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:31:05,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:31:05,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1061128656, now seen corresponding path program 1 times [2022-03-19 23:31:05,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:31:05,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091275282] [2022-03-19 23:31:05,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:31:05,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:31:05,521 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 23:31:05,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1261201170] [2022-03-19 23:31:05,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:31:05,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:31:05,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:31:05,523 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:31:05,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 23:31:05,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:31:05,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 23:31:05,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:31:05,664 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:31:05,664 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 23:31:05,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:31:05,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091275282] [2022-03-19 23:31:05,664 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 23:31:05,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261201170] [2022-03-19 23:31:05,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261201170] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:31:05,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:31:05,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 23:31:05,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521041236] [2022-03-19 23:31:05,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:31:05,665 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 23:31:05,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:31:05,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 23:31:05,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 23:31:05,666 INFO L87 Difference]: Start difference. First operand 36 states and 46 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:31:05,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:31:05,722 INFO L93 Difference]: Finished difference Result 52 states and 70 transitions. [2022-03-19 23:31:05,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 23:31:05,723 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2022-03-19 23:31:05,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:31:05,726 INFO L225 Difference]: With dead ends: 52 [2022-03-19 23:31:05,726 INFO L226 Difference]: Without dead ends: 50 [2022-03-19 23:31:05,727 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 23:31:05,730 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:31:05,731 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 142 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:31:05,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-19 23:31:05,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2022-03-19 23:31:05,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 20 states have (on average 1.15) internal successors, (23), 22 states have internal predecessors, (23), 20 states have call successors, (20), 6 states have call predecessors, (20), 5 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-19 23:31:05,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 61 transitions. [2022-03-19 23:31:05,742 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 61 transitions. Word has length 21 [2022-03-19 23:31:05,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:31:05,742 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 61 transitions. [2022-03-19 23:31:05,742 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:31:05,742 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 61 transitions. [2022-03-19 23:31:05,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-19 23:31:05,743 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:31:05,743 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:31:05,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 23:31:05,943 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-19 23:31:05,946 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:31:05,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:31:05,947 INFO L85 PathProgramCache]: Analyzing trace with hash 2039501471, now seen corresponding path program 1 times [2022-03-19 23:31:05,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:31:05,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44147556] [2022-03-19 23:31:05,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:31:05,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:31:05,959 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 23:31:05,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [371561668] [2022-03-19 23:31:05,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:31:05,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:31:05,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:31:05,961 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:31:05,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 23:31:05,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:31:05,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 23:31:05,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:31:06,069 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 23:31:06,070 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 23:31:06,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:31:06,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44147556] [2022-03-19 23:31:06,070 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 23:31:06,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371561668] [2022-03-19 23:31:06,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371561668] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:31:06,070 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:31:06,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 23:31:06,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436996364] [2022-03-19 23:31:06,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:31:06,071 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 23:31:06,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:31:06,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 23:31:06,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 23:31:06,072 INFO L87 Difference]: Start difference. First operand 46 states and 61 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:31:06,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:31:06,120 INFO L93 Difference]: Finished difference Result 60 states and 76 transitions. [2022-03-19 23:31:06,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 23:31:06,120 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 26 [2022-03-19 23:31:06,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:31:06,121 INFO L225 Difference]: With dead ends: 60 [2022-03-19 23:31:06,121 INFO L226 Difference]: Without dead ends: 48 [2022-03-19 23:31:06,122 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 23:31:06,122 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:31:06,122 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 134 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:31:06,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-19 23:31:06,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-03-19 23:31:06,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 24 states have internal predecessors, (25), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-19 23:31:06,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions. [2022-03-19 23:31:06,128 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 26 [2022-03-19 23:31:06,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:31:06,129 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 59 transitions. [2022-03-19 23:31:06,129 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:31:06,129 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions. [2022-03-19 23:31:06,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-19 23:31:06,130 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:31:06,130 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:31:06,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 23:31:06,345 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:31:06,351 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:31:06,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:31:06,351 INFO L85 PathProgramCache]: Analyzing trace with hash 542006608, now seen corresponding path program 1 times [2022-03-19 23:31:06,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:31:06,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659359794] [2022-03-19 23:31:06,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:31:06,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:31:06,359 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 23:31:06,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2078535066] [2022-03-19 23:31:06,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:31:06,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:31:06,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:31:06,361 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:31:06,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 23:31:06,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:31:06,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 23:31:06,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:31:06,540 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-19 23:31:06,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:31:06,659 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-19 23:31:06,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:31:06,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659359794] [2022-03-19 23:31:06,659 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 23:31:06,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078535066] [2022-03-19 23:31:06,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078535066] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:31:06,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 23:31:06,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-03-19 23:31:06,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394131798] [2022-03-19 23:31:06,660 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-19 23:31:06,660 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 23:31:06,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:31:06,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 23:31:06,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-19 23:31:06,661 INFO L87 Difference]: Start difference. First operand 48 states and 59 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-19 23:31:07,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:31:07,027 INFO L93 Difference]: Finished difference Result 71 states and 91 transitions. [2022-03-19 23:31:07,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 23:31:07,027 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 43 [2022-03-19 23:31:07,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:31:07,028 INFO L225 Difference]: With dead ends: 71 [2022-03-19 23:31:07,028 INFO L226 Difference]: Without dead ends: 69 [2022-03-19 23:31:07,029 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-03-19 23:31:07,029 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 9 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:31:07,029 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 175 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 23:31:07,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-03-19 23:31:07,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 56. [2022-03-19 23:31:07,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 30 states have internal predecessors, (31), 18 states have call successors, (18), 9 states have call predecessors, (18), 8 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-19 23:31:07,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2022-03-19 23:31:07,042 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 43 [2022-03-19 23:31:07,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:31:07,042 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2022-03-19 23:31:07,043 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-19 23:31:07,043 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2022-03-19 23:31:07,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-19 23:31:07,044 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:31:07,044 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:31:07,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 23:31:07,262 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:31:07,262 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:31:07,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:31:07,263 INFO L85 PathProgramCache]: Analyzing trace with hash 806930367, now seen corresponding path program 2 times [2022-03-19 23:31:07,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:31:07,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386626892] [2022-03-19 23:31:07,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:31:07,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:31:07,272 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 23:31:07,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [881239251] [2022-03-19 23:31:07,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:31:07,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:31:07,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:31:07,274 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:31:07,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 23:31:07,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:31:07,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:31:07,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 23:31:07,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:31:07,428 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-19 23:31:07,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:31:07,523 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-19 23:31:07,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:31:07,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386626892] [2022-03-19 23:31:07,529 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 23:31:07,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881239251] [2022-03-19 23:31:07,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881239251] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:31:07,529 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 23:31:07,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-03-19 23:31:07,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740034800] [2022-03-19 23:31:07,530 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-19 23:31:07,531 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 23:31:07,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:31:07,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 23:31:07,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-19 23:31:07,532 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 5 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-19 23:31:07,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:31:07,610 INFO L93 Difference]: Finished difference Result 75 states and 94 transitions. [2022-03-19 23:31:07,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 23:31:07,610 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 5 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 48 [2022-03-19 23:31:07,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:31:07,614 INFO L225 Difference]: With dead ends: 75 [2022-03-19 23:31:07,614 INFO L226 Difference]: Without dead ends: 73 [2022-03-19 23:31:07,614 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-19 23:31:07,614 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 7 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:31:07,615 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 211 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:31:07,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-03-19 23:31:07,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 64. [2022-03-19 23:31:07,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 35 states have internal predecessors, (35), 21 states have call successors, (21), 10 states have call predecessors, (21), 9 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-19 23:31:07,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2022-03-19 23:31:07,634 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 48 [2022-03-19 23:31:07,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:31:07,635 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2022-03-19 23:31:07,636 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 5 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-19 23:31:07,636 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2022-03-19 23:31:07,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-19 23:31:07,638 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:31:07,638 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:31:07,657 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-19 23:31:07,839 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:31:07,840 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:31:07,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:31:07,840 INFO L85 PathProgramCache]: Analyzing trace with hash 231187056, now seen corresponding path program 3 times [2022-03-19 23:31:07,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:31:07,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195826969] [2022-03-19 23:31:07,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:31:07,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:31:07,848 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 23:31:07,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [794708026] [2022-03-19 23:31:07,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:31:07,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:31:07,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:31:07,851 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:31:07,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 23:31:07,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-19 23:31:07,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:31:07,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-19 23:31:07,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:31:08,042 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-19 23:31:08,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:31:08,193 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-19 23:31:08,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:31:08,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195826969] [2022-03-19 23:31:08,194 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 23:31:08,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794708026] [2022-03-19 23:31:08,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794708026] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:31:08,194 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 23:31:08,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-03-19 23:31:08,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382870984] [2022-03-19 23:31:08,194 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-19 23:31:08,194 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 23:31:08,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:31:08,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 23:31:08,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-19 23:31:08,195 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2022-03-19 23:31:08,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:31:08,751 INFO L93 Difference]: Finished difference Result 87 states and 103 transitions. [2022-03-19 23:31:08,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 23:31:08,751 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) Word has length 53 [2022-03-19 23:31:08,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:31:08,752 INFO L225 Difference]: With dead ends: 87 [2022-03-19 23:31:08,752 INFO L226 Difference]: Without dead ends: 79 [2022-03-19 23:31:08,752 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-03-19 23:31:08,753 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 10 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 23:31:08,753 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 155 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 23:31:08,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-19 23:31:08,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 73. [2022-03-19 23:31:08,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 44 states have internal predecessors, (44), 18 states have call successors, (18), 13 states have call predecessors, (18), 12 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-19 23:31:08,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 78 transitions. [2022-03-19 23:31:08,766 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 78 transitions. Word has length 53 [2022-03-19 23:31:08,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:31:08,766 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 78 transitions. [2022-03-19 23:31:08,767 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2022-03-19 23:31:08,767 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 78 transitions. [2022-03-19 23:31:08,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-19 23:31:08,769 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:31:08,770 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:31:08,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-19 23:31:08,991 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:31:08,992 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:31:08,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:31:08,992 INFO L85 PathProgramCache]: Analyzing trace with hash -950464918, now seen corresponding path program 1 times [2022-03-19 23:31:08,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:31:08,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316049527] [2022-03-19 23:31:08,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:31:08,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:31:09,000 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 23:31:09,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [123917143] [2022-03-19 23:31:09,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:31:09,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:31:09,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:31:09,013 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:31:09,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 23:31:09,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:31:09,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-19 23:31:09,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:31:09,610 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-19 23:31:09,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:31:09,883 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-19 23:31:09,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:31:09,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316049527] [2022-03-19 23:31:09,884 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 23:31:09,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123917143] [2022-03-19 23:31:09,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123917143] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:31:09,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 23:31:09,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-03-19 23:31:09,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824973433] [2022-03-19 23:31:09,884 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-19 23:31:09,884 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 23:31:09,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:31:09,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 23:31:09,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-19 23:31:09,885 INFO L87 Difference]: Start difference. First operand 73 states and 78 transitions. Second operand has 10 states, 8 states have (on average 2.25) internal successors, (18), 9 states have internal predecessors, (18), 7 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2022-03-19 23:31:10,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:31:10,125 INFO L93 Difference]: Finished difference Result 99 states and 115 transitions. [2022-03-19 23:31:10,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 23:31:10,125 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.25) internal successors, (18), 9 states have internal predecessors, (18), 7 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) Word has length 69 [2022-03-19 23:31:10,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:31:10,126 INFO L225 Difference]: With dead ends: 99 [2022-03-19 23:31:10,126 INFO L226 Difference]: Without dead ends: 97 [2022-03-19 23:31:10,126 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-03-19 23:31:10,127 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 10 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:31:10,127 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 198 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:31:10,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-03-19 23:31:10,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 93. [2022-03-19 23:31:10,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 53 states have internal predecessors, (55), 27 states have call successors, (27), 15 states have call predecessors, (27), 14 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-19 23:31:10,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 107 transitions. [2022-03-19 23:31:10,142 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 107 transitions. Word has length 69 [2022-03-19 23:31:10,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:31:10,142 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 107 transitions. [2022-03-19 23:31:10,142 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.25) internal successors, (18), 9 states have internal predecessors, (18), 7 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2022-03-19 23:31:10,142 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 107 transitions. [2022-03-19 23:31:10,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-19 23:31:10,143 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:31:10,143 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 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] [2022-03-19 23:31:10,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-19 23:31:10,360 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:31:10,360 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:31:10,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:31:10,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1778111067, now seen corresponding path program 1 times [2022-03-19 23:31:10,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:31:10,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146750942] [2022-03-19 23:31:10,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:31:10,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:31:10,368 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 23:31:10,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1175289072] [2022-03-19 23:31:10,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:31:10,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:31:10,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:31:10,369 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:31:10,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-19 23:31:10,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:31:10,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-19 23:31:10,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:31:10,670 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-19 23:31:10,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:31:10,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:31:10,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146750942] [2022-03-19 23:31:10,844 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 23:31:10,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175289072] [2022-03-19 23:31:10,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175289072] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:31:10,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 23:31:10,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-03-19 23:31:10,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243918164] [2022-03-19 23:31:10,845 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-19 23:31:10,845 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 23:31:10,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:31:10,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 23:31:10,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-03-19 23:31:10,846 INFO L87 Difference]: Start difference. First operand 93 states and 107 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-19 23:31:10,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:31:10,932 INFO L93 Difference]: Finished difference Result 102 states and 117 transitions. [2022-03-19 23:31:10,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 23:31:10,932 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 74 [2022-03-19 23:31:10,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:31:10,934 INFO L225 Difference]: With dead ends: 102 [2022-03-19 23:31:10,934 INFO L226 Difference]: Without dead ends: 93 [2022-03-19 23:31:10,934 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-03-19 23:31:10,935 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 6 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:31:10,935 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 213 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:31:10,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-03-19 23:31:10,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-03-19 23:31:10,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 53 states have internal predecessors, (54), 27 states have call successors, (27), 15 states have call predecessors, (27), 14 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-19 23:31:10,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 106 transitions. [2022-03-19 23:31:10,947 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 106 transitions. Word has length 74 [2022-03-19 23:31:10,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:31:10,948 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 106 transitions. [2022-03-19 23:31:10,948 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-19 23:31:10,948 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 106 transitions. [2022-03-19 23:31:10,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-19 23:31:10,948 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:31:10,948 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:31:10,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-19 23:31:11,167 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,SelfDestructingSolverStorable9 [2022-03-19 23:31:11,167 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:31:11,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:31:11,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1848052528, now seen corresponding path program 4 times [2022-03-19 23:31:11,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:31:11,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120612858] [2022-03-19 23:31:11,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:31:11,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:31:11,174 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 23:31:11,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1488397122] [2022-03-19 23:31:11,174 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:31:11,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:31:11,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:31:11,175 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:31:11,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-19 23:31:14,800 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:31:14,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:31:14,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-19 23:31:14,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:31:15,071 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 82 proven. 65 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-03-19 23:31:15,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:31:15,702 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 98 proven. 19 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2022-03-19 23:31:15,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:31:15,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120612858] [2022-03-19 23:31:15,702 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 23:31:15,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488397122] [2022-03-19 23:31:15,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488397122] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:31:15,702 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 23:31:15,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 15 [2022-03-19 23:31:15,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566738685] [2022-03-19 23:31:15,703 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-19 23:31:15,703 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 23:31:15,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:31:15,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 23:31:15,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-03-19 23:31:15,704 INFO L87 Difference]: Start difference. First operand 93 states and 106 transitions. Second operand has 15 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 9 states have internal predecessors, (22), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) [2022-03-19 23:31:15,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:31:15,834 INFO L93 Difference]: Finished difference Result 99 states and 111 transitions. [2022-03-19 23:31:15,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 23:31:15,835 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 9 states have internal predecessors, (22), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) Word has length 75 [2022-03-19 23:31:15,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:31:15,836 INFO L225 Difference]: With dead ends: 99 [2022-03-19 23:31:15,836 INFO L226 Difference]: Without dead ends: 97 [2022-03-19 23:31:15,836 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 132 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-03-19 23:31:15,836 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 15 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:31:15,837 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 95 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:31:15,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-03-19 23:31:15,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2022-03-19 23:31:15,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 56 states have internal predecessors, (57), 27 states have call successors, (27), 16 states have call predecessors, (27), 15 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-19 23:31:15,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 109 transitions. [2022-03-19 23:31:15,851 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 109 transitions. Word has length 75 [2022-03-19 23:31:15,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:31:15,851 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 109 transitions. [2022-03-19 23:31:15,851 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 9 states have internal predecessors, (22), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) [2022-03-19 23:31:15,852 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 109 transitions. [2022-03-19 23:31:15,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-03-19 23:31:15,852 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:31:15,852 INFO L499 BasicCegarLoop]: trace histogram [18, 17, 17, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:31:15,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-19 23:31:16,061 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:31:16,062 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:31:16,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:31:16,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1444427638, now seen corresponding path program 2 times [2022-03-19 23:31:16,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:31:16,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900246214] [2022-03-19 23:31:16,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:31:16,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:31:16,070 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 23:31:16,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [207746408] [2022-03-19 23:31:16,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:31:16,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:31:16,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:31:16,091 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:31:16,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-19 23:31:16,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:31:16,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:31:16,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-19 23:31:16,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:31:16,412 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 34 proven. 21 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-03-19 23:31:16,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:31:16,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:31:16,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900246214] [2022-03-19 23:31:16,563 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 23:31:16,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207746408] [2022-03-19 23:31:16,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207746408] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:31:16,563 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 23:31:16,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-03-19 23:31:16,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610873029] [2022-03-19 23:31:16,563 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-19 23:31:16,563 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 23:31:16,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:31:16,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 23:31:16,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-19 23:31:16,564 INFO L87 Difference]: Start difference. First operand 97 states and 109 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-03-19 23:31:16,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:31:16,683 INFO L93 Difference]: Finished difference Result 116 states and 124 transitions. [2022-03-19 23:31:16,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 23:31:16,684 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 101 [2022-03-19 23:31:16,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:31:16,684 INFO L225 Difference]: With dead ends: 116 [2022-03-19 23:31:16,684 INFO L226 Difference]: Without dead ends: 103 [2022-03-19 23:31:16,685 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-03-19 23:31:16,685 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 6 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:31:16,685 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 261 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:31:16,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-19 23:31:16,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-03-19 23:31:16,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 61 states have internal predecessors, (62), 25 states have call successors, (25), 18 states have call predecessors, (25), 17 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-19 23:31:16,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 110 transitions. [2022-03-19 23:31:16,697 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 110 transitions. Word has length 101 [2022-03-19 23:31:16,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:31:16,697 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 110 transitions. [2022-03-19 23:31:16,697 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-03-19 23:31:16,697 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 110 transitions. [2022-03-19 23:31:16,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-03-19 23:31:16,698 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:31:16,698 INFO L499 BasicCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:31:16,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-19 23:31:16,911 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,SelfDestructingSolverStorable11 [2022-03-19 23:31:16,912 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:31:16,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:31:16,912 INFO L85 PathProgramCache]: Analyzing trace with hash 2017316106, now seen corresponding path program 2 times [2022-03-19 23:31:16,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:31:16,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481673256] [2022-03-19 23:31:16,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:31:16,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:31:16,918 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 23:31:16,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1161908857] [2022-03-19 23:31:16,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:31:16,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:31:16,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:31:16,919 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:31:16,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-19 23:31:16,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:31:16,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:31:16,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-19 23:31:16,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:31:17,440 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 42 proven. 42 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2022-03-19 23:31:17,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:31:17,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:31:17,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481673256] [2022-03-19 23:31:17,604 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 23:31:17,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161908857] [2022-03-19 23:31:17,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161908857] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:31:17,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 23:31:17,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-03-19 23:31:17,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883197401] [2022-03-19 23:31:17,604 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-19 23:31:17,605 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 23:31:17,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:31:17,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 23:31:17,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-03-19 23:31:17,605 INFO L87 Difference]: Start difference. First operand 103 states and 110 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 6 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2022-03-19 23:31:17,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:31:17,767 INFO L93 Difference]: Finished difference Result 135 states and 145 transitions. [2022-03-19 23:31:17,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 23:31:17,768 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 6 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 123 [2022-03-19 23:31:17,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:31:17,769 INFO L225 Difference]: With dead ends: 135 [2022-03-19 23:31:17,769 INFO L226 Difference]: Without dead ends: 133 [2022-03-19 23:31:17,769 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 149 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-03-19 23:31:17,769 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 6 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:31:17,769 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 321 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:31:17,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-03-19 23:31:17,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2022-03-19 23:31:17,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 77 states have (on average 1.0389610389610389) internal successors, (80), 79 states have internal predecessors, (80), 32 states have call successors, (32), 23 states have call predecessors, (32), 22 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2022-03-19 23:31:17,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 142 transitions. [2022-03-19 23:31:17,784 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 142 transitions. Word has length 123 [2022-03-19 23:31:17,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:31:17,784 INFO L478 AbstractCegarLoop]: Abstraction has 132 states and 142 transitions. [2022-03-19 23:31:17,784 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 6 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2022-03-19 23:31:17,785 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 142 transitions. [2022-03-19 23:31:17,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-03-19 23:31:17,785 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:31:17,785 INFO L499 BasicCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:31:17,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-19 23:31:17,999 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-19 23:31:17,999 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:31:18,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:31:18,000 INFO L85 PathProgramCache]: Analyzing trace with hash 493720325, now seen corresponding path program 3 times [2022-03-19 23:31:18,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:31:18,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113784149] [2022-03-19 23:31:18,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:31:18,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:31:18,006 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 23:31:18,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1629873603] [2022-03-19 23:31:18,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:31:18,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:31:18,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:31:18,008 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:31:18,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-19 23:31:19,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-19 23:31:19,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:31:19,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-19 23:31:19,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:31:30,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 181 proven. 69 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-03-19 23:31:30,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:31:36,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 148 proven. 39 refuted. 0 times theorem prover too weak. 823 trivial. 0 not checked. [2022-03-19 23:31:36,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:31:36,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113784149] [2022-03-19 23:31:36,593 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 23:31:36,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629873603] [2022-03-19 23:31:36,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629873603] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:31:36,593 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 23:31:36,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2022-03-19 23:31:36,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597163568] [2022-03-19 23:31:36,616 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-19 23:31:36,617 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 23:31:36,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:31:36,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 23:31:36,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-03-19 23:31:36,617 INFO L87 Difference]: Start difference. First operand 132 states and 142 transitions. Second operand has 16 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 12 states have internal predecessors, (27), 9 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (32), 8 states have call predecessors, (32), 9 states have call successors, (32) [2022-03-19 23:31:42,124 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 23:31:45,323 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 23:31:46,876 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 23:31:55,739 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 23:31:56,992 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 23:31:58,341 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 23:31:58,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:31:58,344 INFO L93 Difference]: Finished difference Result 132 states and 142 transitions. [2022-03-19 23:31:58,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 23:31:58,357 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 12 states have internal predecessors, (27), 9 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (32), 8 states have call predecessors, (32), 9 states have call successors, (32) Word has length 128 [2022-03-19 23:31:58,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:31:58,358 INFO L225 Difference]: With dead ends: 132 [2022-03-19 23:31:58,358 INFO L226 Difference]: Without dead ends: 0 [2022-03-19 23:31:58,359 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 240 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=99, Invalid=320, Unknown=1, NotChecked=0, Total=420 [2022-03-19 23:31:58,359 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 18 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 50 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.6s IncrementalHoareTripleChecker+Time [2022-03-19 23:31:58,359 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 143 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 138 Invalid, 2 Unknown, 0 Unchecked, 16.6s Time] [2022-03-19 23:31:58,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-19 23:31:58,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-19 23:31:58,360 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) [2022-03-19 23:31:58,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-19 23:31:58,360 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 128 [2022-03-19 23:31:58,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:31:58,360 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-19 23:31:58,360 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 12 states have internal predecessors, (27), 9 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (32), 8 states have call predecessors, (32), 9 states have call successors, (32) [2022-03-19 23:31:58,360 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-19 23:31:58,360 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-19 23:31:58,362 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-19 23:31:58,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-19 23:31:58,567 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-19 23:31:58,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-19 23:32:01,757 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 8) no Hoare annotation was computed. [2022-03-19 23:32:01,757 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 8) no Hoare annotation was computed. [2022-03-19 23:32:01,757 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 8) no Hoare annotation was computed. [2022-03-19 23:32:01,757 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notENTRY(lines 11 13) no Hoare annotation was computed. [2022-03-19 23:32:01,757 INFO L882 garLoopResultBuilder]: For program point L12(line 12) no Hoare annotation was computed. [2022-03-19 23:32:01,757 INFO L882 garLoopResultBuilder]: For program point L12-2(lines 11 13) no Hoare annotation was computed. [2022-03-19 23:32:01,757 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 11 13) no Hoare annotation was computed. [2022-03-19 23:32:01,757 INFO L878 garLoopResultBuilder]: At program point L33(line 33) the Hoare annotation is: (let ((.cse0 (= (+ (* main_~n~0 6) 6) main_~z~0)) (.cse1 (or (and (<= 0 (+ 65536 main_~a~0)) (not (<= (mod main_~a~0 65536) 32767)) (< main_~a~0 0)) (and (< main_~a~0 65536) (<= 0 main_~a~0) (<= (div main_~a~0 (- 65536)) (div (+ (* (- 1) main_~a~0) 32767) 65536))))) (.cse2 (= (* main_~n~0 main_~n~0 main_~n~0) main_~x~0))) (or (and (= (+ (* main_~z~0 main_~z~0) 12) (+ (* main_~y~0 12) (* main_~z~0 6))) .cse0 .cse1 (= main_~z~0 6) .cse2) (and (<= main_~n~0 (+ main_~a~0 1)) .cse0 .cse1 (= (+ (* 3 (* main_~n~0 main_~n~0)) (* main_~n~0 3) 1) main_~y~0) .cse2))) [2022-03-19 23:32:01,758 INFO L878 garLoopResultBuilder]: At program point L33-1(line 33) the Hoare annotation is: (let ((.cse0 (= (+ (* main_~n~0 6) 6) main_~z~0)) (.cse1 (or (and (<= 0 (+ 65536 main_~a~0)) (not (<= (mod main_~a~0 65536) 32767)) (< main_~a~0 0)) (and (< main_~a~0 65536) (<= 0 main_~a~0) (<= (div main_~a~0 (- 65536)) (div (+ (* (- 1) main_~a~0) 32767) 65536))))) (.cse2 (= (* main_~n~0 main_~n~0 main_~n~0) main_~x~0))) (or (and (= (+ (* main_~z~0 main_~z~0) 12) (+ (* main_~y~0 12) (* main_~z~0 6))) .cse0 .cse1 (= main_~z~0 6) .cse2) (and (<= main_~n~0 (+ main_~a~0 1)) .cse0 .cse1 (= (+ (* 3 (* main_~n~0 main_~n~0)) (* main_~n~0 3) 1) main_~y~0) .cse2))) [2022-03-19 23:32:01,758 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 22 55) no Hoare annotation was computed. [2022-03-19 23:32:01,758 INFO L882 garLoopResultBuilder]: For program point L52(line 52) no Hoare annotation was computed. [2022-03-19 23:32:01,758 INFO L878 garLoopResultBuilder]: At program point L50(line 50) the Hoare annotation is: (and (= (+ (* main_~x~0 18) (* main_~y~0 12) 6) (+ (* main_~z~0 2) (* main_~z~0 main_~y~0))) (= (+ (* main_~n~0 6) 6) main_~z~0) (= (+ (* 3 (* main_~n~0 main_~n~0)) (* main_~n~0 3) 1) main_~y~0)) [2022-03-19 23:32:01,758 INFO L878 garLoopResultBuilder]: At program point L48(line 48) the Hoare annotation is: (let ((.cse1 (= (+ (* main_~n~0 6) 6) main_~z~0))) (or (let ((.cse0 (div (+ main_~z~0 (- 6)) 6))) (and (= (+ (* 3 (* main_~n~0 main_~n~0)) main_~z~0) (+ 5 main_~y~0 (* main_~n~0 3))) (not (<= .cse0 main_~a~0)) .cse1 (or (and (<= 0 (+ 65536 main_~a~0)) (not (<= (mod main_~a~0 65536) 32767)) (< main_~a~0 0)) (and (< main_~a~0 65536) (<= 0 main_~a~0) (<= (div main_~a~0 (- 65536)) (div (+ (* (- 1) main_~a~0) 32767) 65536)))) (<= .cse0 (+ main_~a~0 1)) (= (* main_~n~0 main_~n~0 main_~n~0) main_~x~0))) (and (= main_~x~0 0) (= main_~y~0 1) .cse1 (= main_~z~0 6)))) [2022-03-19 23:32:01,758 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 22 55) no Hoare annotation was computed. [2022-03-19 23:32:01,758 INFO L878 garLoopResultBuilder]: At program point L36(line 36) the Hoare annotation is: (let ((.cse0 (* main_~y~0 12)) (.cse1 (= (+ (* main_~n~0 6) 6) main_~z~0)) (.cse2 (or (and (<= 0 (+ 65536 main_~a~0)) (not (<= (mod main_~a~0 65536) 32767)) (< main_~a~0 0)) (and (< main_~a~0 65536) (<= 0 main_~a~0) (<= (div main_~a~0 (- 65536)) (div (+ (* (- 1) main_~a~0) 32767) 65536)))))) (or (and (= (+ (* main_~z~0 main_~z~0) 12) (+ .cse0 (* main_~z~0 6))) .cse1 .cse2 (= main_~z~0 6) (= (* main_~n~0 main_~n~0 main_~n~0) main_~x~0)) (and (<= main_~n~0 (+ main_~a~0 1)) (= (+ (* main_~x~0 18) .cse0 6) (+ (* main_~z~0 2) (* main_~z~0 main_~y~0))) .cse1 .cse2 (= (+ (* 3 (* main_~n~0 main_~n~0)) (* main_~n~0 3) 1) main_~y~0)))) [2022-03-19 23:32:01,758 INFO L878 garLoopResultBuilder]: At program point L34(line 34) the Hoare annotation is: (let ((.cse0 (= (+ (* main_~n~0 6) 6) main_~z~0)) (.cse1 (or (and (<= 0 (+ 65536 main_~a~0)) (not (<= (mod main_~a~0 65536) 32767)) (< main_~a~0 0)) (and (< main_~a~0 65536) (<= 0 main_~a~0) (<= (div main_~a~0 (- 65536)) (div (+ (* (- 1) main_~a~0) 32767) 65536))))) (.cse2 (= (* main_~n~0 main_~n~0 main_~n~0) main_~x~0))) (or (and (= (+ (* main_~z~0 main_~z~0) 12) (+ (* main_~y~0 12) (* main_~z~0 6))) .cse0 .cse1 (= main_~z~0 6) .cse2) (and (<= main_~n~0 (+ main_~a~0 1)) .cse0 .cse1 (= (+ (* 3 (* main_~n~0 main_~n~0)) (* main_~n~0 3) 1) main_~y~0) .cse2))) [2022-03-19 23:32:01,758 INFO L878 garLoopResultBuilder]: At program point L32-2(lines 32 45) the Hoare annotation is: (let ((.cse0 (= (+ (* main_~n~0 6) 6) main_~z~0)) (.cse1 (or (and (<= 0 (+ 65536 main_~a~0)) (not (<= (mod main_~a~0 65536) 32767)) (< main_~a~0 0)) (and (< main_~a~0 65536) (<= 0 main_~a~0) (<= (div main_~a~0 (- 65536)) (div (+ (* (- 1) main_~a~0) 32767) 65536))))) (.cse2 (= (* main_~n~0 main_~n~0 main_~n~0) main_~x~0))) (or (and (= (+ (* main_~z~0 main_~z~0) 12) (+ (* main_~y~0 12) (* main_~z~0 6))) .cse0 .cse1 (= main_~z~0 6) .cse2) (and (<= main_~n~0 (+ main_~a~0 1)) .cse0 .cse1 (= (+ (* 3 (* main_~n~0 main_~n~0)) (* main_~n~0 3) 1) main_~y~0) .cse2))) [2022-03-19 23:32:01,758 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 22 55) the Hoare annotation is: true [2022-03-19 23:32:01,758 INFO L878 garLoopResultBuilder]: At program point L32-3(lines 32 45) the Hoare annotation is: (let ((.cse0 (= (+ (* main_~n~0 6) 6) main_~z~0))) (or (and (= main_~x~0 0) (= main_~y~0 1) .cse0 (= main_~z~0 6)) (let ((.cse1 (div (+ main_~z~0 (- 6)) 6))) (and (not (<= .cse1 main_~a~0)) (= (+ (* main_~x~0 18) (* main_~y~0 12) 6) (+ (* main_~z~0 2) (* main_~z~0 main_~y~0))) .cse0 (or (and (<= 0 (+ 65536 main_~a~0)) (not (<= (mod main_~a~0 65536) 32767)) (< main_~a~0 0)) (and (< main_~a~0 65536) (<= 0 main_~a~0) (<= (div main_~a~0 (- 65536)) (div (+ (* (- 1) main_~a~0) 32767) 65536)))) (= (+ (* 3 (* main_~n~0 main_~n~0)) (* main_~n~0 3) 1) main_~y~0) (<= .cse1 (+ main_~a~0 1)))))) [2022-03-19 23:32:01,758 INFO L878 garLoopResultBuilder]: At program point L51(line 51) the Hoare annotation is: (and (= (+ (* main_~x~0 18) (* main_~y~0 12) 6) (+ (* main_~z~0 2) (* main_~z~0 main_~y~0))) (= (+ (* main_~n~0 6) 6) main_~z~0) (= (+ (* 3 (* main_~n~0 main_~n~0)) (* main_~n~0 3) 1) main_~y~0)) [2022-03-19 23:32:01,758 INFO L878 garLoopResultBuilder]: At program point L49(line 49) the Hoare annotation is: (and (= (+ (* main_~x~0 18) (* main_~y~0 12) 6) (+ (* main_~z~0 2) (* main_~z~0 main_~y~0))) (= (+ (* main_~n~0 6) 6) main_~z~0) (= (+ (* 3 (* main_~n~0 main_~n~0)) (* main_~n~0 3) 1) main_~y~0)) [2022-03-19 23:32:01,759 INFO L878 garLoopResultBuilder]: At program point L47(line 47) the Hoare annotation is: (let ((.cse0 (= (+ (* main_~n~0 6) 6) main_~z~0))) (or (and (= main_~x~0 0) (= main_~y~0 1) .cse0 (= main_~z~0 6)) (let ((.cse1 (div (+ main_~z~0 (- 6)) 6))) (and (not (<= .cse1 main_~a~0)) (= (+ (* main_~x~0 18) (* main_~y~0 12) 6) (+ (* main_~z~0 2) (* main_~z~0 main_~y~0))) .cse0 (or (and (<= 0 (+ 65536 main_~a~0)) (not (<= (mod main_~a~0 65536) 32767)) (< main_~a~0 0)) (and (< main_~a~0 65536) (<= 0 main_~a~0) (<= (div main_~a~0 (- 65536)) (div (+ (* (- 1) main_~a~0) 32767) 65536)))) (= (+ (* 3 (* main_~n~0 main_~n~0)) (* main_~n~0 3) 1) main_~y~0) (<= .cse1 (+ main_~a~0 1)))))) [2022-03-19 23:32:01,759 INFO L882 garLoopResultBuilder]: For program point L37(lines 32 45) no Hoare annotation was computed. [2022-03-19 23:32:01,759 INFO L878 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (let ((.cse0 (* main_~y~0 12)) (.cse1 (= (+ (* main_~n~0 6) 6) main_~z~0)) (.cse2 (or (and (<= 0 (+ 65536 main_~a~0)) (not (<= (mod main_~a~0 65536) 32767)) (< main_~a~0 0)) (and (< main_~a~0 65536) (<= 0 main_~a~0) (<= (div main_~a~0 (- 65536)) (div (+ (* (- 1) main_~a~0) 32767) 65536)))))) (or (and (= (+ (* main_~z~0 main_~z~0) 12) (+ .cse0 (* main_~z~0 6))) .cse1 .cse2 (= main_~z~0 6) (= (* main_~n~0 main_~n~0 main_~n~0) main_~x~0)) (and (<= main_~n~0 (+ main_~a~0 1)) (= (+ (* main_~x~0 18) .cse0 6) (+ (* main_~z~0 2) (* main_~z~0 main_~y~0))) .cse1 .cse2 (= (+ (* 3 (* main_~n~0 main_~n~0)) (* main_~n~0 3) 1) main_~y~0)))) [2022-03-19 23:32:01,759 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-03-19 23:32:01,759 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|)) [2022-03-19 23:32:01,759 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-03-19 23:32:01,759 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-03-19 23:32:01,759 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-19 23:32:01,759 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-19 23:32:01,759 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-03-19 23:32:01,759 INFO L882 garLoopResultBuilder]: For program point L16(lines 16 17) no Hoare annotation was computed. [2022-03-19 23:32:01,759 INFO L882 garLoopResultBuilder]: For program point L15(lines 15 18) no Hoare annotation was computed. [2022-03-19 23:32:01,759 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2022-03-19 23:32:01,759 INFO L882 garLoopResultBuilder]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2022-03-19 23:32:01,759 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2022-03-19 23:32:01,759 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2022-03-19 23:32:01,762 INFO L719 BasicCegarLoop]: Path program histogram: [4, 3, 2, 1, 1, 1, 1, 1] [2022-03-19 23:32:01,763 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-19 23:32:01,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.03 11:32:01 BoogieIcfgContainer [2022-03-19 23:32:01,785 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-19 23:32:01,785 INFO L158 Benchmark]: Toolchain (without parser) took 58075.11ms. Allocated memory was 177.2MB in the beginning and 361.8MB in the end (delta: 184.5MB). Free memory was 119.5MB in the beginning and 236.9MB in the end (delta: -117.4MB). Peak memory consumption was 184.6MB. Max. memory is 8.0GB. [2022-03-19 23:32:01,786 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 177.2MB. Free memory is still 135.8MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-19 23:32:01,786 INFO L158 Benchmark]: CACSL2BoogieTranslator took 206.11ms. Allocated memory was 177.2MB in the beginning and 300.9MB in the end (delta: 123.7MB). Free memory was 119.2MB in the beginning and 270.1MB in the end (delta: -150.8MB). Peak memory consumption was 7.7MB. Max. memory is 8.0GB. [2022-03-19 23:32:01,786 INFO L158 Benchmark]: Boogie Preprocessor took 19.43ms. Allocated memory is still 300.9MB. Free memory was 270.1MB in the beginning and 268.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-19 23:32:01,786 INFO L158 Benchmark]: RCFGBuilder took 277.33ms. Allocated memory is still 300.9MB. Free memory was 268.6MB in the beginning and 257.7MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-19 23:32:01,786 INFO L158 Benchmark]: TraceAbstraction took 57567.39ms. Allocated memory was 300.9MB in the beginning and 361.8MB in the end (delta: 60.8MB). Free memory was 257.1MB in the beginning and 236.9MB in the end (delta: 20.2MB). Peak memory consumption was 197.8MB. Max. memory is 8.0GB. [2022-03-19 23:32:01,787 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 177.2MB. Free memory is still 135.8MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 206.11ms. Allocated memory was 177.2MB in the beginning and 300.9MB in the end (delta: 123.7MB). Free memory was 119.2MB in the beginning and 270.1MB in the end (delta: -150.8MB). Peak memory consumption was 7.7MB. Max. memory is 8.0GB. * Boogie Preprocessor took 19.43ms. Allocated memory is still 300.9MB. Free memory was 270.1MB in the beginning and 268.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 277.33ms. Allocated memory is still 300.9MB. Free memory was 268.6MB in the beginning and 257.7MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 57567.39ms. Allocated memory was 300.9MB in the beginning and 361.8MB in the end (delta: 60.8MB). Free memory was 257.1MB in the beginning and 236.9MB in the end (delta: 20.2MB). Peak memory consumption was 197.8MB. 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, 37 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 57.5s, OverallIterations: 14, TraceHistogramMax: 23, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 24.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 3.2s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 189 SdHoareTripleChecker+Valid, 18.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 134 mSDsluCounter, 2263 SdHoareTripleChecker+Invalid, 18.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1736 mSDsCounter, 295 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1234 IncrementalHoareTripleChecker+Invalid, 1531 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 295 mSolverCounterUnsat, 527 mSDtfsCounter, 1234 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1347 GetRequests, 1210 SyntacticMatches, 13 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 14.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=132occurred in iteration=13, InterpolantAutomatonStates: 97, 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, 14 MinimizatonAttempts, 47 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 17 LocationsWithAnnotation, 75 PreInvPairs, 128 NumberOfFragments, 1226 HoareAnnotationTreeSize, 75 FomulaSimplifications, 1538 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 17 FomulaSimplificationsInter, 26209 FormulaSimplificationTreeSizeReductionInter, 3.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 5.0s SatisfiabilityAnalysisTime, 21.9s InterpolantComputationTime, 799 NumberOfCodeBlocks, 693 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 1195 ConstructedInterpolants, 0 QuantifiedInterpolants, 6651 SizeOfPredicates, 30 NumberOfNonLiveVariables, 1730 ConjunctsInSsa, 239 ConjunctsInUnsatCore, 20 InterpolantComputations, 5 PerfectInterpolantSequences, 5290/5590 InterpolantCoveringCapability, 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: 32]: Loop Invariant Derived loop invariant: ((((z * z + 12 == y * 12 + z * 6 && n * 6 + 6 == z) && (((0 <= 65536 + a && !(a % 65536 <= 32767)) && a < 0) || ((a < 65536 && 0 <= a) && a / -65536 <= (-1 * a + 32767) / 65536))) && z == 6) && n * n * n == x) || ((((n <= a + 1 && n * 6 + 6 == z) && (((0 <= 65536 + a && !(a % 65536 <= 32767)) && a < 0) || ((a < 65536 && 0 <= a) && a / -65536 <= (-1 * a + 32767) / 65536))) && 3 * (n * n) + n * 3 + 1 == y) && n * n * n == x) RESULT: Ultimate proved your program to be correct! [2022-03-19 23:32:01,812 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...