/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_Triplicated.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 12:20:06,854 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 12:20:06,856 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 12:20:06,890 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 12:20:06,890 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 12:20:06,891 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 12:20:06,892 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 12:20:06,893 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 12:20:06,894 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 12:20:06,895 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 12:20:06,896 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 12:20:06,897 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 12:20:06,897 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 12:20:06,898 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 12:20:06,899 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 12:20:06,899 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 12:20:06,900 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 12:20:06,902 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 12:20:06,904 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 12:20:06,905 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 12:20:06,906 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 12:20:06,911 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 12:20:06,911 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 12:20:06,912 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 12:20:06,915 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 12:20:06,915 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 12:20:06,915 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 12:20:06,916 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 12:20:06,916 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 12:20:06,917 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 12:20:06,917 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 12:20:06,918 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 12:20:06,918 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 12:20:06,919 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 12:20:06,920 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 12:20:06,920 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 12:20:06,920 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 12:20:06,929 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 12:20:06,929 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 12:20:06,931 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 12:20:06,932 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 12:20:06,933 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 12:20:06,960 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 12:20:06,960 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 12:20:06,961 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 12:20:06,961 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 12:20:06,961 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 12:20:06,961 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 12:20:06,961 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 12:20:06,962 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 12:20:06,962 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 12:20:06,962 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 12:20:06,962 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 12:20:06,962 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 12:20:06,962 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 12:20:06,962 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 12:20:06,962 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 12:20:06,963 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 12:20:06,963 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 12:20:06,963 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 12:20:06,963 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 12:20:06,963 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 12:20:06,963 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 12:20:06,964 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 12:20:06,964 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 12:20:06,964 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 12:20:06,964 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 12:20:06,964 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 12:20:06,964 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 12:20:06,964 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 12:20:06,964 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 12:20:06,965 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 12:20:06,965 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 12:20:06,965 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 12:20:06,965 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:20:06,965 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 12:20:06,969 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 12:20:06,969 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 12:20:06,970 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 12:20:06,970 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 12:20:06,970 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 12:20:06,970 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 12:20:06,970 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 12:20:06,971 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 12:20:07,178 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 12:20:07,199 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 12:20:07,201 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 12:20:07,202 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 12:20:07,203 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 12:20:07,204 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_Triplicated.ufo.UNBOUNDED.pals.c [2023-04-01 12:20:08,359 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 12:20:08,565 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 12:20:08,566 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_Triplicated.ufo.UNBOUNDED.pals.c [2023-04-01 12:20:08,573 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbee9bb19/b1dbaf5d74fe467b9ae81df15ff8b888/FLAG7301696df [2023-04-01 12:20:08,584 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbee9bb19/b1dbaf5d74fe467b9ae81df15ff8b888 [2023-04-01 12:20:08,586 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 12:20:08,587 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 12:20:08,588 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 12:20:08,588 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 12:20:08,591 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 12:20:08,592 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:20:08" (1/1) ... [2023-04-01 12:20:08,593 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@331506c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:20:08, skipping insertion in model container [2023-04-01 12:20:08,593 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:20:08" (1/1) ... [2023-04-01 12:20:08,598 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 12:20:08,630 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 12:20:08,812 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_Triplicated.ufo.UNBOUNDED.pals.c[12106,12119] [2023-04-01 12:20:08,815 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:20:08,823 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 12:20:08,871 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_Triplicated.ufo.UNBOUNDED.pals.c[12106,12119] [2023-04-01 12:20:08,871 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:20:08,892 INFO L208 MainTranslator]: Completed translation [2023-04-01 12:20:08,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:20:08 WrapperNode [2023-04-01 12:20:08,893 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 12:20:08,894 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 12:20:08,894 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 12:20:08,894 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 12:20:08,904 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:20:08" (1/1) ... [2023-04-01 12:20:08,904 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:20:08" (1/1) ... [2023-04-01 12:20:08,916 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:20:08" (1/1) ... [2023-04-01 12:20:08,916 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:20:08" (1/1) ... [2023-04-01 12:20:08,930 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:20:08" (1/1) ... [2023-04-01 12:20:08,948 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:20:08" (1/1) ... [2023-04-01 12:20:08,950 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:20:08" (1/1) ... [2023-04-01 12:20:08,952 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:20:08" (1/1) ... [2023-04-01 12:20:08,956 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 12:20:08,968 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 12:20:08,968 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 12:20:08,968 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 12:20:08,969 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:20:08" (1/1) ... [2023-04-01 12:20:08,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:20:08,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:20:09,012 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) [2023-04-01 12:20:09,028 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 [2023-04-01 12:20:09,047 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 12:20:09,047 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 12:20:09,047 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 12:20:09,048 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 12:20:09,049 INFO L138 BoogieDeclarations]: Found implementation of procedure add_history_type [2023-04-01 12:20:09,049 INFO L138 BoogieDeclarations]: Found implementation of procedure read_history_int8 [2023-04-01 12:20:09,049 INFO L138 BoogieDeclarations]: Found implementation of procedure read_history_bool [2023-04-01 12:20:09,049 INFO L138 BoogieDeclarations]: Found implementation of procedure write_history_int8 [2023-04-01 12:20:09,049 INFO L138 BoogieDeclarations]: Found implementation of procedure write_history_bool [2023-04-01 12:20:09,049 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2023-04-01 12:20:09,049 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2023-04-01 12:20:09,049 INFO L138 BoogieDeclarations]: Found implementation of procedure gate1_each_pals_period [2023-04-01 12:20:09,049 INFO L138 BoogieDeclarations]: Found implementation of procedure gate2_each_pals_period [2023-04-01 12:20:09,050 INFO L138 BoogieDeclarations]: Found implementation of procedure gate3_each_pals_period [2023-04-01 12:20:09,050 INFO L138 BoogieDeclarations]: Found implementation of procedure voter [2023-04-01 12:20:09,051 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 12:20:09,051 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2023-04-01 12:20:09,051 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 12:20:09,051 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 12:20:09,051 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 12:20:09,051 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 12:20:09,051 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 12:20:09,052 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 12:20:09,052 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 12:20:09,052 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 12:20:09,052 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 12:20:09,052 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 12:20:09,052 INFO L130 BoogieDeclarations]: Found specification of procedure read_history_bool [2023-04-01 12:20:09,052 INFO L130 BoogieDeclarations]: Found specification of procedure read_history_int8 [2023-04-01 12:20:09,052 INFO L130 BoogieDeclarations]: Found specification of procedure add_history_type [2023-04-01 12:20:09,053 INFO L130 BoogieDeclarations]: Found specification of procedure write_history_int8 [2023-04-01 12:20:09,053 INFO L130 BoogieDeclarations]: Found specification of procedure write_history_bool [2023-04-01 12:20:09,053 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 12:20:09,053 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 12:20:09,053 INFO L130 BoogieDeclarations]: Found specification of procedure gate1_each_pals_period [2023-04-01 12:20:09,053 INFO L130 BoogieDeclarations]: Found specification of procedure gate2_each_pals_period [2023-04-01 12:20:09,053 INFO L130 BoogieDeclarations]: Found specification of procedure gate3_each_pals_period [2023-04-01 12:20:09,053 INFO L130 BoogieDeclarations]: Found specification of procedure voter [2023-04-01 12:20:09,054 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 12:20:09,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 12:20:09,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 12:20:09,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 12:20:09,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 12:20:09,055 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 12:20:09,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 12:20:09,157 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 12:20:09,159 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 12:20:09,704 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 12:20:09,817 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 12:20:09,818 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-01 12:20:09,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:20:09 BoogieIcfgContainer [2023-04-01 12:20:09,822 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 12:20:09,824 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 12:20:09,824 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 12:20:09,827 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 12:20:09,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:20:08" (1/3) ... [2023-04-01 12:20:09,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@620b0a8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:20:09, skipping insertion in model container [2023-04-01 12:20:09,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:20:08" (2/3) ... [2023-04-01 12:20:09,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@620b0a8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:20:09, skipping insertion in model container [2023-04-01 12:20:09,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:20:09" (3/3) ... [2023-04-01 12:20:09,830 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_STARTPALS_Triplicated.ufo.UNBOUNDED.pals.c [2023-04-01 12:20:09,845 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 12:20:09,845 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 12:20:09,905 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 12:20:09,910 INFO L357 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=FINITE_AUTOMATA, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@9d7e113, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 12:20:09,911 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 12:20:09,915 INFO L276 IsEmpty]: Start isEmpty. Operand has 174 states, 111 states have (on average 1.4414414414414414) internal successors, (160), 116 states have internal predecessors, (160), 46 states have call successors, (46), 15 states have call predecessors, (46), 15 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2023-04-01 12:20:09,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-01 12:20:09,923 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:20:09,924 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:20:09,925 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:20:09,931 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:20:09,931 INFO L85 PathProgramCache]: Analyzing trace with hash -81149572, now seen corresponding path program 1 times [2023-04-01 12:20:09,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:20:09,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002908325] [2023-04-01 12:20:09,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:20:09,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:20:10,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:20:10,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:20:10,251 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:20:10,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002908325] [2023-04-01 12:20:10,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002908325] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:20:10,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:20:10,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 12:20:10,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829716066] [2023-04-01 12:20:10,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:20:10,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 12:20:10,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:20:10,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 12:20:10,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 12:20:10,283 INFO L87 Difference]: Start difference. First operand has 174 states, 111 states have (on average 1.4414414414414414) internal successors, (160), 116 states have internal predecessors, (160), 46 states have call successors, (46), 15 states have call predecessors, (46), 15 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:20:10,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:20:10,461 INFO L93 Difference]: Finished difference Result 343 states and 542 transitions. [2023-04-01 12:20:10,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:20:10,466 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-04-01 12:20:10,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:20:10,480 INFO L225 Difference]: With dead ends: 343 [2023-04-01 12:20:10,480 INFO L226 Difference]: Without dead ends: 177 [2023-04-01 12:20:10,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:20:10,491 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 6 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:20:10,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 666 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:20:10,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2023-04-01 12:20:10,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 175. [2023-04-01 12:20:10,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 113 states have (on average 1.415929203539823) internal successors, (160), 117 states have internal predecessors, (160), 46 states have call successors, (46), 16 states have call predecessors, (46), 15 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2023-04-01 12:20:10,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 251 transitions. [2023-04-01 12:20:10,539 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 251 transitions. Word has length 20 [2023-04-01 12:20:10,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:20:10,539 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 251 transitions. [2023-04-01 12:20:10,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:20:10,540 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 251 transitions. [2023-04-01 12:20:10,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 12:20:10,541 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:20:10,541 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:20:10,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 12:20:10,542 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:20:10,542 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:20:10,542 INFO L85 PathProgramCache]: Analyzing trace with hash -211151364, now seen corresponding path program 1 times [2023-04-01 12:20:10,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:20:10,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988813016] [2023-04-01 12:20:10,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:20:10,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:20:10,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:20:10,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:20:10,611 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:20:10,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988813016] [2023-04-01 12:20:10,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988813016] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:20:10,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:20:10,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 12:20:10,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596860364] [2023-04-01 12:20:10,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:20:10,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 12:20:10,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:20:10,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 12:20:10,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 12:20:10,614 INFO L87 Difference]: Start difference. First operand 175 states and 251 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:20:10,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:20:10,752 INFO L93 Difference]: Finished difference Result 356 states and 518 transitions. [2023-04-01 12:20:10,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:20:10,753 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2023-04-01 12:20:10,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:20:10,755 INFO L225 Difference]: With dead ends: 356 [2023-04-01 12:20:10,756 INFO L226 Difference]: Without dead ends: 189 [2023-04-01 12:20:10,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:20:10,758 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 22 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:20:10,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 676 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:20:10,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2023-04-01 12:20:10,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 187. [2023-04-01 12:20:10,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 123 states have (on average 1.4065040650406504) internal successors, (173), 127 states have internal predecessors, (173), 47 states have call successors, (47), 17 states have call predecessors, (47), 16 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2023-04-01 12:20:10,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 266 transitions. [2023-04-01 12:20:10,790 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 266 transitions. Word has length 21 [2023-04-01 12:20:10,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:20:10,790 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 266 transitions. [2023-04-01 12:20:10,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:20:10,791 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 266 transitions. [2023-04-01 12:20:10,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-01 12:20:10,792 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:20:10,792 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:20:10,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 12:20:10,793 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:20:10,793 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:20:10,793 INFO L85 PathProgramCache]: Analyzing trace with hash 429947526, now seen corresponding path program 1 times [2023-04-01 12:20:10,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:20:10,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352024510] [2023-04-01 12:20:10,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:20:10,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:20:10,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:20:10,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:20:10,898 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:20:10,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352024510] [2023-04-01 12:20:10,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352024510] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:20:10,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:20:10,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:20:10,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069903202] [2023-04-01 12:20:10,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:20:10,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:20:10,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:20:10,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:20:10,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:20:10,902 INFO L87 Difference]: Start difference. First operand 187 states and 266 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 12:20:10,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:20:10,956 INFO L93 Difference]: Finished difference Result 388 states and 564 transitions. [2023-04-01 12:20:10,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:20:10,956 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2023-04-01 12:20:10,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:20:10,960 INFO L225 Difference]: With dead ends: 388 [2023-04-01 12:20:10,960 INFO L226 Difference]: Without dead ends: 216 [2023-04-01 12:20:10,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:20:10,967 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 22 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:20:10,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 461 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:20:10,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2023-04-01 12:20:10,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 189. [2023-04-01 12:20:10,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 125 states have (on average 1.4) internal successors, (175), 129 states have internal predecessors, (175), 47 states have call successors, (47), 17 states have call predecessors, (47), 16 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2023-04-01 12:20:10,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 268 transitions. [2023-04-01 12:20:10,995 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 268 transitions. Word has length 28 [2023-04-01 12:20:10,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:20:10,995 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 268 transitions. [2023-04-01 12:20:10,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 12:20:10,995 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 268 transitions. [2023-04-01 12:20:10,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-04-01 12:20:10,997 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:20:10,997 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:20:10,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 12:20:10,997 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:20:10,997 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:20:10,997 INFO L85 PathProgramCache]: Analyzing trace with hash -724649492, now seen corresponding path program 1 times [2023-04-01 12:20:10,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:20:10,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442968224] [2023-04-01 12:20:10,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:20:10,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:20:11,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:20:11,127 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:20:11,127 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:20:11,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442968224] [2023-04-01 12:20:11,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442968224] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:20:11,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:20:11,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:20:11,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114897491] [2023-04-01 12:20:11,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:20:11,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:20:11,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:20:11,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:20:11,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:20:11,130 INFO L87 Difference]: Start difference. First operand 189 states and 268 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 12:20:11,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:20:11,230 INFO L93 Difference]: Finished difference Result 366 states and 523 transitions. [2023-04-01 12:20:11,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:20:11,231 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2023-04-01 12:20:11,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:20:11,233 INFO L225 Difference]: With dead ends: 366 [2023-04-01 12:20:11,233 INFO L226 Difference]: Without dead ends: 197 [2023-04-01 12:20:11,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:20:11,234 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 2 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 906 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:20:11,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 906 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:20:11,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2023-04-01 12:20:11,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 193. [2023-04-01 12:20:11,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 128 states have (on average 1.390625) internal successors, (178), 132 states have internal predecessors, (178), 47 states have call successors, (47), 17 states have call predecessors, (47), 17 states have return successors, (47), 47 states have call predecessors, (47), 46 states have call successors, (47) [2023-04-01 12:20:11,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 272 transitions. [2023-04-01 12:20:11,258 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 272 transitions. Word has length 36 [2023-04-01 12:20:11,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:20:11,258 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 272 transitions. [2023-04-01 12:20:11,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 12:20:11,258 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 272 transitions. [2023-04-01 12:20:11,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-01 12:20:11,264 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:20:11,264 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:20:11,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 12:20:11,265 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:20:11,265 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:20:11,265 INFO L85 PathProgramCache]: Analyzing trace with hash -15145536, now seen corresponding path program 1 times [2023-04-01 12:20:11,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:20:11,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930619861] [2023-04-01 12:20:11,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:20:11,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:20:11,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:20:11,330 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:20:11,331 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:20:11,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930619861] [2023-04-01 12:20:11,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930619861] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:20:11,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055064776] [2023-04-01 12:20:11,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:20:11,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:20:11,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:20:11,341 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) [2023-04-01 12:20:11,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 12:20:11,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:20:11,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 12:20:11,512 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:20:11,558 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:20:11,559 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 12:20:11,613 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:20:11,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055064776] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 12:20:11,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1714143931] [2023-04-01 12:20:11,663 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2023-04-01 12:20:11,664 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 12:20:11,667 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 12:20:11,671 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 12:20:11,672 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 12:20:12,783 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 147 for LOIs [2023-04-01 12:20:12,878 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 91 for LOIs [2023-04-01 12:20:12,922 INFO L197 IcfgInterpreter]: Interpreting procedure init with input of size 89 for LOIs [2023-04-01 12:20:13,379 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 72 for LOIs [2023-04-01 12:20:14,612 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2023-04-01 12:20:15,080 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2023-04-01 12:20:15,962 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2023-04-01 12:20:16,208 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2023-04-01 12:20:16,470 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 82 for LOIs [2023-04-01 12:20:16,535 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 12:20:20,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1714143931] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:20:20,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-04-01 12:20:20,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [4, 4, 4] total 27 [2023-04-01 12:20:20,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530820892] [2023-04-01 12:20:20,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:20:20,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-04-01 12:20:20,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:20:20,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-04-01 12:20:20,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2023-04-01 12:20:20,794 INFO L87 Difference]: Start difference. First operand 193 states and 272 transitions. Second operand has 23 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 15 states have internal predecessors, (24), 8 states have call successors, (8), 6 states have call predecessors, (8), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 12:20:31,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:20:31,234 INFO L93 Difference]: Finished difference Result 443 states and 622 transitions. [2023-04-01 12:20:31,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-01 12:20:31,234 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 15 states have internal predecessors, (24), 8 states have call successors, (8), 6 states have call predecessors, (8), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 38 [2023-04-01 12:20:31,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:20:31,236 INFO L225 Difference]: With dead ends: 443 [2023-04-01 12:20:31,236 INFO L226 Difference]: Without dead ends: 263 [2023-04-01 12:20:31,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=253, Invalid=1639, Unknown=0, NotChecked=0, Total=1892 [2023-04-01 12:20:31,239 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 365 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 2367 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 2479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 2367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-04-01 12:20:31,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [387 Valid, 332 Invalid, 2479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 2367 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-04-01 12:20:31,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2023-04-01 12:20:31,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 250. [2023-04-01 12:20:31,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 171 states have (on average 1.3742690058479532) internal successors, (235), 176 states have internal predecessors, (235), 54 states have call successors, (54), 24 states have call predecessors, (54), 24 states have return successors, (54), 53 states have call predecessors, (54), 53 states have call successors, (54) [2023-04-01 12:20:31,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 343 transitions. [2023-04-01 12:20:31,301 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 343 transitions. Word has length 38 [2023-04-01 12:20:31,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:20:31,301 INFO L495 AbstractCegarLoop]: Abstraction has 250 states and 343 transitions. [2023-04-01 12:20:31,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 15 states have internal predecessors, (24), 8 states have call successors, (8), 6 states have call predecessors, (8), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 12:20:31,302 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 343 transitions. [2023-04-01 12:20:31,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-01 12:20:31,303 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:20:31,303 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:20:31,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 12:20:31,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:20:31,530 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:20:31,530 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:20:31,531 INFO L85 PathProgramCache]: Analyzing trace with hash -611850451, now seen corresponding path program 1 times [2023-04-01 12:20:31,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:20:31,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320100084] [2023-04-01 12:20:31,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:20:31,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:20:31,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:20:31,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:20:31,657 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:20:31,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320100084] [2023-04-01 12:20:31,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320100084] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:20:31,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:20:31,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 12:20:31,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496237761] [2023-04-01 12:20:31,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:20:31,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 12:20:31,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:20:31,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 12:20:31,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 12:20:31,659 INFO L87 Difference]: Start difference. First operand 250 states and 343 transitions. Second operand has 6 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 12:20:31,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:20:31,788 INFO L93 Difference]: Finished difference Result 386 states and 536 transitions. [2023-04-01 12:20:31,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 12:20:31,788 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2023-04-01 12:20:31,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:20:31,793 INFO L225 Difference]: With dead ends: 386 [2023-04-01 12:20:31,793 INFO L226 Difference]: Without dead ends: 246 [2023-04-01 12:20:31,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 12:20:31,797 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 3 mSDsluCounter, 873 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1097 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:20:31,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 1097 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:20:31,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2023-04-01 12:20:31,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 246. [2023-04-01 12:20:31,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 168 states have (on average 1.3630952380952381) internal successors, (229), 173 states have internal predecessors, (229), 54 states have call successors, (54), 24 states have call predecessors, (54), 23 states have return successors, (53), 52 states have call predecessors, (53), 53 states have call successors, (53) [2023-04-01 12:20:31,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 336 transitions. [2023-04-01 12:20:31,861 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 336 transitions. Word has length 41 [2023-04-01 12:20:31,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:20:31,861 INFO L495 AbstractCegarLoop]: Abstraction has 246 states and 336 transitions. [2023-04-01 12:20:31,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 12:20:31,861 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 336 transitions. [2023-04-01 12:20:31,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-04-01 12:20:31,863 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:20:31,863 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:20:31,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 12:20:31,863 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:20:31,864 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:20:31,864 INFO L85 PathProgramCache]: Analyzing trace with hash -787440163, now seen corresponding path program 1 times [2023-04-01 12:20:31,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:20:31,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990699789] [2023-04-01 12:20:31,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:20:31,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:20:31,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:20:31,957 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 12:20:31,958 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:20:31,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990699789] [2023-04-01 12:20:31,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990699789] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:20:31,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639437670] [2023-04-01 12:20:31,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:20:31,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:20:31,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:20:31,967 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) [2023-04-01 12:20:31,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 12:20:32,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:20:32,075 INFO L262 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 12:20:32,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:20:32,091 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 12:20:32,092 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 12:20:32,123 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 12:20:32,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639437670] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 12:20:32,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [512071689] [2023-04-01 12:20:32,126 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2023-04-01 12:20:32,126 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 12:20:32,127 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 12:20:32,127 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 12:20:32,127 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 12:20:32,526 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 147 for LOIs [2023-04-01 12:20:32,592 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 91 for LOIs [2023-04-01 12:20:32,621 INFO L197 IcfgInterpreter]: Interpreting procedure init with input of size 89 for LOIs [2023-04-01 12:20:33,296 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 68 for LOIs [2023-04-01 12:20:38,903 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 70 for LOIs [2023-04-01 12:20:39,075 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 12:20:44,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [512071689] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:20:44,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-04-01 12:20:44,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [4, 4, 4] total 29 [2023-04-01 12:20:44,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48755967] [2023-04-01 12:20:44,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:20:44,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-01 12:20:44,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:20:44,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-01 12:20:44,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2023-04-01 12:20:44,274 INFO L87 Difference]: Start difference. First operand 246 states and 336 transitions. Second operand has 25 states, 20 states have (on average 1.35) internal successors, (27), 16 states have internal predecessors, (27), 8 states have call successors, (8), 6 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 12:20:58,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:20:58,176 INFO L93 Difference]: Finished difference Result 470 states and 649 transitions. [2023-04-01 12:20:58,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-04-01 12:20:58,177 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 20 states have (on average 1.35) internal successors, (27), 16 states have internal predecessors, (27), 8 states have call successors, (8), 6 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 50 [2023-04-01 12:20:58,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:20:58,179 INFO L225 Difference]: With dead ends: 470 [2023-04-01 12:20:58,179 INFO L226 Difference]: Without dead ends: 253 [2023-04-01 12:20:58,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 123 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=291, Invalid=2159, Unknown=0, NotChecked=0, Total=2450 [2023-04-01 12:20:58,181 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 271 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 3048 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 3138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 3048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-04-01 12:20:58,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [293 Valid, 479 Invalid, 3138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 3048 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-04-01 12:20:58,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2023-04-01 12:20:58,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 243. [2023-04-01 12:20:58,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 166 states have (on average 1.3373493975903614) internal successors, (222), 171 states have internal predecessors, (222), 52 states have call successors, (52), 25 states have call predecessors, (52), 24 states have return successors, (51), 50 states have call predecessors, (51), 51 states have call successors, (51) [2023-04-01 12:20:58,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 325 transitions. [2023-04-01 12:20:58,233 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 325 transitions. Word has length 50 [2023-04-01 12:20:58,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:20:58,233 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 325 transitions. [2023-04-01 12:20:58,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 20 states have (on average 1.35) internal successors, (27), 16 states have internal predecessors, (27), 8 states have call successors, (8), 6 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 12:20:58,234 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 325 transitions. [2023-04-01 12:20:58,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-01 12:20:58,234 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:20:58,235 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:20:58,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 12:20:58,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-04-01 12:20:58,441 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:20:58,441 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:20:58,441 INFO L85 PathProgramCache]: Analyzing trace with hash -77070592, now seen corresponding path program 1 times [2023-04-01 12:20:58,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:20:58,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918208996] [2023-04-01 12:20:58,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:20:58,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:20:58,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:20:58,523 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 12:20:58,523 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:20:58,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918208996] [2023-04-01 12:20:58,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918208996] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:20:58,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478880709] [2023-04-01 12:20:58,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:20:58,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:20:58,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:20:58,525 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) [2023-04-01 12:20:58,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 12:20:58,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:20:58,643 INFO L262 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 12:20:58,646 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:20:58,664 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 12:20:58,664 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 12:20:58,698 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 12:20:58,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478880709] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 12:20:58,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1009303267] [2023-04-01 12:20:58,700 INFO L159 IcfgInterpreter]: Started Sifa with 42 locations of interest [2023-04-01 12:20:58,700 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 12:20:58,700 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 12:20:58,701 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 12:20:58,701 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 12:20:59,042 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 147 for LOIs [2023-04-01 12:20:59,107 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 91 for LOIs [2023-04-01 12:20:59,136 INFO L197 IcfgInterpreter]: Interpreting procedure init with input of size 89 for LOIs [2023-04-01 12:20:59,642 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 68 for LOIs