/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 OctagonDomain -i ../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 02:00:05,051 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 02:00:05,053 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 02:00:05,074 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 02:00:05,074 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 02:00:05,075 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 02:00:05,076 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 02:00:05,077 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 02:00:05,078 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 02:00:05,078 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 02:00:05,079 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 02:00:05,079 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 02:00:05,080 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 02:00:05,080 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 02:00:05,081 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 02:00:05,082 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 02:00:05,082 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 02:00:05,083 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 02:00:05,085 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 02:00:05,086 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 02:00:05,087 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 02:00:05,088 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 02:00:05,088 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 02:00:05,089 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 02:00:05,091 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 02:00:05,092 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 02:00:05,092 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 02:00:05,092 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 02:00:05,093 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 02:00:05,093 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 02:00:05,093 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 02:00:05,094 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 02:00:05,094 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 02:00:05,095 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 02:00:05,095 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 02:00:05,096 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 02:00:05,096 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 02:00:05,096 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 02:00:05,096 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 02:00:05,097 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 02:00:05,097 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 02:00:05,098 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 [2023-04-03 02:00:05,113 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 02:00:05,114 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 02:00:05,114 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 02:00:05,114 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 02:00:05,114 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 02:00:05,115 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 02:00:05,115 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 02:00:05,115 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 02:00:05,115 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 02:00:05,115 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 02:00:05,115 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 02:00:05,115 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 02:00:05,115 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 02:00:05,115 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 02:00:05,115 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 02:00:05,116 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 02:00:05,116 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 02:00:05,116 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 02:00:05,116 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 02:00:05,116 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 02:00:05,116 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 02:00:05,117 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 02:00:05,117 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 02:00:05,117 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 02:00:05,117 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 02:00:05,117 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 02:00:05,117 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 02:00:05,117 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 02:00:05,117 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 02:00:05,118 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 02:00:05,118 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 02:00:05,118 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 02:00:05,118 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:00:05,118 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 02:00:05,118 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 02:00:05,118 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 02:00:05,118 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 02:00:05,119 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 02:00:05,119 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 02:00:05,119 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 02:00:05,119 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 02:00:05,119 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 02:00:05,327 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 02:00:05,351 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 02:00:05,353 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 02:00:05,354 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 02:00:05,354 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 02:00:05,355 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c [2023-04-03 02:00:06,371 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 02:00:06,549 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 02:00:06,549 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c [2023-04-03 02:00:06,560 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef398def7/a4442f5e71d3404faf356487928dc08a/FLAGbcbf1513d [2023-04-03 02:00:06,570 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef398def7/a4442f5e71d3404faf356487928dc08a [2023-04-03 02:00:06,572 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 02:00:06,573 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 02:00:06,574 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 02:00:06,574 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 02:00:06,580 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 02:00:06,580 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:00:06" (1/1) ... [2023-04-03 02:00:06,581 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b6cb4ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:00:06, skipping insertion in model container [2023-04-03 02:00:06,581 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:00:06" (1/1) ... [2023-04-03 02:00:06,587 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 02:00:06,611 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 02:00:06,794 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_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c[14373,14386] [2023-04-03 02:00:06,797 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:00:06,804 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 02:00:06,916 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_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c[14373,14386] [2023-04-03 02:00:06,916 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:00:06,930 INFO L208 MainTranslator]: Completed translation [2023-04-03 02:00:06,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:00:06 WrapperNode [2023-04-03 02:00:06,931 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 02:00:06,932 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 02:00:06,932 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 02:00:06,932 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 02:00:06,940 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:00:06" (1/1) ... [2023-04-03 02:00:06,940 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:00:06" (1/1) ... [2023-04-03 02:00:06,947 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:00:06" (1/1) ... [2023-04-03 02:00:06,948 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:00:06" (1/1) ... [2023-04-03 02:00:06,962 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:00:06" (1/1) ... [2023-04-03 02:00:06,969 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:00:06" (1/1) ... [2023-04-03 02:00:06,976 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:00:06" (1/1) ... [2023-04-03 02:00:06,984 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:00:06" (1/1) ... [2023-04-03 02:00:06,987 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 02:00:06,988 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 02:00:06,988 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 02:00:06,988 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 02:00:06,988 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:00:06" (1/1) ... [2023-04-03 02:00:06,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:00:07,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:00:07,023 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) [2023-04-03 02:00:07,025 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 [2023-04-03 02:00:07,056 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 02:00:07,056 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 02:00:07,056 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 02:00:07,058 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 02:00:07,058 INFO L138 BoogieDeclarations]: Found implementation of procedure node1 [2023-04-03 02:00:07,058 INFO L138 BoogieDeclarations]: Found implementation of procedure node2 [2023-04-03 02:00:07,058 INFO L138 BoogieDeclarations]: Found implementation of procedure node3 [2023-04-03 02:00:07,058 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2023-04-03 02:00:07,058 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2023-04-03 02:00:07,058 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 02:00:07,058 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2023-04-03 02:00:07,058 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 02:00:07,058 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 02:00:07,058 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 02:00:07,058 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 02:00:07,059 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 02:00:07,059 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 02:00:07,059 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 02:00:07,059 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 02:00:07,059 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 02:00:07,059 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 02:00:07,060 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 02:00:07,060 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 02:00:07,060 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 02:00:07,060 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 02:00:07,060 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 02:00:07,060 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 02:00:07,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 02:00:07,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 02:00:07,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 02:00:07,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 02:00:07,060 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 02:00:07,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 02:00:07,170 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 02:00:07,172 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 02:00:07,642 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 02:00:08,074 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 02:00:08,074 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-03 02:00:08,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:00:08 BoogieIcfgContainer [2023-04-03 02:00:08,077 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 02:00:08,080 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 02:00:08,080 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 02:00:08,082 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 02:00:08,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 02:00:06" (1/3) ... [2023-04-03 02:00:08,083 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@244c2cdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:00:08, skipping insertion in model container [2023-04-03 02:00:08,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:00:06" (2/3) ... [2023-04-03 02:00:08,083 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@244c2cdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:00:08, skipping insertion in model container [2023-04-03 02:00:08,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:00:08" (3/3) ... [2023-04-03 02:00:08,087 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c [2023-04-03 02:00:08,102 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 02:00:08,103 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 02:00:08,147 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 02:00:08,152 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;@710b7078, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 02:00:08,153 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 02:00:08,156 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 31 states have (on average 1.4193548387096775) internal successors, (44), 32 states have internal predecessors, (44), 9 states have call successors, (9), 9 states have call predecessors, (9), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-03 02:00:08,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-04-03 02:00:08,162 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:00:08,163 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] [2023-04-03 02:00:08,164 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:00:08,170 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:00:08,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1901202102, now seen corresponding path program 1 times [2023-04-03 02:00:08,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:00:08,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386466929] [2023-04-03 02:00:08,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:00:08,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:00:08,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:00:11,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:00:11,130 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:00:11,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386466929] [2023-04-03 02:00:11,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386466929] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:00:11,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:00:11,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2023-04-03 02:00:11,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76088036] [2023-04-03 02:00:11,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:00:11,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-03 02:00:11,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:00:11,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-03 02:00:11,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2023-04-03 02:00:11,163 INFO L87 Difference]: Start difference. First operand has 51 states, 31 states have (on average 1.4193548387096775) internal successors, (44), 32 states have internal predecessors, (44), 9 states have call successors, (9), 9 states have call predecessors, (9), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 17 states, 9 states have (on average 2.0) internal successors, (18), 11 states have internal predecessors, (18), 7 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-03 02:00:12,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:00:12,075 INFO L93 Difference]: Finished difference Result 123 states and 152 transitions. [2023-04-03 02:00:12,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-03 02:00:12,078 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 9 states have (on average 2.0) internal successors, (18), 11 states have internal predecessors, (18), 7 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 34 [2023-04-03 02:00:12,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:00:12,087 INFO L225 Difference]: With dead ends: 123 [2023-04-03 02:00:12,088 INFO L226 Difference]: Without dead ends: 76 [2023-04-03 02:00:12,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=216, Invalid=714, Unknown=0, NotChecked=0, Total=930 [2023-04-03 02:00:12,093 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 270 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-03 02:00:12,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 176 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-03 02:00:12,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-04-03 02:00:12,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 64. [2023-04-03 02:00:12,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 39 states have internal predecessors, (49), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2023-04-03 02:00:12,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2023-04-03 02:00:12,137 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 34 [2023-04-03 02:00:12,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:00:12,137 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2023-04-03 02:00:12,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 9 states have (on average 2.0) internal successors, (18), 11 states have internal predecessors, (18), 7 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-03 02:00:12,138 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2023-04-03 02:00:12,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-03 02:00:12,139 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:00:12,139 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] [2023-04-03 02:00:12,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 02:00:12,140 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:00:12,140 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:00:12,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1112947322, now seen corresponding path program 1 times [2023-04-03 02:00:12,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:00:12,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694981073] [2023-04-03 02:00:12,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:00:12,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:00:12,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:00:13,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:00:13,446 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:00:13,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694981073] [2023-04-03 02:00:13,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694981073] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:00:13,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:00:13,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 02:00:13,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737495184] [2023-04-03 02:00:13,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:00:13,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 02:00:13,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:00:13,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 02:00:13,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-04-03 02:00:13,452 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand has 11 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 9 states have internal predecessors, (19), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-03 02:00:13,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:00:13,831 INFO L93 Difference]: Finished difference Result 128 states and 153 transitions. [2023-04-03 02:00:13,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:00:13,831 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 9 states have internal predecessors, (19), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 35 [2023-04-03 02:00:13,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:00:13,833 INFO L225 Difference]: With dead ends: 128 [2023-04-03 02:00:13,833 INFO L226 Difference]: Without dead ends: 91 [2023-04-03 02:00:13,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-04-03 02:00:13,834 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 135 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:00:13,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 106 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 02:00:13,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-04-03 02:00:13,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 65. [2023-04-03 02:00:13,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 40 states have internal predecessors, (50), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2023-04-03 02:00:13,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 76 transitions. [2023-04-03 02:00:13,848 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 76 transitions. Word has length 35 [2023-04-03 02:00:13,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:00:13,849 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 76 transitions. [2023-04-03 02:00:13,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 9 states have internal predecessors, (19), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-03 02:00:13,849 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 76 transitions. [2023-04-03 02:00:13,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-04-03 02:00:13,850 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:00:13,850 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] [2023-04-03 02:00:13,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 02:00:13,851 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:00:13,851 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:00:13,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1340141517, now seen corresponding path program 1 times [2023-04-03 02:00:13,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:00:13,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859637716] [2023-04-03 02:00:13,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:00:13,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:00:13,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:00:15,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:00:15,050 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:00:15,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859637716] [2023-04-03 02:00:15,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859637716] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:00:15,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:00:15,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 02:00:15,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024293721] [2023-04-03 02:00:15,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:00:15,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 02:00:15,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:00:15,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 02:00:15,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-04-03 02:00:15,054 INFO L87 Difference]: Start difference. First operand 65 states and 76 transitions. Second operand has 11 states, 7 states have (on average 2.857142857142857) internal successors, (20), 9 states have internal predecessors, (20), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-03 02:00:15,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:00:15,402 INFO L93 Difference]: Finished difference Result 135 states and 160 transitions. [2023-04-03 02:00:15,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:00:15,402 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 2.857142857142857) internal successors, (20), 9 states have internal predecessors, (20), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 36 [2023-04-03 02:00:15,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:00:15,404 INFO L225 Difference]: With dead ends: 135 [2023-04-03 02:00:15,404 INFO L226 Difference]: Without dead ends: 98 [2023-04-03 02:00:15,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-04-03 02:00:15,405 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 98 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:00:15,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 107 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 02:00:15,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-04-03 02:00:15,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 66. [2023-04-03 02:00:15,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 40 states have (on average 1.275) internal successors, (51), 41 states have internal predecessors, (51), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2023-04-03 02:00:15,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 77 transitions. [2023-04-03 02:00:15,418 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 77 transitions. Word has length 36 [2023-04-03 02:00:15,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:00:15,418 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 77 transitions. [2023-04-03 02:00:15,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 2.857142857142857) internal successors, (20), 9 states have internal predecessors, (20), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-03 02:00:15,418 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 77 transitions. [2023-04-03 02:00:15,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-04-03 02:00:15,419 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:00:15,419 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] [2023-04-03 02:00:15,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 02:00:15,419 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:00:15,419 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:00:15,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1313484431, now seen corresponding path program 1 times [2023-04-03 02:00:15,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:00:15,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529426774] [2023-04-03 02:00:15,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:00:15,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:00:15,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:00:16,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:00:16,448 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:00:16,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529426774] [2023-04-03 02:00:16,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529426774] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:00:16,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:00:16,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 02:00:16,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282773432] [2023-04-03 02:00:16,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:00:16,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 02:00:16,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:00:16,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 02:00:16,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-04-03 02:00:16,451 INFO L87 Difference]: Start difference. First operand 66 states and 77 transitions. Second operand has 11 states, 7 states have (on average 3.0) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-03 02:00:16,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:00:16,805 INFO L93 Difference]: Finished difference Result 142 states and 167 transitions. [2023-04-03 02:00:16,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:00:16,805 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 3.0) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 37 [2023-04-03 02:00:16,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:00:16,806 INFO L225 Difference]: With dead ends: 142 [2023-04-03 02:00:16,806 INFO L226 Difference]: Without dead ends: 105 [2023-04-03 02:00:16,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-04-03 02:00:16,808 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 151 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:00:16,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 101 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 02:00:16,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-04-03 02:00:16,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 67. [2023-04-03 02:00:16,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 42 states have internal predecessors, (52), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2023-04-03 02:00:16,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2023-04-03 02:00:16,819 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 37 [2023-04-03 02:00:16,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:00:16,819 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2023-04-03 02:00:16,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 3.0) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-03 02:00:16,819 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2023-04-03 02:00:16,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-04-03 02:00:16,820 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:00:16,820 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] [2023-04-03 02:00:16,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 02:00:16,820 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:00:16,821 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:00:16,821 INFO L85 PathProgramCache]: Analyzing trace with hash 375765047, now seen corresponding path program 1 times [2023-04-03 02:00:16,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:00:16,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639774254] [2023-04-03 02:00:16,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:00:16,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:00:16,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:00:18,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:00:18,175 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:00:18,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639774254] [2023-04-03 02:00:18,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639774254] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:00:18,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:00:18,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-04-03 02:00:18,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101555208] [2023-04-03 02:00:18,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:00:18,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-03 02:00:18,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:00:18,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-03 02:00:18,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2023-04-03 02:00:18,184 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 18 states, 10 states have (on average 2.3) internal successors, (23), 12 states have internal predecessors, (23), 7 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-03 02:00:19,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:00:19,105 INFO L93 Difference]: Finished difference Result 224 states and 272 transitions. [2023-04-03 02:00:19,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-04-03 02:00:19,106 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 10 states have (on average 2.3) internal successors, (23), 12 states have internal predecessors, (23), 7 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 39 [2023-04-03 02:00:19,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:00:19,107 INFO L225 Difference]: With dead ends: 224 [2023-04-03 02:00:19,107 INFO L226 Difference]: Without dead ends: 187 [2023-04-03 02:00:19,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=320, Invalid=1086, Unknown=0, NotChecked=0, Total=1406 [2023-04-03 02:00:19,109 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 394 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-03 02:00:19,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [399 Valid, 230 Invalid, 934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 818 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-03 02:00:19,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2023-04-03 02:00:19,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 110. [2023-04-03 02:00:19,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 72 states have (on average 1.3333333333333333) internal successors, (96), 75 states have internal predecessors, (96), 18 states have call successors, (18), 18 states have call predecessors, (18), 19 states have return successors, (23), 16 states have call predecessors, (23), 17 states have call successors, (23) [2023-04-03 02:00:19,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 137 transitions. [2023-04-03 02:00:19,143 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 137 transitions. Word has length 39 [2023-04-03 02:00:19,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:00:19,143 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 137 transitions. [2023-04-03 02:00:19,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 10 states have (on average 2.3) internal successors, (23), 12 states have internal predecessors, (23), 7 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-03 02:00:19,143 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 137 transitions. [2023-04-03 02:00:19,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-04-03 02:00:19,148 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:00:19,148 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] [2023-04-03 02:00:19,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 02:00:19,148 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:00:19,148 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:00:19,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1423667030, now seen corresponding path program 1 times [2023-04-03 02:00:19,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:00:19,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352526305] [2023-04-03 02:00:19,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:00:19,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:00:19,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:00:19,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:00:19,667 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:00:19,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352526305] [2023-04-03 02:00:19,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352526305] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:00:19,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:00:19,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 02:00:19,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598925273] [2023-04-03 02:00:19,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:00:19,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 02:00:19,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:00:19,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 02:00:19,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-03 02:00:19,669 INFO L87 Difference]: Start difference. First operand 110 states and 137 transitions. Second operand has 11 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-03 02:00:19,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:00:19,940 INFO L93 Difference]: Finished difference Result 180 states and 225 transitions. [2023-04-03 02:00:19,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:00:19,941 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 40 [2023-04-03 02:00:19,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:00:19,941 INFO L225 Difference]: With dead ends: 180 [2023-04-03 02:00:19,942 INFO L226 Difference]: Without dead ends: 100 [2023-04-03 02:00:19,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-03 02:00:19,943 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 139 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:00:19,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 95 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:00:19,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-04-03 02:00:19,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 72. [2023-04-03 02:00:19,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 47 states have internal predecessors, (55), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2023-04-03 02:00:19,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 81 transitions. [2023-04-03 02:00:19,953 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 81 transitions. Word has length 40 [2023-04-03 02:00:19,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:00:19,954 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 81 transitions. [2023-04-03 02:00:19,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-03 02:00:19,954 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 81 transitions. [2023-04-03 02:00:19,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-03 02:00:19,954 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:00:19,954 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, 1] [2023-04-03 02:00:19,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-03 02:00:19,954 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:00:19,955 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:00:19,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1659490000, now seen corresponding path program 1 times [2023-04-03 02:00:19,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:00:19,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129389670] [2023-04-03 02:00:19,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:00:19,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:00:20,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:00:21,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:00:21,373 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:00:21,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129389670] [2023-04-03 02:00:21,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129389670] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:00:21,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:00:21,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2023-04-03 02:00:21,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850778772] [2023-04-03 02:00:21,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:00:21,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-03 02:00:21,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:00:21,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-03 02:00:21,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2023-04-03 02:00:21,375 INFO L87 Difference]: Start difference. First operand 72 states and 81 transitions. Second operand has 17 states, 9 states have (on average 2.888888888888889) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-03 02:00:22,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:00:22,026 INFO L93 Difference]: Finished difference Result 141 states and 162 transitions. [2023-04-03 02:00:22,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-03 02:00:22,027 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 9 states have (on average 2.888888888888889) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 42 [2023-04-03 02:00:22,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:00:22,028 INFO L225 Difference]: With dead ends: 141 [2023-04-03 02:00:22,028 INFO L226 Difference]: Without dead ends: 101 [2023-04-03 02:00:22,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=221, Invalid=709, Unknown=0, NotChecked=0, Total=930 [2023-04-03 02:00:22,029 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 193 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-03 02:00:22,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 146 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-03 02:00:22,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-04-03 02:00:22,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 75. [2023-04-03 02:00:22,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 49 states have (on average 1.183673469387755) internal successors, (58), 50 states have internal predecessors, (58), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2023-04-03 02:00:22,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 84 transitions. [2023-04-03 02:00:22,045 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 84 transitions. Word has length 42 [2023-04-03 02:00:22,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:00:22,045 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 84 transitions. [2023-04-03 02:00:22,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 9 states have (on average 2.888888888888889) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-03 02:00:22,045 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 84 transitions. [2023-04-03 02:00:22,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-03 02:00:22,046 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:00:22,046 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, 1, 1] [2023-04-03 02:00:22,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-03 02:00:22,047 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:00:22,047 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:00:22,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1865376330, now seen corresponding path program 1 times [2023-04-03 02:00:22,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:00:22,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139766596] [2023-04-03 02:00:22,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:00:22,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:00:22,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:00:22,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:00:22,866 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:00:22,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139766596] [2023-04-03 02:00:22,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139766596] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:00:22,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:00:22,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-04-03 02:00:22,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389707284] [2023-04-03 02:00:22,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:00:22,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-03 02:00:22,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:00:22,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-03 02:00:22,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2023-04-03 02:00:22,868 INFO L87 Difference]: Start difference. First operand 75 states and 84 transitions. Second operand has 13 states, 8 states have (on average 3.375) internal successors, (27), 10 states have internal predecessors, (27), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-03 02:00:23,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:00:23,127 INFO L93 Difference]: Finished difference Result 110 states and 127 transitions. [2023-04-03 02:00:23,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-03 02:00:23,127 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 8 states have (on average 3.375) internal successors, (27), 10 states have internal predecessors, (27), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2023-04-03 02:00:23,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:00:23,128 INFO L225 Difference]: With dead ends: 110 [2023-04-03 02:00:23,128 INFO L226 Difference]: Without dead ends: 108 [2023-04-03 02:00:23,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2023-04-03 02:00:23,129 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 40 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:00:23,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 611 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:00:23,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-04-03 02:00:23,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 81. [2023-04-03 02:00:23,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 53 states have (on average 1.169811320754717) internal successors, (62), 54 states have internal predecessors, (62), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) [2023-04-03 02:00:23,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2023-04-03 02:00:23,143 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 43 [2023-04-03 02:00:23,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:00:23,143 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2023-04-03 02:00:23,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 8 states have (on average 3.375) internal successors, (27), 10 states have internal predecessors, (27), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-03 02:00:23,143 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2023-04-03 02:00:23,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-04-03 02:00:23,144 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:00:23,144 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:00:23,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-03 02:00:23,144 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:00:23,144 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:00:23,144 INFO L85 PathProgramCache]: Analyzing trace with hash -557968203, now seen corresponding path program 1 times [2023-04-03 02:00:23,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:00:23,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542695563] [2023-04-03 02:00:23,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:00:23,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:00:23,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:00:25,836 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-03 02:00:25,836 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:00:25,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542695563] [2023-04-03 02:00:25,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542695563] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:00:25,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569373117] [2023-04-03 02:00:25,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:00:25,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:00:25,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:00:25,837 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) [2023-04-03 02:00:25,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-03 02:00:26,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:00:26,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 1003 conjuncts, 84 conjunts are in the unsatisfiable core [2023-04-03 02:00:26,085 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:00:35,490 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:00:35,490 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 02:00:35,856 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 7864 disjunctions. This might take some time... [2023-04-03 02:00:38,879 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 7864 disjunctions.