/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 IntervalDomain -i ../sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.3.ufo.BOUNDED-6.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 00:10:12,881 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 00:10:12,882 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 00:10:12,901 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 00:10:12,902 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 00:10:12,902 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 00:10:12,903 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 00:10:12,904 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 00:10:12,905 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 00:10:12,906 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 00:10:12,906 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 00:10:12,907 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 00:10:12,907 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 00:10:12,908 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 00:10:12,908 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 00:10:12,909 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 00:10:12,910 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 00:10:12,910 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 00:10:12,911 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 00:10:12,912 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 00:10:12,913 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 00:10:12,918 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 00:10:12,919 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 00:10:12,920 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 00:10:12,922 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 00:10:12,922 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 00:10:12,922 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 00:10:12,923 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 00:10:12,923 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 00:10:12,924 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2023-04-01 00:10:12,927 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 00:10:12,927 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 00:10:12,928 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 00:10:12,933 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 00:10:12,962 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 00:10:12,962 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 00:10:12,962 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 00:10:12,962 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 00:10:12,963 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 00:10:12,963 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 00:10:12,963 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 00:10:12,963 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 00:10:12,963 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 00:10:12,963 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 00:10:12,964 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 00:10:12,964 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 00:10:12,964 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 00:10:12,964 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 00:10:12,964 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 00:10:12,964 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 00:10:12,965 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 00:10:12,965 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 00:10:12,965 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 00:10:12,965 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 00:10:12,965 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 00:10:12,965 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 00:10:12,965 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 00:10:12,966 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 00:10:12,966 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 00:10:12,966 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 00:10:12,966 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 00:10:12,966 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 00:10:12,966 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 00:10:12,966 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 00:10:12,966 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 00:10:12,967 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 00:10:12,967 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 00:10:12,967 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 00:10:12,967 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 00:10:12,967 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 00:10:12,967 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 00:10:12,967 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 00:10:12,967 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 00:10:12,967 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 00:10:12,967 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 00:10:12,967 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-04-01 00:10:13,151 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 00:10:13,179 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 00:10:13,180 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 00:10:13,181 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 00:10:13,182 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 00:10:13,182 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.3.ufo.BOUNDED-6.pals.c [2023-04-01 00:10:14,097 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 00:10:14,317 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 00:10:14,318 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.3.ufo.BOUNDED-6.pals.c [2023-04-01 00:10:14,326 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/796bd23de/0666ad2b108642ec98ba014ae11bdb43/FLAGfa61dc32b [2023-04-01 00:10:14,337 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/796bd23de/0666ad2b108642ec98ba014ae11bdb43 [2023-04-01 00:10:14,340 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 00:10:14,341 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 00:10:14,344 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 00:10:14,344 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 00:10:14,346 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 00:10:14,347 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:10:14" (1/1) ... [2023-04-01 00:10:14,347 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7683f80b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:10:14, skipping insertion in model container [2023-04-01 00:10:14,348 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:10:14" (1/1) ... [2023-04-01 00:10:14,353 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 00:10:14,390 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 00:10:14,546 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_floodmax.3.3.ufo.BOUNDED-6.pals.c[12764,12777] [2023-04-01 00:10:14,548 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 00:10:14,560 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 00:10:14,605 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_floodmax.3.3.ufo.BOUNDED-6.pals.c[12764,12777] [2023-04-01 00:10:14,605 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 00:10:14,615 INFO L208 MainTranslator]: Completed translation [2023-04-01 00:10:14,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:10:14 WrapperNode [2023-04-01 00:10:14,615 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 00:10:14,616 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 00:10:14,616 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 00:10:14,616 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 00:10:14,624 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:10:14" (1/1) ... [2023-04-01 00:10:14,624 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:10:14" (1/1) ... [2023-04-01 00:10:14,632 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:10:14" (1/1) ... [2023-04-01 00:10:14,633 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:10:14" (1/1) ... [2023-04-01 00:10:14,641 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:10:14" (1/1) ... [2023-04-01 00:10:14,647 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:10:14" (1/1) ... [2023-04-01 00:10:14,649 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:10:14" (1/1) ... [2023-04-01 00:10:14,650 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:10:14" (1/1) ... [2023-04-01 00:10:14,653 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 00:10:14,653 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 00:10:14,653 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 00:10:14,653 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 00:10:14,654 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:10:14" (1/1) ... [2023-04-01 00:10:14,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 00:10:14,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 00:10:14,674 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 00:10:14,676 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 00:10:14,701 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 00:10:14,701 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 00:10:14,701 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 00:10:14,701 INFO L138 BoogieDeclarations]: Found implementation of procedure node1 [2023-04-01 00:10:14,701 INFO L138 BoogieDeclarations]: Found implementation of procedure node2 [2023-04-01 00:10:14,701 INFO L138 BoogieDeclarations]: Found implementation of procedure node3 [2023-04-01 00:10:14,701 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2023-04-01 00:10:14,701 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2023-04-01 00:10:14,701 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 00:10:14,702 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2023-04-01 00:10:14,702 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 00:10:14,702 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 00:10:14,702 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 00:10:14,702 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 00:10:14,702 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 00:10:14,702 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 00:10:14,702 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 00:10:14,702 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 00:10:14,702 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 00:10:14,702 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 00:10:14,702 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 00:10:14,702 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 00:10:14,703 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 00:10:14,703 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 00:10:14,703 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 00:10:14,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 00:10:14,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 00:10:14,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 00:10:14,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 00:10:14,703 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 00:10:14,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 00:10:14,779 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 00:10:14,780 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 00:10:15,199 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 00:10:15,504 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 00:10:15,504 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 00:10:15,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:10:15 BoogieIcfgContainer [2023-04-01 00:10:15,507 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 00:10:15,509 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 00:10:15,509 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 00:10:15,511 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 00:10:15,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:10:14" (1/3) ... [2023-04-01 00:10:15,512 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1554d5a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:10:15, skipping insertion in model container [2023-04-01 00:10:15,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:10:14" (2/3) ... [2023-04-01 00:10:15,512 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1554d5a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:10:15, skipping insertion in model container [2023-04-01 00:10:15,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:10:15" (3/3) ... [2023-04-01 00:10:15,513 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.3.ufo.BOUNDED-6.pals.c [2023-04-01 00:10:15,524 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 00:10:15,524 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 00:10:15,563 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 00:10:15,568 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;@d0c47b1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 00:10:15,568 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 00:10:15,571 INFO L276 IsEmpty]: Start isEmpty. Operand has 47 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 30 states have internal predecessors, (42), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 00:10:15,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-01 00:10:15,577 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:10:15,578 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] [2023-04-01 00:10:15,579 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:10:15,583 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:10:15,583 INFO L85 PathProgramCache]: Analyzing trace with hash 466152659, now seen corresponding path program 1 times [2023-04-01 00:10:15,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:10:15,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984535833] [2023-04-01 00:10:15,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:10:15,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:10:15,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:10:17,871 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 00:10:17,871 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:10:17,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984535833] [2023-04-01 00:10:17,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984535833] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:10:17,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:10:17,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-04-01 00:10:17,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435342793] [2023-04-01 00:10:17,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:10:17,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 00:10:17,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:10:17,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 00:10:17,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2023-04-01 00:10:17,912 INFO L87 Difference]: Start difference. First operand has 47 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 30 states have internal predecessors, (42), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 15 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-01 00:10:18,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:10:18,522 INFO L93 Difference]: Finished difference Result 119 states and 148 transitions. [2023-04-01 00:10:18,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-01 00:10:18,524 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 30 [2023-04-01 00:10:18,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:10:18,529 INFO L225 Difference]: With dead ends: 119 [2023-04-01 00:10:18,529 INFO L226 Difference]: Without dead ends: 72 [2023-04-01 00:10:18,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=202, Invalid=554, Unknown=0, NotChecked=0, Total=756 [2023-04-01 00:10:18,534 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 313 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 00:10:18,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [316 Valid, 104 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 00:10:18,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-04-01 00:10:18,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 60. [2023-04-01 00:10:18,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 37 states have internal predecessors, (47), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2023-04-01 00:10:18,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2023-04-01 00:10:18,566 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 30 [2023-04-01 00:10:18,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:10:18,566 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2023-04-01 00:10:18,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-01 00:10:18,566 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2023-04-01 00:10:18,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-01 00:10:18,567 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:10:18,567 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] [2023-04-01 00:10:18,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 00:10:18,568 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:10:18,568 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:10:18,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1710709580, now seen corresponding path program 1 times [2023-04-01 00:10:18,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:10:18,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645980566] [2023-04-01 00:10:18,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:10:18,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:10:18,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:10:19,952 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 00:10:19,952 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:10:19,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645980566] [2023-04-01 00:10:19,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645980566] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:10:19,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:10:19,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-04-01 00:10:19,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714295765] [2023-04-01 00:10:19,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:10:19,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-01 00:10:19,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:10:19,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-01 00:10:19,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2023-04-01 00:10:19,955 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand has 16 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-01 00:10:20,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:10:20,613 INFO L93 Difference]: Finished difference Result 147 states and 180 transitions. [2023-04-01 00:10:20,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-04-01 00:10:20,614 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 31 [2023-04-01 00:10:20,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:10:20,615 INFO L225 Difference]: With dead ends: 147 [2023-04-01 00:10:20,615 INFO L226 Difference]: Without dead ends: 110 [2023-04-01 00:10:20,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=273, Invalid=849, Unknown=0, NotChecked=0, Total=1122 [2023-04-01 00:10:20,617 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 435 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 00:10:20,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [437 Valid, 105 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 00:10:20,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-04-01 00:10:20,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 70. [2023-04-01 00:10:20,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 46 states have (on average 1.4130434782608696) internal successors, (65), 47 states have internal predecessors, (65), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-01 00:10:20,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 88 transitions. [2023-04-01 00:10:20,636 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 88 transitions. Word has length 31 [2023-04-01 00:10:20,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:10:20,636 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 88 transitions. [2023-04-01 00:10:20,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-01 00:10:20,636 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 88 transitions. [2023-04-01 00:10:20,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-01 00:10:20,637 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:10:20,637 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] [2023-04-01 00:10:20,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 00:10:20,637 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:10:20,637 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:10:20,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1550987428, now seen corresponding path program 1 times [2023-04-01 00:10:20,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:10:20,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269378261] [2023-04-01 00:10:20,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:10:20,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:10:20,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:10:21,662 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 00:10:21,662 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:10:21,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269378261] [2023-04-01 00:10:21,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269378261] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:10:21,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:10:21,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 00:10:21,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897107460] [2023-04-01 00:10:21,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:10:21,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 00:10:21,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:10:21,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 00:10:21,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-04-01 00:10:21,666 INFO L87 Difference]: Start difference. First operand 70 states and 88 transitions. Second operand has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 00:10:21,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:10:21,944 INFO L93 Difference]: Finished difference Result 141 states and 171 transitions. [2023-04-01 00:10:21,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 00:10:21,944 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 32 [2023-04-01 00:10:21,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:10:21,949 INFO L225 Difference]: With dead ends: 141 [2023-04-01 00:10:21,949 INFO L226 Difference]: Without dead ends: 104 [2023-04-01 00:10:21,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-04-01 00:10:21,954 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 97 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 00:10:21,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 78 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 00:10:21,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-04-01 00:10:21,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 70. [2023-04-01 00:10:21,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 46 states have (on average 1.391304347826087) internal successors, (64), 47 states have internal predecessors, (64), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-01 00:10:21,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 87 transitions. [2023-04-01 00:10:21,974 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 87 transitions. Word has length 32 [2023-04-01 00:10:21,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:10:21,974 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 87 transitions. [2023-04-01 00:10:21,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 00:10:21,974 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 87 transitions. [2023-04-01 00:10:21,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-01 00:10:21,975 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:10:21,975 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] [2023-04-01 00:10:21,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 00:10:21,975 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:10:21,975 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:10:21,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1522331829, now seen corresponding path program 1 times [2023-04-01 00:10:21,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:10:21,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262964100] [2023-04-01 00:10:21,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:10:21,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:10:22,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:10:22,896 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 00:10:22,896 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:10:22,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262964100] [2023-04-01 00:10:22,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262964100] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:10:22,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:10:22,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 00:10:22,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481195208] [2023-04-01 00:10:22,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:10:22,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 00:10:22,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:10:22,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 00:10:22,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-04-01 00:10:22,898 INFO L87 Difference]: Start difference. First operand 70 states and 87 transitions. Second operand has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 00:10:23,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:10:23,212 INFO L93 Difference]: Finished difference Result 145 states and 174 transitions. [2023-04-01 00:10:23,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 00:10:23,212 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 33 [2023-04-01 00:10:23,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:10:23,213 INFO L225 Difference]: With dead ends: 145 [2023-04-01 00:10:23,213 INFO L226 Difference]: Without dead ends: 108 [2023-04-01 00:10:23,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-04-01 00:10:23,214 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 120 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 00:10:23,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 75 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 00:10:23,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-04-01 00:10:23,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 70. [2023-04-01 00:10:23,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 46 states have (on average 1.3695652173913044) internal successors, (63), 47 states have internal predecessors, (63), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-01 00:10:23,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 86 transitions. [2023-04-01 00:10:23,230 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 86 transitions. Word has length 33 [2023-04-01 00:10:23,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:10:23,231 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 86 transitions. [2023-04-01 00:10:23,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 00:10:23,231 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 86 transitions. [2023-04-01 00:10:23,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-01 00:10:23,233 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:10:23,233 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] [2023-04-01 00:10:23,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 00:10:23,233 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:10:23,233 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:10:23,233 INFO L85 PathProgramCache]: Analyzing trace with hash 308547261, now seen corresponding path program 1 times [2023-04-01 00:10:23,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:10:23,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334433863] [2023-04-01 00:10:23,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:10:23,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:10:23,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:10:24,508 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 00:10:24,509 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:10:24,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334433863] [2023-04-01 00:10:24,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334433863] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:10:24,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:10:24,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-04-01 00:10:24,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452898577] [2023-04-01 00:10:24,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:10:24,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-01 00:10:24,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:10:24,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-01 00:10:24,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2023-04-01 00:10:24,516 INFO L87 Difference]: Start difference. First operand 70 states and 86 transitions. Second operand has 16 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-01 00:10:25,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:10:25,244 INFO L93 Difference]: Finished difference Result 180 states and 221 transitions. [2023-04-01 00:10:25,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-04-01 00:10:25,244 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 35 [2023-04-01 00:10:25,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:10:25,248 INFO L225 Difference]: With dead ends: 180 [2023-04-01 00:10:25,248 INFO L226 Difference]: Without dead ends: 140 [2023-04-01 00:10:25,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=299, Invalid=891, Unknown=0, NotChecked=0, Total=1190 [2023-04-01 00:10:25,250 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 401 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 00:10:25,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 134 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 00:10:25,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-04-01 00:10:25,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 74. [2023-04-01 00:10:25,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 50 states have (on average 1.36) internal successors, (68), 51 states have internal predecessors, (68), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-01 00:10:25,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2023-04-01 00:10:25,275 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 35 [2023-04-01 00:10:25,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:10:25,276 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2023-04-01 00:10:25,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-01 00:10:25,277 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2023-04-01 00:10:25,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-04-01 00:10:25,281 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:10:25,281 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] [2023-04-01 00:10:25,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 00:10:25,281 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:10:25,281 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:10:25,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1057315053, now seen corresponding path program 1 times [2023-04-01 00:10:25,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:10:25,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504163551] [2023-04-01 00:10:25,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:10:25,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:10:25,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:10:25,759 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 00:10:25,760 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:10:25,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504163551] [2023-04-01 00:10:25,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504163551] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:10:25,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:10:25,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 00:10:25,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529862847] [2023-04-01 00:10:25,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:10:25,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 00:10:25,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:10:25,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 00:10:25,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-04-01 00:10:25,762 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 00:10:25,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:10:25,981 INFO L93 Difference]: Finished difference Result 145 states and 179 transitions. [2023-04-01 00:10:25,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 00:10:25,982 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 36 [2023-04-01 00:10:25,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:10:25,983 INFO L225 Difference]: With dead ends: 145 [2023-04-01 00:10:25,983 INFO L226 Difference]: Without dead ends: 100 [2023-04-01 00:10:25,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2023-04-01 00:10:25,987 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 91 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 00:10:25,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 73 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 00:10:25,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-04-01 00:10:26,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 71. [2023-04-01 00:10:26,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 48 states have internal predecessors, (57), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-01 00:10:26,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 80 transitions. [2023-04-01 00:10:26,005 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 80 transitions. Word has length 36 [2023-04-01 00:10:26,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:10:26,005 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 80 transitions. [2023-04-01 00:10:26,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 00:10:26,006 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 80 transitions. [2023-04-01 00:10:26,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-01 00:10:26,006 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:10:26,006 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] [2023-04-01 00:10:26,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 00:10:26,006 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:10:26,007 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:10:26,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1664650023, now seen corresponding path program 1 times [2023-04-01 00:10:26,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:10:26,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463695286] [2023-04-01 00:10:26,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:10:26,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:10:26,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:10:27,343 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 00:10:27,343 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:10:27,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463695286] [2023-04-01 00:10:27,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463695286] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:10:27,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:10:27,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-04-01 00:10:27,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155416330] [2023-04-01 00:10:27,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:10:27,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-01 00:10:27,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:10:27,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-01 00:10:27,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2023-04-01 00:10:27,344 INFO L87 Difference]: Start difference. First operand 71 states and 80 transitions. Second operand has 16 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-01 00:10:28,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:10:28,034 INFO L93 Difference]: Finished difference Result 156 states and 176 transitions. [2023-04-01 00:10:28,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-04-01 00:10:28,035 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 38 [2023-04-01 00:10:28,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:10:28,035 INFO L225 Difference]: With dead ends: 156 [2023-04-01 00:10:28,036 INFO L226 Difference]: Without dead ends: 117 [2023-04-01 00:10:28,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=299, Invalid=891, Unknown=0, NotChecked=0, Total=1190 [2023-04-01 00:10:28,037 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 315 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 00:10:28,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [318 Valid, 115 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 00:10:28,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-04-01 00:10:28,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 71. [2023-04-01 00:10:28,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 48 states have internal predecessors, (56), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-01 00:10:28,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2023-04-01 00:10:28,049 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 38 [2023-04-01 00:10:28,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:10:28,049 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2023-04-01 00:10:28,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-01 00:10:28,050 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2023-04-01 00:10:28,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-04-01 00:10:28,050 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:10:28,050 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] [2023-04-01 00:10:28,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 00:10:28,050 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:10:28,051 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:10:28,051 INFO L85 PathProgramCache]: Analyzing trace with hash 59660117, now seen corresponding path program 1 times [2023-04-01 00:10:28,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:10:28,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122407677] [2023-04-01 00:10:28,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:10:28,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:10:28,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:10:28,295 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 00:10:28,295 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:10:28,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122407677] [2023-04-01 00:10:28,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122407677] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:10:28,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:10:28,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 00:10:28,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765742140] [2023-04-01 00:10:28,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:10:28,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 00:10:28,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:10:28,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 00:10:28,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-04-01 00:10:28,296 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand has 9 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2023-04-01 00:10:28,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:10:28,451 INFO L93 Difference]: Finished difference Result 106 states and 121 transitions. [2023-04-01 00:10:28,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 00:10:28,452 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2023-04-01 00:10:28,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:10:28,453 INFO L225 Difference]: With dead ends: 106 [2023-04-01 00:10:28,453 INFO L226 Difference]: Without dead ends: 104 [2023-04-01 00:10:28,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-04-01 00:10:28,454 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 36 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:10:28,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 408 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 00:10:28,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-04-01 00:10:28,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 80. [2023-04-01 00:10:28,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 53 states have (on average 1.169811320754717) internal successors, (62), 55 states have internal predecessors, (62), 13 states have call successors, (13), 13 states have call predecessors, (13), 13 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2023-04-01 00:10:28,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2023-04-01 00:10:28,468 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 39 [2023-04-01 00:10:28,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:10:28,470 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2023-04-01 00:10:28,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2023-04-01 00:10:28,470 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2023-04-01 00:10:28,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-04-01 00:10:28,471 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:10:28,472 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] [2023-04-01 00:10:28,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 00:10:28,472 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:10:28,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:10:28,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1821725225, now seen corresponding path program 1 times [2023-04-01 00:10:28,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:10:28,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767493296] [2023-04-01 00:10:28,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:10:28,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:10:28,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:10:30,809 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 00:10:30,810 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:10:30,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767493296] [2023-04-01 00:10:30,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767493296] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 00:10:30,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809791675] [2023-04-01 00:10:30,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:10:30,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 00:10:30,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 00:10:30,811 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 00:10:30,815 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 00:10:31,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:10:31,022 INFO L262 TraceCheckSpWp]: Trace formula consists of 940 conjuncts, 78 conjunts are in the unsatisfiable core [2023-04-01 00:10:31,046 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 00:10:39,061 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:10:39,062 INFO L327 TraceCheckSpWp]: Computing backward predicates...