/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 12:35:15,882 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 12:35:15,884 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 12:35:15,924 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 12:35:15,924 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 12:35:15,927 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 12:35:15,928 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 12:35:15,930 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 12:35:15,931 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 12:35:15,937 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 12:35:15,937 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 12:35:15,938 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 12:35:15,938 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 12:35:15,939 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 12:35:15,940 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 12:35:15,941 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 12:35:15,941 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 12:35:15,942 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 12:35:15,943 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 12:35:15,945 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 12:35:15,946 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 12:35:15,947 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 12:35:15,948 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 12:35:15,948 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 12:35:15,951 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 12:35:15,957 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 12:35:15,958 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 12:35:15,959 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 12:35:15,965 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 12:35:15,988 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 12:35:15,988 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 12:35:15,989 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 12:35:15,989 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 12:35:15,990 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 12:35:15,990 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 12:35:15,990 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 12:35:15,990 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 12:35:15,990 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 12:35:15,990 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 12:35:15,991 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 12:35:15,991 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 12:35:15,991 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 12:35:15,992 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 12:35:15,992 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 12:35:15,992 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 12:35:15,992 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 12:35:15,992 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 12:35:15,993 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 12:35:15,993 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 12:35:15,993 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 12:35:15,993 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 12:35:15,993 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 12:35:15,993 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 12:35:15,993 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 12:35:15,993 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 12:35:15,994 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 12:35:15,994 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 12:35:15,994 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 12:35:15,994 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 12:35:15,994 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 12:35:15,994 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 12:35:15,994 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:35:15,995 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 12:35:15,995 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 12:35:15,995 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 12:35:15,995 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 12:35:15,995 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 12:35:15,995 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 12:35:15,995 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 12:35:15,996 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 12:35:15,996 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 12:35:16,194 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 12:35:16,221 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 12:35:16,223 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 12:35:16,225 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 12:35:16,225 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 12:35:16,226 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c [2023-04-01 12:35:17,406 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 12:35:17,730 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 12:35:17,731 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c [2023-04-01 12:35:17,750 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29bc5a3f8/a89f36ac15844a07b6545290e603185a/FLAGc7750582d [2023-04-01 12:35:17,761 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29bc5a3f8/a89f36ac15844a07b6545290e603185a [2023-04-01 12:35:17,763 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 12:35:17,765 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 12:35:17,765 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 12:35:17,766 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 12:35:17,768 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 12:35:17,768 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:35:17" (1/1) ... [2023-04-01 12:35:17,769 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78d74928 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:35:17, skipping insertion in model container [2023-04-01 12:35:17,769 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:35:17" (1/1) ... [2023-04-01 12:35:17,775 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 12:35:17,881 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 12:35:18,443 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-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c[30249,30262] [2023-04-01 12:35:18,488 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-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c[33700,33713] [2023-04-01 12:35:18,661 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:35:18,678 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 12:35:18,993 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-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c[30249,30262] [2023-04-01 12:35:19,029 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-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c[33700,33713] [2023-04-01 12:35:19,156 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:35:19,177 INFO L208 MainTranslator]: Completed translation [2023-04-01 12:35:19,179 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:35:19 WrapperNode [2023-04-01 12:35:19,179 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 12:35:19,180 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 12:35:19,180 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 12:35:19,180 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 12:35:19,190 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:35:19" (1/1) ... [2023-04-01 12:35:19,191 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:35:19" (1/1) ... [2023-04-01 12:35:19,225 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:35:19" (1/1) ... [2023-04-01 12:35:19,225 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:35:19" (1/1) ... [2023-04-01 12:35:19,285 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:35:19" (1/1) ... [2023-04-01 12:35:19,306 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:35:19" (1/1) ... [2023-04-01 12:35:19,313 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:35:19" (1/1) ... [2023-04-01 12:35:19,323 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:35:19" (1/1) ... [2023-04-01 12:35:19,334 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 12:35:19,335 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 12:35:19,335 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 12:35:19,335 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 12:35:19,336 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:35:19" (1/1) ... [2023-04-01 12:35:19,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:35:19,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:35:19,363 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 12:35:19,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 12:35:19,402 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 12:35:19,402 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 12:35:19,402 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 12:35:19,402 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 12:35:19,402 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 12:35:19,402 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 12:35:19,402 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 12:35:19,403 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 12:35:19,403 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 12:35:19,403 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 12:35:19,403 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 12:35:19,403 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 12:35:19,403 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 12:35:19,403 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 12:35:19,404 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 12:35:19,404 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 12:35:19,404 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 12:35:19,404 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 12:35:19,404 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-01 12:35:19,404 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 12:35:19,404 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 12:35:19,404 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 12:35:19,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 12:35:19,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 12:35:19,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 12:35:19,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 12:35:19,405 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 12:35:19,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 12:35:19,625 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 12:35:19,627 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 12:35:21,679 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 12:35:22,815 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 12:35:22,815 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-01 12:35:22,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:35:22 BoogieIcfgContainer [2023-04-01 12:35:22,819 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 12:35:22,821 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 12:35:22,821 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 12:35:22,823 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 12:35:22,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:35:17" (1/3) ... [2023-04-01 12:35:22,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b16d0df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:35:22, skipping insertion in model container [2023-04-01 12:35:22,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:35:19" (2/3) ... [2023-04-01 12:35:22,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b16d0df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:35:22, skipping insertion in model container [2023-04-01 12:35:22,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:35:22" (3/3) ... [2023-04-01 12:35:22,826 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c [2023-04-01 12:35:22,842 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 12:35:22,842 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-04-01 12:35:22,897 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 12:35:22,903 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;@7bf95405, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 12:35:22,904 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-04-01 12:35:22,912 INFO L276 IsEmpty]: Start isEmpty. Operand has 883 states, 787 states have (on average 1.664548919949174) internal successors, (1310), 878 states have internal predecessors, (1310), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 12:35:22,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-04-01 12:35:22,932 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:35:22,933 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:35:22,938 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:35:22,942 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:35:22,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1860052560, now seen corresponding path program 1 times [2023-04-01 12:35:22,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:35:22,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369076797] [2023-04-01 12:35:22,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:35:22,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:35:23,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:35:23,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:35:23,862 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:35:23,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369076797] [2023-04-01 12:35:23,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369076797] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:35:23,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:35:23,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 12:35:23,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586124245] [2023-04-01 12:35:23,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:35:23,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 12:35:23,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:35:23,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 12:35:23,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 12:35:23,907 INFO L87 Difference]: Start difference. First operand has 883 states, 787 states have (on average 1.664548919949174) internal successors, (1310), 878 states have internal predecessors, (1310), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:35:24,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:35:24,352 INFO L93 Difference]: Finished difference Result 1563 states and 2351 transitions. [2023-04-01 12:35:24,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:35:24,355 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 111 [2023-04-01 12:35:24,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:35:24,367 INFO L225 Difference]: With dead ends: 1563 [2023-04-01 12:35:24,367 INFO L226 Difference]: Without dead ends: 790 [2023-04-01 12:35:24,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:35:24,376 INFO L413 NwaCegarLoop]: 1247 mSDtfsCounter, 150 mSDsluCounter, 2294 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 3541 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 12:35:24,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 3541 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 12:35:24,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2023-04-01 12:35:24,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 790. [2023-04-01 12:35:24,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 790 states, 785 states have (on average 1.5312101910828027) internal successors, (1202), 786 states have internal predecessors, (1202), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:35:24,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 790 states to 790 states and 1205 transitions. [2023-04-01 12:35:24,454 INFO L78 Accepts]: Start accepts. Automaton has 790 states and 1205 transitions. Word has length 111 [2023-04-01 12:35:24,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:35:24,455 INFO L495 AbstractCegarLoop]: Abstraction has 790 states and 1205 transitions. [2023-04-01 12:35:24,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:35:24,455 INFO L276 IsEmpty]: Start isEmpty. Operand 790 states and 1205 transitions. [2023-04-01 12:35:24,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-04-01 12:35:24,465 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:35:24,466 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:35:24,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 12:35:24,466 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:35:24,467 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:35:24,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1418836256, now seen corresponding path program 1 times [2023-04-01 12:35:24,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:35:24,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318201384] [2023-04-01 12:35:24,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:35:24,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:35:24,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:35:24,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:35:24,823 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:35:24,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318201384] [2023-04-01 12:35:24,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318201384] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:35:24,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:35:24,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:35:24,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28214108] [2023-04-01 12:35:24,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:35:24,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:35:24,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:35:24,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:35:24,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:35:24,832 INFO L87 Difference]: Start difference. First operand 790 states and 1205 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:35:25,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:35:25,093 INFO L93 Difference]: Finished difference Result 1821 states and 2801 transitions. [2023-04-01 12:35:25,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:35:25,094 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 152 [2023-04-01 12:35:25,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:35:25,099 INFO L225 Difference]: With dead ends: 1821 [2023-04-01 12:35:25,099 INFO L226 Difference]: Without dead ends: 1219 [2023-04-01 12:35:25,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:35:25,102 INFO L413 NwaCegarLoop]: 1146 mSDtfsCounter, 842 mSDsluCounter, 946 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 842 SdHoareTripleChecker+Valid, 2092 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:35:25,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [842 Valid, 2092 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 12:35:25,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2023-04-01 12:35:25,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 1215. [2023-04-01 12:35:25,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1215 states, 1210 states have (on average 1.5338842975206612) internal successors, (1856), 1211 states have internal predecessors, (1856), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:35:25,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1215 states to 1215 states and 1859 transitions. [2023-04-01 12:35:25,156 INFO L78 Accepts]: Start accepts. Automaton has 1215 states and 1859 transitions. Word has length 152 [2023-04-01 12:35:25,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:35:25,156 INFO L495 AbstractCegarLoop]: Abstraction has 1215 states and 1859 transitions. [2023-04-01 12:35:25,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:35:25,157 INFO L276 IsEmpty]: Start isEmpty. Operand 1215 states and 1859 transitions. [2023-04-01 12:35:25,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-04-01 12:35:25,160 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:35:25,160 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:35:25,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 12:35:25,160 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:35:25,161 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:35:25,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1724996485, now seen corresponding path program 1 times [2023-04-01 12:35:25,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:35:25,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415492671] [2023-04-01 12:35:25,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:35:25,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:35:25,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:35:25,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:35:25,538 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:35:25,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415492671] [2023-04-01 12:35:25,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415492671] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:35:25,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:35:25,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:35:25,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785504434] [2023-04-01 12:35:25,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:35:25,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:35:25,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:35:25,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:35:25,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:35:25,542 INFO L87 Difference]: Start difference. First operand 1215 states and 1859 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:35:25,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:35:25,940 INFO L93 Difference]: Finished difference Result 2679 states and 4129 transitions. [2023-04-01 12:35:25,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:35:25,940 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 158 [2023-04-01 12:35:25,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:35:25,947 INFO L225 Difference]: With dead ends: 2679 [2023-04-01 12:35:25,948 INFO L226 Difference]: Without dead ends: 1651 [2023-04-01 12:35:25,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:35:25,951 INFO L413 NwaCegarLoop]: 1856 mSDtfsCounter, 922 mSDsluCounter, 901 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 922 SdHoareTripleChecker+Valid, 2757 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 12:35:25,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [922 Valid, 2757 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 12:35:25,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1651 states. [2023-04-01 12:35:26,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1651 to 1647. [2023-04-01 12:35:26,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1647 states, 1642 states have (on average 1.5261875761266748) internal successors, (2506), 1643 states have internal predecessors, (2506), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:35:26,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1647 states to 1647 states and 2509 transitions. [2023-04-01 12:35:26,013 INFO L78 Accepts]: Start accepts. Automaton has 1647 states and 2509 transitions. Word has length 158 [2023-04-01 12:35:26,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:35:26,013 INFO L495 AbstractCegarLoop]: Abstraction has 1647 states and 2509 transitions. [2023-04-01 12:35:26,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:35:26,014 INFO L276 IsEmpty]: Start isEmpty. Operand 1647 states and 2509 transitions. [2023-04-01 12:35:26,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2023-04-01 12:35:26,017 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:35:26,017 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:35:26,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 12:35:26,017 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:35:26,018 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:35:26,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1294139675, now seen corresponding path program 1 times [2023-04-01 12:35:26,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:35:26,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376142906] [2023-04-01 12:35:26,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:35:26,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:35:26,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:35:26,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:35:26,243 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:35:26,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376142906] [2023-04-01 12:35:26,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376142906] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:35:26,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:35:26,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:35:26,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033521596] [2023-04-01 12:35:26,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:35:26,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:35:26,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:35:26,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:35:26,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:35:26,246 INFO L87 Difference]: Start difference. First operand 1647 states and 2509 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:35:26,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:35:26,606 INFO L93 Difference]: Finished difference Result 4169 states and 6365 transitions. [2023-04-01 12:35:26,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:35:26,607 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 161 [2023-04-01 12:35:26,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:35:26,618 INFO L225 Difference]: With dead ends: 4169 [2023-04-01 12:35:26,618 INFO L226 Difference]: Without dead ends: 2728 [2023-04-01 12:35:26,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:35:26,621 INFO L413 NwaCegarLoop]: 1140 mSDtfsCounter, 834 mSDsluCounter, 914 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 834 SdHoareTripleChecker+Valid, 2054 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:35:26,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [834 Valid, 2054 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 12:35:26,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2728 states. [2023-04-01 12:35:26,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2728 to 2724. [2023-04-01 12:35:26,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2724 states, 2719 states have (on average 1.5200441338727473) internal successors, (4133), 2720 states have internal predecessors, (4133), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:35:26,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2724 states to 2724 states and 4136 transitions. [2023-04-01 12:35:26,771 INFO L78 Accepts]: Start accepts. Automaton has 2724 states and 4136 transitions. Word has length 161 [2023-04-01 12:35:26,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:35:26,772 INFO L495 AbstractCegarLoop]: Abstraction has 2724 states and 4136 transitions. [2023-04-01 12:35:26,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:35:26,772 INFO L276 IsEmpty]: Start isEmpty. Operand 2724 states and 4136 transitions. [2023-04-01 12:35:26,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-04-01 12:35:26,777 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:35:26,777 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:35:26,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 12:35:26,778 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:35:26,778 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:35:26,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1173445088, now seen corresponding path program 1 times [2023-04-01 12:35:26,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:35:26,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869281481] [2023-04-01 12:35:26,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:35:26,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:35:26,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:35:27,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:35:27,019 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:35:27,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869281481] [2023-04-01 12:35:27,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869281481] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:35:27,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:35:27,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:35:27,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022688525] [2023-04-01 12:35:27,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:35:27,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:35:27,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:35:27,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:35:27,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:35:27,022 INFO L87 Difference]: Start difference. First operand 2724 states and 4136 transitions. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:35:27,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:35:27,442 INFO L93 Difference]: Finished difference Result 6437 states and 9810 transitions. [2023-04-01 12:35:27,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:35:27,443 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 167 [2023-04-01 12:35:27,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:35:27,458 INFO L225 Difference]: With dead ends: 6437 [2023-04-01 12:35:27,458 INFO L226 Difference]: Without dead ends: 3918 [2023-04-01 12:35:27,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:35:27,468 INFO L413 NwaCegarLoop]: 1878 mSDtfsCounter, 937 mSDsluCounter, 916 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 937 SdHoareTripleChecker+Valid, 2794 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:35:27,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [937 Valid, 2794 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 12:35:27,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3918 states. [2023-04-01 12:35:27,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3918 to 3914. [2023-04-01 12:35:27,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3914 states, 3909 states have (on average 1.5213609618828345) internal successors, (5947), 3910 states have internal predecessors, (5947), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:35:27,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3914 states to 3914 states and 5950 transitions. [2023-04-01 12:35:27,680 INFO L78 Accepts]: Start accepts. Automaton has 3914 states and 5950 transitions. Word has length 167 [2023-04-01 12:35:27,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:35:27,680 INFO L495 AbstractCegarLoop]: Abstraction has 3914 states and 5950 transitions. [2023-04-01 12:35:27,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:35:27,681 INFO L276 IsEmpty]: Start isEmpty. Operand 3914 states and 5950 transitions. [2023-04-01 12:35:27,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-04-01 12:35:27,687 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:35:27,687 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:35:27,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 12:35:27,687 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:35:27,688 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:35:27,688 INFO L85 PathProgramCache]: Analyzing trace with hash 166255440, now seen corresponding path program 1 times [2023-04-01 12:35:27,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:35:27,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252058120] [2023-04-01 12:35:27,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:35:27,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:35:27,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:35:27,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:35:27,902 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:35:27,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252058120] [2023-04-01 12:35:27,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252058120] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:35:27,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:35:27,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:35:27,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343614360] [2023-04-01 12:35:27,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:35:27,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:35:27,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:35:27,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:35:27,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:35:27,904 INFO L87 Difference]: Start difference. First operand 3914 states and 5950 transitions. Second operand has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:35:28,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:35:28,507 INFO L93 Difference]: Finished difference Result 10370 states and 15739 transitions. [2023-04-01 12:35:28,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:35:28,508 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 170 [2023-04-01 12:35:28,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:35:28,536 INFO L225 Difference]: With dead ends: 10370 [2023-04-01 12:35:28,536 INFO L226 Difference]: Without dead ends: 6680 [2023-04-01 12:35:28,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:35:28,548 INFO L413 NwaCegarLoop]: 1138 mSDtfsCounter, 826 mSDsluCounter, 886 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 826 SdHoareTripleChecker+Valid, 2024 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:35:28,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [826 Valid, 2024 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 12:35:28,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6680 states. [2023-04-01 12:35:29,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6680 to 6676. [2023-04-01 12:35:29,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6676 states, 6671 states have (on average 1.5084694948283615) internal successors, (10063), 6672 states have internal predecessors, (10063), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:35:29,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6676 states to 6676 states and 10066 transitions. [2023-04-01 12:35:29,090 INFO L78 Accepts]: Start accepts. Automaton has 6676 states and 10066 transitions. Word has length 170 [2023-04-01 12:35:29,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:35:29,091 INFO L495 AbstractCegarLoop]: Abstraction has 6676 states and 10066 transitions. [2023-04-01 12:35:29,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:35:29,091 INFO L276 IsEmpty]: Start isEmpty. Operand 6676 states and 10066 transitions. [2023-04-01 12:35:29,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2023-04-01 12:35:29,101 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:35:29,101 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:35:29,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 12:35:29,102 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:35:29,102 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:35:29,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1954852152, now seen corresponding path program 1 times [2023-04-01 12:35:29,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:35:29,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281577480] [2023-04-01 12:35:29,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:35:29,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:35:29,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:35:29,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:35:29,312 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:35:29,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281577480] [2023-04-01 12:35:29,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281577480] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:35:29,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:35:29,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:35:29,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146011621] [2023-04-01 12:35:29,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:35:29,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:35:29,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:35:29,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:35:29,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:35:29,315 INFO L87 Difference]: Start difference. First operand 6676 states and 10066 transitions. Second operand has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:35:30,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:35:30,010 INFO L93 Difference]: Finished difference Result 16337 states and 24698 transitions. [2023-04-01 12:35:30,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:35:30,011 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 176 [2023-04-01 12:35:30,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:35:30,064 INFO L225 Difference]: With dead ends: 16337 [2023-04-01 12:35:30,064 INFO L226 Difference]: Without dead ends: 9884 [2023-04-01 12:35:30,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:35:30,088 INFO L413 NwaCegarLoop]: 1848 mSDtfsCounter, 928 mSDsluCounter, 889 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 928 SdHoareTripleChecker+Valid, 2737 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:35:30,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [928 Valid, 2737 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 12:35:30,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9884 states. [2023-04-01 12:35:30,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9884 to 9880. [2023-04-01 12:35:30,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9880 states, 9875 states have (on average 1.508860759493671) internal successors, (14900), 9876 states have internal predecessors, (14900), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:35:30,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9880 states to 9880 states and 14903 transitions. [2023-04-01 12:35:30,706 INFO L78 Accepts]: Start accepts. Automaton has 9880 states and 14903 transitions. Word has length 176 [2023-04-01 12:35:30,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:35:30,707 INFO L495 AbstractCegarLoop]: Abstraction has 9880 states and 14903 transitions. [2023-04-01 12:35:30,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:35:30,708 INFO L276 IsEmpty]: Start isEmpty. Operand 9880 states and 14903 transitions. [2023-04-01 12:35:30,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2023-04-01 12:35:30,722 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:35:30,722 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:35:30,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 12:35:30,723 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:35:30,723 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:35:30,723 INFO L85 PathProgramCache]: Analyzing trace with hash 550995694, now seen corresponding path program 1 times [2023-04-01 12:35:30,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:35:30,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866800411] [2023-04-01 12:35:30,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:35:30,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:35:30,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:35:30,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:35:30,945 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:35:30,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866800411] [2023-04-01 12:35:30,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866800411] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:35:30,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:35:30,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:35:30,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910415468] [2023-04-01 12:35:30,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:35:30,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:35:30,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:35:30,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:35:30,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:35:30,952 INFO L87 Difference]: Start difference. First operand 9880 states and 14903 transitions. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:35:32,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:35:32,296 INFO L93 Difference]: Finished difference Result 26576 states and 39915 transitions. [2023-04-01 12:35:32,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:35:32,297 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 179 [2023-04-01 12:35:32,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:35:32,342 INFO L225 Difference]: With dead ends: 26576 [2023-04-01 12:35:32,342 INFO L226 Difference]: Without dead ends: 16938 [2023-04-01 12:35:32,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:35:32,369 INFO L413 NwaCegarLoop]: 1136 mSDtfsCounter, 818 mSDsluCounter, 858 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 818 SdHoareTripleChecker+Valid, 1994 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:35:32,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [818 Valid, 1994 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 12:35:32,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16938 states. [2023-04-01 12:35:33,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16938 to 16934. [2023-04-01 12:35:33,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16934 states, 16929 states have (on average 1.4899285250162444) internal successors, (25223), 16930 states have internal predecessors, (25223), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:35:33,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16934 states to 16934 states and 25226 transitions. [2023-04-01 12:35:33,539 INFO L78 Accepts]: Start accepts. Automaton has 16934 states and 25226 transitions. Word has length 179 [2023-04-01 12:35:33,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:35:33,539 INFO L495 AbstractCegarLoop]: Abstraction has 16934 states and 25226 transitions. [2023-04-01 12:35:33,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:35:33,540 INFO L276 IsEmpty]: Start isEmpty. Operand 16934 states and 25226 transitions. [2023-04-01 12:35:33,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2023-04-01 12:35:33,562 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:35:33,562 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:35:33,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 12:35:33,562 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:35:33,563 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:35:33,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1908597279, now seen corresponding path program 1 times [2023-04-01 12:35:33,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:35:33,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951907247] [2023-04-01 12:35:33,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:35:33,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:35:33,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:35:33,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:35:33,756 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:35:33,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951907247] [2023-04-01 12:35:33,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951907247] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:35:33,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:35:33,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:35:33,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162748847] [2023-04-01 12:35:33,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:35:33,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:35:33,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:35:33,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:35:33,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:35:33,759 INFO L87 Difference]: Start difference. First operand 16934 states and 25226 transitions. Second operand has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:35:35,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:35:35,563 INFO L93 Difference]: Finished difference Result 42145 states and 62938 transitions. [2023-04-01 12:35:35,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:35:35,564 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 185 [2023-04-01 12:35:35,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:35:35,634 INFO L225 Difference]: With dead ends: 42145 [2023-04-01 12:35:35,634 INFO L226 Difference]: Without dead ends: 25452 [2023-04-01 12:35:35,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:35:35,677 INFO L413 NwaCegarLoop]: 1818 mSDtfsCounter, 919 mSDsluCounter, 862 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 919 SdHoareTripleChecker+Valid, 2680 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:35:35,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [919 Valid, 2680 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 12:35:35,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25452 states. [2023-04-01 12:35:37,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25452 to 25448. [2023-04-01 12:35:37,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25448 states, 25443 states have (on average 1.4901151593758597) internal successors, (37913), 25444 states have internal predecessors, (37913), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:35:37,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25448 states to 25448 states and 37916 transitions. [2023-04-01 12:35:37,254 INFO L78 Accepts]: Start accepts. Automaton has 25448 states and 37916 transitions. Word has length 185 [2023-04-01 12:35:37,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:35:37,255 INFO L495 AbstractCegarLoop]: Abstraction has 25448 states and 37916 transitions. [2023-04-01 12:35:37,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:35:37,255 INFO L276 IsEmpty]: Start isEmpty. Operand 25448 states and 37916 transitions. [2023-04-01 12:35:37,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2023-04-01 12:35:37,282 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:35:37,283 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:35:37,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 12:35:37,283 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:35:37,283 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:35:37,284 INFO L85 PathProgramCache]: Analyzing trace with hash 530135557, now seen corresponding path program 1 times [2023-04-01 12:35:37,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:35:37,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220679449] [2023-04-01 12:35:37,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:35:37,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:35:37,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:35:37,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:35:37,631 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:35:37,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220679449] [2023-04-01 12:35:37,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220679449] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:35:37,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:35:37,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 12:35:37,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917864298] [2023-04-01 12:35:37,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:35:37,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 12:35:37,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:35:37,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 12:35:37,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 12:35:37,633 INFO L87 Difference]: Start difference. First operand 25448 states and 37916 transitions. Second operand has 6 states, 6 states have (on average 30.833333333333332) internal successors, (185), 6 states have internal predecessors, (185), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:35:41,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:35:41,616 INFO L93 Difference]: Finished difference Result 64317 states and 95935 transitions. [2023-04-01 12:35:41,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 12:35:41,616 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 30.833333333333332) internal successors, (185), 6 states have internal predecessors, (185), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 188 [2023-04-01 12:35:41,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:35:41,719 INFO L225 Difference]: With dead ends: 64317 [2023-04-01 12:35:41,719 INFO L226 Difference]: Without dead ends: 38845 [2023-04-01 12:35:41,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-04-01 12:35:41,766 INFO L413 NwaCegarLoop]: 5535 mSDtfsCounter, 3617 mSDsluCounter, 11181 mSDsCounter, 0 mSdLazyCounter, 1695 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3617 SdHoareTripleChecker+Valid, 16716 SdHoareTripleChecker+Invalid, 1725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-04-01 12:35:41,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3617 Valid, 16716 Invalid, 1725 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [30 Valid, 1695 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-04-01 12:35:41,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38845 states. [2023-04-01 12:35:44,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38845 to 38602. [2023-04-01 12:35:44,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38602 states, 38597 states have (on average 1.4900899033603647) internal successors, (57513), 38598 states have internal predecessors, (57513), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:35:44,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38602 states to 38602 states and 57516 transitions. [2023-04-01 12:35:44,415 INFO L78 Accepts]: Start accepts. Automaton has 38602 states and 57516 transitions. Word has length 188 [2023-04-01 12:35:44,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:35:44,415 INFO L495 AbstractCegarLoop]: Abstraction has 38602 states and 57516 transitions. [2023-04-01 12:35:44,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.833333333333332) internal successors, (185), 6 states have internal predecessors, (185), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:35:44,415 INFO L276 IsEmpty]: Start isEmpty. Operand 38602 states and 57516 transitions. [2023-04-01 12:35:44,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2023-04-01 12:35:44,448 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:35:44,448 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:35:44,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-01 12:35:44,449 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:35:44,449 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:35:44,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1060201009, now seen corresponding path program 1 times [2023-04-01 12:35:44,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:35:44,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792840153] [2023-04-01 12:35:44,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:35:44,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:35:44,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:35:44,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:35:44,690 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:35:44,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792840153] [2023-04-01 12:35:44,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792840153] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:35:44,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:35:44,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 12:35:44,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941710744] [2023-04-01 12:35:44,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:35:44,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 12:35:44,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:35:44,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 12:35:44,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 12:35:44,694 INFO L87 Difference]: Start difference. First operand 38602 states and 57516 transitions. Second operand has 4 states, 4 states have (on average 46.5) internal successors, (186), 4 states have internal predecessors, (186), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:35:47,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:35:47,072 INFO L93 Difference]: Finished difference Result 76954 states and 114671 transitions. [2023-04-01 12:35:47,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 12:35:47,073 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 46.5) internal successors, (186), 4 states have internal predecessors, (186), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 189 [2023-04-01 12:35:47,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:35:47,157 INFO L225 Difference]: With dead ends: 76954 [2023-04-01 12:35:47,158 INFO L226 Difference]: Without dead ends: 38606 [2023-04-01 12:35:47,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:35:47,219 INFO L413 NwaCegarLoop]: 1840 mSDtfsCounter, 1793 mSDsluCounter, 1865 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1793 SdHoareTripleChecker+Valid, 3705 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 12:35:47,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1793 Valid, 3705 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 12:35:47,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38606 states. [2023-04-01 12:35:49,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38606 to 38567. [2023-04-01 12:35:49,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38567 states, 38562 states have (on average 1.485892847881334) internal successors, (57299), 38563 states have internal predecessors, (57299), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:35:49,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38567 states to 38567 states and 57302 transitions. [2023-04-01 12:35:49,836 INFO L78 Accepts]: Start accepts. Automaton has 38567 states and 57302 transitions. Word has length 189 [2023-04-01 12:35:49,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:35:49,836 INFO L495 AbstractCegarLoop]: Abstraction has 38567 states and 57302 transitions. [2023-04-01 12:35:49,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.5) internal successors, (186), 4 states have internal predecessors, (186), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:35:49,837 INFO L276 IsEmpty]: Start isEmpty. Operand 38567 states and 57302 transitions. [2023-04-01 12:35:49,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2023-04-01 12:35:49,877 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:35:49,877 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:35:49,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-01 12:35:49,877 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:35:49,878 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:35:49,878 INFO L85 PathProgramCache]: Analyzing trace with hash -515043212, now seen corresponding path program 1 times [2023-04-01 12:35:49,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:35:49,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43003276] [2023-04-01 12:35:49,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:35:49,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:35:50,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:35:50,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:35:50,702 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:35:50,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43003276] [2023-04-01 12:35:50,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43003276] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:35:50,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:35:50,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 12:35:50,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679189526] [2023-04-01 12:35:50,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:35:50,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 12:35:50,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:35:50,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 12:35:50,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 12:35:50,704 INFO L87 Difference]: Start difference. First operand 38567 states and 57302 transitions. Second operand has 4 states, 4 states have (on average 48.75) internal successors, (195), 4 states have internal predecessors, (195), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:35:54,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:35:54,746 INFO L93 Difference]: Finished difference Result 76431 states and 114008 transitions. [2023-04-01 12:35:54,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 12:35:54,747 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 48.75) internal successors, (195), 4 states have internal predecessors, (195), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 198 [2023-04-01 12:35:54,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:35:54,861 INFO L225 Difference]: With dead ends: 76431 [2023-04-01 12:35:54,861 INFO L226 Difference]: Without dead ends: 53826 [2023-04-01 12:35:54,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 12:35:54,914 INFO L413 NwaCegarLoop]: 2289 mSDtfsCounter, 1729 mSDsluCounter, 1366 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1729 SdHoareTripleChecker+Valid, 3655 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 12:35:54,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1729 Valid, 3655 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 12:35:54,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53826 states. [2023-04-01 12:35:58,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53826 to 53658. [2023-04-01 12:35:58,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53658 states, 53653 states have (on average 1.4779788641828042) internal successors, (79298), 53654 states have internal predecessors, (79298), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:35:58,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53658 states to 53658 states and 79301 transitions. [2023-04-01 12:35:58,938 INFO L78 Accepts]: Start accepts. Automaton has 53658 states and 79301 transitions. Word has length 198 [2023-04-01 12:35:58,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:35:58,938 INFO L495 AbstractCegarLoop]: Abstraction has 53658 states and 79301 transitions. [2023-04-01 12:35:58,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.75) internal successors, (195), 4 states have internal predecessors, (195), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:35:58,938 INFO L276 IsEmpty]: Start isEmpty. Operand 53658 states and 79301 transitions. [2023-04-01 12:35:58,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2023-04-01 12:35:58,973 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:35:58,973 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:35:58,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-01 12:35:58,974 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:35:58,974 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:35:58,974 INFO L85 PathProgramCache]: Analyzing trace with hash 345976360, now seen corresponding path program 1 times [2023-04-01 12:35:58,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:35:58,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691605891] [2023-04-01 12:35:58,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:35:58,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:35:59,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:35:59,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:35:59,751 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:35:59,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691605891] [2023-04-01 12:35:59,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691605891] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:35:59,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:35:59,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 12:35:59,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955178078] [2023-04-01 12:35:59,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:35:59,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 12:35:59,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:35:59,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 12:35:59,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 12:35:59,754 INFO L87 Difference]: Start difference. First operand 53658 states and 79301 transitions. Second operand has 4 states, 4 states have (on average 49.5) internal successors, (198), 4 states have internal predecessors, (198), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:36:04,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:36:04,391 INFO L93 Difference]: Finished difference Result 108703 states and 160668 transitions. [2023-04-01 12:36:04,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 12:36:04,391 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 49.5) internal successors, (198), 4 states have internal predecessors, (198), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 201 [2023-04-01 12:36:04,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:36:04,534 INFO L225 Difference]: With dead ends: 108703 [2023-04-01 12:36:04,534 INFO L226 Difference]: Without dead ends: 78170 [2023-04-01 12:36:04,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 12:36:04,583 INFO L413 NwaCegarLoop]: 2320 mSDtfsCounter, 1618 mSDsluCounter, 2032 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1618 SdHoareTripleChecker+Valid, 4352 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:36:04,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1618 Valid, 4352 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 12:36:04,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78170 states. [2023-04-01 12:36:09,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78170 to 78162.