/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 02:43:55,859 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 02:43:55,861 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 02:43:55,886 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 02:43:55,886 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 02:43:55,887 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 02:43:55,888 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 02:43:55,889 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 02:43:55,890 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 02:43:55,891 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 02:43:55,892 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 02:43:55,893 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 02:43:55,893 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 02:43:55,894 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 02:43:55,895 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 02:43:55,895 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 02:43:55,896 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 02:43:55,897 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 02:43:55,898 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 02:43:55,900 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 02:43:55,901 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 02:43:55,902 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 02:43:55,903 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 02:43:55,904 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 02:43:55,907 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 02:43:55,907 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 02:43:55,907 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 02:43:55,908 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 02:43:55,909 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 02:43:55,909 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 02:43:55,910 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 02:43:55,910 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 02:43:55,911 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 02:43:55,911 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 02:43:55,912 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 02:43:55,912 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 02:43:55,913 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 02:43:55,913 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 02:43:55,913 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 02:43:55,914 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 02:43:55,914 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 02:43:55,915 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-03 02:43:55,935 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 02:43:55,935 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 02:43:55,935 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 02:43:55,935 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 02:43:55,936 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 02:43:55,936 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 02:43:55,936 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 02:43:55,937 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 02:43:55,937 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 02:43:55,937 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 02:43:55,937 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 02:43:55,937 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 02:43:55,937 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 02:43:55,937 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 02:43:55,937 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 02:43:55,938 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 02:43:55,938 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 02:43:55,938 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 02:43:55,938 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 02:43:55,939 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 02:43:55,939 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 02:43:55,939 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 02:43:55,939 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 02:43:55,939 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 02:43:55,939 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 02:43:55,939 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 02:43:55,939 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 02:43:55,940 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 02:43:55,940 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 02:43:55,940 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 02:43:55,940 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 02:43:55,940 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 02:43:55,940 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:43:55,940 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 02:43:55,940 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 02:43:55,941 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 02:43:55,941 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 02:43:55,941 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 02:43:55,941 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 02:43:55,941 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 02:43:55,941 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 02:43:55,941 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 02:43:56,126 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 02:43:56,146 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 02:43:56,149 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 02:43:56,149 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 02:43:56,150 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 02:43:56,151 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-03 02:43:57,189 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 02:43:57,442 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 02:43:57,442 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-03 02:43:57,450 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a68cca002/75c21117ec274ef0b67f68bf13935d32/FLAG4f49a2cd4 [2023-04-03 02:43:57,463 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a68cca002/75c21117ec274ef0b67f68bf13935d32 [2023-04-03 02:43:57,465 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 02:43:57,466 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 02:43:57,467 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 02:43:57,467 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 02:43:57,474 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 02:43:57,475 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:43:57" (1/1) ... [2023-04-03 02:43:57,476 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a16410 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:43:57, skipping insertion in model container [2023-04-03 02:43:57,476 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:43:57" (1/1) ... [2023-04-03 02:43:57,482 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 02:43:57,517 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 02:43:57,733 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_lcr-var-start-time.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[5375,5388] [2023-04-03 02:43:57,773 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:43:57,787 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 02:43:57,830 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_lcr-var-start-time.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[5375,5388] [2023-04-03 02:43:57,857 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:43:57,879 INFO L208 MainTranslator]: Completed translation [2023-04-03 02:43:57,879 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:43:57 WrapperNode [2023-04-03 02:43:57,879 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 02:43:57,881 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 02:43:57,881 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 02:43:57,881 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 02:43:57,891 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:43:57" (1/1) ... [2023-04-03 02:43:57,893 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:43:57" (1/1) ... [2023-04-03 02:43:57,916 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:43:57" (1/1) ... [2023-04-03 02:43:57,916 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:43:57" (1/1) ... [2023-04-03 02:43:57,927 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:43:57" (1/1) ... [2023-04-03 02:43:57,949 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:43:57" (1/1) ... [2023-04-03 02:43:57,969 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:43:57" (1/1) ... [2023-04-03 02:43:57,971 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:43:57" (1/1) ... [2023-04-03 02:43:57,974 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 02:43:57,976 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 02:43:57,976 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 02:43:57,985 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 02:43:57,986 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:43:57" (1/1) ... [2023-04-03 02:43:57,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:43:58,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:43:58,014 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-03 02:43:58,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-03 02:43:58,061 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 02:43:58,061 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 02:43:58,061 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 02:43:58,061 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 02:43:58,062 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 02:43:58,062 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 02:43:58,062 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 02:43:58,062 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 02:43:58,062 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 02:43:58,063 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 02:43:58,063 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 02:43:58,063 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-03 02:43:58,063 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 02:43:58,063 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 02:43:58,063 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 02:43:58,063 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 02:43:58,063 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 02:43:58,064 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 02:43:58,064 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 02:43:58,064 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-03 02:43:58,064 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 02:43:58,064 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 02:43:58,064 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 02:43:58,064 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 02:43:58,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 02:43:58,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 02:43:58,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 02:43:58,066 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 02:43:58,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 02:43:58,220 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 02:43:58,222 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 02:43:58,628 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 02:43:58,749 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 02:43:58,752 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-03 02:43:58,754 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:43:58 BoogieIcfgContainer [2023-04-03 02:43:58,755 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 02:43:58,757 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 02:43:58,757 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 02:43:58,760 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 02:43:58,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 02:43:57" (1/3) ... [2023-04-03 02:43:58,761 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bca412d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:43:58, skipping insertion in model container [2023-04-03 02:43:58,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:43:57" (2/3) ... [2023-04-03 02:43:58,761 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bca412d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:43:58, skipping insertion in model container [2023-04-03 02:43:58,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:43:58" (3/3) ... [2023-04-03 02:43:58,762 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-03 02:43:58,779 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 02:43:58,780 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 02:43:58,824 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 02:43:58,830 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;@277fba1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 02:43:58,831 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 02:43:58,835 INFO L276 IsEmpty]: Start isEmpty. Operand has 90 states, 84 states have (on average 1.6547619047619047) internal successors, (139), 85 states have internal predecessors, (139), 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) [2023-04-03 02:43:58,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-03 02:43:58,844 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:43:58,844 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:43:58,845 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:43:58,849 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:43:58,849 INFO L85 PathProgramCache]: Analyzing trace with hash -472051513, now seen corresponding path program 1 times [2023-04-03 02:43:58,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:43:58,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521500329] [2023-04-03 02:43:58,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:43:58,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:43:59,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:43:59,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:43:59,236 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:43:59,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521500329] [2023-04-03 02:43:59,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521500329] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:43:59,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:43:59,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:43:59,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126606178] [2023-04-03 02:43:59,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:43:59,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:43:59,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:43:59,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:43:59,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:43:59,269 INFO L87 Difference]: Start difference. First operand has 90 states, 84 states have (on average 1.6547619047619047) internal successors, (139), 85 states have internal predecessors, (139), 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 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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) [2023-04-03 02:43:59,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:43:59,344 INFO L93 Difference]: Finished difference Result 199 states and 302 transitions. [2023-04-03 02:43:59,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:43:59,346 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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 41 [2023-04-03 02:43:59,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:43:59,354 INFO L225 Difference]: With dead ends: 199 [2023-04-03 02:43:59,354 INFO L226 Difference]: Without dead ends: 131 [2023-04-03 02:43:59,357 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 [2023-04-03 02:43:59,360 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 105 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:43:59,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 273 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:43:59,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-04-03 02:43:59,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2023-04-03 02:43:59,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 125 states have (on average 1.408) internal successors, (176), 125 states have internal predecessors, (176), 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) [2023-04-03 02:43:59,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 179 transitions. [2023-04-03 02:43:59,406 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 179 transitions. Word has length 41 [2023-04-03 02:43:59,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:43:59,407 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 179 transitions. [2023-04-03 02:43:59,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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) [2023-04-03 02:43:59,407 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 179 transitions. [2023-04-03 02:43:59,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-04-03 02:43:59,408 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:43:59,408 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] [2023-04-03 02:43:59,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 02:43:59,409 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:43:59,409 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:43:59,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1678701204, now seen corresponding path program 1 times [2023-04-03 02:43:59,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:43:59,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914627689] [2023-04-03 02:43:59,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:43:59,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:43:59,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:43:59,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:43:59,549 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:43:59,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914627689] [2023-04-03 02:43:59,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914627689] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:43:59,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:43:59,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:43:59,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205165661] [2023-04-03 02:43:59,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:43:59,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:43:59,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:43:59,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:43:59,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:43:59,553 INFO L87 Difference]: Start difference. First operand 129 states and 179 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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) [2023-04-03 02:43:59,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:43:59,670 INFO L93 Difference]: Finished difference Result 305 states and 443 transitions. [2023-04-03 02:43:59,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:43:59,685 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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 44 [2023-04-03 02:43:59,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:43:59,687 INFO L225 Difference]: With dead ends: 305 [2023-04-03 02:43:59,687 INFO L226 Difference]: Without dead ends: 206 [2023-04-03 02:43:59,688 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 [2023-04-03 02:43:59,689 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 78 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:43:59,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 219 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:43:59,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2023-04-03 02:43:59,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 204. [2023-04-03 02:43:59,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 200 states have (on average 1.44) internal successors, (288), 200 states have internal predecessors, (288), 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) [2023-04-03 02:43:59,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 291 transitions. [2023-04-03 02:43:59,742 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 291 transitions. Word has length 44 [2023-04-03 02:43:59,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:43:59,742 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 291 transitions. [2023-04-03 02:43:59,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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) [2023-04-03 02:43:59,743 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 291 transitions. [2023-04-03 02:43:59,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-03 02:43:59,744 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:43:59,744 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] [2023-04-03 02:43:59,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 02:43:59,744 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:43:59,746 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:43:59,746 INFO L85 PathProgramCache]: Analyzing trace with hash -416097592, now seen corresponding path program 1 times [2023-04-03 02:43:59,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:43:59,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2252648] [2023-04-03 02:43:59,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:43:59,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:43:59,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:43:59,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:43:59,867 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:43:59,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2252648] [2023-04-03 02:43:59,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2252648] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:43:59,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:43:59,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:43:59,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423835878] [2023-04-03 02:43:59,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:43:59,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:43:59,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:43:59,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:43:59,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:43:59,871 INFO L87 Difference]: Start difference. First operand 204 states and 291 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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) [2023-04-03 02:43:59,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:43:59,945 INFO L93 Difference]: Finished difference Result 508 states and 745 transitions. [2023-04-03 02:43:59,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:43:59,945 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 47 [2023-04-03 02:43:59,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:43:59,949 INFO L225 Difference]: With dead ends: 508 [2023-04-03 02:43:59,949 INFO L226 Difference]: Without dead ends: 334 [2023-04-03 02:43:59,956 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 [2023-04-03 02:43:59,959 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 73 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:43:59,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 204 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:43:59,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2023-04-03 02:44:00,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 332. [2023-04-03 02:44:00,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 328 states have (on average 1.451219512195122) internal successors, (476), 328 states have internal predecessors, (476), 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) [2023-04-03 02:44:00,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 479 transitions. [2023-04-03 02:44:00,046 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 479 transitions. Word has length 47 [2023-04-03 02:44:00,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:44:00,046 INFO L495 AbstractCegarLoop]: Abstraction has 332 states and 479 transitions. [2023-04-03 02:44:00,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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) [2023-04-03 02:44:00,046 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 479 transitions. [2023-04-03 02:44:00,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-04-03 02:44:00,050 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:44:00,050 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:44:00,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 02:44:00,051 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:44:00,052 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:44:00,053 INFO L85 PathProgramCache]: Analyzing trace with hash 2036743711, now seen corresponding path program 1 times [2023-04-03 02:44:00,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:44:00,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880237793] [2023-04-03 02:44:00,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:44:00,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:44:00,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:44:00,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:44:00,150 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:44:00,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880237793] [2023-04-03 02:44:00,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880237793] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:44:00,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:44:00,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:44:00,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100901970] [2023-04-03 02:44:00,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:44:00,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:44:00,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:44:00,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:44:00,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:44:00,153 INFO L87 Difference]: Start difference. First operand 332 states and 479 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2023-04-03 02:44:00,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:44:00,277 INFO L93 Difference]: Finished difference Result 848 states and 1241 transitions. [2023-04-03 02:44:00,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:44:00,277 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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 50 [2023-04-03 02:44:00,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:44:00,281 INFO L225 Difference]: With dead ends: 848 [2023-04-03 02:44:00,282 INFO L226 Difference]: Without dead ends: 546 [2023-04-03 02:44:00,286 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 [2023-04-03 02:44:00,295 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 68 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:44:00,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 189 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:44:00,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2023-04-03 02:44:00,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 544. [2023-04-03 02:44:00,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 540 states have (on average 1.4444444444444444) internal successors, (780), 540 states have internal predecessors, (780), 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) [2023-04-03 02:44:00,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 783 transitions. [2023-04-03 02:44:00,371 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 783 transitions. Word has length 50 [2023-04-03 02:44:00,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:44:00,371 INFO L495 AbstractCegarLoop]: Abstraction has 544 states and 783 transitions. [2023-04-03 02:44:00,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2023-04-03 02:44:00,372 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 783 transitions. [2023-04-03 02:44:00,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-03 02:44:00,375 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:44:00,376 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] [2023-04-03 02:44:00,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 02:44:00,376 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:44:00,376 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:44:00,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1310305150, now seen corresponding path program 1 times [2023-04-03 02:44:00,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:44:00,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277202819] [2023-04-03 02:44:00,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:44:00,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:44:00,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:44:00,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:44:00,553 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:44:00,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277202819] [2023-04-03 02:44:00,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277202819] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:44:00,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:44:00,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-03 02:44:00,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944789358] [2023-04-03 02:44:00,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:44:00,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-03 02:44:00,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:44:00,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-03 02:44:00,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-04-03 02:44:00,558 INFO L87 Difference]: Start difference. First operand 544 states and 783 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 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) [2023-04-03 02:44:01,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:44:01,066 INFO L93 Difference]: Finished difference Result 2248 states and 3251 transitions. [2023-04-03 02:44:01,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-03 02:44:01,067 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 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 53 [2023-04-03 02:44:01,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:44:01,074 INFO L225 Difference]: With dead ends: 2248 [2023-04-03 02:44:01,075 INFO L226 Difference]: Without dead ends: 1734 [2023-04-03 02:44:01,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-04-03 02:44:01,078 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 283 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:44:01,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 405 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:44:01,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2023-04-03 02:44:01,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1728. [2023-04-03 02:44:01,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1728 states, 1724 states have (on average 1.4408352668213458) internal successors, (2484), 1724 states have internal predecessors, (2484), 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) [2023-04-03 02:44:01,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1728 states to 1728 states and 2487 transitions. [2023-04-03 02:44:01,418 INFO L78 Accepts]: Start accepts. Automaton has 1728 states and 2487 transitions. Word has length 53 [2023-04-03 02:44:01,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:44:01,419 INFO L495 AbstractCegarLoop]: Abstraction has 1728 states and 2487 transitions. [2023-04-03 02:44:01,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 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) [2023-04-03 02:44:01,420 INFO L276 IsEmpty]: Start isEmpty. Operand 1728 states and 2487 transitions. [2023-04-03 02:44:01,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-03 02:44:01,421 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:44:01,422 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] [2023-04-03 02:44:01,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 02:44:01,422 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:44:01,422 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:44:01,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1467113173, now seen corresponding path program 1 times [2023-04-03 02:44:01,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:44:01,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282615782] [2023-04-03 02:44:01,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:44:01,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:44:01,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:44:01,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:44:01,551 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:44:01,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282615782] [2023-04-03 02:44:01,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282615782] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:44:01,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:44:01,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:44:01,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093574336] [2023-04-03 02:44:01,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:44:01,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:44:01,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:44:01,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:44:01,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:44:01,553 INFO L87 Difference]: Start difference. First operand 1728 states and 2487 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 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) [2023-04-03 02:44:02,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:44:02,280 INFO L93 Difference]: Finished difference Result 4434 states and 6431 transitions. [2023-04-03 02:44:02,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:44:02,281 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 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) Word has length 55 [2023-04-03 02:44:02,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:44:02,292 INFO L225 Difference]: With dead ends: 4434 [2023-04-03 02:44:02,293 INFO L226 Difference]: Without dead ends: 2736 [2023-04-03 02:44:02,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:44:02,298 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 448 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:44:02,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [448 Valid, 115 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:44:02,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2736 states. [2023-04-03 02:44:02,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2736 to 2734. [2023-04-03 02:44:02,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2734 states, 2730 states have (on average 1.4336996336996337) internal successors, (3914), 2730 states have internal predecessors, (3914), 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) [2023-04-03 02:44:02,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2734 states to 2734 states and 3917 transitions. [2023-04-03 02:44:02,904 INFO L78 Accepts]: Start accepts. Automaton has 2734 states and 3917 transitions. Word has length 55 [2023-04-03 02:44:02,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:44:02,904 INFO L495 AbstractCegarLoop]: Abstraction has 2734 states and 3917 transitions. [2023-04-03 02:44:02,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 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) [2023-04-03 02:44:02,904 INFO L276 IsEmpty]: Start isEmpty. Operand 2734 states and 3917 transitions. [2023-04-03 02:44:02,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-03 02:44:02,905 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:44:02,905 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] [2023-04-03 02:44:02,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-03 02:44:02,905 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:44:02,906 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:44:02,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1861974800, now seen corresponding path program 1 times [2023-04-03 02:44:02,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:44:02,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746311457] [2023-04-03 02:44:02,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:44:02,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:44:02,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:44:03,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:44:03,264 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:44:03,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746311457] [2023-04-03 02:44:03,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746311457] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:44:03,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:44:03,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-03 02:44:03,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462539891] [2023-04-03 02:44:03,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:44:03,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-03 02:44:03,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:44:03,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-03 02:44:03,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-04-03 02:44:03,266 INFO L87 Difference]: Start difference. First operand 2734 states and 3917 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 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) [2023-04-03 02:44:04,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:44:04,505 INFO L93 Difference]: Finished difference Result 5166 states and 7423 transitions. [2023-04-03 02:44:04,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-03 02:44:04,506 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 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 55 [2023-04-03 02:44:04,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:44:04,528 INFO L225 Difference]: With dead ends: 5166 [2023-04-03 02:44:04,528 INFO L226 Difference]: Without dead ends: 5164 [2023-04-03 02:44:04,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2023-04-03 02:44:04,534 INFO L413 NwaCegarLoop]: 300 mSDtfsCounter, 711 mSDsluCounter, 1151 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 711 SdHoareTripleChecker+Valid, 1451 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:44:04,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [711 Valid, 1451 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:44:04,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5164 states. [2023-04-03 02:44:05,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5164 to 2981. [2023-04-03 02:44:05,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2981 states, 2977 states have (on average 1.4339939536446087) internal successors, (4269), 2977 states have internal predecessors, (4269), 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) [2023-04-03 02:44:05,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2981 states to 2981 states and 4272 transitions. [2023-04-03 02:44:05,149 INFO L78 Accepts]: Start accepts. Automaton has 2981 states and 4272 transitions. Word has length 55 [2023-04-03 02:44:05,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:44:05,150 INFO L495 AbstractCegarLoop]: Abstraction has 2981 states and 4272 transitions. [2023-04-03 02:44:05,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 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) [2023-04-03 02:44:05,150 INFO L276 IsEmpty]: Start isEmpty. Operand 2981 states and 4272 transitions. [2023-04-03 02:44:05,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-04-03 02:44:05,152 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:44:05,152 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:44:05,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-03 02:44:05,152 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:44:05,153 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:44:05,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1265444710, now seen corresponding path program 1 times [2023-04-03 02:44:05,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:44:05,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674159729] [2023-04-03 02:44:05,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:44:05,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:44:05,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:44:06,428 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:44:06,428 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:44:06,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674159729] [2023-04-03 02:44:06,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674159729] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:44:06,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526057042] [2023-04-03 02:44:06,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:44:06,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:44:06,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:44:06,441 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 02:44:06,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-03 02:44:06,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:44:06,614 INFO L262 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 60 conjunts are in the unsatisfiable core [2023-04-03 02:44:06,624 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:44:08,472 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:44:08,472 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 02:44:16,064 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:44:16,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526057042] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-03 02:44:16,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2049639251] [2023-04-03 02:44:16,084 INFO L159 IcfgInterpreter]: Started Sifa with 56 locations of interest [2023-04-03 02:44:16,084 INFO L166 IcfgInterpreter]: Building call graph [2023-04-03 02:44:16,087 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-03 02:44:16,092 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-03 02:44:16,092 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-03 02:44:16,856 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 146 for LOIs [2023-04-03 02:44:18,781 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2023-04-03 02:44:53,859 WARN L223 SmtUtils]: Spent 34.42s on a formula simplification. DAG size of input: 8097 DAG size of output: 370 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-04-03 02:45:01,274 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-03 02:45:01,370 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-03 02:45:01,548 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2023-04-03 02:45:03,432 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 124 for LOIs [2023-04-03 02:45:03,486 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-03 02:45:21,313 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '36268#(and (= ~nomsg~0 ~p1_new~0) (= ~nomsg~0 ~p4_new~0) (= ~nomsg~0 ~p4_old~0) (= ~p3_new~0 ~nomsg~0) (= ~nomsg~0 ~p2_old~0) (or (and (not (= (+ ~st4~0 ~st3~0 ~st2~0 ~st1~0) 1)) (<= 4 (mod ~r1~0 256))) (< 1 (+ ~st4~0 ~st3~0 ~st2~0 ~st1~0))) (= ~__return_19215~0 main_~main__c1~0) (<= 0 (+ ~mode4~0 ~mode3~0)) (= main_~main__c1~0 0) (= ~p3_old~0 ~p2_old~0) (= main_~__tmp_1~0 0) (= ~nomsg~0 ~p2_new~0) (<= ~mode1~0 1) (<= (+ ~mode4~0 ~mode3~0) 2) (= ~__return_19215~0 main_~check__tmp~0) (<= ~mode3~0 (+ ~mode4~0 1)) (<= ~mode4~0 (+ ~mode3~0 1)) (= main_~__tmp_1~0 main_~assert__arg~0))' at error location [2023-04-03 02:45:21,313 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-03 02:45:21,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-03 02:45:21,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 17] total 47 [2023-04-03 02:45:21,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43984238] [2023-04-03 02:45:21,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-03 02:45:21,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-04-03 02:45:21,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:45:21,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-04-03 02:45:21,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1300, Invalid=8600, Unknown=0, NotChecked=0, Total=9900 [2023-04-03 02:45:21,322 INFO L87 Difference]: Start difference. First operand 2981 states and 4272 transitions. Second operand has 47 states, 47 states have (on average 3.872340425531915) internal successors, (182), 47 states have internal predecessors, (182), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-03 02:46:55,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:46:55,377 INFO L93 Difference]: Finished difference Result 56805 states and 81456 transitions. [2023-04-03 02:46:55,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 331 states. [2023-04-03 02:46:55,378 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.872340425531915) internal successors, (182), 47 states have internal predecessors, (182), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 65 [2023-04-03 02:46:55,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:46:55,571 INFO L225 Difference]: With dead ends: 56805 [2023-04-03 02:46:55,571 INFO L226 Difference]: Without dead ends: 53882 [2023-04-03 02:46:55,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 424 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81231 ImplicationChecksByTransitivity, 85.9s TimeCoverageRelationStatistics Valid=27160, Invalid=153890, Unknown=0, NotChecked=0, Total=181050 [2023-04-03 02:46:55,631 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 14656 mSDsluCounter, 5737 mSDsCounter, 0 mSdLazyCounter, 8369 mSolverCounterSat, 743 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14656 SdHoareTripleChecker+Valid, 5984 SdHoareTripleChecker+Invalid, 9112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 743 IncrementalHoareTripleChecker+Valid, 8369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2023-04-03 02:46:55,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14656 Valid, 5984 Invalid, 9112 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [743 Valid, 8369 Invalid, 0 Unknown, 0 Unchecked, 8.5s Time] [2023-04-03 02:46:55,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53882 states. [2023-04-03 02:47:03,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53882 to 17942. [2023-04-03 02:47:03,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17942 states, 17938 states have (on average 1.3929646560374624) internal successors, (24987), 17938 states have internal predecessors, (24987), 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) [2023-04-03 02:47:03,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17942 states to 17942 states and 24990 transitions. [2023-04-03 02:47:03,157 INFO L78 Accepts]: Start accepts. Automaton has 17942 states and 24990 transitions. Word has length 65 [2023-04-03 02:47:03,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:47:03,157 INFO L495 AbstractCegarLoop]: Abstraction has 17942 states and 24990 transitions. [2023-04-03 02:47:03,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.872340425531915) internal successors, (182), 47 states have internal predecessors, (182), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-03 02:47:03,158 INFO L276 IsEmpty]: Start isEmpty. Operand 17942 states and 24990 transitions. [2023-04-03 02:47:03,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-04-03 02:47:03,161 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:47:03,161 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:47:03,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-03 02:47:03,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:47:03,373 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:47:03,373 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:47:03,374 INFO L85 PathProgramCache]: Analyzing trace with hash 666480798, now seen corresponding path program 1 times [2023-04-03 02:47:03,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:47:03,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253325239] [2023-04-03 02:47:03,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:47:03,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:47:03,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:47:04,472 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:47:04,472 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:47:04,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253325239] [2023-04-03 02:47:04,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253325239] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:47:04,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996270280] [2023-04-03 02:47:04,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:47:04,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:47:04,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:47:04,474 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 02:47:04,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-03 02:47:04,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:47:04,648 INFO L262 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 58 conjunts are in the unsatisfiable core [2023-04-03 02:47:04,652 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:47:06,069 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:47:06,069 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 02:47:12,778 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:47:12,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996270280] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-03 02:47:12,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1822604666] [2023-04-03 02:47:12,781 INFO L159 IcfgInterpreter]: Started Sifa with 56 locations of interest [2023-04-03 02:47:12,781 INFO L166 IcfgInterpreter]: Building call graph [2023-04-03 02:47:12,782 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-03 02:47:12,782 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-03 02:47:12,782 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-03 02:47:13,260 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 146 for LOIs [2023-04-03 02:47:14,614 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-03 02:47:48,616 WARN L223 SmtUtils]: Spent 33.88s on a formula simplification. DAG size of input: 7984 DAG size of output: 328 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)