/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 12:40:01,030 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 12:40:01,032 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 12:40:01,056 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 12:40:01,064 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 12:40:01,065 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 12:40:01,073 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 12:40:01,074 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 12:40:01,074 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 12:40:01,075 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 12:40:01,076 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 12:40:01,078 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 12:40:01,079 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 12:40:01,086 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 12:40:01,089 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 12:40:01,090 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 12:40:01,095 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 12:40:01,096 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 12:40:01,096 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 12:40:01,096 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 12:40:01,097 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 12:40:01,097 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 12:40:01,098 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 12:40:01,098 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 12:40:01,099 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 12:40:01,099 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 12:40:01,100 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 12:40:01,100 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 12:40:01,101 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 12:40:01,101 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 12:40:01,101 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 12:40:01,102 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 12:40:01,102 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 12:40:01,109 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 12:40:01,140 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 12:40:01,141 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 12:40:01,141 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 12:40:01,141 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 12:40:01,142 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 12:40:01,142 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 12:40:01,142 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 12:40:01,142 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 12:40:01,142 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 12:40:01,142 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 12:40:01,142 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 12:40:01,142 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 12:40:01,142 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 12:40:01,143 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 12:40:01,143 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 12:40:01,143 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 12:40:01,143 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 12:40:01,143 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 12:40:01,143 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 12:40:01,143 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 12:40:01,143 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 12:40:01,144 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 12:40:01,144 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 12:40:01,144 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 12:40:01,144 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 12:40:01,144 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 12:40:01,144 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 12:40:01,144 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 12:40:01,144 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 12:40:01,144 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 12:40:01,144 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 12:40:01,145 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 12:40:01,145 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:40:01,145 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 12:40:01,145 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 12:40:01,145 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 12:40:01,145 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 12:40:01,145 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 12:40:01,145 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 12:40:01,146 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 12:40:01,146 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 12:40:01,146 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 12:40:01,337 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 12:40:01,355 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 12:40:01,357 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 12:40:01,358 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 12:40:01,359 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 12:40:01,360 INFO L432 ainManager$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 [2023-04-01 12:40:02,555 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 12:40:02,796 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 12:40:02,797 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 [2023-04-01 12:40:02,812 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f16dd4f5b/aa1ff8ee31444e62af407a170725288f/FLAG70c05c947 [2023-04-01 12:40:02,823 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f16dd4f5b/aa1ff8ee31444e62af407a170725288f [2023-04-01 12:40:02,825 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 12:40:02,826 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 12:40:02,830 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 12:40:02,830 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 12:40:02,833 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 12:40:02,834 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:40:02" (1/1) ... [2023-04-01 12:40:02,834 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32c22eee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:40:02, skipping insertion in model container [2023-04-01 12:40:02,835 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:40:02" (1/1) ... [2023-04-01 12:40:02,840 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 12:40:02,869 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 12:40:03,026 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] [2023-04-01 12:40:03,050 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:40:03,065 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 12:40:03,096 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] [2023-04-01 12:40:03,113 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:40:03,129 INFO L208 MainTranslator]: Completed translation [2023-04-01 12:40:03,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:40:03 WrapperNode [2023-04-01 12:40:03,129 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 12:40:03,130 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 12:40:03,131 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 12:40:03,131 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 12:40:03,141 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:40:03" (1/1) ... [2023-04-01 12:40:03,141 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:40:03" (1/1) ... [2023-04-01 12:40:03,150 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:40:03" (1/1) ... [2023-04-01 12:40:03,150 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:40:03" (1/1) ... [2023-04-01 12:40:03,174 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:40:03" (1/1) ... [2023-04-01 12:40:03,187 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:40:03" (1/1) ... [2023-04-01 12:40:03,189 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:40:03" (1/1) ... [2023-04-01 12:40:03,191 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:40:03" (1/1) ... [2023-04-01 12:40:03,195 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 12:40:03,195 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 12:40:03,196 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 12:40:03,196 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 12:40:03,203 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:40:03" (1/1) ... [2023-04-01 12:40:03,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:40:03,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:40:03,246 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 12:40:03,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 12:40:03,286 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 12:40:03,286 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 12:40:03,286 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 12:40:03,286 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 12:40:03,287 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 12:40:03,287 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 12:40:03,287 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 12:40:03,287 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 12:40:03,288 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 12:40:03,288 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 12:40:03,288 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 12:40:03,288 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-01 12:40:03,288 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 12:40:03,288 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 12:40:03,288 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 12:40:03,288 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 12:40:03,288 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 12:40:03,289 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 12:40:03,289 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 12:40:03,289 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-01 12:40:03,289 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 12:40:03,289 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 12:40:03,289 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 12:40:03,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 12:40:03,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 12:40:03,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 12:40:03,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 12:40:03,289 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 12:40:03,290 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 12:40:03,438 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 12:40:03,440 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 12:40:03,811 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 12:40:03,942 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 12:40:03,943 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-01 12:40:03,946 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:40:03 BoogieIcfgContainer [2023-04-01 12:40:03,946 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 12:40:03,949 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 12:40:03,949 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 12:40:03,952 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 12:40:03,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:40:02" (1/3) ... [2023-04-01 12:40:03,952 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3baaeca7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:40:03, skipping insertion in model container [2023-04-01 12:40:03,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:40:03" (2/3) ... [2023-04-01 12:40:03,953 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3baaeca7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:40:03, skipping insertion in model container [2023-04-01 12:40:03,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:40:03" (3/3) ... [2023-04-01 12:40:03,954 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-01 12:40:03,970 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 12:40:03,970 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 12:40:04,027 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 12:40:04,032 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;@15758075, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 12:40:04,033 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 12:40:04,037 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) [2023-04-01 12:40:04,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-01 12:40:04,045 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:40:04,045 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:40:04,046 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:40:04,050 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:40:04,051 INFO L85 PathProgramCache]: Analyzing trace with hash -472051513, now seen corresponding path program 1 times [2023-04-01 12:40:04,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:40:04,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590413210] [2023-04-01 12:40:04,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:40:04,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:40:04,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:40:04,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:40:04,522 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:40:04,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590413210] [2023-04-01 12:40:04,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590413210] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:40:04,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:40:04,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:40:04,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067172969] [2023-04-01 12:40:04,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:40:04,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:40:04,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:40:04,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:40:04,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:40:04,568 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) [2023-04-01 12:40:04,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:40:04,643 INFO L93 Difference]: Finished difference Result 199 states and 302 transitions. [2023-04-01 12:40:04,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:40:04,645 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 [2023-04-01 12:40:04,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:40:04,652 INFO L225 Difference]: With dead ends: 199 [2023-04-01 12:40:04,653 INFO L226 Difference]: Without dead ends: 131 [2023-04-01 12:40:04,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:40:04,658 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 [2023-04-01 12:40:04,659 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] [2023-04-01 12:40:04,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-04-01 12:40:04,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2023-04-01 12:40:04,698 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) [2023-04-01 12:40:04,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 179 transitions. [2023-04-01 12:40:04,701 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 179 transitions. Word has length 41 [2023-04-01 12:40:04,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:40:04,702 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 179 transitions. [2023-04-01 12:40:04,702 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) [2023-04-01 12:40:04,702 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 179 transitions. [2023-04-01 12:40:04,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-04-01 12:40:04,704 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:40:04,704 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] [2023-04-01 12:40:04,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 12:40:04,704 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:40:04,705 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:40:04,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1678701204, now seen corresponding path program 1 times [2023-04-01 12:40:04,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:40:04,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847745117] [2023-04-01 12:40:04,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:40:04,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:40:04,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:40:04,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:40:04,793 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:40:04,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847745117] [2023-04-01 12:40:04,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847745117] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:40:04,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:40:04,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:40:04,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018489399] [2023-04-01 12:40:04,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:40:04,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:40:04,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:40:04,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:40:04,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:40:04,796 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) [2023-04-01 12:40:04,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:40:04,867 INFO L93 Difference]: Finished difference Result 305 states and 443 transitions. [2023-04-01 12:40:04,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:40:04,867 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 [2023-04-01 12:40:04,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:40:04,869 INFO L225 Difference]: With dead ends: 305 [2023-04-01 12:40:04,869 INFO L226 Difference]: Without dead ends: 206 [2023-04-01 12:40:04,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:40:04,872 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, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:40:04,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 219 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:40:04,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2023-04-01 12:40:04,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 204. [2023-04-01 12:40:04,913 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) [2023-04-01 12:40:04,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 291 transitions. [2023-04-01 12:40:04,922 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 291 transitions. Word has length 44 [2023-04-01 12:40:04,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:40:04,923 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 291 transitions. [2023-04-01 12:40:04,923 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) [2023-04-01 12:40:04,923 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 291 transitions. [2023-04-01 12:40:04,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-01 12:40:04,927 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:40:04,927 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] [2023-04-01 12:40:04,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 12:40:04,927 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:40:04,928 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:40:04,928 INFO L85 PathProgramCache]: Analyzing trace with hash -416097592, now seen corresponding path program 1 times [2023-04-01 12:40:04,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:40:04,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31862409] [2023-04-01 12:40:04,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:40:04,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:40:04,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:40:05,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:40:05,057 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:40:05,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31862409] [2023-04-01 12:40:05,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31862409] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:40:05,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:40:05,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:40:05,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357478167] [2023-04-01 12:40:05,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:40:05,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:40:05,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:40:05,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:40:05,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:40:05,062 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) [2023-04-01 12:40:05,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:40:05,161 INFO L93 Difference]: Finished difference Result 508 states and 745 transitions. [2023-04-01 12:40:05,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:40:05,162 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 [2023-04-01 12:40:05,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:40:05,167 INFO L225 Difference]: With dead ends: 508 [2023-04-01 12:40:05,167 INFO L226 Difference]: Without dead ends: 334 [2023-04-01 12:40:05,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:40:05,176 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 [2023-04-01 12:40:05,177 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] [2023-04-01 12:40:05,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2023-04-01 12:40:05,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 332. [2023-04-01 12:40:05,238 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) [2023-04-01 12:40:05,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 479 transitions. [2023-04-01 12:40:05,241 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 479 transitions. Word has length 47 [2023-04-01 12:40:05,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:40:05,241 INFO L495 AbstractCegarLoop]: Abstraction has 332 states and 479 transitions. [2023-04-01 12:40:05,241 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) [2023-04-01 12:40:05,241 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 479 transitions. [2023-04-01 12:40:05,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-04-01 12:40:05,243 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:40:05,244 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] [2023-04-01 12:40:05,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 12:40:05,244 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:40:05,244 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:40:05,245 INFO L85 PathProgramCache]: Analyzing trace with hash 2036743711, now seen corresponding path program 1 times [2023-04-01 12:40:05,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:40:05,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246038032] [2023-04-01 12:40:05,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:40:05,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:40:05,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:40:05,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:40:05,361 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:40:05,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246038032] [2023-04-01 12:40:05,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246038032] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:40:05,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:40:05,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:40:05,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825777512] [2023-04-01 12:40:05,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:40:05,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:40:05,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:40:05,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:40:05,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:40:05,364 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) [2023-04-01 12:40:05,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:40:05,481 INFO L93 Difference]: Finished difference Result 848 states and 1241 transitions. [2023-04-01 12:40:05,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:40:05,482 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 [2023-04-01 12:40:05,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:40:05,486 INFO L225 Difference]: With dead ends: 848 [2023-04-01 12:40:05,487 INFO L226 Difference]: Without dead ends: 546 [2023-04-01 12:40:05,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:40:05,497 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 [2023-04-01 12:40:05,498 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] [2023-04-01 12:40:05,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2023-04-01 12:40:05,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 544. [2023-04-01 12:40:05,596 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) [2023-04-01 12:40:05,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 783 transitions. [2023-04-01 12:40:05,598 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 783 transitions. Word has length 50 [2023-04-01 12:40:05,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:40:05,598 INFO L495 AbstractCegarLoop]: Abstraction has 544 states and 783 transitions. [2023-04-01 12:40:05,599 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) [2023-04-01 12:40:05,599 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 783 transitions. [2023-04-01 12:40:05,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-01 12:40:05,603 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:40:05,604 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] [2023-04-01 12:40:05,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 12:40:05,604 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:40:05,605 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:40:05,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1310305150, now seen corresponding path program 1 times [2023-04-01 12:40:05,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:40:05,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514722205] [2023-04-01 12:40:05,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:40:05,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:40:05,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:40:05,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:40:05,791 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:40:05,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514722205] [2023-04-01 12:40:05,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514722205] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:40:05,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:40:05,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 12:40:05,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399714836] [2023-04-01 12:40:05,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:40:05,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 12:40:05,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:40:05,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 12:40:05,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-04-01 12:40:05,797 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) [2023-04-01 12:40:06,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:40:06,219 INFO L93 Difference]: Finished difference Result 2248 states and 3251 transitions. [2023-04-01 12:40:06,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 12:40:06,219 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 [2023-04-01 12:40:06,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:40:06,227 INFO L225 Difference]: With dead ends: 2248 [2023-04-01 12:40:06,227 INFO L226 Difference]: Without dead ends: 1734 [2023-04-01 12:40:06,228 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 [2023-04-01 12:40:06,229 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 283 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2023-04-01 12:40:06,229 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] [2023-04-01 12:40:06,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2023-04-01 12:40:06,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1728. [2023-04-01 12:40:06,530 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) [2023-04-01 12:40:06,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1728 states to 1728 states and 2487 transitions. [2023-04-01 12:40:06,538 INFO L78 Accepts]: Start accepts. Automaton has 1728 states and 2487 transitions. Word has length 53 [2023-04-01 12:40:06,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:40:06,539 INFO L495 AbstractCegarLoop]: Abstraction has 1728 states and 2487 transitions. [2023-04-01 12:40:06,539 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) [2023-04-01 12:40:06,540 INFO L276 IsEmpty]: Start isEmpty. Operand 1728 states and 2487 transitions. [2023-04-01 12:40:06,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-01 12:40:06,541 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:40:06,542 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] [2023-04-01 12:40:06,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 12:40:06,542 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:40:06,542 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:40:06,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1467113173, now seen corresponding path program 1 times [2023-04-01 12:40:06,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:40:06,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403496829] [2023-04-01 12:40:06,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:40:06,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:40:06,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:40:06,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:40:06,655 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:40:06,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403496829] [2023-04-01 12:40:06,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403496829] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:40:06,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:40:06,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:40:06,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766887137] [2023-04-01 12:40:06,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:40:06,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:40:06,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:40:06,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:40:06,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:40:06,658 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) [2023-04-01 12:40:07,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:40:07,402 INFO L93 Difference]: Finished difference Result 4434 states and 6431 transitions. [2023-04-01 12:40:07,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:40:07,403 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 [2023-04-01 12:40:07,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:40:07,413 INFO L225 Difference]: With dead ends: 4434 [2023-04-01 12:40:07,414 INFO L226 Difference]: Without dead ends: 2736 [2023-04-01 12:40:07,417 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 [2023-04-01 12:40:07,418 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 [2023-04-01 12:40:07,418 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] [2023-04-01 12:40:07,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2736 states. [2023-04-01 12:40:07,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2736 to 2734. [2023-04-01 12:40:07,966 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) [2023-04-01 12:40:07,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2734 states to 2734 states and 3917 transitions. [2023-04-01 12:40:07,976 INFO L78 Accepts]: Start accepts. Automaton has 2734 states and 3917 transitions. Word has length 55 [2023-04-01 12:40:07,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:40:07,976 INFO L495 AbstractCegarLoop]: Abstraction has 2734 states and 3917 transitions. [2023-04-01 12:40:07,976 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) [2023-04-01 12:40:07,976 INFO L276 IsEmpty]: Start isEmpty. Operand 2734 states and 3917 transitions. [2023-04-01 12:40:07,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-01 12:40:07,977 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:40:07,977 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] [2023-04-01 12:40:07,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 12:40:07,977 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:40:07,978 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:40:07,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1861974800, now seen corresponding path program 1 times [2023-04-01 12:40:07,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:40:07,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647655589] [2023-04-01 12:40:07,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:40:07,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:40:08,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:40:08,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:40:08,391 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:40:08,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647655589] [2023-04-01 12:40:08,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647655589] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:40:08,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:40:08,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 12:40:08,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018742150] [2023-04-01 12:40:08,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:40:08,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 12:40:08,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:40:08,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 12:40:08,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-04-01 12:40:08,393 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) [2023-04-01 12:40:09,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:40:09,604 INFO L93 Difference]: Finished difference Result 5166 states and 7423 transitions. [2023-04-01 12:40:09,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 12:40:09,605 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 [2023-04-01 12:40:09,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:40:09,625 INFO L225 Difference]: With dead ends: 5166 [2023-04-01 12:40:09,626 INFO L226 Difference]: Without dead ends: 5164 [2023-04-01 12:40:09,628 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 [2023-04-01 12:40:09,628 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 [2023-04-01 12:40:09,628 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] [2023-04-01 12:40:09,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5164 states. [2023-04-01 12:40:10,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5164 to 2981. [2023-04-01 12:40:10,097 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) [2023-04-01 12:40:10,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2981 states to 2981 states and 4272 transitions. [2023-04-01 12:40:10,109 INFO L78 Accepts]: Start accepts. Automaton has 2981 states and 4272 transitions. Word has length 55 [2023-04-01 12:40:10,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:40:10,109 INFO L495 AbstractCegarLoop]: Abstraction has 2981 states and 4272 transitions. [2023-04-01 12:40:10,109 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) [2023-04-01 12:40:10,110 INFO L276 IsEmpty]: Start isEmpty. Operand 2981 states and 4272 transitions. [2023-04-01 12:40:10,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-04-01 12:40:10,111 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:40:10,111 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] [2023-04-01 12:40:10,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 12:40:10,111 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:40:10,112 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:40:10,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1265444710, now seen corresponding path program 1 times [2023-04-01 12:40:10,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:40:10,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405419967] [2023-04-01 12:40:10,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:40:10,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:40:10,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:40:11,358 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:40:11,359 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:40:11,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405419967] [2023-04-01 12:40:11,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405419967] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:40:11,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033687209] [2023-04-01 12:40:11,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:40:11,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:40:11,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:40:11,367 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 12:40:11,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 12:40:11,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:40:11,543 INFO L262 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 60 conjunts are in the unsatisfiable core [2023-04-01 12:40:11,553 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:40:13,462 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:40:13,463 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 12:40:21,076 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:40:21,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033687209] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 12:40:21,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1877099854] [2023-04-01 12:40:21,131 INFO L159 IcfgInterpreter]: Started Sifa with 56 locations of interest [2023-04-01 12:40:21,131 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 12:40:21,135 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 12:40:21,139 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 12:40:21,140 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 12:40:22,482 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 180 for LOIs [2023-04-01 12:40:35,856 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2023-04-01 12:40:36,714 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2023-04-01 12:40:50,554 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2023-04-01 12:40:51,930 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 23 [2023-04-01 12:40:52,161 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 18368 conjuctions. This might take some time... [2023-04-01 12:40:52,547 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 168 conjuctions. [2023-04-01 12:40:56,542 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8