/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.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 12:42:36,481 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 12:42:36,482 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 12:42:36,518 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 12:42:36,518 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 12:42:36,520 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 12:42:36,523 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 12:42:36,525 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 12:42:36,526 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 12:42:36,529 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 12:42:36,530 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 12:42:36,532 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 12:42:36,532 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 12:42:36,534 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 12:42:36,535 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 12:42:36,535 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 12:42:36,536 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 12:42:36,536 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 12:42:36,538 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 12:42:36,541 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 12:42:36,542 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 12:42:36,543 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 12:42:36,544 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 12:42:36,545 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 12:42:36,550 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 12:42:36,551 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 12:42:36,551 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 12:42:36,552 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 12:42:36,552 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 12:42:36,552 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 12:42:36,553 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 12:42:36,553 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 12:42:36,554 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 12:42:36,555 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 12:42:36,556 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 12:42:36,556 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 12:42:36,556 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 12:42:36,557 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 12:42:36,557 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 12:42:36,557 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 12:42:36,558 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 12:42:36,559 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 12:42:36,585 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 12:42:36,586 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 12:42:36,586 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 12:42:36,586 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 12:42:36,587 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 12:42:36,587 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 12:42:36,587 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 12:42:36,587 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 12:42:36,587 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 12:42:36,587 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 12:42:36,588 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 12:42:36,588 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 12:42:36,588 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 12:42:36,588 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 12:42:36,589 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 12:42:36,589 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 12:42:36,589 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 12:42:36,589 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 12:42:36,589 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 12:42:36,589 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 12:42:36,590 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 12:42:36,590 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 12:42:36,590 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 12:42:36,590 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 12:42:36,590 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 12:42:36,590 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 12:42:36,590 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 12:42:36,590 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 12:42:36,590 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 12:42:36,591 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 12:42:36,591 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 12:42:36,591 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 12:42:36,591 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:42:36,591 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 12:42:36,591 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 12:42:36,591 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 12:42:36,592 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 12:42:36,592 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 12:42:36,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 12:42:36,592 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 12:42:36,592 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 12:42:36,592 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 12:42:36,776 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 12:42:36,790 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 12:42:36,792 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 12:42:36,793 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 12:42:36,793 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 12:42:36,794 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2023-04-01 12:42:37,717 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 12:42:37,884 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 12:42:37,885 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2023-04-01 12:42:37,894 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e657c7a14/03fb7005edac4df187d63d8cc9aefd51/FLAGb760b7bc3 [2023-04-01 12:42:37,906 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e657c7a14/03fb7005edac4df187d63d8cc9aefd51 [2023-04-01 12:42:37,907 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 12:42:37,909 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 12:42:37,911 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 12:42:37,911 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 12:42:37,913 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 12:42:37,913 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:42:37" (1/1) ... [2023-04-01 12:42:37,914 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43977da2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:42:37, skipping insertion in model container [2023-04-01 12:42:37,915 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:42:37" (1/1) ... [2023-04-01 12:42:37,919 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 12:42:37,952 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 12:42:38,082 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.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[4069,4082] [2023-04-01 12:42:38,094 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:42:38,110 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 12:42:38,128 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.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[4069,4082] [2023-04-01 12:42:38,134 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:42:38,145 INFO L208 MainTranslator]: Completed translation [2023-04-01 12:42:38,146 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:42:38 WrapperNode [2023-04-01 12:42:38,146 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 12:42:38,147 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 12:42:38,147 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 12:42:38,147 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 12:42:38,155 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:42:38" (1/1) ... [2023-04-01 12:42:38,155 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:42:38" (1/1) ... [2023-04-01 12:42:38,166 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:42:38" (1/1) ... [2023-04-01 12:42:38,166 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:42:38" (1/1) ... [2023-04-01 12:42:38,172 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:42:38" (1/1) ... [2023-04-01 12:42:38,175 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:42:38" (1/1) ... [2023-04-01 12:42:38,176 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:42:38" (1/1) ... [2023-04-01 12:42:38,177 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:42:38" (1/1) ... [2023-04-01 12:42:38,179 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 12:42:38,179 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 12:42:38,179 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 12:42:38,179 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 12:42:38,180 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:42:38" (1/1) ... [2023-04-01 12:42:38,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:42:38,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:42:38,206 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 12:42:38,208 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 12:42:38,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 12:42:38,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 12:42:38,230 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 12:42:38,230 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 12:42:38,230 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 12:42:38,230 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 12:42:38,230 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 12:42:38,230 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 12:42:38,230 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 12:42:38,230 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 12:42:38,231 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 12:42:38,231 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 12:42:38,231 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 12:42:38,231 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 12:42:38,231 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 12:42:38,231 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 12:42:38,231 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 12:42:38,231 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 12:42:38,231 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 12:42:38,231 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 12:42:38,231 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 12:42:38,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 12:42:38,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 12:42:38,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 12:42:38,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 12:42:38,232 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 12:42:38,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 12:42:38,317 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 12:42:38,319 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 12:42:38,557 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 12:42:38,618 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 12:42:38,618 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-01 12:42:38,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:42:38 BoogieIcfgContainer [2023-04-01 12:42:38,622 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 12:42:38,623 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 12:42:38,623 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 12:42:38,625 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 12:42:38,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:42:37" (1/3) ... [2023-04-01 12:42:38,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32fa5bde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:42:38, skipping insertion in model container [2023-04-01 12:42:38,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:42:38" (2/3) ... [2023-04-01 12:42:38,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32fa5bde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:42:38, skipping insertion in model container [2023-04-01 12:42:38,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:42:38" (3/3) ... [2023-04-01 12:42:38,627 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2023-04-01 12:42:38,638 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 12:42:38,638 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 12:42:38,668 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 12:42:38,673 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;@1f2faa67, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 12:42:38,673 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 12:42:38,678 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 47 states have (on average 1.702127659574468) internal successors, (80), 49 states have internal predecessors, (80), 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 12:42:38,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-01 12:42:38,685 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:42:38,685 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:42:38,687 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:42:38,693 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:42:38,694 INFO L85 PathProgramCache]: Analyzing trace with hash 729460363, now seen corresponding path program 1 times [2023-04-01 12:42:38,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:42:38,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056279565] [2023-04-01 12:42:38,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:42:38,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:42:38,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:42:39,016 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 12:42:39,016 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:42:39,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056279565] [2023-04-01 12:42:39,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056279565] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:42:39,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:42:39,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:42:39,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689096847] [2023-04-01 12:42:39,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:42:39,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:42:39,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:42:39,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:42:39,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:42:39,043 INFO L87 Difference]: Start difference. First operand has 54 states, 47 states have (on average 1.702127659574468) internal successors, (80), 49 states have internal predecessors, (80), 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 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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 12:42:39,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:42:39,097 INFO L93 Difference]: Finished difference Result 114 states and 168 transitions. [2023-04-01 12:42:39,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:42:39,099 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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 33 [2023-04-01 12:42:39,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:42:39,104 INFO L225 Difference]: With dead ends: 114 [2023-04-01 12:42:39,104 INFO L226 Difference]: Without dead ends: 72 [2023-04-01 12:42:39,106 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 12:42:39,108 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 55 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:42:39,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 150 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:42:39,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-04-01 12:42:39,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2023-04-01 12:42:39,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 66 states have (on average 1.3484848484848484) internal successors, (89), 66 states have internal predecessors, (89), 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 12:42:39,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 92 transitions. [2023-04-01 12:42:39,137 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 92 transitions. Word has length 33 [2023-04-01 12:42:39,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:42:39,138 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 92 transitions. [2023-04-01 12:42:39,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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 12:42:39,138 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 92 transitions. [2023-04-01 12:42:39,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-04-01 12:42:39,139 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:42:39,139 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:42:39,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 12:42:39,139 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:42:39,140 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:42:39,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1774531646, now seen corresponding path program 1 times [2023-04-01 12:42:39,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:42:39,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994500419] [2023-04-01 12:42:39,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:42:39,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:42:39,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:42:39,255 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 12:42:39,255 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:42:39,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994500419] [2023-04-01 12:42:39,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994500419] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:42:39,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:42:39,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:42:39,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658990498] [2023-04-01 12:42:39,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:42:39,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:42:39,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:42:39,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:42:39,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:42:39,258 INFO L87 Difference]: Start difference. First operand 70 states and 92 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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 12:42:39,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:42:39,297 INFO L93 Difference]: Finished difference Result 158 states and 220 transitions. [2023-04-01 12:42:39,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:42:39,298 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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 36 [2023-04-01 12:42:39,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:42:39,299 INFO L225 Difference]: With dead ends: 158 [2023-04-01 12:42:39,299 INFO L226 Difference]: Without dead ends: 110 [2023-04-01 12:42:39,300 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 12:42:39,301 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 33 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:42:39,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 114 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:42:39,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-04-01 12:42:39,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2023-04-01 12:42:39,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 104 states have (on average 1.3846153846153846) internal successors, (144), 104 states have internal predecessors, (144), 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 12:42:39,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 147 transitions. [2023-04-01 12:42:39,320 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 147 transitions. Word has length 36 [2023-04-01 12:42:39,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:42:39,320 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 147 transitions. [2023-04-01 12:42:39,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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 12:42:39,320 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 147 transitions. [2023-04-01 12:42:39,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-04-01 12:42:39,321 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:42:39,321 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:42:39,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 12:42:39,321 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:42:39,322 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:42:39,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1085474026, now seen corresponding path program 1 times [2023-04-01 12:42:39,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:42:39,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128026463] [2023-04-01 12:42:39,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:42:39,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:42:39,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:42:39,407 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 12:42:39,407 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:42:39,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128026463] [2023-04-01 12:42:39,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128026463] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:42:39,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:42:39,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:42:39,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903756071] [2023-04-01 12:42:39,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:42:39,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:42:39,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:42:39,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:42:39,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:42:39,414 INFO L87 Difference]: Start difference. First operand 108 states and 147 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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 12:42:39,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:42:39,475 INFO L93 Difference]: Finished difference Result 264 states and 373 transitions. [2023-04-01 12:42:39,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:42:39,475 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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 39 [2023-04-01 12:42:39,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:42:39,478 INFO L225 Difference]: With dead ends: 264 [2023-04-01 12:42:39,478 INFO L226 Difference]: Without dead ends: 178 [2023-04-01 12:42:39,478 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 12:42:39,479 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 28 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:42:39,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 110 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:42:39,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2023-04-01 12:42:39,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 176. [2023-04-01 12:42:39,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 172 states have (on average 1.3953488372093024) internal successors, (240), 172 states have internal predecessors, (240), 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 12:42:39,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 243 transitions. [2023-04-01 12:42:39,502 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 243 transitions. Word has length 39 [2023-04-01 12:42:39,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:42:39,502 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 243 transitions. [2023-04-01 12:42:39,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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 12:42:39,502 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 243 transitions. [2023-04-01 12:42:39,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-01 12:42:39,503 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:42:39,503 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:42:39,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 12:42:39,503 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:42:39,504 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:42:39,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1044342312, now seen corresponding path program 1 times [2023-04-01 12:42:39,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:42:39,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356557817] [2023-04-01 12:42:39,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:42:39,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:42:39,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:42:39,616 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 12:42:39,616 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:42:39,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356557817] [2023-04-01 12:42:39,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356557817] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:42:39,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:42:39,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:42:39,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021304374] [2023-04-01 12:42:39,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:42:39,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:42:39,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:42:39,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:42:39,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:42:39,619 INFO L87 Difference]: Start difference. First operand 176 states and 243 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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 12:42:39,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:42:39,782 INFO L93 Difference]: Finished difference Result 668 states and 942 transitions. [2023-04-01 12:42:39,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 12:42:39,783 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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 42 [2023-04-01 12:42:39,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:42:39,787 INFO L225 Difference]: With dead ends: 668 [2023-04-01 12:42:39,788 INFO L226 Difference]: Without dead ends: 514 [2023-04-01 12:42:39,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-04-01 12:42:39,797 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 203 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:42:39,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 360 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:42:39,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2023-04-01 12:42:39,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 260. [2023-04-01 12:42:39,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 256 states have (on average 1.38671875) internal successors, (355), 256 states have internal predecessors, (355), 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 12:42:39,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 358 transitions. [2023-04-01 12:42:39,849 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 358 transitions. Word has length 42 [2023-04-01 12:42:39,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:42:39,850 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 358 transitions. [2023-04-01 12:42:39,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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 12:42:39,850 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 358 transitions. [2023-04-01 12:42:39,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-04-01 12:42:39,853 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:42:39,853 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 12:42:39,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 12:42:39,853 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:42:39,854 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:42:39,854 INFO L85 PathProgramCache]: Analyzing trace with hash 536240978, now seen corresponding path program 1 times [2023-04-01 12:42:39,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:42:39,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134739263] [2023-04-01 12:42:39,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:42:39,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:42:39,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:42:40,010 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 12:42:40,010 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:42:40,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134739263] [2023-04-01 12:42:40,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134739263] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:42:40,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:42:40,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:42:40,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280685342] [2023-04-01 12:42:40,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:42:40,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:42:40,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:42:40,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:42:40,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:42:40,012 INFO L87 Difference]: Start difference. First operand 260 states and 358 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 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 12:42:40,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:42:40,087 INFO L93 Difference]: Finished difference Result 500 states and 695 transitions. [2023-04-01 12:42:40,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:42:40,091 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 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 12:42:40,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:42:40,093 INFO L225 Difference]: With dead ends: 500 [2023-04-01 12:42:40,093 INFO L226 Difference]: Without dead ends: 262 [2023-04-01 12:42:40,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-04-01 12:42:40,096 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 54 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:42:40,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 129 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:42:40,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2023-04-01 12:42:40,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 260. [2023-04-01 12:42:40,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 256 states have (on average 1.3828125) internal successors, (354), 256 states have internal predecessors, (354), 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 12:42:40,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 357 transitions. [2023-04-01 12:42:40,157 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 357 transitions. Word has length 44 [2023-04-01 12:42:40,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:42:40,158 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 357 transitions. [2023-04-01 12:42:40,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 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 12:42:40,158 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 357 transitions. [2023-04-01 12:42:40,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-04-01 12:42:40,162 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:42:40,162 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 12:42:40,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 12:42:40,162 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:42:40,162 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:42:40,162 INFO L85 PathProgramCache]: Analyzing trace with hash 516191635, now seen corresponding path program 1 times [2023-04-01 12:42:40,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:42:40,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141268174] [2023-04-01 12:42:40,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:42:40,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:42:40,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:42:40,225 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 12:42:40,225 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:42:40,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141268174] [2023-04-01 12:42:40,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141268174] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:42:40,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:42:40,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:42:40,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377288688] [2023-04-01 12:42:40,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:42:40,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:42:40,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:42:40,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:42:40,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:42:40,227 INFO L87 Difference]: Start difference. First operand 260 states and 357 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 12:42:40,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:42:40,293 INFO L93 Difference]: Finished difference Result 646 states and 905 transitions. [2023-04-01 12:42:40,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:42:40,294 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 12:42:40,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:42:40,296 INFO L225 Difference]: With dead ends: 646 [2023-04-01 12:42:40,296 INFO L226 Difference]: Without dead ends: 408 [2023-04-01 12:42:40,297 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 12:42:40,298 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 22 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:42:40,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 91 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:42:40,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2023-04-01 12:42:40,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 406. [2023-04-01 12:42:40,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 402 states have (on average 1.3955223880597014) internal successors, (561), 402 states have internal predecessors, (561), 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 12:42:40,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 564 transitions. [2023-04-01 12:42:40,340 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 564 transitions. Word has length 44 [2023-04-01 12:42:40,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:42:40,340 INFO L495 AbstractCegarLoop]: Abstraction has 406 states and 564 transitions. [2023-04-01 12:42:40,340 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 12:42:40,340 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 564 transitions. [2023-04-01 12:42:40,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-01 12:42:40,341 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:42:40,342 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] [2023-04-01 12:42:40,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 12:42:40,342 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:42:40,343 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:42:40,343 INFO L85 PathProgramCache]: Analyzing trace with hash -558308284, now seen corresponding path program 1 times [2023-04-01 12:42:40,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:42:40,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583559292] [2023-04-01 12:42:40,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:42:40,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:42:40,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:42:40,419 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 12:42:40,420 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:42:40,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583559292] [2023-04-01 12:42:40,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583559292] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:42:40,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:42:40,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:42:40,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122297675] [2023-04-01 12:42:40,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:42:40,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:42:40,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:42:40,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:42:40,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:42:40,422 INFO L87 Difference]: Start difference. First operand 406 states and 564 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 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 12:42:40,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:42:40,506 INFO L93 Difference]: Finished difference Result 788 states and 1104 transitions. [2023-04-01 12:42:40,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:42:40,515 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 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 45 [2023-04-01 12:42:40,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:42:40,517 INFO L225 Difference]: With dead ends: 788 [2023-04-01 12:42:40,517 INFO L226 Difference]: Without dead ends: 406 [2023-04-01 12:42:40,518 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 12:42:40,518 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 115 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:42:40,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 60 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:42:40,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2023-04-01 12:42:40,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 406. [2023-04-01 12:42:40,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 402 states have (on average 1.3756218905472637) internal successors, (553), 402 states have internal predecessors, (553), 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 12:42:40,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 556 transitions. [2023-04-01 12:42:40,566 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 556 transitions. Word has length 45 [2023-04-01 12:42:40,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:42:40,566 INFO L495 AbstractCegarLoop]: Abstraction has 406 states and 556 transitions. [2023-04-01 12:42:40,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 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 12:42:40,567 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 556 transitions. [2023-04-01 12:42:40,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-01 12:42:40,568 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:42:40,568 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] [2023-04-01 12:42:40,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 12:42:40,568 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:42:40,568 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:42:40,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1087598785, now seen corresponding path program 1 times [2023-04-01 12:42:40,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:42:40,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148011937] [2023-04-01 12:42:40,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:42:40,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:42:40,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:42:40,646 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 12:42:40,647 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:42:40,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148011937] [2023-04-01 12:42:40,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148011937] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:42:40,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:42:40,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:42:40,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117208514] [2023-04-01 12:42:40,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:42:40,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:42:40,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:42:40,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:42:40,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:42:40,651 INFO L87 Difference]: Start difference. First operand 406 states and 556 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 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 12:42:40,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:42:40,759 INFO L93 Difference]: Finished difference Result 790 states and 1089 transitions. [2023-04-01 12:42:40,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:42:40,759 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 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 45 [2023-04-01 12:42:40,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:42:40,761 INFO L225 Difference]: With dead ends: 790 [2023-04-01 12:42:40,761 INFO L226 Difference]: Without dead ends: 408 [2023-04-01 12:42:40,761 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 12:42:40,762 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 203 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:42:40,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 66 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:42:40,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2023-04-01 12:42:40,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 406. [2023-04-01 12:42:40,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 402 states have (on average 1.355721393034826) internal successors, (545), 402 states have internal predecessors, (545), 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 12:42:40,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 548 transitions. [2023-04-01 12:42:40,810 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 548 transitions. Word has length 45 [2023-04-01 12:42:40,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:42:40,810 INFO L495 AbstractCegarLoop]: Abstraction has 406 states and 548 transitions. [2023-04-01 12:42:40,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 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 12:42:40,810 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 548 transitions. [2023-04-01 12:42:40,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-01 12:42:40,811 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:42:40,811 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] [2023-04-01 12:42:40,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 12:42:40,811 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:42:40,811 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:42:40,811 INFO L85 PathProgramCache]: Analyzing trace with hash -959513478, now seen corresponding path program 1 times [2023-04-01 12:42:40,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:42:40,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038518720] [2023-04-01 12:42:40,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:42:40,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:42:40,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:42:40,982 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 12:42:40,982 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:42:40,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038518720] [2023-04-01 12:42:40,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038518720] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:42:40,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:42:40,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:42:40,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451583638] [2023-04-01 12:42:40,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:42:40,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:42:40,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:42:40,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:42:40,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:42:40,984 INFO L87 Difference]: Start difference. First operand 406 states and 548 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 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 12:42:41,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:42:41,103 INFO L93 Difference]: Finished difference Result 643 states and 860 transitions. [2023-04-01 12:42:41,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 12:42:41,104 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 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 45 [2023-04-01 12:42:41,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:42:41,106 INFO L225 Difference]: With dead ends: 643 [2023-04-01 12:42:41,106 INFO L226 Difference]: Without dead ends: 641 [2023-04-01 12:42:41,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 12:42:41,108 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 63 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:42:41,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 265 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:42:41,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2023-04-01 12:42:41,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 422. [2023-04-01 12:42:41,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 418 states have (on average 1.313397129186603) internal successors, (549), 418 states have internal predecessors, (549), 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 12:42:41,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 552 transitions. [2023-04-01 12:42:41,171 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 552 transitions. Word has length 45 [2023-04-01 12:42:41,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:42:41,172 INFO L495 AbstractCegarLoop]: Abstraction has 422 states and 552 transitions. [2023-04-01 12:42:41,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 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 12:42:41,173 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 552 transitions. [2023-04-01 12:42:41,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-01 12:42:41,173 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:42:41,173 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] [2023-04-01 12:42:41,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 12:42:41,173 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:42:41,174 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:42:41,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1441930028, now seen corresponding path program 1 times [2023-04-01 12:42:41,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:42:41,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155154501] [2023-04-01 12:42:41,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:42:41,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:42:41,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:42:43,564 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:42:43,564 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:42:43,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155154501] [2023-04-01 12:42:43,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155154501] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:42:43,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416995764] [2023-04-01 12:42:43,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:42:43,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:42:43,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:42:43,567 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 12:42:43,600 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 12:42:43,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:42:43,699 INFO L262 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 49 conjunts are in the unsatisfiable core [2023-04-01 12:42:43,705 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:42:46,729 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:42:46,729 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 12:43:07,746 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:43:07,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416995764] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 12:43:07,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1331568576] [2023-04-01 12:43:07,779 INFO L159 IcfgInterpreter]: Started Sifa with 46 locations of interest [2023-04-01 12:43:07,779 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 12:43:07,782 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 12:43:07,785 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 12:43:07,785 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 12:43:08,489 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 142 for LOIs [2023-04-01 12:43:21,525 WARN L223 SmtUtils]: Spent 8.80s on a formula simplification. DAG size of input: 237 DAG size of output: 236 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-04-01 12:43:33,447 WARN L223 SmtUtils]: Spent 8.42s on a formula simplification. DAG size of input: 236 DAG size of output: 235 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)