/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_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 12:48:59,561 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 12:48:59,562 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 12:48:59,585 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 12:48:59,586 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 12:48:59,586 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 12:48:59,587 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 12:48:59,589 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 12:48:59,590 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 12:48:59,590 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 12:48:59,591 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 12:48:59,592 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 12:48:59,592 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 12:48:59,593 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 12:48:59,594 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 12:48:59,594 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 12:48:59,595 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 12:48:59,595 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 12:48:59,603 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 12:48:59,604 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 12:48:59,605 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 12:48:59,606 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 12:48:59,607 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 12:48:59,607 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 12:48:59,610 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 12:48:59,610 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 12:48:59,610 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 12:48:59,611 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 12:48:59,611 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 12:48:59,612 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 12:48:59,612 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 12:48:59,613 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 12:48:59,613 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 12:48:59,614 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 12:48:59,614 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 12:48:59,614 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 12:48:59,615 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 12:48:59,615 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 12:48:59,615 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 12:48:59,616 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 12:48:59,616 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 12:48:59,625 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 12:48:59,640 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 12:48:59,641 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 12:48:59,641 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 12:48:59,641 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 12:48:59,641 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 12:48:59,642 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 12:48:59,642 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 12:48:59,642 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 12:48:59,642 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 12:48:59,642 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 12:48:59,642 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 12:48:59,642 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 12:48:59,642 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 12:48:59,642 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 12:48:59,643 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 12:48:59,643 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 12:48:59,643 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 12:48:59,643 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 12:48:59,643 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 12:48:59,643 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 12:48:59,643 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 12:48:59,644 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 12:48:59,644 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 12:48:59,644 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 12:48:59,644 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 12:48:59,644 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 12:48:59,644 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 12:48:59,644 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 12:48:59,644 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 12:48:59,644 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 12:48:59,644 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 12:48:59,645 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 12:48:59,645 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:48:59,645 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 12:48:59,645 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 12:48:59,645 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 12:48:59,645 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 12:48:59,645 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 12:48:59,645 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 12:48:59,645 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 12:48:59,646 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 12:48:59,646 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 12:48:59,846 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 12:48:59,863 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 12:48:59,866 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 12:48:59,866 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 12:48:59,867 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 12:48:59,868 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2023-04-01 12:49:00,864 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 12:49:01,051 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 12:49:01,052 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2023-04-01 12:49:01,061 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8e982651/def257cf69ca48ebaafb4db4c08da9b0/FLAG1e13e2d03 [2023-04-01 12:49:01,071 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8e982651/def257cf69ca48ebaafb4db4c08da9b0 [2023-04-01 12:49:01,073 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 12:49:01,074 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 12:49:01,074 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 12:49:01,074 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 12:49:01,077 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 12:49:01,077 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:49:01" (1/1) ... [2023-04-01 12:49:01,078 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13138200 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:49:01, skipping insertion in model container [2023-04-01 12:49:01,078 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:49:01" (1/1) ... [2023-04-01 12:49:01,083 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 12:49:01,119 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 12:49:01,291 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_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[7638,7651] [2023-04-01 12:49:01,329 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:49:01,342 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 12:49:01,374 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_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[7638,7651] [2023-04-01 12:49:01,389 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:49:01,408 INFO L208 MainTranslator]: Completed translation [2023-04-01 12:49:01,409 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:49:01 WrapperNode [2023-04-01 12:49:01,409 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 12:49:01,410 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 12:49:01,410 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 12:49:01,410 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 12:49:01,418 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:49:01" (1/1) ... [2023-04-01 12:49:01,418 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:49:01" (1/1) ... [2023-04-01 12:49:01,446 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:49:01" (1/1) ... [2023-04-01 12:49:01,447 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:49:01" (1/1) ... [2023-04-01 12:49:01,459 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:49:01" (1/1) ... [2023-04-01 12:49:01,464 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:49:01" (1/1) ... [2023-04-01 12:49:01,467 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:49:01" (1/1) ... [2023-04-01 12:49:01,469 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:49:01" (1/1) ... [2023-04-01 12:49:01,478 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 12:49:01,478 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 12:49:01,479 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 12:49:01,479 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 12:49:01,479 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:49:01" (1/1) ... [2023-04-01 12:49:01,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:49:01,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:49:01,508 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 12:49:01,515 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 12:49:01,537 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 12:49:01,538 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 12:49:01,538 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 12:49:01,538 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 12:49:01,538 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 12:49:01,538 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 12:49:01,538 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 12:49:01,538 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 12:49:01,538 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 12:49:01,538 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 12:49:01,538 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 12:49:01,538 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 12:49:01,539 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 12:49:01,539 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 12:49:01,539 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 12:49:01,539 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 12:49:01,539 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 12:49:01,539 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 12:49:01,539 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 12:49:01,539 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 12:49:01,540 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 12:49:01,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 12:49:01,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 12:49:01,541 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 12:49:01,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 12:49:01,541 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 12:49:01,541 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 12:49:01,672 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 12:49:01,675 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 12:49:02,210 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 12:49:02,344 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 12:49:02,344 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-01 12:49:02,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:49:02 BoogieIcfgContainer [2023-04-01 12:49:02,347 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 12:49:02,350 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 12:49:02,350 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 12:49:02,352 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 12:49:02,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:49:01" (1/3) ... [2023-04-01 12:49:02,353 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12fefb86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:49:02, skipping insertion in model container [2023-04-01 12:49:02,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:49:01" (2/3) ... [2023-04-01 12:49:02,353 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12fefb86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:49:02, skipping insertion in model container [2023-04-01 12:49:02,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:49:02" (3/3) ... [2023-04-01 12:49:02,354 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2023-04-01 12:49:02,366 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 12:49:02,367 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 12:49:02,409 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 12:49:02,413 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;@7fb424db, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 12:49:02,413 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 12:49:02,417 INFO L276 IsEmpty]: Start isEmpty. Operand has 104 states, 92 states have (on average 1.75) internal successors, (161), 99 states have internal predecessors, (161), 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 12:49:02,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-01 12:49:02,423 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:49:02,423 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:49:02,424 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:49:02,428 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:49:02,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1123297904, now seen corresponding path program 1 times [2023-04-01 12:49:02,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:49:02,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20659297] [2023-04-01 12:49:02,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:49:02,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:49:02,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:49:02,776 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 12:49:02,776 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:49:02,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20659297] [2023-04-01 12:49:02,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20659297] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:49:02,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:49:02,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:49:02,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587526905] [2023-04-01 12:49:02,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:49:02,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:49:02,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:49:02,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:49:02,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:49:02,811 INFO L87 Difference]: Start difference. First operand has 104 states, 92 states have (on average 1.75) internal successors, (161), 99 states have internal predecessors, (161), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:49:02,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:49:02,907 INFO L93 Difference]: Finished difference Result 238 states and 362 transitions. [2023-04-01 12:49:02,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:49:02,909 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2023-04-01 12:49:02,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:49:02,919 INFO L225 Difference]: With dead ends: 238 [2023-04-01 12:49:02,919 INFO L226 Difference]: Without dead ends: 144 [2023-04-01 12:49:02,921 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 12:49:02,925 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 114 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:49:02,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 354 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:49:02,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2023-04-01 12:49:02,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 142. [2023-04-01 12:49:02,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 138 states have (on average 1.4492753623188406) internal successors, (200), 138 states have internal predecessors, (200), 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 12:49:02,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 203 transitions. [2023-04-01 12:49:02,988 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 203 transitions. Word has length 41 [2023-04-01 12:49:02,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:49:02,989 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 203 transitions. [2023-04-01 12:49:02,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:49:02,989 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 203 transitions. [2023-04-01 12:49:02,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-01 12:49:02,990 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:49:02,990 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] [2023-04-01 12:49:02,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 12:49:02,990 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:49:02,991 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:49:02,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1242820574, now seen corresponding path program 1 times [2023-04-01 12:49:02,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:49:02,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725571881] [2023-04-01 12:49:02,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:49:02,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:49:03,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:49:03,143 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 12:49:03,144 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:49:03,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725571881] [2023-04-01 12:49:03,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725571881] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:49:03,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:49:03,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:49:03,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043622479] [2023-04-01 12:49:03,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:49:03,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:49:03,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:49:03,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:49:03,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:49:03,151 INFO L87 Difference]: Start difference. First operand 142 states and 203 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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 12:49:03,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:49:03,205 INFO L93 Difference]: Finished difference Result 319 states and 476 transitions. [2023-04-01 12:49:03,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:49:03,209 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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 43 [2023-04-01 12:49:03,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:49:03,214 INFO L225 Difference]: With dead ends: 319 [2023-04-01 12:49:03,215 INFO L226 Difference]: Without dead ends: 207 [2023-04-01 12:49:03,218 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 12:49:03,221 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 93 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:49:03,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 213 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:49:03,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2023-04-01 12:49:03,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 205. [2023-04-01 12:49:03,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 201 states have (on average 1.4676616915422886) internal successors, (295), 201 states have internal predecessors, (295), 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 12:49:03,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 298 transitions. [2023-04-01 12:49:03,235 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 298 transitions. Word has length 43 [2023-04-01 12:49:03,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:49:03,235 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 298 transitions. [2023-04-01 12:49:03,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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 12:49:03,235 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 298 transitions. [2023-04-01 12:49:03,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-01 12:49:03,236 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:49:03,253 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 12:49:03,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 12:49:03,253 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:49:03,253 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:49:03,254 INFO L85 PathProgramCache]: Analyzing trace with hash -930158237, now seen corresponding path program 1 times [2023-04-01 12:49:03,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:49:03,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366676414] [2023-04-01 12:49:03,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:49:03,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:49:03,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:49:03,362 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 12:49:03,362 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:49:03,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366676414] [2023-04-01 12:49:03,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366676414] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:49:03,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:49:03,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:49:03,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373613284] [2023-04-01 12:49:03,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:49:03,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:49:03,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:49:03,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:49:03,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:49:03,365 INFO L87 Difference]: Start difference. First operand 205 states and 298 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 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 12:49:03,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:49:03,415 INFO L93 Difference]: Finished difference Result 509 states and 761 transitions. [2023-04-01 12:49:03,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:49:03,416 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 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 12:49:03,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:49:03,417 INFO L225 Difference]: With dead ends: 509 [2023-04-01 12:49:03,418 INFO L226 Difference]: Without dead ends: 336 [2023-04-01 12:49:03,422 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 12:49:03,424 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 92 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:49:03,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 257 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:49:03,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2023-04-01 12:49:03,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 334. [2023-04-01 12:49:03,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 330 states have (on average 1.4787878787878788) internal successors, (488), 330 states have internal predecessors, (488), 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 12:49:03,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 491 transitions. [2023-04-01 12:49:03,460 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 491 transitions. Word has length 45 [2023-04-01 12:49:03,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:49:03,460 INFO L495 AbstractCegarLoop]: Abstraction has 334 states and 491 transitions. [2023-04-01 12:49:03,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 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 12:49:03,460 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 491 transitions. [2023-04-01 12:49:03,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-01 12:49:03,463 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:49:03,463 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:49:03,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 12:49:03,463 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:49:03,463 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:49:03,464 INFO L85 PathProgramCache]: Analyzing trace with hash -2062345941, now seen corresponding path program 1 times [2023-04-01 12:49:03,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:49:03,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238858875] [2023-04-01 12:49:03,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:49:03,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:49:03,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:49:03,569 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 12:49:03,569 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:49:03,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238858875] [2023-04-01 12:49:03,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238858875] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:49:03,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:49:03,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:49:03,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493515706] [2023-04-01 12:49:03,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:49:03,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:49:03,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:49:03,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:49:03,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:49:03,570 INFO L87 Difference]: Start difference. First operand 334 states and 491 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:49:03,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:49:03,621 INFO L93 Difference]: Finished difference Result 825 states and 1240 transitions. [2023-04-01 12:49:03,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:49:03,622 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2023-04-01 12:49:03,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:49:03,625 INFO L225 Difference]: With dead ends: 825 [2023-04-01 12:49:03,625 INFO L226 Difference]: Without dead ends: 523 [2023-04-01 12:49:03,626 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 12:49:03,630 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 91 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:49:03,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 230 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:49:03,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2023-04-01 12:49:03,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 521. [2023-04-01 12:49:03,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 517 states have (on average 1.4970986460348163) internal successors, (774), 517 states have internal predecessors, (774), 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 12:49:03,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 777 transitions. [2023-04-01 12:49:03,658 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 777 transitions. Word has length 47 [2023-04-01 12:49:03,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:49:03,658 INFO L495 AbstractCegarLoop]: Abstraction has 521 states and 777 transitions. [2023-04-01 12:49:03,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:49:03,659 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 777 transitions. [2023-04-01 12:49:03,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-04-01 12:49:03,659 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:49:03,659 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:49:03,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 12:49:03,660 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:49:03,660 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:49:03,660 INFO L85 PathProgramCache]: Analyzing trace with hash -2143138196, now seen corresponding path program 1 times [2023-04-01 12:49:03,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:49:03,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799617837] [2023-04-01 12:49:03,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:49:03,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:49:03,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:49:03,713 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 12:49:03,713 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:49:03,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799617837] [2023-04-01 12:49:03,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799617837] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:49:03,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:49:03,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:49:03,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479592464] [2023-04-01 12:49:03,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:49:03,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:49:03,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:49:03,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:49:03,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:49:03,715 INFO L87 Difference]: Start difference. First operand 521 states and 777 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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 12:49:03,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:49:03,810 INFO L93 Difference]: Finished difference Result 1341 states and 2012 transitions. [2023-04-01 12:49:03,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:49:03,812 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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 49 [2023-04-01 12:49:03,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:49:03,814 INFO L225 Difference]: With dead ends: 1341 [2023-04-01 12:49:03,814 INFO L226 Difference]: Without dead ends: 868 [2023-04-01 12:49:03,815 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 12:49:03,815 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 86 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:49:03,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 233 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:49:03,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2023-04-01 12:49:03,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 866. [2023-04-01 12:49:03,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 862 states have (on average 1.482598607888631) internal successors, (1278), 862 states have internal predecessors, (1278), 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 12:49:03,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 1281 transitions. [2023-04-01 12:49:03,874 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 1281 transitions. Word has length 49 [2023-04-01 12:49:03,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:49:03,875 INFO L495 AbstractCegarLoop]: Abstraction has 866 states and 1281 transitions. [2023-04-01 12:49:03,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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 12:49:03,875 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 1281 transitions. [2023-04-01 12:49:03,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-01 12:49:03,877 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:49:03,877 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:49:03,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 12:49:03,877 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:49:03,878 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:49:03,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1062393481, now seen corresponding path program 1 times [2023-04-01 12:49:03,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:49:03,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831534900] [2023-04-01 12:49:03,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:49:03,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:49:03,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:49:03,962 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 12:49:03,962 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:49:03,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831534900] [2023-04-01 12:49:03,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831534900] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:49:03,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:49:03,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:49:03,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053618047] [2023-04-01 12:49:03,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:49:03,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:49:03,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:49:03,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:49:03,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:49:03,964 INFO L87 Difference]: Start difference. First operand 866 states and 1281 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 12:49:04,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:49:04,061 INFO L93 Difference]: Finished difference Result 2173 states and 3251 transitions. [2023-04-01 12:49:04,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:49:04,062 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 51 [2023-04-01 12:49:04,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:49:04,066 INFO L225 Difference]: With dead ends: 2173 [2023-04-01 12:49:04,066 INFO L226 Difference]: Without dead ends: 1355 [2023-04-01 12:49:04,067 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 12:49:04,069 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 85 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:49:04,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 232 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:49:04,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2023-04-01 12:49:04,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 1353. [2023-04-01 12:49:04,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1353 states, 1349 states have (on average 1.4922164566345442) internal successors, (2013), 1349 states have internal predecessors, (2013), 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 12:49:04,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1353 states to 1353 states and 2016 transitions. [2023-04-01 12:49:04,189 INFO L78 Accepts]: Start accepts. Automaton has 1353 states and 2016 transitions. Word has length 51 [2023-04-01 12:49:04,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:49:04,189 INFO L495 AbstractCegarLoop]: Abstraction has 1353 states and 2016 transitions. [2023-04-01 12:49:04,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 12:49:04,189 INFO L276 IsEmpty]: Start isEmpty. Operand 1353 states and 2016 transitions. [2023-04-01 12:49:04,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-01 12:49:04,190 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:49:04,190 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:49:04,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 12:49:04,190 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:49:04,191 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:49:04,191 INFO L85 PathProgramCache]: Analyzing trace with hash 432633674, now seen corresponding path program 1 times [2023-04-01 12:49:04,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:49:04,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904826491] [2023-04-01 12:49:04,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:49:04,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:49:04,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:49:04,283 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 12:49:04,284 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:49:04,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904826491] [2023-04-01 12:49:04,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904826491] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:49:04,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:49:04,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:49:04,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001365799] [2023-04-01 12:49:04,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:49:04,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:49:04,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:49:04,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:49:04,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:49:04,286 INFO L87 Difference]: Start difference. First operand 1353 states and 2016 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:49:04,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:49:04,520 INFO L93 Difference]: Finished difference Result 3441 states and 5160 transitions. [2023-04-01 12:49:04,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 12:49:04,521 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2023-04-01 12:49:04,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:49:04,528 INFO L225 Difference]: With dead ends: 3441 [2023-04-01 12:49:04,529 INFO L226 Difference]: Without dead ends: 2134 [2023-04-01 12:49:04,531 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 12:49:04,531 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 525 mSDsluCounter, 806 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 936 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:49:04,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [525 Valid, 936 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:49:04,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2134 states. [2023-04-01 12:49:04,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2134 to 2108. [2023-04-01 12:49:04,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2108 states, 2104 states have (on average 1.5) internal successors, (3156), 2104 states have internal predecessors, (3156), 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 12:49:04,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2108 states to 2108 states and 3159 transitions. [2023-04-01 12:49:04,685 INFO L78 Accepts]: Start accepts. Automaton has 2108 states and 3159 transitions. Word has length 53 [2023-04-01 12:49:04,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:49:04,686 INFO L495 AbstractCegarLoop]: Abstraction has 2108 states and 3159 transitions. [2023-04-01 12:49:04,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:49:04,686 INFO L276 IsEmpty]: Start isEmpty. Operand 2108 states and 3159 transitions. [2023-04-01 12:49:04,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-01 12:49:04,687 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:49:04,687 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:49:04,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 12:49:04,687 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:49:04,687 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:49:04,687 INFO L85 PathProgramCache]: Analyzing trace with hash 465131540, now seen corresponding path program 1 times [2023-04-01 12:49:04,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:49:04,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075531749] [2023-04-01 12:49:04,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:49:04,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:49:04,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:49:04,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:49:04,756 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:49:04,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075531749] [2023-04-01 12:49:04,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075531749] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:49:04,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:49:04,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 12:49:04,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627562153] [2023-04-01 12:49:04,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:49:04,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 12:49:04,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:49:04,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 12:49:04,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 12:49:04,758 INFO L87 Difference]: Start difference. First operand 2108 states and 3159 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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 12:49:04,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:49:04,932 INFO L93 Difference]: Finished difference Result 4154 states and 6239 transitions. [2023-04-01 12:49:04,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 12:49:04,932 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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 54 [2023-04-01 12:49:04,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:49:04,938 INFO L225 Difference]: With dead ends: 4154 [2023-04-01 12:49:04,938 INFO L226 Difference]: Without dead ends: 2110 [2023-04-01 12:49:04,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:49:04,941 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 174 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:49:04,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 329 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:49:04,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2110 states. [2023-04-01 12:49:05,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2110 to 2105. [2023-04-01 12:49:05,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2105 states, 2101 states have (on average 1.4950023798191336) internal successors, (3141), 2101 states have internal predecessors, (3141), 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 12:49:05,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2105 states to 2105 states and 3144 transitions. [2023-04-01 12:49:05,052 INFO L78 Accepts]: Start accepts. Automaton has 2105 states and 3144 transitions. Word has length 54 [2023-04-01 12:49:05,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:49:05,052 INFO L495 AbstractCegarLoop]: Abstraction has 2105 states and 3144 transitions. [2023-04-01 12:49:05,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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 12:49:05,052 INFO L276 IsEmpty]: Start isEmpty. Operand 2105 states and 3144 transitions. [2023-04-01 12:49:05,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-04-01 12:49:05,053 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:49:05,053 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:49:05,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 12:49:05,053 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:49:05,053 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:49:05,053 INFO L85 PathProgramCache]: Analyzing trace with hash 2099880, now seen corresponding path program 1 times [2023-04-01 12:49:05,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:49:05,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202506886] [2023-04-01 12:49:05,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:49:05,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:49:05,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:49:05,300 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 12:49:05,300 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:49:05,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202506886] [2023-04-01 12:49:05,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202506886] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:49:05,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:49:05,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:49:05,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356470136] [2023-04-01 12:49:05,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:49:05,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:49:05,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:49:05,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:49:05,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:49:05,302 INFO L87 Difference]: Start difference. First operand 2105 states and 3144 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 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 12:49:05,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:49:05,536 INFO L93 Difference]: Finished difference Result 3438 states and 5080 transitions. [2023-04-01 12:49:05,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 12:49:05,537 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 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 62 [2023-04-01 12:49:05,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:49:05,548 INFO L225 Difference]: With dead ends: 3438 [2023-04-01 12:49:05,548 INFO L226 Difference]: Without dead ends: 3436 [2023-04-01 12:49:05,549 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 12:49:05,550 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 176 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:49:05,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 660 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:49:05,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3436 states. [2023-04-01 12:49:05,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3436 to 2149. [2023-04-01 12:49:05,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2149 states, 2145 states have (on average 1.474125874125874) internal successors, (3162), 2145 states have internal predecessors, (3162), 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 12:49:05,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2149 states to 2149 states and 3165 transitions. [2023-04-01 12:49:05,772 INFO L78 Accepts]: Start accepts. Automaton has 2149 states and 3165 transitions. Word has length 62 [2023-04-01 12:49:05,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:49:05,772 INFO L495 AbstractCegarLoop]: Abstraction has 2149 states and 3165 transitions. [2023-04-01 12:49:05,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 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 12:49:05,772 INFO L276 IsEmpty]: Start isEmpty. Operand 2149 states and 3165 transitions. [2023-04-01 12:49:05,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-04-01 12:49:05,773 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:49:05,773 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:49:05,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 12:49:05,773 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:49:05,774 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:49:05,774 INFO L85 PathProgramCache]: Analyzing trace with hash 55271789, now seen corresponding path program 1 times [2023-04-01 12:49:05,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:49:05,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192018204] [2023-04-01 12:49:05,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:49:05,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:49:05,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:49:06,776 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 12:49:06,776 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:49:06,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192018204] [2023-04-01 12:49:06,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192018204] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:49:06,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847871165] [2023-04-01 12:49:06,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:49:06,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:49:06,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:49:06,795 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 12:49:06,799 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 12:49:06,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:49:06,985 INFO L262 TraceCheckSpWp]: Trace formula consists of 852 conjuncts, 28 conjunts are in the unsatisfiable core [2023-04-01 12:49:06,993 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:49:07,557 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 12:49:07,557 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 12:49:09,856 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 12:49:09,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847871165] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 12:49:09,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1285271887] [2023-04-01 12:49:09,898 INFO L159 IcfgInterpreter]: Started Sifa with 63 locations of interest [2023-04-01 12:49:09,898 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 12:49:09,901 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 12:49:09,904 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 12:49:09,904 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 12:49:11,872 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 240 for LOIs [2023-04-01 12:49:12,600 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2023-04-01 12:49:24,124 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 262144 conjuctions. This might take some time...