/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.3.ufo.BOUNDED-8.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 06:14:50,616 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 06:14:50,617 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 06:14:50,634 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 06:14:50,634 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 06:14:50,635 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 06:14:50,636 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 06:14:50,637 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 06:14:50,638 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 06:14:50,638 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 06:14:50,639 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 06:14:50,639 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 06:14:50,640 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 06:14:50,640 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 06:14:50,641 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 06:14:50,641 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 06:14:50,642 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 06:14:50,642 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 06:14:50,643 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 06:14:50,644 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 06:14:50,645 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 06:14:50,646 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 06:14:50,647 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 06:14:50,647 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 06:14:50,649 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 06:14:50,649 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 06:14:50,650 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 06:14:50,650 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 06:14:50,650 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 06:14:50,651 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 06:14:50,651 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 06:14:50,652 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 06:14:50,652 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 06:14:50,653 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 06:14:50,653 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 06:14:50,653 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 06:14:50,654 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 06:14:50,654 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 06:14:50,654 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 06:14:50,655 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 06:14:50,655 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 06:14:50,656 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 06:14:50,669 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 06:14:50,669 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 06:14:50,669 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 06:14:50,669 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 06:14:50,670 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 06:14:50,670 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 06:14:50,670 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 06:14:50,670 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 06:14:50,670 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 06:14:50,670 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 06:14:50,670 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 06:14:50,670 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 06:14:50,670 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 06:14:50,670 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 06:14:50,670 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 06:14:50,671 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 06:14:50,671 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 06:14:50,671 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 06:14:50,671 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 06:14:50,671 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 06:14:50,671 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 06:14:50,671 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 06:14:50,671 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 06:14:50,671 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 06:14:50,672 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 06:14:50,672 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 06:14:50,672 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 06:14:50,672 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 06:14:50,672 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 06:14:50,672 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 06:14:50,672 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 06:14:50,672 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 06:14:50,672 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:14:50,672 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 06:14:50,672 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 06:14:50,673 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 06:14:50,673 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 06:14:50,673 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 06:14:50,673 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 06:14:50,673 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 06:14:50,673 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 06:14:50,673 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 06:14:50,799 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 06:14:50,812 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 06:14:50,813 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 06:14:50,814 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 06:14:50,814 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 06:14:50,815 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.3.ufo.BOUNDED-8.pals.c [2023-04-01 06:14:51,753 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 06:14:51,931 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 06:14:51,932 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.3.ufo.BOUNDED-8.pals.c [2023-04-01 06:14:51,940 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/800f0cb76/af769bfd83714ba8b67f1e551e16a922/FLAG3421abb69 [2023-04-01 06:14:51,949 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/800f0cb76/af769bfd83714ba8b67f1e551e16a922 [2023-04-01 06:14:51,951 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 06:14:51,952 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 06:14:51,953 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 06:14:51,953 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 06:14:51,955 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 06:14:51,955 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:14:51" (1/1) ... [2023-04-01 06:14:51,957 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c63c4de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:14:51, skipping insertion in model container [2023-04-01 06:14:51,957 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:14:51" (1/1) ... [2023-04-01 06:14:51,961 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 06:14:51,998 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 06:14:52,201 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/pals_floodmax.4.3.ufo.BOUNDED-8.pals.c[28194,28207] [2023-04-01 06:14:52,204 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:14:52,222 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 06:14:52,283 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/pals_floodmax.4.3.ufo.BOUNDED-8.pals.c[28194,28207] [2023-04-01 06:14:52,284 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:14:52,299 INFO L208 MainTranslator]: Completed translation [2023-04-01 06:14:52,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:14:52 WrapperNode [2023-04-01 06:14:52,300 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 06:14:52,301 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 06:14:52,301 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 06:14:52,301 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 06:14:52,311 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:14:52" (1/1) ... [2023-04-01 06:14:52,311 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:14:52" (1/1) ... [2023-04-01 06:14:52,324 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:14:52" (1/1) ... [2023-04-01 06:14:52,325 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:14:52" (1/1) ... [2023-04-01 06:14:52,344 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:14:52" (1/1) ... [2023-04-01 06:14:52,365 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:14:52" (1/1) ... [2023-04-01 06:14:52,368 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:14:52" (1/1) ... [2023-04-01 06:14:52,371 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:14:52" (1/1) ... [2023-04-01 06:14:52,375 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 06:14:52,375 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 06:14:52,375 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 06:14:52,376 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 06:14:52,376 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:14:52" (1/1) ... [2023-04-01 06:14:52,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:14:52,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:14:52,434 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 06:14:52,437 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 06:14:52,467 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 06:14:52,468 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 06:14:52,468 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 06:14:52,469 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 06:14:52,469 INFO L138 BoogieDeclarations]: Found implementation of procedure node1 [2023-04-01 06:14:52,469 INFO L138 BoogieDeclarations]: Found implementation of procedure node2 [2023-04-01 06:14:52,469 INFO L138 BoogieDeclarations]: Found implementation of procedure node3 [2023-04-01 06:14:52,469 INFO L138 BoogieDeclarations]: Found implementation of procedure node4 [2023-04-01 06:14:52,469 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2023-04-01 06:14:52,470 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2023-04-01 06:14:52,470 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 06:14:52,470 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2023-04-01 06:14:52,470 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 06:14:52,470 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 06:14:52,470 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 06:14:52,470 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 06:14:52,470 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 06:14:52,470 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 06:14:52,470 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 06:14:52,471 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 06:14:52,471 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 06:14:52,471 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 06:14:52,471 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 06:14:52,471 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 06:14:52,471 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 06:14:52,471 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-01 06:14:52,471 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 06:14:52,471 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 06:14:52,471 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 06:14:52,471 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 06:14:52,471 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 06:14:52,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 06:14:52,472 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 06:14:52,472 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 06:14:52,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 06:14:52,622 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 06:14:52,623 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 06:14:53,312 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 06:14:53,781 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 06:14:53,781 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 06:14:53,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:14:53 BoogieIcfgContainer [2023-04-01 06:14:53,785 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 06:14:53,787 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 06:14:53,787 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 06:14:53,789 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 06:14:53,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 06:14:51" (1/3) ... [2023-04-01 06:14:53,790 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61a1af50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:14:53, skipping insertion in model container [2023-04-01 06:14:53,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:14:52" (2/3) ... [2023-04-01 06:14:53,790 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61a1af50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:14:53, skipping insertion in model container [2023-04-01 06:14:53,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:14:53" (3/3) ... [2023-04-01 06:14:53,793 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.3.ufo.BOUNDED-8.pals.c [2023-04-01 06:14:53,806 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 06:14:53,806 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 06:14:53,856 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 06:14:53,864 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;@72e72e20, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 06:14:53,864 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 06:14:53,872 INFO L276 IsEmpty]: Start isEmpty. Operand has 175 states, 153 states have (on average 1.5620915032679739) internal successors, (239), 154 states have internal predecessors, (239), 10 states have call successors, (10), 10 states have call predecessors, (10), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-01 06:14:53,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-04-01 06:14:53,887 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:14:53,889 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:14:53,890 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:14:53,896 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:14:53,897 INFO L85 PathProgramCache]: Analyzing trace with hash 2104542807, now seen corresponding path program 1 times [2023-04-01 06:14:53,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:14:53,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427649730] [2023-04-01 06:14:53,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:14:53,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:14:54,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:14:58,851 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 06:14:58,852 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:14:58,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427649730] [2023-04-01 06:14:58,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427649730] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:14:58,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:14:58,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-04-01 06:14:58,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210048400] [2023-04-01 06:14:58,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:14:58,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-01 06:14:58,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:14:58,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-01 06:14:58,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2023-04-01 06:14:58,898 INFO L87 Difference]: Start difference. First operand has 175 states, 153 states have (on average 1.5620915032679739) internal successors, (239), 154 states have internal predecessors, (239), 10 states have call successors, (10), 10 states have call predecessors, (10), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 20 states, 10 states have (on average 6.7) internal successors, (67), 12 states have internal predecessors, (67), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-01 06:15:00,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:15:00,867 INFO L93 Difference]: Finished difference Result 282 states and 398 transitions. [2023-04-01 06:15:00,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-04-01 06:15:00,869 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 10 states have (on average 6.7) internal successors, (67), 12 states have internal predecessors, (67), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 85 [2023-04-01 06:15:00,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:15:00,876 INFO L225 Difference]: With dead ends: 282 [2023-04-01 06:15:00,876 INFO L226 Difference]: Without dead ends: 228 [2023-04-01 06:15:00,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=304, Invalid=956, Unknown=0, NotChecked=0, Total=1260 [2023-04-01 06:15:00,881 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1937 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2136 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1940 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 2308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 2136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-01 06:15:00,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1940 Valid, 165 Invalid, 2308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 2136 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-01 06:15:00,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2023-04-01 06:15:00,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 202. [2023-04-01 06:15:00,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 172 states have (on average 1.5465116279069768) internal successors, (266), 173 states have internal predecessors, (266), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2023-04-01 06:15:00,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 296 transitions. [2023-04-01 06:15:00,928 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 296 transitions. Word has length 85 [2023-04-01 06:15:00,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:15:00,929 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 296 transitions. [2023-04-01 06:15:00,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 10 states have (on average 6.7) internal successors, (67), 12 states have internal predecessors, (67), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-01 06:15:00,929 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 296 transitions. [2023-04-01 06:15:00,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-01 06:15:00,931 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:15:00,931 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:15:00,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 06:15:00,932 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:15:00,932 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:15:00,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1205989878, now seen corresponding path program 1 times [2023-04-01 06:15:00,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:15:00,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70731485] [2023-04-01 06:15:00,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:15:00,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:15:00,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:15:02,839 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 06:15:02,839 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:15:02,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70731485] [2023-04-01 06:15:02,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70731485] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:15:02,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:15:02,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 06:15:02,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307610634] [2023-04-01 06:15:02,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:15:02,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 06:15:02,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:15:02,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 06:15:02,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-01 06:15:02,842 INFO L87 Difference]: Start difference. First operand 202 states and 296 transitions. Second operand has 11 states, 7 states have (on average 9.714285714285714) internal successors, (68), 9 states have internal predecessors, (68), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 06:15:03,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:15:03,774 INFO L93 Difference]: Finished difference Result 281 states and 396 transitions. [2023-04-01 06:15:03,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 06:15:03,775 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 9.714285714285714) internal successors, (68), 9 states have internal predecessors, (68), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 86 [2023-04-01 06:15:03,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:15:03,781 INFO L225 Difference]: With dead ends: 281 [2023-04-01 06:15:03,782 INFO L226 Difference]: Without dead ends: 235 [2023-04-01 06:15:03,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-01 06:15:03,788 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 311 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1795 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 1819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 06:15:03,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 106 Invalid, 1819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1795 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 06:15:03,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2023-04-01 06:15:03,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 202. [2023-04-01 06:15:03,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 172 states have (on average 1.5406976744186047) internal successors, (265), 173 states have internal predecessors, (265), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-01 06:15:03,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 294 transitions. [2023-04-01 06:15:03,827 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 294 transitions. Word has length 86 [2023-04-01 06:15:03,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:15:03,829 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 294 transitions. [2023-04-01 06:15:03,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 9.714285714285714) internal successors, (68), 9 states have internal predecessors, (68), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 06:15:03,829 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 294 transitions. [2023-04-01 06:15:03,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-04-01 06:15:03,835 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:15:03,836 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:15:03,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 06:15:03,836 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:15:03,836 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:15:03,837 INFO L85 PathProgramCache]: Analyzing trace with hash 227364256, now seen corresponding path program 1 times [2023-04-01 06:15:03,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:15:03,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477557601] [2023-04-01 06:15:03,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:15:03,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:15:03,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:15:05,718 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 06:15:05,718 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:15:05,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477557601] [2023-04-01 06:15:05,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477557601] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:15:05,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:15:05,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 06:15:05,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408859339] [2023-04-01 06:15:05,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:15:05,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 06:15:05,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:15:05,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 06:15:05,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-01 06:15:05,721 INFO L87 Difference]: Start difference. First operand 202 states and 294 transitions. Second operand has 11 states, 7 states have (on average 9.857142857142858) internal successors, (69), 9 states have internal predecessors, (69), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 06:15:06,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:15:06,657 INFO L93 Difference]: Finished difference Result 275 states and 380 transitions. [2023-04-01 06:15:06,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 06:15:06,657 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 9.857142857142858) internal successors, (69), 9 states have internal predecessors, (69), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 87 [2023-04-01 06:15:06,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:15:06,659 INFO L225 Difference]: With dead ends: 275 [2023-04-01 06:15:06,659 INFO L226 Difference]: Without dead ends: 234 [2023-04-01 06:15:06,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-01 06:15:06,664 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 575 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1796 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 580 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 1849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 06:15:06,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [580 Valid, 100 Invalid, 1849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1796 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 06:15:06,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2023-04-01 06:15:06,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 202. [2023-04-01 06:15:06,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 172 states have (on average 1.5348837209302326) internal successors, (264), 173 states have internal predecessors, (264), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-01 06:15:06,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 293 transitions. [2023-04-01 06:15:06,692 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 293 transitions. Word has length 87 [2023-04-01 06:15:06,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:15:06,694 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 293 transitions. [2023-04-01 06:15:06,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 9.857142857142858) internal successors, (69), 9 states have internal predecessors, (69), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 06:15:06,694 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 293 transitions. [2023-04-01 06:15:06,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-04-01 06:15:06,696 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:15:06,696 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:15:06,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 06:15:06,697 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:15:06,697 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:15:06,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1061452447, now seen corresponding path program 1 times [2023-04-01 06:15:06,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:15:06,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401785660] [2023-04-01 06:15:06,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:15:06,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:15:06,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:15:08,493 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 06:15:08,494 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:15:08,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401785660] [2023-04-01 06:15:08,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401785660] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:15:08,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:15:08,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 06:15:08,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862188183] [2023-04-01 06:15:08,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:15:08,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 06:15:08,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:15:08,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 06:15:08,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-01 06:15:08,495 INFO L87 Difference]: Start difference. First operand 202 states and 293 transitions. Second operand has 11 states, 7 states have (on average 10.0) internal successors, (70), 9 states have internal predecessors, (70), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 06:15:09,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:15:09,482 INFO L93 Difference]: Finished difference Result 281 states and 385 transitions. [2023-04-01 06:15:09,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 06:15:09,483 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 10.0) internal successors, (70), 9 states have internal predecessors, (70), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 88 [2023-04-01 06:15:09,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:15:09,484 INFO L225 Difference]: With dead ends: 281 [2023-04-01 06:15:09,484 INFO L226 Difference]: Without dead ends: 240 [2023-04-01 06:15:09,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-01 06:15:09,485 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 577 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 1814 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 584 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 1860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-01 06:15:09,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [584 Valid, 102 Invalid, 1860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1814 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-01 06:15:09,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2023-04-01 06:15:09,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 202. [2023-04-01 06:15:09,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 172 states have (on average 1.5290697674418605) internal successors, (263), 173 states have internal predecessors, (263), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-01 06:15:09,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 292 transitions. [2023-04-01 06:15:09,503 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 292 transitions. Word has length 88 [2023-04-01 06:15:09,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:15:09,503 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 292 transitions. [2023-04-01 06:15:09,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 10.0) internal successors, (70), 9 states have internal predecessors, (70), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 06:15:09,503 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 292 transitions. [2023-04-01 06:15:09,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-04-01 06:15:09,504 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:15:09,504 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:15:09,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 06:15:09,504 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:15:09,504 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:15:09,505 INFO L85 PathProgramCache]: Analyzing trace with hash -2039873303, now seen corresponding path program 1 times [2023-04-01 06:15:09,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:15:09,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450538748] [2023-04-01 06:15:09,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:15:09,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:15:09,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:15:11,046 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 06:15:11,046 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:15:11,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450538748] [2023-04-01 06:15:11,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450538748] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:15:11,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:15:11,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 06:15:11,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719654221] [2023-04-01 06:15:11,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:15:11,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 06:15:11,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:15:11,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 06:15:11,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-01 06:15:11,048 INFO L87 Difference]: Start difference. First operand 202 states and 292 transitions. Second operand has 11 states, 7 states have (on average 10.142857142857142) internal successors, (71), 9 states have internal predecessors, (71), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 06:15:11,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:15:11,935 INFO L93 Difference]: Finished difference Result 287 states and 390 transitions. [2023-04-01 06:15:11,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 06:15:11,935 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 10.142857142857142) internal successors, (71), 9 states have internal predecessors, (71), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 89 [2023-04-01 06:15:11,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:15:11,937 INFO L225 Difference]: With dead ends: 287 [2023-04-01 06:15:11,937 INFO L226 Difference]: Without dead ends: 246 [2023-04-01 06:15:11,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-01 06:15:11,938 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 581 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1831 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 590 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 1880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 06:15:11,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [590 Valid, 104 Invalid, 1880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1831 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 06:15:11,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2023-04-01 06:15:11,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 202. [2023-04-01 06:15:11,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 172 states have (on average 1.5232558139534884) internal successors, (262), 173 states have internal predecessors, (262), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-01 06:15:11,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 291 transitions. [2023-04-01 06:15:11,956 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 291 transitions. Word has length 89 [2023-04-01 06:15:11,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:15:11,956 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 291 transitions. [2023-04-01 06:15:11,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 10.142857142857142) internal successors, (71), 9 states have internal predecessors, (71), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 06:15:11,957 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 291 transitions. [2023-04-01 06:15:11,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-04-01 06:15:11,957 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:15:11,957 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:15:11,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 06:15:11,958 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:15:11,958 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:15:11,958 INFO L85 PathProgramCache]: Analyzing trace with hash 416826577, now seen corresponding path program 1 times [2023-04-01 06:15:11,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:15:11,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292809741] [2023-04-01 06:15:11,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:15:11,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:15:12,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:15:14,713 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 06:15:14,714 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:15:14,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292809741] [2023-04-01 06:15:14,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292809741] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:15:14,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:15:14,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2023-04-01 06:15:14,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332515317] [2023-04-01 06:15:14,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:15:14,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-01 06:15:14,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:15:14,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-01 06:15:14,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2023-04-01 06:15:14,716 INFO L87 Difference]: Start difference. First operand 202 states and 291 transitions. Second operand has 21 states, 11 states have (on average 6.636363636363637) internal successors, (73), 13 states have internal predecessors, (73), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-01 06:15:16,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:15:16,592 INFO L93 Difference]: Finished difference Result 378 states and 508 transitions. [2023-04-01 06:15:16,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-04-01 06:15:16,593 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 11 states have (on average 6.636363636363637) internal successors, (73), 13 states have internal predecessors, (73), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 91 [2023-04-01 06:15:16,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:15:16,596 INFO L225 Difference]: With dead ends: 378 [2023-04-01 06:15:16,596 INFO L226 Difference]: Without dead ends: 334 [2023-04-01 06:15:16,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=435, Invalid=1457, Unknown=0, NotChecked=0, Total=1892 [2023-04-01 06:15:16,601 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 1695 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 2712 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1700 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 2863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 2712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-01 06:15:16,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1700 Valid, 262 Invalid, 2863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 2712 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-01 06:15:16,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2023-04-01 06:15:16,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 256. [2023-04-01 06:15:16,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 211 states have (on average 1.5023696682464456) internal successors, (317), 215 states have internal predecessors, (317), 21 states have call successors, (21), 21 states have call predecessors, (21), 23 states have return successors, (24), 19 states have call predecessors, (24), 20 states have call successors, (24) [2023-04-01 06:15:16,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 362 transitions. [2023-04-01 06:15:16,637 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 362 transitions. Word has length 91 [2023-04-01 06:15:16,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:15:16,637 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 362 transitions. [2023-04-01 06:15:16,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 11 states have (on average 6.636363636363637) internal successors, (73), 13 states have internal predecessors, (73), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-01 06:15:16,637 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 362 transitions. [2023-04-01 06:15:16,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-04-01 06:15:16,638 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:15:16,638 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:15:16,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 06:15:16,638 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:15:16,639 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:15:16,639 INFO L85 PathProgramCache]: Analyzing trace with hash -644118890, now seen corresponding path program 1 times [2023-04-01 06:15:16,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:15:16,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346078205] [2023-04-01 06:15:16,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:15:16,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:15:16,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:15:17,313 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 06:15:17,313 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:15:17,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346078205] [2023-04-01 06:15:17,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346078205] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:15:17,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:15:17,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 06:15:17,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047378398] [2023-04-01 06:15:17,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:15:17,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 06:15:17,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:15:17,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 06:15:17,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-04-01 06:15:17,315 INFO L87 Difference]: Start difference. First operand 256 states and 362 transitions. Second operand has 11 states, 7 states have (on average 10.571428571428571) internal successors, (74), 9 states have internal predecessors, (74), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 06:15:18,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:15:18,202 INFO L93 Difference]: Finished difference Result 335 states and 459 transitions. [2023-04-01 06:15:18,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 06:15:18,203 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 10.571428571428571) internal successors, (74), 9 states have internal predecessors, (74), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 92 [2023-04-01 06:15:18,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:15:18,204 INFO L225 Difference]: With dead ends: 335 [2023-04-01 06:15:18,204 INFO L226 Difference]: Without dead ends: 236 [2023-04-01 06:15:18,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-04-01 06:15:18,205 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 299 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 2049 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 2075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 2049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 06:15:18,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 114 Invalid, 2075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 2049 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 06:15:18,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2023-04-01 06:15:18,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 204. [2023-04-01 06:15:18,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 174 states have (on average 1.4885057471264367) internal successors, (259), 175 states have internal predecessors, (259), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-01 06:15:18,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 288 transitions. [2023-04-01 06:15:18,230 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 288 transitions. Word has length 92 [2023-04-01 06:15:18,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:15:18,230 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 288 transitions. [2023-04-01 06:15:18,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 10.571428571428571) internal successors, (74), 9 states have internal predecessors, (74), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 06:15:18,230 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 288 transitions. [2023-04-01 06:15:18,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-04-01 06:15:18,231 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:15:18,231 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:15:18,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 06:15:18,231 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:15:18,231 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:15:18,232 INFO L85 PathProgramCache]: Analyzing trace with hash 578347644, now seen corresponding path program 1 times [2023-04-01 06:15:18,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:15:18,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462579611] [2023-04-01 06:15:18,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:15:18,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:15:18,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:15:21,051 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 06:15:21,052 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:15:21,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462579611] [2023-04-01 06:15:21,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462579611] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:15:21,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:15:21,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-04-01 06:15:21,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086912894] [2023-04-01 06:15:21,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:15:21,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-01 06:15:21,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:15:21,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-01 06:15:21,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2023-04-01 06:15:21,054 INFO L87 Difference]: Start difference. First operand 204 states and 288 transitions. Second operand has 20 states, 10 states have (on average 7.6) internal successors, (76), 12 states have internal predecessors, (76), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-01 06:15:22,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:15:22,871 INFO L93 Difference]: Finished difference Result 277 states and 374 transitions. [2023-04-01 06:15:22,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-04-01 06:15:22,871 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 10 states have (on average 7.6) internal successors, (76), 12 states have internal predecessors, (76), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 94 [2023-04-01 06:15:22,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:15:22,873 INFO L225 Difference]: With dead ends: 277 [2023-04-01 06:15:22,873 INFO L226 Difference]: Without dead ends: 233 [2023-04-01 06:15:22,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=320, Invalid=1012, Unknown=0, NotChecked=0, Total=1332 [2023-04-01 06:15:22,874 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1284 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 2382 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1287 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 2489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 2382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-01 06:15:22,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1287 Valid, 168 Invalid, 2489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 2382 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-01 06:15:22,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2023-04-01 06:15:22,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 204. [2023-04-01 06:15:22,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 174 states have (on average 1.4827586206896552) internal successors, (258), 175 states have internal predecessors, (258), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-01 06:15:22,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 287 transitions. [2023-04-01 06:15:22,905 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 287 transitions. Word has length 94 [2023-04-01 06:15:22,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:15:22,905 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 287 transitions. [2023-04-01 06:15:22,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 10 states have (on average 7.6) internal successors, (76), 12 states have internal predecessors, (76), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-01 06:15:22,905 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 287 transitions. [2023-04-01 06:15:22,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-04-01 06:15:22,907 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:15:22,908 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:15:22,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 06:15:22,908 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:15:22,908 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:15:22,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1956576838, now seen corresponding path program 1 times [2023-04-01 06:15:22,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:15:22,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683330866] [2023-04-01 06:15:22,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:15:22,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:15:22,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:15:24,387 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 06:15:24,387 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:15:24,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683330866] [2023-04-01 06:15:24,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683330866] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:15:24,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:15:24,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-04-01 06:15:24,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732365537] [2023-04-01 06:15:24,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:15:24,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 06:15:24,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:15:24,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 06:15:24,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2023-04-01 06:15:24,389 INFO L87 Difference]: Start difference. First operand 204 states and 287 transitions. Second operand has 13 states, 8 states have (on average 9.625) internal successors, (77), 10 states have internal predecessors, (77), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-01 06:15:24,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:15:24,782 INFO L93 Difference]: Finished difference Result 282 states and 388 transitions. [2023-04-01 06:15:24,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-01 06:15:24,782 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 8 states have (on average 9.625) internal successors, (77), 10 states have internal predecessors, (77), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 95 [2023-04-01 06:15:24,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:15:24,784 INFO L225 Difference]: With dead ends: 282 [2023-04-01 06:15:24,784 INFO L226 Difference]: Without dead ends: 240 [2023-04-01 06:15:24,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2023-04-01 06:15:24,785 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 40 mSDsluCounter, 2466 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 2696 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 06:15:24,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 2696 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 06:15:24,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2023-04-01 06:15:24,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 212. [2023-04-01 06:15:24,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 179 states have (on average 1.458100558659218) internal successors, (261), 181 states have internal predecessors, (261), 16 states have call successors, (16), 16 states have call predecessors, (16), 16 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2023-04-01 06:15:24,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 293 transitions. [2023-04-01 06:15:24,833 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 293 transitions. Word has length 95 [2023-04-01 06:15:24,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:15:24,833 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 293 transitions. [2023-04-01 06:15:24,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 8 states have (on average 9.625) internal successors, (77), 10 states have internal predecessors, (77), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-01 06:15:24,834 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 293 transitions. [2023-04-01 06:15:24,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-04-01 06:15:24,835 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:15:24,835 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:15:24,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 06:15:24,835 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:15:24,835 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:15:24,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1979843270, now seen corresponding path program 1 times [2023-04-01 06:15:24,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:15:24,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779859314] [2023-04-01 06:15:24,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:15:24,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:15:24,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:15:30,045 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 06:15:30,045 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:15:30,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779859314] [2023-04-01 06:15:30,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779859314] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 06:15:30,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081914035] [2023-04-01 06:15:30,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:15:30,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:15:30,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:15:30,048 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 06:15:30,051 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 06:15:30,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:15:30,368 INFO L262 TraceCheckSpWp]: Trace formula consists of 1584 conjuncts, 98 conjunts are in the unsatisfiable core [2023-04-01 06:15:30,415 INFO L285 TraceCheckSpWp]: Computing forward predicates...