/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_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 02:01:46,232 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 02:01:46,234 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 02:01:46,270 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 02:01:46,271 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 02:01:46,272 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 02:01:46,273 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 02:01:46,275 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 02:01:46,276 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 02:01:46,277 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 02:01:46,278 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 02:01:46,279 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 02:01:46,279 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 02:01:46,280 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 02:01:46,281 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 02:01:46,281 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 02:01:46,282 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 02:01:46,283 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 02:01:46,284 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 02:01:46,286 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 02:01:46,287 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 02:01:46,288 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 02:01:46,289 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 02:01:46,289 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 02:01:46,292 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 02:01:46,293 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 02:01:46,293 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 02:01:46,294 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 02:01:46,294 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 02:01:46,295 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 02:01:46,295 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 02:01:46,296 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 02:01:46,296 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 02:01:46,297 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 02:01:46,298 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 02:01:46,298 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 02:01:46,299 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 02:01:46,299 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 02:01:46,299 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 02:01:46,300 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 02:01:46,305 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 02:01:46,308 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-03 02:01:46,347 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 02:01:46,348 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 02:01:46,348 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 02:01:46,348 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 02:01:46,349 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 02:01:46,349 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 02:01:46,349 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 02:01:46,349 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 02:01:46,350 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 02:01:46,350 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 02:01:46,350 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 02:01:46,351 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 02:01:46,351 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 02:01:46,351 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 02:01:46,351 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 02:01:46,351 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 02:01:46,351 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 02:01:46,351 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 02:01:46,352 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 02:01:46,352 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 02:01:46,352 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 02:01:46,352 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 02:01:46,353 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 02:01:46,353 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 02:01:46,353 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 02:01:46,353 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 02:01:46,353 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 02:01:46,353 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 02:01:46,354 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 02:01:46,354 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 02:01:46,354 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 02:01:46,354 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 02:01:46,354 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:01:46,355 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 02:01:46,355 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 02:01:46,355 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 02:01:46,355 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 02:01:46,355 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 02:01:46,355 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 02:01:46,355 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 02:01:46,355 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 02:01:46,356 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 02:01:46,599 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 02:01:46,618 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 02:01:46,620 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 02:01:46,621 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 02:01:46,622 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 02:01:46,623 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c [2023-04-03 02:01:47,818 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 02:01:48,083 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 02:01:48,084 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c [2023-04-03 02:01:48,097 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d9943066/6175508feb6f49afbba57fe333262003/FLAG94bbfac62 [2023-04-03 02:01:48,107 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d9943066/6175508feb6f49afbba57fe333262003 [2023-04-03 02:01:48,109 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 02:01:48,110 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 02:01:48,111 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 02:01:48,112 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 02:01:48,119 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 02:01:48,120 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:01:48" (1/1) ... [2023-04-03 02:01:48,120 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bb3aa89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:01:48, skipping insertion in model container [2023-04-03 02:01:48,121 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:01:48" (1/1) ... [2023-04-03 02:01:48,127 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 02:01:48,172 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 02:01:48,381 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_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c[26792,26805] [2023-04-03 02:01:48,384 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:01:48,394 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 02:01:48,464 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_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c[26792,26805] [2023-04-03 02:01:48,464 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:01:48,479 INFO L208 MainTranslator]: Completed translation [2023-04-03 02:01:48,479 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:01:48 WrapperNode [2023-04-03 02:01:48,479 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 02:01:48,480 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 02:01:48,480 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 02:01:48,480 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 02:01:48,490 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:01:48" (1/1) ... [2023-04-03 02:01:48,491 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:01:48" (1/1) ... [2023-04-03 02:01:48,520 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:01:48" (1/1) ... [2023-04-03 02:01:48,520 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:01:48" (1/1) ... [2023-04-03 02:01:48,558 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:01:48" (1/1) ... [2023-04-03 02:01:48,590 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:01:48" (1/1) ... [2023-04-03 02:01:48,595 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:01:48" (1/1) ... [2023-04-03 02:01:48,599 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:01:48" (1/1) ... [2023-04-03 02:01:48,605 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 02:01:48,606 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 02:01:48,606 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 02:01:48,607 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 02:01:48,607 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:01:48" (1/1) ... [2023-04-03 02:01:48,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:01:48,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:01:48,644 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-03 02:01:48,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-03 02:01:48,675 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 02:01:48,675 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 02:01:48,675 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 02:01:48,676 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 02:01:48,676 INFO L138 BoogieDeclarations]: Found implementation of procedure node1 [2023-04-03 02:01:48,676 INFO L138 BoogieDeclarations]: Found implementation of procedure node2 [2023-04-03 02:01:48,676 INFO L138 BoogieDeclarations]: Found implementation of procedure node3 [2023-04-03 02:01:48,676 INFO L138 BoogieDeclarations]: Found implementation of procedure node4 [2023-04-03 02:01:48,676 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2023-04-03 02:01:48,676 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2023-04-03 02:01:48,676 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 02:01:48,676 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2023-04-03 02:01:48,676 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 02:01:48,677 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 02:01:48,677 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 02:01:48,677 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 02:01:48,677 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 02:01:48,677 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-03 02:01:48,677 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 02:01:48,677 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 02:01:48,677 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 02:01:48,677 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 02:01:48,677 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 02:01:48,678 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 02:01:48,678 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 02:01:48,678 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 02:01:48,678 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-03 02:01:48,678 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 02:01:48,678 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 02:01:48,678 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 02:01:48,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 02:01:48,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 02:01:48,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 02:01:48,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 02:01:48,679 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 02:01:48,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 02:01:48,811 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 02:01:48,813 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 02:01:49,738 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 02:01:50,425 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 02:01:50,426 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-03 02:01:50,429 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:01:50 BoogieIcfgContainer [2023-04-03 02:01:50,429 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 02:01:50,432 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 02:01:50,432 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 02:01:50,435 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 02:01:50,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 02:01:48" (1/3) ... [2023-04-03 02:01:50,436 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a9160fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:01:50, skipping insertion in model container [2023-04-03 02:01:50,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:01:48" (2/3) ... [2023-04-03 02:01:50,436 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a9160fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:01:50, skipping insertion in model container [2023-04-03 02:01:50,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:01:50" (3/3) ... [2023-04-03 02:01:50,438 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c [2023-04-03 02:01:50,460 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 02:01:50,460 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 02:01:50,519 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 02:01:50,526 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;@6b4a0c1c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 02:01:50,527 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 02:01:50,532 INFO L276 IsEmpty]: Start isEmpty. Operand has 174 states, 152 states have (on average 1.5657894736842106) internal successors, (238), 154 states have internal predecessors, (238), 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) [2023-04-03 02:01:50,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-04-03 02:01:50,543 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:01:50,544 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] [2023-04-03 02:01:50,545 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:01:50,549 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:01:50,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1246980038, now seen corresponding path program 1 times [2023-04-03 02:01:50,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:01:50,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203609429] [2023-04-03 02:01:50,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:01:50,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:01:51,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:01:56,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:01:56,460 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:01:56,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203609429] [2023-04-03 02:01:56,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203609429] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:01:56,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:01:56,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-04-03 02:01:56,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210183055] [2023-04-03 02:01:56,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:01:56,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-03 02:01:56,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:01:56,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-03 02:01:56,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2023-04-03 02:01:56,508 INFO L87 Difference]: Start difference. First operand has 174 states, 152 states have (on average 1.5657894736842106) internal successors, (238), 154 states have internal predecessors, (238), 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) [2023-04-03 02:01:58,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:01:58,764 INFO L93 Difference]: Finished difference Result 266 states and 386 transitions. [2023-04-03 02:01:58,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-04-03 02:01:58,768 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 [2023-04-03 02:01:58,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:01:58,779 INFO L225 Difference]: With dead ends: 266 [2023-04-03 02:01:58,779 INFO L226 Difference]: Without dead ends: 225 [2023-04-03 02:01:58,783 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 [2023-04-03 02:01:58,787 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 1380 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 2372 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1383 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 2481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 2372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-04-03 02:01:58,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1383 Valid, 138 Invalid, 2481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 2372 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-04-03 02:01:58,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2023-04-03 02:01:58,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 201. [2023-04-03 02:01:58,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 171 states have (on average 1.5497076023391814) internal successors, (265), 172 states have internal predecessors, (265), 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) [2023-04-03 02:01:58,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 295 transitions. [2023-04-03 02:01:58,876 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 295 transitions. Word has length 85 [2023-04-03 02:01:58,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:01:58,877 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 295 transitions. [2023-04-03 02:01:58,877 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) [2023-04-03 02:01:58,877 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 295 transitions. [2023-04-03 02:01:58,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-03 02:01:58,887 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:01:58,887 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] [2023-04-03 02:01:58,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 02:01:58,887 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:01:58,888 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:01:58,888 INFO L85 PathProgramCache]: Analyzing trace with hash -187423196, now seen corresponding path program 1 times [2023-04-03 02:01:58,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:01:58,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265771087] [2023-04-03 02:01:58,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:01:58,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:01:58,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:02:01,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:02:01,047 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:02:01,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265771087] [2023-04-03 02:02:01,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265771087] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:02:01,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:02:01,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 02:02:01,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816568934] [2023-04-03 02:02:01,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:02:01,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 02:02:01,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:02:01,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 02:02:01,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-03 02:02:01,050 INFO L87 Difference]: Start difference. First operand 201 states and 295 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) [2023-04-03 02:02:02,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:02:02,201 INFO L93 Difference]: Finished difference Result 277 states and 392 transitions. [2023-04-03 02:02:02,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:02:02,201 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 [2023-04-03 02:02:02,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:02:02,204 INFO L225 Difference]: With dead ends: 277 [2023-04-03 02:02:02,204 INFO L226 Difference]: Without dead ends: 232 [2023-04-03 02:02:02,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-03 02:02:02,206 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 567 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 1775 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 1819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:02:02,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [570 Valid, 87 Invalid, 1819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1775 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-03 02:02:02,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2023-04-03 02:02:02,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 201. [2023-04-03 02:02:02,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 171 states have (on average 1.543859649122807) internal successors, (264), 172 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) [2023-04-03 02:02:02,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 293 transitions. [2023-04-03 02:02:02,229 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 293 transitions. Word has length 86 [2023-04-03 02:02:02,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:02:02,230 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 293 transitions. [2023-04-03 02:02:02,230 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) [2023-04-03 02:02:02,230 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 293 transitions. [2023-04-03 02:02:02,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-04-03 02:02:02,231 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:02:02,231 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] [2023-04-03 02:02:02,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 02:02:02,232 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:02:02,232 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:02:02,232 INFO L85 PathProgramCache]: Analyzing trace with hash -594188061, now seen corresponding path program 1 times [2023-04-03 02:02:02,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:02:02,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352026920] [2023-04-03 02:02:02,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:02:02,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:02:02,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:02:04,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:02:04,420 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:02:04,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352026920] [2023-04-03 02:02:04,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352026920] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:02:04,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:02:04,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 02:02:04,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723854544] [2023-04-03 02:02:04,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:02:04,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 02:02:04,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:02:04,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 02:02:04,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-03 02:02:04,424 INFO L87 Difference]: Start difference. First operand 201 states and 293 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) [2023-04-03 02:02:05,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:02:05,776 INFO L93 Difference]: Finished difference Result 271 states and 376 transitions. [2023-04-03 02:02:05,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:02:05,777 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 [2023-04-03 02:02:05,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:02:05,779 INFO L225 Difference]: With dead ends: 271 [2023-04-03 02:02:05,779 INFO L226 Difference]: Without dead ends: 231 [2023-04-03 02:02:05,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-03 02:02:05,781 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 570 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 2051 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 2089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 2051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:02:05,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [575 Valid, 96 Invalid, 2089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 2051 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-03 02:02:05,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2023-04-03 02:02:05,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 201. [2023-04-03 02:02:05,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 171 states have (on average 1.5380116959064327) internal successors, (263), 172 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) [2023-04-03 02:02:05,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 292 transitions. [2023-04-03 02:02:05,804 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 292 transitions. Word has length 87 [2023-04-03 02:02:05,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:02:05,805 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 292 transitions. [2023-04-03 02:02:05,805 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) [2023-04-03 02:02:05,805 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 292 transitions. [2023-04-03 02:02:05,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-04-03 02:02:05,806 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:02:05,806 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] [2023-04-03 02:02:05,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 02:02:05,806 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:02:05,807 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:02:05,807 INFO L85 PathProgramCache]: Analyzing trace with hash 787714413, now seen corresponding path program 1 times [2023-04-03 02:02:05,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:02:05,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933260053] [2023-04-03 02:02:05,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:02:05,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:02:05,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:02:07,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:02:07,729 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:02:07,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933260053] [2023-04-03 02:02:07,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933260053] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:02:07,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:02:07,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 02:02:07,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104322966] [2023-04-03 02:02:07,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:02:07,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 02:02:07,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:02:07,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 02:02:07,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-03 02:02:07,731 INFO L87 Difference]: Start difference. First operand 201 states and 292 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) [2023-04-03 02:02:08,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:02:08,922 INFO L93 Difference]: Finished difference Result 277 states and 381 transitions. [2023-04-03 02:02:08,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:02:08,922 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 [2023-04-03 02:02:08,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:02:08,924 INFO L225 Difference]: With dead ends: 277 [2023-04-03 02:02:08,924 INFO L226 Difference]: Without dead ends: 237 [2023-04-03 02:02:08,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-03 02:02:08,926 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 317 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1827 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 1855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:02:08,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 97 Invalid, 1855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1827 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-03 02:02:08,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2023-04-03 02:02:08,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 201. [2023-04-03 02:02:08,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 171 states have (on average 1.5321637426900585) internal successors, (262), 172 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) [2023-04-03 02:02:08,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 291 transitions. [2023-04-03 02:02:08,956 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 291 transitions. Word has length 88 [2023-04-03 02:02:08,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:02:08,956 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 291 transitions. [2023-04-03 02:02:08,957 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) [2023-04-03 02:02:08,957 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 291 transitions. [2023-04-03 02:02:08,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-04-03 02:02:08,962 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:02:08,963 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] [2023-04-03 02:02:08,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 02:02:08,963 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:02:08,964 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:02:08,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1783729548, now seen corresponding path program 1 times [2023-04-03 02:02:08,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:02:08,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575712108] [2023-04-03 02:02:08,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:02:08,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:02:09,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:02:10,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:02:10,831 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:02:10,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575712108] [2023-04-03 02:02:10,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575712108] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:02:10,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:02:10,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 02:02:10,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875016842] [2023-04-03 02:02:10,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:02:10,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 02:02:10,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:02:10,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 02:02:10,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-03 02:02:10,833 INFO L87 Difference]: Start difference. First operand 201 states and 291 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) [2023-04-03 02:02:12,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:02:12,139 INFO L93 Difference]: Finished difference Result 283 states and 386 transitions. [2023-04-03 02:02:12,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:02:12,139 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 [2023-04-03 02:02:12,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:02:12,141 INFO L225 Difference]: With dead ends: 283 [2023-04-03 02:02:12,141 INFO L226 Difference]: Without dead ends: 243 [2023-04-03 02:02:12,142 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 [2023-04-03 02:02:12,143 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 576 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 2091 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 585 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 2133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 2091 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:02:12,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [585 Valid, 100 Invalid, 2133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 2091 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-03 02:02:12,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2023-04-03 02:02:12,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 201. [2023-04-03 02:02:12,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 171 states have (on average 1.5263157894736843) internal successors, (261), 172 states have internal predecessors, (261), 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) [2023-04-03 02:02:12,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 290 transitions. [2023-04-03 02:02:12,182 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 290 transitions. Word has length 89 [2023-04-03 02:02:12,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:02:12,183 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 290 transitions. [2023-04-03 02:02:12,184 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) [2023-04-03 02:02:12,184 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 290 transitions. [2023-04-03 02:02:12,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-04-03 02:02:12,185 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:02:12,185 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] [2023-04-03 02:02:12,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 02:02:12,185 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:02:12,185 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:02:12,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1468558036, now seen corresponding path program 1 times [2023-04-03 02:02:12,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:02:12,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302407380] [2023-04-03 02:02:12,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:02:12,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:02:12,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:02:16,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:02:16,237 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:02:16,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302407380] [2023-04-03 02:02:16,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302407380] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:02:16,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:02:16,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2023-04-03 02:02:16,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166211562] [2023-04-03 02:02:16,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:02:16,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-03 02:02:16,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:02:16,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-03 02:02:16,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2023-04-03 02:02:16,239 INFO L87 Difference]: Start difference. First operand 201 states and 290 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) [2023-04-03 02:02:18,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:02:18,497 INFO L93 Difference]: Finished difference Result 295 states and 406 transitions. [2023-04-03 02:02:18,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-04-03 02:02:18,498 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 [2023-04-03 02:02:18,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:02:18,500 INFO L225 Difference]: With dead ends: 295 [2023-04-03 02:02:18,500 INFO L226 Difference]: Without dead ends: 251 [2023-04-03 02:02:18,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=435, Invalid=1457, Unknown=0, NotChecked=0, Total=1892 [2023-04-03 02:02:18,502 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 1790 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2441 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1793 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 2604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 2441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-04-03 02:02:18,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1793 Valid, 155 Invalid, 2604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 2441 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-04-03 02:02:18,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2023-04-03 02:02:18,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 205. [2023-04-03 02:02:18,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 175 states have (on average 1.5085714285714287) internal successors, (264), 176 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) [2023-04-03 02:02:18,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 293 transitions. [2023-04-03 02:02:18,544 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 293 transitions. Word has length 91 [2023-04-03 02:02:18,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:02:18,544 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 293 transitions. [2023-04-03 02:02:18,545 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) [2023-04-03 02:02:18,545 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 293 transitions. [2023-04-03 02:02:18,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-04-03 02:02:18,546 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:02:18,546 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] [2023-04-03 02:02:18,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-03 02:02:18,547 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:02:18,547 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:02:18,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1319365284, now seen corresponding path program 1 times [2023-04-03 02:02:18,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:02:18,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12838964] [2023-04-03 02:02:18,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:02:18,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:02:18,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:02:20,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:02:20,406 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:02:20,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12838964] [2023-04-03 02:02:20,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12838964] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:02:20,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:02:20,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 02:02:20,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294440483] [2023-04-03 02:02:20,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:02:20,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 02:02:20,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:02:20,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 02:02:20,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-04-03 02:02:20,408 INFO L87 Difference]: Start difference. First operand 205 states and 293 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) [2023-04-03 02:02:21,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:02:21,631 INFO L93 Difference]: Finished difference Result 296 states and 406 transitions. [2023-04-03 02:02:21,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:02:21,633 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 [2023-04-03 02:02:21,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:02:21,635 INFO L225 Difference]: With dead ends: 296 [2023-04-03 02:02:21,635 INFO L226 Difference]: Without dead ends: 248 [2023-04-03 02:02:21,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2023-04-03 02:02:21,636 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 555 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1884 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 1948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:02:21,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [561 Valid, 106 Invalid, 1948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1884 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-03 02:02:21,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2023-04-03 02:02:21,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 233. [2023-04-03 02:02:21,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 191 states have (on average 1.4659685863874345) internal successors, (280), 192 states have internal predecessors, (280), 21 states have call successors, (21), 21 states have call predecessors, (21), 20 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2023-04-03 02:02:21,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 322 transitions. [2023-04-03 02:02:21,675 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 322 transitions. Word has length 92 [2023-04-03 02:02:21,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:02:21,675 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 322 transitions. [2023-04-03 02:02:21,675 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) [2023-04-03 02:02:21,675 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 322 transitions. [2023-04-03 02:02:21,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-04-03 02:02:21,676 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:02:21,676 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] [2023-04-03 02:02:21,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-03 02:02:21,677 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:02:21,677 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:02:21,677 INFO L85 PathProgramCache]: Analyzing trace with hash 762425642, now seen corresponding path program 1 times [2023-04-03 02:02:21,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:02:21,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258933545] [2023-04-03 02:02:21,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:02:21,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:02:21,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:02:24,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:02:24,505 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:02:24,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258933545] [2023-04-03 02:02:24,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258933545] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:02:24,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:02:24,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2023-04-03 02:02:24,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996783037] [2023-04-03 02:02:24,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:02:24,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-03 02:02:24,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:02:24,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-03 02:02:24,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2023-04-03 02:02:24,507 INFO L87 Difference]: Start difference. First operand 233 states and 322 transitions. Second operand has 21 states, 11 states have (on average 6.909090909090909) internal successors, (76), 13 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) [2023-04-03 02:02:26,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:02:26,502 INFO L93 Difference]: Finished difference Result 364 states and 473 transitions. [2023-04-03 02:02:26,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-04-03 02:02:26,503 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 11 states have (on average 6.909090909090909) internal successors, (76), 13 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 [2023-04-03 02:02:26,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:02:26,508 INFO L225 Difference]: With dead ends: 364 [2023-04-03 02:02:26,508 INFO L226 Difference]: Without dead ends: 291 [2023-04-03 02:02:26,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=435, Invalid=1457, Unknown=0, NotChecked=0, Total=1892 [2023-04-03 02:02:26,510 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1319 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 2182 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1323 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 2322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 2182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:02:26,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1323 Valid, 149 Invalid, 2322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 2182 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-03 02:02:26,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2023-04-03 02:02:26,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 235. [2023-04-03 02:02:26,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 192 states have (on average 1.4583333333333333) internal successors, (280), 194 states have internal predecessors, (280), 21 states have call successors, (21), 21 states have call predecessors, (21), 21 states have return successors, (22), 19 states have call predecessors, (22), 20 states have call successors, (22) [2023-04-03 02:02:26,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 323 transitions. [2023-04-03 02:02:26,579 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 323 transitions. Word has length 94 [2023-04-03 02:02:26,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:02:26,579 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 323 transitions. [2023-04-03 02:02:26,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 11 states have (on average 6.909090909090909) internal successors, (76), 13 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) [2023-04-03 02:02:26,580 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 323 transitions. [2023-04-03 02:02:26,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-04-03 02:02:26,580 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:02:26,581 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] [2023-04-03 02:02:26,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-03 02:02:26,581 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:02:26,581 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:02:26,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1875591023, now seen corresponding path program 1 times [2023-04-03 02:02:26,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:02:26,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363033837] [2023-04-03 02:02:26,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:02:26,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:02:26,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:02:27,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:02:27,919 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:02:27,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363033837] [2023-04-03 02:02:27,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363033837] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:02:27,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:02:27,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-04-03 02:02:27,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417449382] [2023-04-03 02:02:27,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:02:27,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-03 02:02:27,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:02:27,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-03 02:02:27,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2023-04-03 02:02:27,921 INFO L87 Difference]: Start difference. First operand 235 states and 323 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) [2023-04-03 02:02:28,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:02:28,430 INFO L93 Difference]: Finished difference Result 269 states and 366 transitions. [2023-04-03 02:02:28,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-03 02:02:28,430 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 [2023-04-03 02:02:28,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:02:28,432 INFO L225 Difference]: With dead ends: 269 [2023-04-03 02:02:28,432 INFO L226 Difference]: Without dead ends: 267 [2023-04-03 02:02:28,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2023-04-03 02:02:28,435 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 36 mSDsluCounter, 2460 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 2691 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:02:28,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 2691 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 02:02:28,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2023-04-03 02:02:28,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 243. [2023-04-03 02:02:28,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 197 states have (on average 1.4467005076142132) internal successors, (285), 200 states have internal predecessors, (285), 22 states have call successors, (22), 22 states have call predecessors, (22), 23 states have return successors, (24), 20 states have call predecessors, (24), 21 states have call successors, (24) [2023-04-03 02:02:28,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 331 transitions. [2023-04-03 02:02:28,499 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 331 transitions. Word has length 95 [2023-04-03 02:02:28,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:02:28,500 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 331 transitions. [2023-04-03 02:02:28,500 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) [2023-04-03 02:02:28,500 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 331 transitions. [2023-04-03 02:02:28,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-04-03 02:02:28,501 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:02:28,501 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] [2023-04-03 02:02:28,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-03 02:02:28,501 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:02:28,502 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:02:28,502 INFO L85 PathProgramCache]: Analyzing trace with hash 599460459, now seen corresponding path program 1 times [2023-04-03 02:02:28,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:02:28,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610829144] [2023-04-03 02:02:28,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:02:28,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:02:29,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:02:44,546 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-03 02:02:44,547 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:02:44,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610829144] [2023-04-03 02:02:44,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610829144] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:02:44,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008355313] [2023-04-03 02:02:44,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:02:44,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:02:44,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:02:44,550 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 02:02:44,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-03 02:02:44,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:02:44,904 INFO L262 TraceCheckSpWp]: Trace formula consists of 1646 conjuncts, 99 conjunts are in the unsatisfiable core [2023-04-03 02:02:44,932 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:03:08,951 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:03:08,952 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 02:03:09,666 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 19690 disjunctions. This might take some time... [2023-04-03 02:03:27,106 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 19690 disjunctions.