/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-reduced/pals_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 06:35:39,398 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 06:35:39,400 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 06:35:39,418 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 06:35:39,418 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 06:35:39,419 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 06:35:39,420 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 06:35:39,421 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 06:35:39,422 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 06:35:39,423 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 06:35:39,423 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 06:35:39,424 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 06:35:39,424 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 06:35:39,425 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 06:35:39,426 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 06:35:39,426 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 06:35:39,427 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 06:35:39,428 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 06:35:39,429 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 06:35:39,430 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 06:35:39,431 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 06:35:39,432 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 06:35:39,432 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 06:35:39,433 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 06:35:39,435 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 06:35:39,436 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 06:35:39,436 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 06:35:39,436 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 06:35:39,437 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 06:35:39,437 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 06:35:39,437 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 06:35:39,438 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 06:35:39,438 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 06:35:39,439 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 06:35:39,439 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 06:35:39,439 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 06:35:39,440 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 06:35:39,440 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 06:35:39,440 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 06:35:39,441 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 06:35:39,441 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 06:35:39,442 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 06:35:39,456 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 06:35:39,456 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 06:35:39,456 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 06:35:39,457 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 06:35:39,457 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 06:35:39,457 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 06:35:39,457 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 06:35:39,457 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 06:35:39,457 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 06:35:39,458 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 06:35:39,458 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 06:35:39,458 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 06:35:39,458 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 06:35:39,458 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 06:35:39,458 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 06:35:39,458 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 06:35:39,458 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 06:35:39,458 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 06:35:39,459 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 06:35:39,459 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 06:35:39,459 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 06:35:39,459 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 06:35:39,459 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 06:35:39,459 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 06:35:39,459 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 06:35:39,459 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 06:35:39,459 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 06:35:39,459 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 06:35:39,459 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 06:35:39,460 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 06:35:39,460 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 06:35:39,460 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 06:35:39,460 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:35:39,460 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 06:35:39,460 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 06:35:39,460 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 06:35:39,460 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 06:35:39,460 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 06:35:39,460 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 06:35:39,461 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 06:35:39,461 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 06:35:39,461 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 06:35:39,608 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 06:35:39,634 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 06:35:39,636 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 06:35:39,639 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 06:35:39,640 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 06:35:39,641 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2023-04-01 06:35:40,776 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 06:35:40,972 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 06:35:40,973 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2023-04-01 06:35:40,980 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28621d819/ce46e4cdbc9948ad890c00bf388763d6/FLAG8bbf781df [2023-04-01 06:35:40,994 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28621d819/ce46e4cdbc9948ad890c00bf388763d6 [2023-04-01 06:35:40,995 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 06:35:40,996 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 06:35:40,997 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 06:35:40,997 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 06:35:41,000 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 06:35:41,001 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:35:40" (1/1) ... [2023-04-01 06:35:41,002 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@390d87d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:35:41, skipping insertion in model container [2023-04-01 06:35:41,002 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:35:40" (1/1) ... [2023-04-01 06:35:41,008 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 06:35:41,044 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 06:35:41,239 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[9868,9881] [2023-04-01 06:35:41,285 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:35:41,296 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 06:35:41,340 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[9868,9881] [2023-04-01 06:35:41,370 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:35:41,383 INFO L208 MainTranslator]: Completed translation [2023-04-01 06:35:41,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:35:41 WrapperNode [2023-04-01 06:35:41,384 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 06:35:41,384 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 06:35:41,385 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 06:35:41,385 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 06:35:41,396 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:35:41" (1/1) ... [2023-04-01 06:35:41,397 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:35:41" (1/1) ... [2023-04-01 06:35:41,407 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:35:41" (1/1) ... [2023-04-01 06:35:41,407 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:35:41" (1/1) ... [2023-04-01 06:35:41,431 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:35:41" (1/1) ... [2023-04-01 06:35:41,449 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:35:41" (1/1) ... [2023-04-01 06:35:41,452 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:35:41" (1/1) ... [2023-04-01 06:35:41,454 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:35:41" (1/1) ... [2023-04-01 06:35:41,470 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 06:35:41,471 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 06:35:41,471 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 06:35:41,471 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 06:35:41,474 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:35:41" (1/1) ... [2023-04-01 06:35:41,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:35:41,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:35:41,530 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 06:35:41,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 06:35:41,564 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 06:35:41,564 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 06:35:41,564 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 06:35:41,564 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 06:35:41,565 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 06:35:41,565 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 06:35:41,565 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 06:35:41,565 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 06:35:41,565 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 06:35:41,566 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 06:35:41,567 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 06:35:41,567 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-01 06:35:41,567 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 06:35:41,567 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 06:35:41,567 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 06:35:41,567 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 06:35:41,567 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 06:35:41,567 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 06:35:41,568 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 06:35:41,568 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-01 06:35:41,568 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2023-04-01 06:35:41,568 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2023-04-01 06:35:41,568 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 06:35:41,568 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 06:35:41,568 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 06:35:41,568 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 06:35:41,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 06:35:41,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 06:35:41,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 06:35:41,569 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 06:35:41,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 06:35:41,764 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 06:35:41,766 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 06:35:42,487 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 06:35:42,639 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 06:35:42,639 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-01 06:35:42,643 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:35:42 BoogieIcfgContainer [2023-04-01 06:35:42,643 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 06:35:42,645 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 06:35:42,645 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 06:35:42,648 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 06:35:42,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 06:35:40" (1/3) ... [2023-04-01 06:35:42,649 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19965dd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:35:42, skipping insertion in model container [2023-04-01 06:35:42,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:35:41" (2/3) ... [2023-04-01 06:35:42,649 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19965dd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:35:42, skipping insertion in model container [2023-04-01 06:35:42,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:35:42" (3/3) ... [2023-04-01 06:35:42,652 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2023-04-01 06:35:42,663 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 06:35:42,663 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 06:35:42,708 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 06:35:42,712 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;@9ea5fb8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 06:35:42,713 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 06:35:42,716 INFO L276 IsEmpty]: Start isEmpty. Operand has 201 states, 195 states have (on average 1.7025641025641025) internal successors, (332), 196 states have internal predecessors, (332), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 06:35:42,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-04-01 06:35:42,723 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:35:42,723 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:35:42,724 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:35:42,726 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:35:42,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1538337819, now seen corresponding path program 1 times [2023-04-01 06:35:42,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:35:42,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980414261] [2023-04-01 06:35:42,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:35:42,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:35:42,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:35:43,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:35:43,438 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:35:43,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980414261] [2023-04-01 06:35:43,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980414261] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:35:43,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:35:43,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-01 06:35:43,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868190072] [2023-04-01 06:35:43,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:35:43,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 06:35:43,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:35:43,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 06:35:43,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-04-01 06:35:43,462 INFO L87 Difference]: Start difference. First operand has 201 states, 195 states have (on average 1.7025641025641025) internal successors, (332), 196 states have internal predecessors, (332), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:35:43,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:35:43,866 INFO L93 Difference]: Finished difference Result 790 states and 1257 transitions. [2023-04-01 06:35:43,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 06:35:43,869 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2023-04-01 06:35:43,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:35:43,883 INFO L225 Difference]: With dead ends: 790 [2023-04-01 06:35:43,884 INFO L226 Difference]: Without dead ends: 663 [2023-04-01 06:35:43,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-04-01 06:35:43,891 INFO L413 NwaCegarLoop]: 640 mSDtfsCounter, 1193 mSDsluCounter, 1442 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1193 SdHoareTripleChecker+Valid, 2082 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 06:35:43,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1193 Valid, 2082 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 06:35:43,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2023-04-01 06:35:44,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 653. [2023-04-01 06:35:44,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 649 states have (on average 1.423728813559322) internal successors, (924), 649 states have internal predecessors, (924), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:35:44,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 927 transitions. [2023-04-01 06:35:44,089 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 927 transitions. Word has length 85 [2023-04-01 06:35:44,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:35:44,091 INFO L495 AbstractCegarLoop]: Abstraction has 653 states and 927 transitions. [2023-04-01 06:35:44,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:35:44,091 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 927 transitions. [2023-04-01 06:35:44,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-01 06:35:44,102 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:35:44,102 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:35:44,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 06:35:44,103 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:35:44,104 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:35:44,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1503723259, now seen corresponding path program 1 times [2023-04-01 06:35:44,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:35:44,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610892979] [2023-04-01 06:35:44,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:35:44,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:35:44,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:35:44,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:35:44,332 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:35:44,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610892979] [2023-04-01 06:35:44,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610892979] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:35:44,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:35:44,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:35:44,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437901498] [2023-04-01 06:35:44,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:35:44,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:35:44,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:35:44,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:35:44,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:35:44,345 INFO L87 Difference]: Start difference. First operand 653 states and 927 transitions. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:35:44,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:35:44,686 INFO L93 Difference]: Finished difference Result 1622 states and 2367 transitions. [2023-04-01 06:35:44,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 06:35:44,690 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2023-04-01 06:35:44,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:35:44,694 INFO L225 Difference]: With dead ends: 1622 [2023-04-01 06:35:44,694 INFO L226 Difference]: Without dead ends: 1039 [2023-04-01 06:35:44,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:35:44,702 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 700 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 06:35:44,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [700 Valid, 278 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 06:35:44,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2023-04-01 06:35:44,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 1037. [2023-04-01 06:35:44,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1037 states, 1033 states have (on average 1.4559535333978704) internal successors, (1504), 1033 states have internal predecessors, (1504), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:35:44,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1037 states to 1037 states and 1507 transitions. [2023-04-01 06:35:44,837 INFO L78 Accepts]: Start accepts. Automaton has 1037 states and 1507 transitions. Word has length 86 [2023-04-01 06:35:44,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:35:44,838 INFO L495 AbstractCegarLoop]: Abstraction has 1037 states and 1507 transitions. [2023-04-01 06:35:44,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:35:44,839 INFO L276 IsEmpty]: Start isEmpty. Operand 1037 states and 1507 transitions. [2023-04-01 06:35:44,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-01 06:35:44,841 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:35:44,842 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:35:44,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 06:35:44,842 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:35:44,842 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:35:44,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1876414284, now seen corresponding path program 1 times [2023-04-01 06:35:44,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:35:44,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488119770] [2023-04-01 06:35:44,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:35:44,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:35:44,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:35:44,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:35:44,986 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:35:44,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488119770] [2023-04-01 06:35:44,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488119770] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:35:44,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:35:44,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:35:44,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195501635] [2023-04-01 06:35:44,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:35:44,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:35:44,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:35:44,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:35:44,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:35:44,990 INFO L87 Difference]: Start difference. First operand 1037 states and 1507 transitions. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:35:45,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:35:45,374 INFO L93 Difference]: Finished difference Result 2751 states and 4080 transitions. [2023-04-01 06:35:45,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 06:35:45,375 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2023-04-01 06:35:45,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:35:45,381 INFO L225 Difference]: With dead ends: 2751 [2023-04-01 06:35:45,381 INFO L226 Difference]: Without dead ends: 1807 [2023-04-01 06:35:45,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:35:45,387 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 683 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 683 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 06:35:45,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [683 Valid, 286 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 06:35:45,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1807 states. [2023-04-01 06:35:45,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1807 to 1805. [2023-04-01 06:35:45,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1805 states, 1801 states have (on average 1.475846751804553) internal successors, (2658), 1801 states have internal predecessors, (2658), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:35:45,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1805 states to 1805 states and 2661 transitions. [2023-04-01 06:35:45,573 INFO L78 Accepts]: Start accepts. Automaton has 1805 states and 2661 transitions. Word has length 86 [2023-04-01 06:35:45,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:35:45,574 INFO L495 AbstractCegarLoop]: Abstraction has 1805 states and 2661 transitions. [2023-04-01 06:35:45,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:35:45,574 INFO L276 IsEmpty]: Start isEmpty. Operand 1805 states and 2661 transitions. [2023-04-01 06:35:45,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-01 06:35:45,575 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:35:45,575 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:35:45,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 06:35:45,577 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:35:45,577 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:35:45,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1471228946, now seen corresponding path program 1 times [2023-04-01 06:35:45,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:35:45,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930845185] [2023-04-01 06:35:45,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:35:45,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:35:45,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:35:45,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:35:45,697 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:35:45,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930845185] [2023-04-01 06:35:45,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930845185] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:35:45,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:35:45,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:35:45,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450325116] [2023-04-01 06:35:45,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:35:45,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:35:45,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:35:45,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:35:45,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:35:45,699 INFO L87 Difference]: Start difference. First operand 1805 states and 2661 transitions. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:35:46,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:35:46,222 INFO L93 Difference]: Finished difference Result 4988 states and 7454 transitions. [2023-04-01 06:35:46,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 06:35:46,223 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2023-04-01 06:35:46,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:35:46,233 INFO L225 Difference]: With dead ends: 4988 [2023-04-01 06:35:46,233 INFO L226 Difference]: Without dead ends: 3343 [2023-04-01 06:35:46,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:35:46,236 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 655 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 655 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 06:35:46,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [655 Valid, 302 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 06:35:46,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3343 states. [2023-04-01 06:35:46,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3343 to 3341. [2023-04-01 06:35:46,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3341 states, 3337 states have (on average 1.485765657776446) internal successors, (4958), 3337 states have internal predecessors, (4958), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:35:46,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3341 states to 3341 states and 4961 transitions. [2023-04-01 06:35:46,574 INFO L78 Accepts]: Start accepts. Automaton has 3341 states and 4961 transitions. Word has length 86 [2023-04-01 06:35:46,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:35:46,575 INFO L495 AbstractCegarLoop]: Abstraction has 3341 states and 4961 transitions. [2023-04-01 06:35:46,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:35:46,575 INFO L276 IsEmpty]: Start isEmpty. Operand 3341 states and 4961 transitions. [2023-04-01 06:35:46,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-01 06:35:46,576 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:35:46,576 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:35:46,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 06:35:46,576 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:35:46,576 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:35:46,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1578203073, now seen corresponding path program 1 times [2023-04-01 06:35:46,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:35:46,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007895832] [2023-04-01 06:35:46,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:35:46,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:35:46,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:35:46,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:35:46,672 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:35:46,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007895832] [2023-04-01 06:35:46,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007895832] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:35:46,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:35:46,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:35:46,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551884321] [2023-04-01 06:35:46,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:35:46,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:35:46,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:35:46,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:35:46,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:35:46,678 INFO L87 Difference]: Start difference. First operand 3341 states and 4961 transitions. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:35:47,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:35:47,488 INFO L93 Difference]: Finished difference Result 9555 states and 14309 transitions. [2023-04-01 06:35:47,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 06:35:47,489 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2023-04-01 06:35:47,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:35:47,507 INFO L225 Difference]: With dead ends: 9555 [2023-04-01 06:35:47,508 INFO L226 Difference]: Without dead ends: 6415 [2023-04-01 06:35:47,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:35:47,513 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 673 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 673 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:35:47,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [673 Valid, 303 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:35:47,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6415 states. [2023-04-01 06:35:48,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6415 to 6413. [2023-04-01 06:35:48,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6413 states, 6409 states have (on average 1.4891558745514122) internal successors, (9544), 6409 states have internal predecessors, (9544), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:35:48,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6413 states to 6413 states and 9547 transitions. [2023-04-01 06:35:48,180 INFO L78 Accepts]: Start accepts. Automaton has 6413 states and 9547 transitions. Word has length 86 [2023-04-01 06:35:48,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:35:48,180 INFO L495 AbstractCegarLoop]: Abstraction has 6413 states and 9547 transitions. [2023-04-01 06:35:48,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:35:48,181 INFO L276 IsEmpty]: Start isEmpty. Operand 6413 states and 9547 transitions. [2023-04-01 06:35:48,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-01 06:35:48,181 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:35:48,181 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:35:48,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 06:35:48,182 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:35:48,182 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:35:48,182 INFO L85 PathProgramCache]: Analyzing trace with hash -990434403, now seen corresponding path program 1 times [2023-04-01 06:35:48,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:35:48,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763109536] [2023-04-01 06:35:48,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:35:48,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:35:48,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:35:48,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:35:48,275 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:35:48,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763109536] [2023-04-01 06:35:48,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763109536] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:35:48,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:35:48,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:35:48,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593230332] [2023-04-01 06:35:48,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:35:48,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:35:48,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:35:48,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:35:48,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:35:48,276 INFO L87 Difference]: Start difference. First operand 6413 states and 9547 transitions. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:35:49,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:35:49,806 INFO L93 Difference]: Finished difference Result 18849 states and 28177 transitions. [2023-04-01 06:35:49,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 06:35:49,807 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2023-04-01 06:35:49,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:35:49,846 INFO L225 Difference]: With dead ends: 18849 [2023-04-01 06:35:49,846 INFO L226 Difference]: Without dead ends: 12559 [2023-04-01 06:35:49,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:35:49,856 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 654 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 654 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 06:35:49,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [654 Valid, 294 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 06:35:49,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12559 states. [2023-04-01 06:35:51,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12559 to 12557. [2023-04-01 06:35:51,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12557 states, 12553 states have (on average 1.4851429937066836) internal successors, (18643), 12553 states have internal predecessors, (18643), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:35:51,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12557 states to 12557 states and 18646 transitions. [2023-04-01 06:35:51,377 INFO L78 Accepts]: Start accepts. Automaton has 12557 states and 18646 transitions. Word has length 86 [2023-04-01 06:35:51,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:35:51,378 INFO L495 AbstractCegarLoop]: Abstraction has 12557 states and 18646 transitions. [2023-04-01 06:35:51,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:35:51,378 INFO L276 IsEmpty]: Start isEmpty. Operand 12557 states and 18646 transitions. [2023-04-01 06:35:51,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-01 06:35:51,380 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:35:51,380 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:35:51,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 06:35:51,380 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:35:51,380 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:35:51,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1681720662, now seen corresponding path program 1 times [2023-04-01 06:35:51,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:35:51,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566176369] [2023-04-01 06:35:51,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:35:51,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:35:51,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:35:51,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:35:51,501 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:35:51,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566176369] [2023-04-01 06:35:51,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566176369] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:35:51,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:35:51,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:35:51,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239186155] [2023-04-01 06:35:51,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:35:51,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:35:51,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:35:51,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:35:51,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:35:51,504 INFO L87 Difference]: Start difference. First operand 12557 states and 18646 transitions. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:35:54,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:35:54,206 INFO L93 Difference]: Finished difference Result 35622 states and 52963 transitions. [2023-04-01 06:35:54,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 06:35:54,206 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2023-04-01 06:35:54,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:35:54,251 INFO L225 Difference]: With dead ends: 35622 [2023-04-01 06:35:54,251 INFO L226 Difference]: Without dead ends: 23119 [2023-04-01 06:35:54,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:35:54,271 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 681 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 681 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 06:35:54,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [681 Valid, 270 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 06:35:54,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23119 states. [2023-04-01 06:35:57,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23119 to 23117. [2023-04-01 06:35:57,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23117 states, 23113 states have (on average 1.4731536364816338) internal successors, (34049), 23113 states have internal predecessors, (34049), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:35:57,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23117 states to 23117 states and 34052 transitions. [2023-04-01 06:35:57,137 INFO L78 Accepts]: Start accepts. Automaton has 23117 states and 34052 transitions. Word has length 86 [2023-04-01 06:35:57,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:35:57,138 INFO L495 AbstractCegarLoop]: Abstraction has 23117 states and 34052 transitions. [2023-04-01 06:35:57,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:35:57,139 INFO L276 IsEmpty]: Start isEmpty. Operand 23117 states and 34052 transitions. [2023-04-01 06:35:57,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-04-01 06:35:57,139 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:35:57,139 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:35:57,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 06:35:57,140 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:35:57,140 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:35:57,140 INFO L85 PathProgramCache]: Analyzing trace with hash 684072134, now seen corresponding path program 1 times [2023-04-01 06:35:57,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:35:57,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116441377] [2023-04-01 06:35:57,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:35:57,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:35:57,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:35:58,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:35:58,873 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:35:58,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116441377] [2023-04-01 06:35:58,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116441377] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:35:58,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:35:58,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2023-04-01 06:35:58,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018156014] [2023-04-01 06:35:58,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:35:58,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-01 06:35:58,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:35:58,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-01 06:35:58,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2023-04-01 06:35:58,874 INFO L87 Difference]: Start difference. First operand 23117 states and 34052 transitions. Second operand has 21 states, 21 states have (on average 4.0) internal successors, (84), 21 states have internal predecessors, (84), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:36:05,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:36:05,792 INFO L93 Difference]: Finished difference Result 54921 states and 80666 transitions. [2023-04-01 06:36:05,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-01 06:36:05,793 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.0) internal successors, (84), 21 states have internal predecessors, (84), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2023-04-01 06:36:05,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:36:06,014 INFO L225 Difference]: With dead ends: 54921 [2023-04-01 06:36:06,015 INFO L226 Difference]: Without dead ends: 54919 [2023-04-01 06:36:06,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=224, Invalid=832, Unknown=0, NotChecked=0, Total=1056 [2023-04-01 06:36:06,034 INFO L413 NwaCegarLoop]: 308 mSDtfsCounter, 1280 mSDsluCounter, 2420 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1280 SdHoareTripleChecker+Valid, 2728 SdHoareTripleChecker+Invalid, 939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 06:36:06,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1280 Valid, 2728 Invalid, 939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 06:36:06,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54919 states. [2023-04-01 06:36:11,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54919 to 42452. [2023-04-01 06:36:11,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42452 states, 42448 states have (on average 1.4661468149264982) internal successors, (62235), 42448 states have internal predecessors, (62235), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:36:11,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42452 states to 42452 states and 62238 transitions. [2023-04-01 06:36:11,933 INFO L78 Accepts]: Start accepts. Automaton has 42452 states and 62238 transitions. Word has length 87 [2023-04-01 06:36:11,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:36:11,934 INFO L495 AbstractCegarLoop]: Abstraction has 42452 states and 62238 transitions. [2023-04-01 06:36:11,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.0) internal successors, (84), 21 states have internal predecessors, (84), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:36:11,934 INFO L276 IsEmpty]: Start isEmpty. Operand 42452 states and 62238 transitions. [2023-04-01 06:36:11,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-04-01 06:36:11,937 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:36:11,938 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:36:11,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 06:36:11,938 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:36:11,939 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:36:11,939 INFO L85 PathProgramCache]: Analyzing trace with hash 2028156006, now seen corresponding path program 1 times [2023-04-01 06:36:11,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:36:11,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245929311] [2023-04-01 06:36:11,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:36:11,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:36:11,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:36:13,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:36:13,354 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:36:13,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245929311] [2023-04-01 06:36:13,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245929311] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:36:13,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:36:13,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2023-04-01 06:36:13,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860279187] [2023-04-01 06:36:13,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:36:13,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-01 06:36:13,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:36:13,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-01 06:36:13,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2023-04-01 06:36:13,356 INFO L87 Difference]: Start difference. First operand 42452 states and 62238 transitions. Second operand has 21 states, 21 states have (on average 4.0) internal successors, (84), 21 states have internal predecessors, (84), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:36:22,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:36:22,871 INFO L93 Difference]: Finished difference Result 67919 states and 99463 transitions. [2023-04-01 06:36:22,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-01 06:36:22,872 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.0) internal successors, (84), 21 states have internal predecessors, (84), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2023-04-01 06:36:22,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:36:23,059 INFO L225 Difference]: With dead ends: 67919 [2023-04-01 06:36:23,059 INFO L226 Difference]: Without dead ends: 67917 [2023-04-01 06:36:23,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=224, Invalid=832, Unknown=0, NotChecked=0, Total=1056 [2023-04-01 06:36:23,079 INFO L413 NwaCegarLoop]: 430 mSDtfsCounter, 1241 mSDsluCounter, 2644 mSDsCounter, 0 mSdLazyCounter, 1066 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1241 SdHoareTripleChecker+Valid, 3074 SdHoareTripleChecker+Invalid, 1098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1066 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 06:36:23,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1241 Valid, 3074 Invalid, 1098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1066 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 06:36:23,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67917 states. [2023-04-01 06:36:28,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67917 to 42485. [2023-04-01 06:36:28,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42485 states, 42481 states have (on average 1.4659730232339163) internal successors, (62276), 42481 states have internal predecessors, (62276), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:36:28,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42485 states to 42485 states and 62279 transitions. [2023-04-01 06:36:28,889 INFO L78 Accepts]: Start accepts. Automaton has 42485 states and 62279 transitions. Word has length 87 [2023-04-01 06:36:28,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:36:28,889 INFO L495 AbstractCegarLoop]: Abstraction has 42485 states and 62279 transitions. [2023-04-01 06:36:28,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.0) internal successors, (84), 21 states have internal predecessors, (84), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:36:28,890 INFO L276 IsEmpty]: Start isEmpty. Operand 42485 states and 62279 transitions. [2023-04-01 06:36:28,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-04-01 06:36:28,891 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:36:28,891 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:36:28,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 06:36:28,891 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:36:28,891 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:36:28,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1502749606, now seen corresponding path program 1 times [2023-04-01 06:36:28,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:36:28,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680607073] [2023-04-01 06:36:28,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:36:28,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:36:28,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:36:30,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:36:30,873 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:36:30,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680607073] [2023-04-01 06:36:30,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680607073] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:36:30,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:36:30,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2023-04-01 06:36:30,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938811032] [2023-04-01 06:36:30,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:36:30,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-01 06:36:30,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:36:30,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-01 06:36:30,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2023-04-01 06:36:30,875 INFO L87 Difference]: Start difference. First operand 42485 states and 62279 transitions. Second operand has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 25 states have internal predecessors, (84), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:36:40,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:36:40,278 INFO L93 Difference]: Finished difference Result 58811 states and 85978 transitions. [2023-04-01 06:36:40,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-01 06:36:40,279 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 25 states have internal predecessors, (84), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2023-04-01 06:36:40,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:36:40,397 INFO L225 Difference]: With dead ends: 58811 [2023-04-01 06:36:40,397 INFO L226 Difference]: Without dead ends: 54073 [2023-04-01 06:36:40,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=379, Invalid=1513, Unknown=0, NotChecked=0, Total=1892 [2023-04-01 06:36:40,418 INFO L413 NwaCegarLoop]: 258 mSDtfsCounter, 1642 mSDsluCounter, 2060 mSDsCounter, 0 mSdLazyCounter, 2763 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1642 SdHoareTripleChecker+Valid, 2318 SdHoareTripleChecker+Invalid, 2801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 2763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-01 06:36:40,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1642 Valid, 2318 Invalid, 2801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 2763 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-01 06:36:40,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54073 states.