/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.6.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 02:53:15,552 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 02:53:15,554 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 02:53:15,587 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 02:53:15,588 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 02:53:15,590 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 02:53:15,596 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 02:53:15,598 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 02:53:15,599 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 02:53:15,604 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 02:53:15,605 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 02:53:15,607 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 02:53:15,607 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 02:53:15,609 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 02:53:15,611 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 02:53:15,613 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 02:53:15,614 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 02:53:15,615 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 02:53:15,616 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 02:53:15,621 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 02:53:15,622 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 02:53:15,623 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 02:53:15,624 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 02:53:15,625 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 02:53:15,632 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 02:53:15,633 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 02:53:15,633 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 02:53:15,634 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 02:53:15,635 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 02:53:15,635 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 02:53:15,636 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 02:53:15,637 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 02:53:15,638 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 02:53:15,638 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 02:53:15,639 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 02:53:15,639 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 02:53:15,639 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 02:53:15,640 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 02:53:15,640 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 02:53:15,641 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 02:53:15,641 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 02:53:15,642 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-03 02:53:15,676 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 02:53:15,676 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 02:53:15,676 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 02:53:15,676 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 02:53:15,677 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 02:53:15,677 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 02:53:15,678 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 02:53:15,678 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 02:53:15,678 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 02:53:15,678 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 02:53:15,679 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 02:53:15,679 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 02:53:15,679 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 02:53:15,679 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 02:53:15,679 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 02:53:15,680 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 02:53:15,680 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 02:53:15,680 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 02:53:15,680 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 02:53:15,681 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 02:53:15,681 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 02:53:15,681 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 02:53:15,681 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 02:53:15,681 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 02:53:15,681 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 02:53:15,682 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 02:53:15,682 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 02:53:15,682 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 02:53:15,682 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 02:53:15,682 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 02:53:15,682 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 02:53:15,683 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 02:53:15,683 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:53:15,683 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 02:53:15,683 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 02:53:15,683 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 02:53:15,684 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 02:53:15,684 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 02:53:15,684 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 02:53:15,684 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 02:53:15,684 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 02:53:15,684 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 02:53:15,896 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 02:53:15,918 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 02:53:15,920 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 02:53:15,921 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 02:53:15,922 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 02:53:15,923 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2023-04-03 02:53:17,101 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 02:53:17,334 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 02:53:17,338 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2023-04-03 02:53:17,352 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3c4ba843/741c64249bac436881ad1bb0fb392a3a/FLAG605ccf30e [2023-04-03 02:53:17,362 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3c4ba843/741c64249bac436881ad1bb0fb392a3a [2023-04-03 02:53:17,364 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 02:53:17,365 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 02:53:17,366 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 02:53:17,366 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 02:53:17,371 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 02:53:17,372 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:53:17" (1/1) ... [2023-04-03 02:53:17,373 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bb64984 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:53:17, skipping insertion in model container [2023-04-03 02:53:17,373 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:53:17" (1/1) ... [2023-04-03 02:53:17,379 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 02:53:17,429 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 02:53:17,650 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.6.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[9868,9881] [2023-04-03 02:53:17,707 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:53:17,723 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 02:53:17,826 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.6.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[9868,9881] [2023-04-03 02:53:17,878 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:53:17,893 INFO L208 MainTranslator]: Completed translation [2023-04-03 02:53:17,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:53:17 WrapperNode [2023-04-03 02:53:17,893 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 02:53:17,894 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 02:53:17,894 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 02:53:17,894 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 02:53:17,904 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:53:17" (1/1) ... [2023-04-03 02:53:17,905 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:53:17" (1/1) ... [2023-04-03 02:53:17,917 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:53:17" (1/1) ... [2023-04-03 02:53:17,917 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:53:17" (1/1) ... [2023-04-03 02:53:17,934 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:53:17" (1/1) ... [2023-04-03 02:53:17,945 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:53:17" (1/1) ... [2023-04-03 02:53:17,948 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:53:17" (1/1) ... [2023-04-03 02:53:17,951 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:53:17" (1/1) ... [2023-04-03 02:53:17,955 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 02:53:17,956 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 02:53:17,956 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 02:53:17,956 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 02:53:17,957 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:53:17" (1/1) ... [2023-04-03 02:53:17,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:53:17,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:53:18,012 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-03 02:53:18,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-03 02:53:18,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 02:53:18,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 02:53:18,052 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 02:53:18,052 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 02:53:18,052 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 02:53:18,052 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 02:53:18,052 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 02:53:18,053 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 02:53:18,053 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 02:53:18,054 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 02:53:18,054 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 02:53:18,054 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-03 02:53:18,054 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 02:53:18,055 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 02:53:18,055 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 02:53:18,055 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 02:53:18,055 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 02:53:18,055 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 02:53:18,055 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 02:53:18,055 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-03 02:53:18,055 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2023-04-03 02:53:18,055 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2023-04-03 02:53:18,055 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 02:53:18,056 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 02:53:18,056 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 02:53:18,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 02:53:18,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 02:53:18,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 02:53:18,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 02:53:18,056 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 02:53:18,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 02:53:18,227 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 02:53:18,229 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 02:53:18,981 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 02:53:19,176 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 02:53:19,177 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-03 02:53:19,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:53:19 BoogieIcfgContainer [2023-04-03 02:53:19,180 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 02:53:19,183 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 02:53:19,183 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 02:53:19,185 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 02:53:19,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 02:53:17" (1/3) ... [2023-04-03 02:53:19,186 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b9ceac2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:53:19, skipping insertion in model container [2023-04-03 02:53:19,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:53:17" (2/3) ... [2023-04-03 02:53:19,186 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b9ceac2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:53:19, skipping insertion in model container [2023-04-03 02:53:19,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:53:19" (3/3) ... [2023-04-03 02:53:19,189 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.6.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2023-04-03 02:53:19,205 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 02:53:19,205 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 02:53:19,262 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 02:53:19,270 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;@3ae0e797, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 02:53:19,270 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 02:53:19,277 INFO L276 IsEmpty]: Start isEmpty. Operand has 192 states, 186 states have (on average 1.7043010752688172) internal successors, (317), 187 states have internal predecessors, (317), 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) [2023-04-03 02:53:19,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-04-03 02:53:19,291 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:53:19,292 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] [2023-04-03 02:53:19,294 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:53:19,299 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:53:19,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1730481625, now seen corresponding path program 1 times [2023-04-03 02:53:19,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:53:19,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847509883] [2023-04-03 02:53:19,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:53:19,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:53:19,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:53:20,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:53:20,249 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:53:20,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847509883] [2023-04-03 02:53:20,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847509883] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:53:20,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:53:20,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-03 02:53:20,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28959698] [2023-04-03 02:53:20,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:53:20,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-03 02:53:20,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:53:20,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-03 02:53:20,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-04-03 02:53:20,312 INFO L87 Difference]: Start difference. First operand has 192 states, 186 states have (on average 1.7043010752688172) internal successors, (317), 187 states have internal predecessors, (317), 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 10.125) internal successors, (81), 8 states have internal predecessors, (81), 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) [2023-04-03 02:53:20,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:53:20,840 INFO L93 Difference]: Finished difference Result 756 states and 1202 transitions. [2023-04-03 02:53:20,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-03 02:53:20,844 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 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 84 [2023-04-03 02:53:20,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:53:20,863 INFO L225 Difference]: With dead ends: 756 [2023-04-03 02:53:20,864 INFO L226 Difference]: Without dead ends: 634 [2023-04-03 02:53:20,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-04-03 02:53:20,873 INFO L413 NwaCegarLoop]: 513 mSDtfsCounter, 965 mSDsluCounter, 1361 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 965 SdHoareTripleChecker+Valid, 1874 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:53:20,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [965 Valid, 1874 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 02:53:20,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2023-04-03 02:53:21,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 624. [2023-04-03 02:53:21,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 620 states have (on average 1.4161290322580644) internal successors, (878), 620 states have internal predecessors, (878), 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) [2023-04-03 02:53:21,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 881 transitions. [2023-04-03 02:53:21,061 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 881 transitions. Word has length 84 [2023-04-03 02:53:21,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:53:21,062 INFO L495 AbstractCegarLoop]: Abstraction has 624 states and 881 transitions. [2023-04-03 02:53:21,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 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) [2023-04-03 02:53:21,062 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 881 transitions. [2023-04-03 02:53:21,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-04-03 02:53:21,072 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:53:21,072 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:53:21,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 02:53:21,073 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:53:21,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:53:21,074 INFO L85 PathProgramCache]: Analyzing trace with hash -182212770, now seen corresponding path program 1 times [2023-04-03 02:53:21,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:53:21,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040664895] [2023-04-03 02:53:21,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:53:21,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:53:21,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:53:21,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:53:21,302 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:53:21,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040664895] [2023-04-03 02:53:21,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040664895] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:53:21,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:53:21,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:53:21,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228079370] [2023-04-03 02:53:21,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:53:21,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:53:21,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:53:21,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:53:21,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:53:21,305 INFO L87 Difference]: Start difference. First operand 624 states and 881 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 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) [2023-04-03 02:53:21,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:53:21,704 INFO L93 Difference]: Finished difference Result 1543 states and 2241 transitions. [2023-04-03 02:53:21,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:53:21,705 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 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 85 [2023-04-03 02:53:21,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:53:21,710 INFO L225 Difference]: With dead ends: 1543 [2023-04-03 02:53:21,710 INFO L226 Difference]: Without dead ends: 985 [2023-04-03 02:53:21,713 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 [2023-04-03 02:53:21,714 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 659 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 659 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:53:21,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [659 Valid, 263 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:53:21,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2023-04-03 02:53:21,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 983. [2023-04-03 02:53:21,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 983 states, 979 states have (on average 1.4484167517875384) internal successors, (1418), 979 states have internal predecessors, (1418), 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) [2023-04-03 02:53:21,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 983 states to 983 states and 1421 transitions. [2023-04-03 02:53:21,915 INFO L78 Accepts]: Start accepts. Automaton has 983 states and 1421 transitions. Word has length 85 [2023-04-03 02:53:21,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:53:21,918 INFO L495 AbstractCegarLoop]: Abstraction has 983 states and 1421 transitions. [2023-04-03 02:53:21,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 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) [2023-04-03 02:53:21,918 INFO L276 IsEmpty]: Start isEmpty. Operand 983 states and 1421 transitions. [2023-04-03 02:53:21,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-04-03 02:53:21,921 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:53:21,921 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:53:21,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 02:53:21,921 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:53:21,922 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:53:21,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1328027025, now seen corresponding path program 1 times [2023-04-03 02:53:21,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:53:21,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663260674] [2023-04-03 02:53:21,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:53:21,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:53:21,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:53:22,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:53:22,069 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:53:22,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663260674] [2023-04-03 02:53:22,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663260674] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:53:22,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:53:22,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:53:22,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493308340] [2023-04-03 02:53:22,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:53:22,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:53:22,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:53:22,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:53:22,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:53:22,072 INFO L87 Difference]: Start difference. First operand 983 states and 1421 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 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) [2023-04-03 02:53:22,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:53:22,555 INFO L93 Difference]: Finished difference Result 2530 states and 3738 transitions. [2023-04-03 02:53:22,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:53:22,556 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 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 85 [2023-04-03 02:53:22,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:53:22,563 INFO L225 Difference]: With dead ends: 2530 [2023-04-03 02:53:22,563 INFO L226 Difference]: Without dead ends: 1703 [2023-04-03 02:53:22,565 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 [2023-04-03 02:53:22,566 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 620 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 620 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:53:22,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [620 Valid, 287 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:53:22,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2023-04-03 02:53:22,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 1701. [2023-04-03 02:53:22,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1701 states, 1697 states have (on average 1.4696523276370064) internal successors, (2494), 1697 states have internal predecessors, (2494), 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) [2023-04-03 02:53:22,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1701 states to 1701 states and 2497 transitions. [2023-04-03 02:53:22,825 INFO L78 Accepts]: Start accepts. Automaton has 1701 states and 2497 transitions. Word has length 85 [2023-04-03 02:53:22,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:53:22,826 INFO L495 AbstractCegarLoop]: Abstraction has 1701 states and 2497 transitions. [2023-04-03 02:53:22,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 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) [2023-04-03 02:53:22,826 INFO L276 IsEmpty]: Start isEmpty. Operand 1701 states and 2497 transitions. [2023-04-03 02:53:22,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-04-03 02:53:22,827 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:53:22,827 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:53:22,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 02:53:22,828 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:53:22,828 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:53:22,828 INFO L85 PathProgramCache]: Analyzing trace with hash 179201954, now seen corresponding path program 1 times [2023-04-03 02:53:22,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:53:22,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172629685] [2023-04-03 02:53:22,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:53:22,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:53:22,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:53:22,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:53:22,960 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:53:22,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172629685] [2023-04-03 02:53:22,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172629685] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:53:22,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:53:22,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:53:22,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424381266] [2023-04-03 02:53:22,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:53:22,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:53:22,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:53:22,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:53:22,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:53:22,962 INFO L87 Difference]: Start difference. First operand 1701 states and 2497 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 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) [2023-04-03 02:53:23,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:53:23,663 INFO L93 Difference]: Finished difference Result 4643 states and 6921 transitions. [2023-04-03 02:53:23,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:53:23,663 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 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 85 [2023-04-03 02:53:23,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:53:23,678 INFO L225 Difference]: With dead ends: 4643 [2023-04-03 02:53:23,678 INFO L226 Difference]: Without dead ends: 3139 [2023-04-03 02:53:23,681 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 [2023-04-03 02:53:23,688 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 638 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 638 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:53:23,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [638 Valid, 288 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:53:23,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3139 states. [2023-04-03 02:53:24,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3139 to 3137. [2023-04-03 02:53:24,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3137 states, 3133 states have (on average 1.4816469837216726) internal successors, (4642), 3133 states have internal predecessors, (4642), 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) [2023-04-03 02:53:24,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3137 states to 3137 states and 4645 transitions. [2023-04-03 02:53:24,124 INFO L78 Accepts]: Start accepts. Automaton has 3137 states and 4645 transitions. Word has length 85 [2023-04-03 02:53:24,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:53:24,125 INFO L495 AbstractCegarLoop]: Abstraction has 3137 states and 4645 transitions. [2023-04-03 02:53:24,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 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) [2023-04-03 02:53:24,125 INFO L276 IsEmpty]: Start isEmpty. Operand 3137 states and 4645 transitions. [2023-04-03 02:53:24,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-04-03 02:53:24,126 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:53:24,126 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:53:24,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 02:53:24,127 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:53:24,127 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:53:24,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1575923584, now seen corresponding path program 1 times [2023-04-03 02:53:24,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:53:24,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097364037] [2023-04-03 02:53:24,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:53:24,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:53:24,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:53:24,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:53:24,259 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:53:24,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097364037] [2023-04-03 02:53:24,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097364037] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:53:24,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:53:24,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:53:24,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909690224] [2023-04-03 02:53:24,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:53:24,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:53:24,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:53:24,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:53:24,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:53:24,261 INFO L87 Difference]: Start difference. First operand 3137 states and 4645 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 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) [2023-04-03 02:53:25,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:53:25,354 INFO L93 Difference]: Finished difference Result 9029 states and 13475 transitions. [2023-04-03 02:53:25,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:53:25,354 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 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 85 [2023-04-03 02:53:25,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:53:25,379 INFO L225 Difference]: With dead ends: 9029 [2023-04-03 02:53:25,379 INFO L226 Difference]: Without dead ends: 6011 [2023-04-03 02:53:25,385 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 [2023-04-03 02:53:25,385 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 619 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 619 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:53:25,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [619 Valid, 279 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:53:25,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6011 states. [2023-04-03 02:53:26,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6011 to 6009. [2023-04-03 02:53:26,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6009 states, 6005 states have (on average 1.4829308909242298) internal successors, (8905), 6005 states have internal predecessors, (8905), 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) [2023-04-03 02:53:26,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6009 states to 6009 states and 8908 transitions. [2023-04-03 02:53:26,217 INFO L78 Accepts]: Start accepts. Automaton has 6009 states and 8908 transitions. Word has length 85 [2023-04-03 02:53:26,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:53:26,218 INFO L495 AbstractCegarLoop]: Abstraction has 6009 states and 8908 transitions. [2023-04-03 02:53:26,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 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) [2023-04-03 02:53:26,218 INFO L276 IsEmpty]: Start isEmpty. Operand 6009 states and 8908 transitions. [2023-04-03 02:53:26,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-04-03 02:53:26,219 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:53:26,219 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:53:26,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 02:53:26,220 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:53:26,220 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:53:26,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1635939695, now seen corresponding path program 1 times [2023-04-03 02:53:26,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:53:26,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364538822] [2023-04-03 02:53:26,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:53:26,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:53:26,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:53:26,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:53:26,384 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:53:26,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364538822] [2023-04-03 02:53:26,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364538822] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:53:26,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:53:26,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:53:26,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556572353] [2023-04-03 02:53:26,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:53:26,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:53:26,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:53:26,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:53:26,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:53:26,386 INFO L87 Difference]: Start difference. First operand 6009 states and 8908 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 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) [2023-04-03 02:53:28,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:53:28,066 INFO L93 Difference]: Finished difference Result 17675 states and 26312 transitions. [2023-04-03 02:53:28,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:53:28,069 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 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 85 [2023-04-03 02:53:28,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:53:28,116 INFO L225 Difference]: With dead ends: 17675 [2023-04-03 02:53:28,116 INFO L226 Difference]: Without dead ends: 11755 [2023-04-03 02:53:28,129 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 [2023-04-03 02:53:28,130 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 624 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:53:28,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [624 Valid, 271 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:53:28,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11755 states. [2023-04-03 02:53:29,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11755 to 11753. [2023-04-03 02:53:29,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11753 states, 11749 states have (on average 1.4773172184866796) internal successors, (17357), 11749 states have internal predecessors, (17357), 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) [2023-04-03 02:53:29,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11753 states to 11753 states and 17360 transitions. [2023-04-03 02:53:29,950 INFO L78 Accepts]: Start accepts. Automaton has 11753 states and 17360 transitions. Word has length 85 [2023-04-03 02:53:29,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:53:29,950 INFO L495 AbstractCegarLoop]: Abstraction has 11753 states and 17360 transitions. [2023-04-03 02:53:29,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 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) [2023-04-03 02:53:29,951 INFO L276 IsEmpty]: Start isEmpty. Operand 11753 states and 17360 transitions. [2023-04-03 02:53:29,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-03 02:53:29,951 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:53:29,952 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:53:29,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-03 02:53:29,952 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:53:29,952 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:53:29,952 INFO L85 PathProgramCache]: Analyzing trace with hash 907203364, now seen corresponding path program 1 times [2023-04-03 02:53:29,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:53:29,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876609691] [2023-04-03 02:53:29,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:53:29,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:53:30,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:53:31,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:53:31,980 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:53:31,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876609691] [2023-04-03 02:53:31,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876609691] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:53:31,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:53:31,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-04-03 02:53:31,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460705708] [2023-04-03 02:53:31,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:53:31,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-03 02:53:31,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:53:31,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-03 02:53:31,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2023-04-03 02:53:31,982 INFO L87 Difference]: Start difference. First operand 11753 states and 17360 transitions. Second operand has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 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) [2023-04-03 02:53:36,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:53:36,696 INFO L93 Difference]: Finished difference Result 28514 states and 41961 transitions. [2023-04-03 02:53:36,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-03 02:53:36,697 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 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 86 [2023-04-03 02:53:36,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:53:36,789 INFO L225 Difference]: With dead ends: 28514 [2023-04-03 02:53:36,789 INFO L226 Difference]: Without dead ends: 28512 [2023-04-03 02:53:36,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=197, Invalid=733, Unknown=0, NotChecked=0, Total=930 [2023-04-03 02:53:36,806 INFO L413 NwaCegarLoop]: 297 mSDtfsCounter, 1193 mSDsluCounter, 2316 mSDsCounter, 0 mSdLazyCounter, 1291 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1193 SdHoareTripleChecker+Valid, 2613 SdHoareTripleChecker+Invalid, 1320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-03 02:53:36,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1193 Valid, 2613 Invalid, 1320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1291 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-03 02:53:36,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28512 states. [2023-04-03 02:53:39,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28512 to 20696. [2023-04-03 02:53:39,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20696 states, 20692 states have (on average 1.4709549584380437) internal successors, (30437), 20692 states have internal predecessors, (30437), 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) [2023-04-03 02:53:39,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20696 states to 20696 states and 30440 transitions. [2023-04-03 02:53:39,657 INFO L78 Accepts]: Start accepts. Automaton has 20696 states and 30440 transitions. Word has length 86 [2023-04-03 02:53:39,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:53:39,657 INFO L495 AbstractCegarLoop]: Abstraction has 20696 states and 30440 transitions. [2023-04-03 02:53:39,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 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) [2023-04-03 02:53:39,658 INFO L276 IsEmpty]: Start isEmpty. Operand 20696 states and 30440 transitions. [2023-04-03 02:53:39,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-03 02:53:39,659 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:53:39,659 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:53:39,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-03 02:53:39,659 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:53:39,660 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:53:39,660 INFO L85 PathProgramCache]: Analyzing trace with hash -776863228, now seen corresponding path program 1 times [2023-04-03 02:53:39,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:53:39,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066662468] [2023-04-03 02:53:39,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:53:39,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:53:39,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:53:41,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:53:41,392 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:53:41,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066662468] [2023-04-03 02:53:41,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066662468] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:53:41,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:53:41,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-04-03 02:53:41,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432536955] [2023-04-03 02:53:41,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:53:41,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-03 02:53:41,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:53:41,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-03 02:53:41,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2023-04-03 02:53:41,394 INFO L87 Difference]: Start difference. First operand 20696 states and 30440 transitions. Second operand has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 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) [2023-04-03 02:53:45,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:53:45,337 INFO L93 Difference]: Finished difference Result 27226 states and 39925 transitions. [2023-04-03 02:53:45,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-03 02:53:45,338 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 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 86 [2023-04-03 02:53:45,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:53:45,408 INFO L225 Difference]: With dead ends: 27226 [2023-04-03 02:53:45,408 INFO L226 Difference]: Without dead ends: 24984 [2023-04-03 02:53:45,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=199, Invalid=731, Unknown=0, NotChecked=0, Total=930 [2023-04-03 02:53:45,422 INFO L413 NwaCegarLoop]: 399 mSDtfsCounter, 1291 mSDsluCounter, 1464 mSDsCounter, 0 mSdLazyCounter, 937 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1291 SdHoareTripleChecker+Valid, 1863 SdHoareTripleChecker+Invalid, 981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-03 02:53:45,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1291 Valid, 1863 Invalid, 981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 937 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-03 02:53:45,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24984 states. [2023-04-03 02:53:48,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24984 to 22772. [2023-04-03 02:53:48,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22772 states, 22768 states have (on average 1.4687280393534785) internal successors, (33440), 22768 states have internal predecessors, (33440), 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) [2023-04-03 02:53:48,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22772 states to 22772 states and 33443 transitions. [2023-04-03 02:53:48,359 INFO L78 Accepts]: Start accepts. Automaton has 22772 states and 33443 transitions. Word has length 86 [2023-04-03 02:53:48,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:53:48,360 INFO L495 AbstractCegarLoop]: Abstraction has 22772 states and 33443 transitions. [2023-04-03 02:53:48,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 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) [2023-04-03 02:53:48,361 INFO L276 IsEmpty]: Start isEmpty. Operand 22772 states and 33443 transitions. [2023-04-03 02:53:48,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-03 02:53:48,362 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:53:48,362 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:53:48,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-03 02:53:48,362 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:53:48,363 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:53:48,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1178103388, now seen corresponding path program 1 times [2023-04-03 02:53:48,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:53:48,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163076056] [2023-04-03 02:53:48,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:53:48,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:53:48,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:53:49,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:53:49,891 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:53:49,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163076056] [2023-04-03 02:53:49,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163076056] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:53:49,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:53:49,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2023-04-03 02:53:49,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316316163] [2023-04-03 02:53:49,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:53:49,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-04-03 02:53:49,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:53:49,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-04-03 02:53:49,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2023-04-03 02:53:49,893 INFO L87 Difference]: Start difference. First operand 22772 states and 33443 transitions. Second operand has 22 states, 22 states have (on average 3.772727272727273) internal successors, (83), 22 states have internal predecessors, (83), 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) [2023-04-03 02:53:55,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:53:55,538 INFO L93 Difference]: Finished difference Result 36310 states and 53240 transitions. [2023-04-03 02:53:55,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-03 02:53:55,539 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.772727272727273) internal successors, (83), 22 states have internal predecessors, (83), 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 86 [2023-04-03 02:53:55,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:53:55,618 INFO L225 Difference]: With dead ends: 36310 [2023-04-03 02:53:55,619 INFO L226 Difference]: Without dead ends: 36308 [2023-04-03 02:53:55,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=254, Invalid=936, Unknown=0, NotChecked=0, Total=1190 [2023-04-03 02:53:55,636 INFO L413 NwaCegarLoop]: 415 mSDtfsCounter, 1202 mSDsluCounter, 3613 mSDsCounter, 0 mSdLazyCounter, 1696 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1202 SdHoareTripleChecker+Valid, 4028 SdHoareTripleChecker+Invalid, 1727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:53:55,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1202 Valid, 4028 Invalid, 1727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1696 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-03 02:53:55,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36308 states. [2023-04-03 02:53:59,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36308 to 22837. [2023-04-03 02:53:59,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22837 states, 22833 states have (on average 1.4679192396969298) internal successors, (33517), 22833 states have internal predecessors, (33517), 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) [2023-04-03 02:53:59,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22837 states to 22837 states and 33520 transitions. [2023-04-03 02:53:59,136 INFO L78 Accepts]: Start accepts. Automaton has 22837 states and 33520 transitions. Word has length 86 [2023-04-03 02:53:59,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:53:59,137 INFO L495 AbstractCegarLoop]: Abstraction has 22837 states and 33520 transitions. [2023-04-03 02:53:59,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.772727272727273) internal successors, (83), 22 states have internal predecessors, (83), 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) [2023-04-03 02:53:59,137 INFO L276 IsEmpty]: Start isEmpty. Operand 22837 states and 33520 transitions. [2023-04-03 02:53:59,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-03 02:53:59,141 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:53:59,141 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:53:59,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-03 02:53:59,144 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:53:59,144 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:53:59,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1935887772, now seen corresponding path program 1 times [2023-04-03 02:53:59,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:53:59,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235857745] [2023-04-03 02:53:59,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:53:59,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:53:59,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:54:00,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:54:00,617 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:54:00,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235857745] [2023-04-03 02:54:00,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235857745] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:54:00,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:54:00,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-04-03 02:54:00,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675564181] [2023-04-03 02:54:00,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:54:00,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-03 02:54:00,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:54:00,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-03 02:54:00,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2023-04-03 02:54:00,619 INFO L87 Difference]: Start difference. First operand 22837 states and 33520 transitions. Second operand has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 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) [2023-04-03 02:54:05,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:54:05,699 INFO L93 Difference]: Finished difference Result 32793 states and 48046 transitions. [2023-04-03 02:54:05,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-03 02:54:05,700 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 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 86 [2023-04-03 02:54:05,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:54:05,766 INFO L225 Difference]: With dead ends: 32793 [2023-04-03 02:54:05,766 INFO L226 Difference]: Without dead ends: 32791 [2023-04-03 02:54:05,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=197, Invalid=733, Unknown=0, NotChecked=0, Total=930 [2023-04-03 02:54:05,779 INFO L413 NwaCegarLoop]: 411 mSDtfsCounter, 1157 mSDsluCounter, 3369 mSDsCounter, 0 mSdLazyCounter, 1305 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1157 SdHoareTripleChecker+Valid, 3780 SdHoareTripleChecker+Invalid, 1333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-03 02:54:05,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1157 Valid, 3780 Invalid, 1333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1305 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-03 02:54:05,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32791 states. [2023-04-03 02:54:08,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32791 to 22860. [2023-04-03 02:54:09,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22860 states, 22856 states have (on average 1.4676671333566678) internal successors, (33545), 22856 states have internal predecessors, (33545), 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) [2023-04-03 02:54:09,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22860 states to 22860 states and 33548 transitions. [2023-04-03 02:54:09,054 INFO L78 Accepts]: Start accepts. Automaton has 22860 states and 33548 transitions. Word has length 86 [2023-04-03 02:54:09,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:54:09,054 INFO L495 AbstractCegarLoop]: Abstraction has 22860 states and 33548 transitions. [2023-04-03 02:54:09,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 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) [2023-04-03 02:54:09,054 INFO L276 IsEmpty]: Start isEmpty. Operand 22860 states and 33548 transitions. [2023-04-03 02:54:09,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-03 02:54:09,056 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:54:09,056 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:54:09,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-03 02:54:09,056 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:54:09,057 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:54:09,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1311834721, now seen corresponding path program 1 times [2023-04-03 02:54:09,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:54:09,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639499713] [2023-04-03 02:54:09,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:54:09,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:54:09,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:54:09,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:54:09,158 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:54:09,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639499713] [2023-04-03 02:54:09,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639499713] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:54:09,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:54:09,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:54:09,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635558353] [2023-04-03 02:54:09,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:54:09,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:54:09,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:54:09,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:54:09,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:54:09,161 INFO L87 Difference]: Start difference. First operand 22860 states and 33548 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) [2023-04-03 02:54:12,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:54:12,569 INFO L93 Difference]: Finished difference Result 34531 states and 50816 transitions. [2023-04-03 02:54:12,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:54:12,570 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 [2023-04-03 02:54:12,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:54:12,603 INFO L225 Difference]: With dead ends: 34531 [2023-04-03 02:54:12,604 INFO L226 Difference]: Without dead ends: 22860 [2023-04-03 02:54:12,628 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 [2023-04-03 02:54:12,628 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 529 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 529 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:54:12,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [529 Valid, 206 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:54:12,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22860 states. [2023-04-03 02:54:15,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22860 to 22860. [2023-04-03 02:54:15,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22860 states, 22856 states have (on average 1.4676233811690584) internal successors, (33544), 22856 states have internal predecessors, (33544), 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) [2023-04-03 02:54:15,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22860 states to 22860 states and 33547 transitions. [2023-04-03 02:54:15,971 INFO L78 Accepts]: Start accepts. Automaton has 22860 states and 33547 transitions. Word has length 86 [2023-04-03 02:54:15,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:54:15,971 INFO L495 AbstractCegarLoop]: Abstraction has 22860 states and 33547 transitions. [2023-04-03 02:54:15,971 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) [2023-04-03 02:54:15,971 INFO L276 IsEmpty]: Start isEmpty. Operand 22860 states and 33547 transitions. [2023-04-03 02:54:15,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-04-03 02:54:15,973 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:54:15,973 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:54:15,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-03 02:54:15,973 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:54:15,974 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:54:15,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1885300976, now seen corresponding path program 1 times [2023-04-03 02:54:15,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:54:15,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598359061] [2023-04-03 02:54:15,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:54:15,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:54:16,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:54:17,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:54:17,535 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:54:17,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598359061] [2023-04-03 02:54:17,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598359061] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:54:17,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:54:17,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-04-03 02:54:17,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141072381] [2023-04-03 02:54:17,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:54:17,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-03 02:54:17,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:54:17,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-03 02:54:17,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2023-04-03 02:54:17,536 INFO L87 Difference]: Start difference. First operand 22860 states and 33547 transitions. Second operand has 20 states, 20 states have (on average 4.2) internal successors, (84), 20 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) [2023-04-03 02:54:24,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:54:24,787 INFO L93 Difference]: Finished difference Result 44382 states and 65258 transitions. [2023-04-03 02:54:24,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-03 02:54:24,788 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.2) internal successors, (84), 20 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 [2023-04-03 02:54:24,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:54:24,861 INFO L225 Difference]: With dead ends: 44382 [2023-04-03 02:54:24,861 INFO L226 Difference]: Without dead ends: 44380 [2023-04-03 02:54:24,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=197, Invalid=733, Unknown=0, NotChecked=0, Total=930 [2023-04-03 02:54:24,875 INFO L413 NwaCegarLoop]: 411 mSDtfsCounter, 1033 mSDsluCounter, 2812 mSDsCounter, 0 mSdLazyCounter, 1606 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1033 SdHoareTripleChecker+Valid, 3223 SdHoareTripleChecker+Invalid, 1634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-03 02:54:24,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1033 Valid, 3223 Invalid, 1634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1606 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-03 02:54:24,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44380 states. [2023-04-03 02:54:29,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44380 to 25464. [2023-04-03 02:54:29,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25464 states, 25460 states have (on average 1.4691673212882954) internal successors, (37405), 25460 states have internal predecessors, (37405), 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) [2023-04-03 02:54:29,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25464 states to 25464 states and 37408 transitions. [2023-04-03 02:54:29,267 INFO L78 Accepts]: Start accepts. Automaton has 25464 states and 37408 transitions. Word has length 87 [2023-04-03 02:54:29,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:54:29,267 INFO L495 AbstractCegarLoop]: Abstraction has 25464 states and 37408 transitions. [2023-04-03 02:54:29,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.2) internal successors, (84), 20 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) [2023-04-03 02:54:29,268 INFO L276 IsEmpty]: Start isEmpty. Operand 25464 states and 37408 transitions. [2023-04-03 02:54:29,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-04-03 02:54:29,269 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:54:29,269 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:54:29,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-03 02:54:29,269 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:54:29,270 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:54:29,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1673289585, now seen corresponding path program 1 times [2023-04-03 02:54:29,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:54:29,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501979557] [2023-04-03 02:54:29,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:54:29,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:54:29,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:54:31,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:54:31,381 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:54:31,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501979557] [2023-04-03 02:54:31,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501979557] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:54:31,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:54:31,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2023-04-03 02:54:31,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491956815] [2023-04-03 02:54:31,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:54:31,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-04-03 02:54:31,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:54:31,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-04-03 02:54:31,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2023-04-03 02:54:31,383 INFO L87 Difference]: Start difference. First operand 25464 states and 37408 transitions. Second operand has 27 states, 27 states have (on average 3.1481481481481484) internal successors, (85), 26 states have internal predecessors, (85), 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) [2023-04-03 02:54:40,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:54:40,762 INFO L93 Difference]: Finished difference Result 51903 states and 76124 transitions. [2023-04-03 02:54:40,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-03 02:54:40,763 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.1481481481481484) internal successors, (85), 26 states have internal predecessors, (85), 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 88 [2023-04-03 02:54:40,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:54:40,846 INFO L225 Difference]: With dead ends: 51903 [2023-04-03 02:54:40,846 INFO L226 Difference]: Without dead ends: 47421 [2023-04-03 02:54:40,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=387, Invalid=1593, Unknown=0, NotChecked=0, Total=1980 [2023-04-03 02:54:40,874 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 1946 mSDsluCounter, 2084 mSDsCounter, 0 mSdLazyCounter, 2659 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1946 SdHoareTripleChecker+Valid, 2292 SdHoareTripleChecker+Invalid, 2698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 2659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-04-03 02:54:40,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1946 Valid, 2292 Invalid, 2698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 2659 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-04-03 02:54:40,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47421 states. [2023-04-03 02:54:46,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47421 to 31129. [2023-04-03 02:54:46,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31129 states, 31125 states have (on average 1.4662489959839358) internal successors, (45637), 31125 states have internal predecessors, (45637), 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) [2023-04-03 02:54:46,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31129 states to 31129 states and 45640 transitions. [2023-04-03 02:54:46,589 INFO L78 Accepts]: Start accepts. Automaton has 31129 states and 45640 transitions. Word has length 88 [2023-04-03 02:54:46,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:54:46,589 INFO L495 AbstractCegarLoop]: Abstraction has 31129 states and 45640 transitions. [2023-04-03 02:54:46,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.1481481481481484) internal successors, (85), 26 states have internal predecessors, (85), 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) [2023-04-03 02:54:46,590 INFO L276 IsEmpty]: Start isEmpty. Operand 31129 states and 45640 transitions. [2023-04-03 02:54:46,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-04-03 02:54:46,591 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:54:46,591 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:54:46,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-03 02:54:46,592 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:54:46,592 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:54:46,592 INFO L85 PathProgramCache]: Analyzing trace with hash -2074529745, now seen corresponding path program 1 times [2023-04-03 02:54:46,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:54:46,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104413216] [2023-04-03 02:54:46,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:54:46,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:54:46,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:54:49,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:54:49,026 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:54:49,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104413216] [2023-04-03 02:54:49,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104413216] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:54:49,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:54:49,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2023-04-03 02:54:49,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238155830] [2023-04-03 02:54:49,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:54:49,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-04-03 02:54:49,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:54:49,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-04-03 02:54:49,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2023-04-03 02:54:49,028 INFO L87 Difference]: Start difference. First operand 31129 states and 45640 transitions. Second operand has 29 states, 29 states have (on average 2.9310344827586206) internal successors, (85), 28 states have internal predecessors, (85), 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) [2023-04-03 02:54:57,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:54:57,943 INFO L93 Difference]: Finished difference Result 37696 states and 55064 transitions. [2023-04-03 02:54:57,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-04-03 02:54:57,943 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.9310344827586206) internal successors, (85), 28 states have internal predecessors, (85), 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 88 [2023-04-03 02:54:57,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:54:58,009 INFO L225 Difference]: With dead ends: 37696 [2023-04-03 02:54:58,009 INFO L226 Difference]: Without dead ends: 37694 [2023-04-03 02:54:58,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=555, Invalid=2201, Unknown=0, NotChecked=0, Total=2756 [2023-04-03 02:54:58,022 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 2427 mSDsluCounter, 2290 mSDsCounter, 0 mSdLazyCounter, 2944 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2427 SdHoareTripleChecker+Valid, 2520 SdHoareTripleChecker+Invalid, 2995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 2944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-04-03 02:54:58,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2427 Valid, 2520 Invalid, 2995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 2944 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-04-03 02:54:58,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37694 states. [2023-04-03 02:55:03,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37694 to 31135. [2023-04-03 02:55:03,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31135 states, 31131 states have (on average 1.466223378625807) internal successors, (45645), 31131 states have internal predecessors, (45645), 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) [2023-04-03 02:55:03,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31135 states to 31135 states and 45648 transitions. [2023-04-03 02:55:03,747 INFO L78 Accepts]: Start accepts. Automaton has 31135 states and 45648 transitions. Word has length 88 [2023-04-03 02:55:03,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:55:03,747 INFO L495 AbstractCegarLoop]: Abstraction has 31135 states and 45648 transitions. [2023-04-03 02:55:03,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.9310344827586206) internal successors, (85), 28 states have internal predecessors, (85), 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) [2023-04-03 02:55:03,747 INFO L276 IsEmpty]: Start isEmpty. Operand 31135 states and 45648 transitions. [2023-04-03 02:55:03,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-04-03 02:55:03,748 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:55:03,748 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:55:03,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-03 02:55:03,749 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:55:03,749 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:55:03,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1462653167, now seen corresponding path program 1 times [2023-04-03 02:55:03,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:55:03,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864367692] [2023-04-03 02:55:03,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:55:03,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:55:03,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:55:05,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:55:05,768 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:55:05,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864367692] [2023-04-03 02:55:05,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864367692] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:55:05,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:55:05,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2023-04-03 02:55:05,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018195365] [2023-04-03 02:55:05,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:55:05,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-04-03 02:55:05,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:55:05,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-04-03 02:55:05,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2023-04-03 02:55:05,770 INFO L87 Difference]: Start difference. First operand 31135 states and 45648 transitions. Second operand has 27 states, 27 states have (on average 3.1481481481481484) internal successors, (85), 26 states have internal predecessors, (85), 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) [2023-04-03 02:55:17,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:55:17,890 INFO L93 Difference]: Finished difference Result 54879 states and 80324 transitions. [2023-04-03 02:55:17,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-03 02:55:17,891 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.1481481481481484) internal successors, (85), 26 states have internal predecessors, (85), 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 88 [2023-04-03 02:55:17,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:55:18,002 INFO L225 Difference]: With dead ends: 54879 [2023-04-03 02:55:18,002 INFO L226 Difference]: Without dead ends: 54877 [2023-04-03 02:55:18,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=385, Invalid=1595, Unknown=0, NotChecked=0, Total=1980 [2023-04-03 02:55:18,023 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 1865 mSDsluCounter, 2657 mSDsCounter, 0 mSdLazyCounter, 3222 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1865 SdHoareTripleChecker+Valid, 2873 SdHoareTripleChecker+Invalid, 3257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 3222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-04-03 02:55:18,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1865 Valid, 2873 Invalid, 3257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 3222 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-04-03 02:55:18,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54877 states. [2023-04-03 02:55:24,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54877 to 31158. [2023-04-03 02:55:24,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31158 states, 31154 states have (on average 1.4660396738781536) internal successors, (45673), 31154 states have internal predecessors, (45673), 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) [2023-04-03 02:55:24,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31158 states to 31158 states and 45676 transitions. [2023-04-03 02:55:24,685 INFO L78 Accepts]: Start accepts. Automaton has 31158 states and 45676 transitions. Word has length 88 [2023-04-03 02:55:24,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:55:24,686 INFO L495 AbstractCegarLoop]: Abstraction has 31158 states and 45676 transitions. [2023-04-03 02:55:24,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.1481481481481484) internal successors, (85), 26 states have internal predecessors, (85), 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) [2023-04-03 02:55:24,686 INFO L276 IsEmpty]: Start isEmpty. Operand 31158 states and 45676 transitions. [2023-04-03 02:55:24,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-04-03 02:55:24,687 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:55:24,688 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:55:24,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-04-03 02:55:24,688 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:55:24,688 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:55:24,688 INFO L85 PathProgramCache]: Analyzing trace with hash 364986703, now seen corresponding path program 1 times [2023-04-03 02:55:24,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:55:24,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539500049] [2023-04-03 02:55:24,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:55:24,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:55:24,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:55:26,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:55:26,304 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:55:26,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539500049] [2023-04-03 02:55:26,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539500049] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:55:26,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:55:26,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2023-04-03 02:55:26,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735828702] [2023-04-03 02:55:26,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:55:26,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-03 02:55:26,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:55:26,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-03 02:55:26,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2023-04-03 02:55:26,306 INFO L87 Difference]: Start difference. First operand 31158 states and 45676 transitions. Second operand has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 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) [2023-04-03 02:55:37,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:55:37,317 INFO L93 Difference]: Finished difference Result 51857 states and 75929 transitions. [2023-04-03 02:55:37,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-03 02:55:37,317 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 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 88 [2023-04-03 02:55:37,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:55:37,422 INFO L225 Difference]: With dead ends: 51857 [2023-04-03 02:55:37,423 INFO L226 Difference]: Without dead ends: 51855 [2023-04-03 02:55:37,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=225, Invalid=831, Unknown=0, NotChecked=0, Total=1056 [2023-04-03 02:55:37,439 INFO L413 NwaCegarLoop]: 425 mSDtfsCounter, 1199 mSDsluCounter, 3326 mSDsCounter, 0 mSdLazyCounter, 1500 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1199 SdHoareTripleChecker+Valid, 3751 SdHoareTripleChecker+Invalid, 1531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-03 02:55:37,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1199 Valid, 3751 Invalid, 1531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1500 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-03 02:55:37,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51855 states. [2023-04-03 02:55:44,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51855 to 31173. [2023-04-03 02:55:44,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31173 states, 31169 states have (on average 1.4660078924572493) internal successors, (45694), 31169 states have internal predecessors, (45694), 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) [2023-04-03 02:55:44,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31173 states to 31173 states and 45697 transitions. [2023-04-03 02:55:44,253 INFO L78 Accepts]: Start accepts. Automaton has 31173 states and 45697 transitions. Word has length 88 [2023-04-03 02:55:44,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:55:44,254 INFO L495 AbstractCegarLoop]: Abstraction has 31173 states and 45697 transitions. [2023-04-03 02:55:44,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 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) [2023-04-03 02:55:44,254 INFO L276 IsEmpty]: Start isEmpty. Operand 31173 states and 45697 transitions. [2023-04-03 02:55:44,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-04-03 02:55:44,255 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:55:44,255 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:55:44,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-04-03 02:55:44,255 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:55:44,256 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:55:44,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1259854065, now seen corresponding path program 1 times [2023-04-03 02:55:44,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:55:44,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350773253] [2023-04-03 02:55:44,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:55:44,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:55:44,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:55:46,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:55:46,556 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:55:46,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350773253] [2023-04-03 02:55:46,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350773253] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:55:46,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:55:46,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2023-04-03 02:55:46,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950245733] [2023-04-03 02:55:46,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:55:46,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-04-03 02:55:46,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:55:46,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-04-03 02:55:46,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2023-04-03 02:55:46,558 INFO L87 Difference]: Start difference. First operand 31173 states and 45697 transitions. Second operand has 29 states, 29 states have (on average 2.9310344827586206) internal successors, (85), 28 states have internal predecessors, (85), 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) [2023-04-03 02:55:56,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:55:56,909 INFO L93 Difference]: Finished difference Result 35467 states and 51862 transitions. [2023-04-03 02:55:56,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-04-03 02:55:56,910 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.9310344827586206) internal successors, (85), 28 states have internal predecessors, (85), 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 88 [2023-04-03 02:55:56,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:55:56,968 INFO L225 Difference]: With dead ends: 35467 [2023-04-03 02:55:56,969 INFO L226 Difference]: Without dead ends: 35465 [2023-04-03 02:55:56,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=501, Invalid=2049, Unknown=0, NotChecked=0, Total=2550 [2023-04-03 02:55:56,980 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 1640 mSDsluCounter, 1995 mSDsCounter, 0 mSdLazyCounter, 2826 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1640 SdHoareTripleChecker+Valid, 2231 SdHoareTripleChecker+Invalid, 2865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 2826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-04-03 02:55:56,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1640 Valid, 2231 Invalid, 2865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 2826 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-04-03 02:55:57,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35465 states. [2023-04-03 02:56:03,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35465 to 31198. [2023-04-03 02:56:03,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31198 states, 31194 states have (on average 1.4658267615567095) internal successors, (45725), 31194 states have internal predecessors, (45725), 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) [2023-04-03 02:56:03,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31198 states to 31198 states and 45728 transitions. [2023-04-03 02:56:03,762 INFO L78 Accepts]: Start accepts. Automaton has 31198 states and 45728 transitions. Word has length 88 [2023-04-03 02:56:03,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:56:03,762 INFO L495 AbstractCegarLoop]: Abstraction has 31198 states and 45728 transitions. [2023-04-03 02:56:03,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.9310344827586206) internal successors, (85), 28 states have internal predecessors, (85), 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) [2023-04-03 02:56:03,762 INFO L276 IsEmpty]: Start isEmpty. Operand 31198 states and 45728 transitions. [2023-04-03 02:56:03,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-04-03 02:56:03,764 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:56:03,764 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:56:03,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-04-03 02:56:03,764 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:56:03,765 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:56:03,765 INFO L85 PathProgramCache]: Analyzing trace with hash 2010296271, now seen corresponding path program 1 times [2023-04-03 02:56:03,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:56:03,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037882207] [2023-04-03 02:56:03,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:56:03,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:56:03,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:56:05,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:56:05,164 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:56:05,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037882207] [2023-04-03 02:56:05,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037882207] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:56:05,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:56:05,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2023-04-03 02:56:05,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905154718] [2023-04-03 02:56:05,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:56:05,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-03 02:56:05,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:56:05,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-03 02:56:05,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2023-04-03 02:56:05,166 INFO L87 Difference]: Start difference. First operand 31198 states and 45728 transitions. Second operand has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 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) [2023-04-03 02:56:13,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:56:13,915 INFO L93 Difference]: Finished difference Result 39816 states and 58227 transitions. [2023-04-03 02:56:13,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-03 02:56:13,915 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 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 88 [2023-04-03 02:56:13,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:56:13,977 INFO L225 Difference]: With dead ends: 39816 [2023-04-03 02:56:13,977 INFO L226 Difference]: Without dead ends: 37574 [2023-04-03 02:56:13,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=227, Invalid=829, Unknown=0, NotChecked=0, Total=1056 [2023-04-03 02:56:13,990 INFO L413 NwaCegarLoop]: 406 mSDtfsCounter, 1049 mSDsluCounter, 2559 mSDsCounter, 0 mSdLazyCounter, 1087 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1049 SdHoareTripleChecker+Valid, 2965 SdHoareTripleChecker+Invalid, 1116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-03 02:56:13,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1049 Valid, 2965 Invalid, 1116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1087 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-03 02:56:14,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37574 states. [2023-04-03 02:56:20,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37574 to 31210. [2023-04-03 02:56:20,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31210 states, 31206 states have (on average 1.4657117221047236) internal successors, (45739), 31206 states have internal predecessors, (45739), 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) [2023-04-03 02:56:20,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31210 states to 31210 states and 45742 transitions. [2023-04-03 02:56:20,765 INFO L78 Accepts]: Start accepts. Automaton has 31210 states and 45742 transitions. Word has length 88 [2023-04-03 02:56:20,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:56:20,765 INFO L495 AbstractCegarLoop]: Abstraction has 31210 states and 45742 transitions. [2023-04-03 02:56:20,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 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) [2023-04-03 02:56:20,765 INFO L276 IsEmpty]: Start isEmpty. Operand 31210 states and 45742 transitions. [2023-04-03 02:56:20,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-04-03 02:56:20,767 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:56:20,767 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:56:20,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-04-03 02:56:20,767 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:56:20,767 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:56:20,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1609056111, now seen corresponding path program 1 times [2023-04-03 02:56:20,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:56:20,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725861090] [2023-04-03 02:56:20,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:56:20,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:56:20,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:56:22,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:56:22,007 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:56:22,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725861090] [2023-04-03 02:56:22,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725861090] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:56:22,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:56:22,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2023-04-03 02:56:22,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427925149] [2023-04-03 02:56:22,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:56:22,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-03 02:56:22,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:56:22,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-03 02:56:22,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2023-04-03 02:56:22,009 INFO L87 Difference]: Start difference. First operand 31210 states and 45742 transitions. Second operand has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 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) [2023-04-03 02:56:32,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:56:32,902 INFO L93 Difference]: Finished difference Result 46473 states and 67980 transitions. [2023-04-03 02:56:32,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-03 02:56:32,903 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 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 88 [2023-04-03 02:56:32,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:56:32,975 INFO L225 Difference]: With dead ends: 46473 [2023-04-03 02:56:32,976 INFO L226 Difference]: Without dead ends: 46471 [2023-04-03 02:56:32,987 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 [2023-04-03 02:56:32,988 INFO L413 NwaCegarLoop]: 405 mSDtfsCounter, 1218 mSDsluCounter, 3326 mSDsCounter, 0 mSdLazyCounter, 1156 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1218 SdHoareTripleChecker+Valid, 3731 SdHoareTripleChecker+Invalid, 1194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-03 02:56:32,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1218 Valid, 3731 Invalid, 1194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1156 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-03 02:56:33,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46471 states. [2023-04-03 02:56:39,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46471 to 31218. [2023-04-03 02:56:39,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31218 states, 31214 states have (on average 1.4656884731210353) internal successors, (45750), 31214 states have internal predecessors, (45750), 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) [2023-04-03 02:56:40,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31218 states to 31218 states and 45753 transitions. [2023-04-03 02:56:40,016 INFO L78 Accepts]: Start accepts. Automaton has 31218 states and 45753 transitions. Word has length 88 [2023-04-03 02:56:40,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:56:40,016 INFO L495 AbstractCegarLoop]: Abstraction has 31218 states and 45753 transitions. [2023-04-03 02:56:40,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 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) [2023-04-03 02:56:40,016 INFO L276 IsEmpty]: Start isEmpty. Operand 31218 states and 45753 transitions. [2023-04-03 02:56:40,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-04-03 02:56:40,018 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:56:40,018 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:56:40,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-04-03 02:56:40,018 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:56:40,019 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:56:40,019 INFO L85 PathProgramCache]: Analyzing trace with hash -580188113, now seen corresponding path program 1 times [2023-04-03 02:56:40,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:56:40,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645667883] [2023-04-03 02:56:40,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:56:40,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:56:40,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:56:41,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:56:41,247 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:56:41,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645667883] [2023-04-03 02:56:41,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645667883] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:56:41,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:56:41,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2023-04-03 02:56:41,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464741188] [2023-04-03 02:56:41,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:56:41,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-03 02:56:41,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:56:41,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-03 02:56:41,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2023-04-03 02:56:41,248 INFO L87 Difference]: Start difference. First operand 31218 states and 45753 transitions. Second operand has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 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) [2023-04-03 02:56:53,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:56:53,271 INFO L93 Difference]: Finished difference Result 54677 states and 79986 transitions. [2023-04-03 02:56:53,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-03 02:56:53,272 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 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 88 [2023-04-03 02:56:53,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:56:53,362 INFO L225 Difference]: With dead ends: 54677 [2023-04-03 02:56:53,362 INFO L226 Difference]: Without dead ends: 50195 [2023-04-03 02:56:53,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=226, Invalid=830, Unknown=0, NotChecked=0, Total=1056 [2023-04-03 02:56:53,377 INFO L413 NwaCegarLoop]: 399 mSDtfsCounter, 1232 mSDsluCounter, 2066 mSDsCounter, 0 mSdLazyCounter, 1172 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1232 SdHoareTripleChecker+Valid, 2465 SdHoareTripleChecker+Invalid, 1207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-03 02:56:53,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1232 Valid, 2465 Invalid, 1207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1172 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-03 02:56:53,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50195 states. [2023-04-03 02:57:00,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50195 to 31231. [2023-04-03 02:57:00,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31231 states, 31227 states have (on average 1.465590674736606) internal successors, (45766), 31227 states have internal predecessors, (45766), 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) [2023-04-03 02:57:00,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31231 states to 31231 states and 45769 transitions. [2023-04-03 02:57:00,820 INFO L78 Accepts]: Start accepts. Automaton has 31231 states and 45769 transitions. Word has length 88 [2023-04-03 02:57:00,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:57:00,820 INFO L495 AbstractCegarLoop]: Abstraction has 31231 states and 45769 transitions. [2023-04-03 02:57:00,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 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) [2023-04-03 02:57:00,820 INFO L276 IsEmpty]: Start isEmpty. Operand 31231 states and 45769 transitions. [2023-04-03 02:57:00,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-04-03 02:57:00,822 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:57:00,822 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:57:00,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-04-03 02:57:00,822 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:57:00,823 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:57:00,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1739212657, now seen corresponding path program 1 times [2023-04-03 02:57:00,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:57:00,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132888549] [2023-04-03 02:57:00,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:57:00,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:57:00,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:57:02,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:57:02,440 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:57:02,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132888549] [2023-04-03 02:57:02,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132888549] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:57:02,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:57:02,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2023-04-03 02:57:02,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107732713] [2023-04-03 02:57:02,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:57:02,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-03 02:57:02,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:57:02,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-03 02:57:02,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2023-04-03 02:57:02,441 INFO L87 Difference]: Start difference. First operand 31231 states and 45769 transitions. Second operand has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 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)