/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/systemc/token_ring.06.cil-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 06:09:54,534 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 06:09:54,536 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 06:09:54,592 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 06:09:54,593 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 06:09:54,595 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 06:09:54,599 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 06:09:54,617 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 06:09:54,619 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 06:09:54,623 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 06:09:54,625 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 06:09:54,626 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 06:09:54,626 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 06:09:54,629 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 06:09:54,630 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 06:09:54,633 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 06:09:54,634 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 06:09:54,634 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 06:09:54,636 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 06:09:54,640 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 06:09:54,641 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 06:09:54,642 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 06:09:54,643 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 06:09:54,644 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 06:09:54,652 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 06:09:54,652 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 06:09:54,652 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 06:09:54,665 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 06:09:54,666 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 06:09:54,666 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 06:09:54,667 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 06:09:54,668 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 06:09:54,669 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 06:09:54,669 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 06:09:54,670 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 06:09:54,670 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 06:09:54,670 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 06:09:54,670 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 06:09:54,671 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 06:09:54,671 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 06:09:54,672 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 06:09:54,674 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 06:09:54,716 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 06:09:54,717 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 06:09:54,717 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 06:09:54,717 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 06:09:54,733 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 06:09:54,733 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 06:09:54,734 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 06:09:54,734 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 06:09:54,734 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 06:09:54,734 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 06:09:54,735 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 06:09:54,735 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 06:09:54,735 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 06:09:54,735 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 06:09:54,735 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 06:09:54,735 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 06:09:54,736 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 06:09:54,736 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 06:09:54,736 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 06:09:54,736 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 06:09:54,736 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 06:09:54,737 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 06:09:54,737 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 06:09:54,737 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 06:09:54,737 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 06:09:54,737 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 06:09:54,737 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 06:09:54,737 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 06:09:54,737 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 06:09:54,737 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 06:09:54,738 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 06:09:54,738 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 06:09:54,738 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:09:54,738 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 06:09:54,738 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 06:09:54,738 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 06:09:54,738 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 06:09:54,738 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 06:09:54,739 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 06:09:54,739 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 06:09:54,739 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 06:09:54,739 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 06:09:55,143 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 06:09:55,188 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 06:09:55,190 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 06:09:55,191 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 06:09:55,192 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 06:09:55,193 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/token_ring.06.cil-1.c [2023-04-01 06:09:57,125 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 06:09:57,499 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 06:09:57,500 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.06.cil-1.c [2023-04-01 06:09:57,537 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/194d24055/e558fece458a437fb934deafa5070f06/FLAGf06500aa1 [2023-04-01 06:09:57,785 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/194d24055/e558fece458a437fb934deafa5070f06 [2023-04-01 06:09:57,788 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 06:09:57,789 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 06:09:57,817 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 06:09:57,817 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 06:09:57,821 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 06:09:57,822 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:09:57" (1/1) ... [2023-04-01 06:09:57,823 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@287c41c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:09:57, skipping insertion in model container [2023-04-01 06:09:57,823 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:09:57" (1/1) ... [2023-04-01 06:09:57,829 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 06:09:57,905 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 06:09:58,143 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/systemc/token_ring.06.cil-1.c[671,684] [2023-04-01 06:09:58,304 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:09:58,332 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 06:09:58,349 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/systemc/token_ring.06.cil-1.c[671,684] [2023-04-01 06:09:58,448 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:09:58,501 INFO L208 MainTranslator]: Completed translation [2023-04-01 06:09:58,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:09:58 WrapperNode [2023-04-01 06:09:58,501 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 06:09:58,503 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 06:09:58,503 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 06:09:58,503 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 06:09:58,515 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:09:58" (1/1) ... [2023-04-01 06:09:58,515 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:09:58" (1/1) ... [2023-04-01 06:09:58,554 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:09:58" (1/1) ... [2023-04-01 06:09:58,555 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:09:58" (1/1) ... [2023-04-01 06:09:58,584 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:09:58" (1/1) ... [2023-04-01 06:09:58,627 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:09:58" (1/1) ... [2023-04-01 06:09:58,630 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:09:58" (1/1) ... [2023-04-01 06:09:58,632 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:09:58" (1/1) ... [2023-04-01 06:09:58,635 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 06:09:58,636 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 06:09:58,648 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 06:09:58,649 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 06:09:58,650 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:09:58" (1/1) ... [2023-04-01 06:09:58,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:09:58,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:09:58,722 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 06:09:58,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 06:09:58,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 06:09:58,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 06:09:58,815 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 06:09:58,815 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2023-04-01 06:09:58,817 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2023-04-01 06:09:58,817 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2023-04-01 06:09:58,817 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit2 [2023-04-01 06:09:58,817 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit3 [2023-04-01 06:09:58,817 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit4 [2023-04-01 06:09:58,817 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit5 [2023-04-01 06:09:58,817 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit6 [2023-04-01 06:09:58,817 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2023-04-01 06:09:58,817 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2023-04-01 06:09:58,818 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit2_triggered [2023-04-01 06:09:58,818 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit3_triggered [2023-04-01 06:09:58,818 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit4_triggered [2023-04-01 06:09:58,818 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit5_triggered [2023-04-01 06:09:58,818 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit6_triggered [2023-04-01 06:09:58,818 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-04-01 06:09:58,818 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2023-04-01 06:09:58,818 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-04-01 06:09:58,818 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2023-04-01 06:09:58,818 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-04-01 06:09:58,819 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-04-01 06:09:58,819 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-04-01 06:09:58,819 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-04-01 06:09:58,819 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2023-04-01 06:09:58,819 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2023-04-01 06:09:58,819 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2023-04-01 06:09:58,819 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2023-04-01 06:09:58,819 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2023-04-01 06:09:58,819 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 06:09:58,819 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 06:09:58,819 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 06:09:58,820 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 06:09:58,820 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 06:09:58,820 INFO L130 BoogieDeclarations]: Found specification of procedure error [2023-04-01 06:09:58,820 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2023-04-01 06:09:58,820 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2023-04-01 06:09:58,820 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit2_triggered [2023-04-01 06:09:58,821 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit3_triggered [2023-04-01 06:09:58,821 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit4_triggered [2023-04-01 06:09:58,821 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit5_triggered [2023-04-01 06:09:58,821 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit6_triggered [2023-04-01 06:09:58,821 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-04-01 06:09:58,827 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 06:09:58,827 INFO L130 BoogieDeclarations]: Found specification of procedure master [2023-04-01 06:09:58,827 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2023-04-01 06:09:58,827 INFO L130 BoogieDeclarations]: Found specification of procedure transmit2 [2023-04-01 06:09:58,827 INFO L130 BoogieDeclarations]: Found specification of procedure transmit3 [2023-04-01 06:09:58,827 INFO L130 BoogieDeclarations]: Found specification of procedure transmit4 [2023-04-01 06:09:58,828 INFO L130 BoogieDeclarations]: Found specification of procedure transmit5 [2023-04-01 06:09:58,828 INFO L130 BoogieDeclarations]: Found specification of procedure transmit6 [2023-04-01 06:09:58,828 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-04-01 06:09:58,828 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2023-04-01 06:09:58,828 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-04-01 06:09:58,829 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2023-04-01 06:09:58,829 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-04-01 06:09:58,829 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-04-01 06:09:58,830 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-04-01 06:09:58,830 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2023-04-01 06:09:58,830 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2023-04-01 06:09:58,830 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2023-04-01 06:09:58,831 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2023-04-01 06:09:58,831 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2023-04-01 06:09:58,831 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 06:09:58,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 06:09:58,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 06:09:58,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 06:09:58,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 06:09:58,831 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 06:09:58,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 06:09:59,004 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 06:09:59,021 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 06:10:00,145 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 06:10:00,578 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 06:10:00,578 INFO L302 CfgBuilder]: Removed 9 assume(true) statements. [2023-04-01 06:10:00,593 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:10:00 BoogieIcfgContainer [2023-04-01 06:10:00,594 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 06:10:00,597 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 06:10:00,597 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 06:10:00,600 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 06:10:00,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 06:09:57" (1/3) ... [2023-04-01 06:10:00,614 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79cbb15f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:10:00, skipping insertion in model container [2023-04-01 06:10:00,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:09:58" (2/3) ... [2023-04-01 06:10:00,614 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79cbb15f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:10:00, skipping insertion in model container [2023-04-01 06:10:00,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:10:00" (3/3) ... [2023-04-01 06:10:00,615 INFO L112 eAbstractionObserver]: Analyzing ICFG token_ring.06.cil-1.c [2023-04-01 06:10:00,632 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 06:10:00,632 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 06:10:00,745 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 06:10:00,770 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;@3e089383, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 06:10:00,771 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 06:10:00,777 INFO L276 IsEmpty]: Start isEmpty. Operand has 198 states, 121 states have (on average 1.43801652892562) internal successors, (174), 133 states have internal predecessors, (174), 45 states have call successors, (45), 30 states have call predecessors, (45), 30 states have return successors, (45), 44 states have call predecessors, (45), 45 states have call successors, (45) [2023-04-01 06:10:00,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-04-01 06:10:00,796 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:10:00,797 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:10:00,798 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:10:00,818 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:10:00,818 INFO L85 PathProgramCache]: Analyzing trace with hash -878387871, now seen corresponding path program 1 times [2023-04-01 06:10:00,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:10:00,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597939488] [2023-04-01 06:10:00,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:10:00,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:10:01,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:10:02,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:10:02,296 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:10:02,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597939488] [2023-04-01 06:10:02,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597939488] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:10:02,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:10:02,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 06:10:02,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478089749] [2023-04-01 06:10:02,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:10:02,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 06:10:02,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:10:02,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 06:10:02,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 06:10:02,392 INFO L87 Difference]: Start difference. First operand has 198 states, 121 states have (on average 1.43801652892562) internal successors, (174), 133 states have internal predecessors, (174), 45 states have call successors, (45), 30 states have call predecessors, (45), 30 states have return successors, (45), 44 states have call predecessors, (45), 45 states have call successors, (45) Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 5 states have call successors, (20), 3 states have call predecessors, (20), 5 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2023-04-01 06:10:04,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:10:04,787 INFO L93 Difference]: Finished difference Result 1553 states and 2366 transitions. [2023-04-01 06:10:04,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 06:10:04,790 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 5 states have call successors, (20), 3 states have call predecessors, (20), 5 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 92 [2023-04-01 06:10:04,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:10:04,845 INFO L225 Difference]: With dead ends: 1553 [2023-04-01 06:10:04,846 INFO L226 Difference]: Without dead ends: 1323 [2023-04-01 06:10:04,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-04-01 06:10:04,879 INFO L413 NwaCegarLoop]: 570 mSDtfsCounter, 1861 mSDsluCounter, 859 mSDsCounter, 0 mSdLazyCounter, 1072 mSolverCounterSat, 723 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1877 SdHoareTripleChecker+Valid, 1429 SdHoareTripleChecker+Invalid, 1795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 723 IncrementalHoareTripleChecker+Valid, 1072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-04-01 06:10:04,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1877 Valid, 1429 Invalid, 1795 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [723 Valid, 1072 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-04-01 06:10:04,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1323 states. [2023-04-01 06:10:05,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1323 to 1303. [2023-04-01 06:10:05,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1303 states, 843 states have (on average 1.3914590747330962) internal successors, (1173), 904 states have internal predecessors, (1173), 275 states have call successors, (275), 196 states have call predecessors, (275), 184 states have return successors, (432), 257 states have call predecessors, (432), 271 states have call successors, (432) [2023-04-01 06:10:05,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1303 states to 1303 states and 1880 transitions. [2023-04-01 06:10:05,287 INFO L78 Accepts]: Start accepts. Automaton has 1303 states and 1880 transitions. Word has length 92 [2023-04-01 06:10:05,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:10:05,288 INFO L495 AbstractCegarLoop]: Abstraction has 1303 states and 1880 transitions. [2023-04-01 06:10:05,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 5 states have call successors, (20), 3 states have call predecessors, (20), 5 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2023-04-01 06:10:05,289 INFO L276 IsEmpty]: Start isEmpty. Operand 1303 states and 1880 transitions. [2023-04-01 06:10:05,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2023-04-01 06:10:05,310 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:10:05,325 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:10:05,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 06:10:05,325 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:10:05,326 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:10:05,327 INFO L85 PathProgramCache]: Analyzing trace with hash 182428119, now seen corresponding path program 1 times [2023-04-01 06:10:05,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:10:05,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667757528] [2023-04-01 06:10:05,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:10:05,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:10:05,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:10:05,824 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-04-01 06:10:05,825 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:10:05,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667757528] [2023-04-01 06:10:05,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667757528] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 06:10:05,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553509127] [2023-04-01 06:10:05,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:10:05,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:10:05,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:10:05,829 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 06:10:05,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 06:10:06,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:10:06,092 INFO L262 TraceCheckSpWp]: Trace formula consists of 1361 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-01 06:10:06,102 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 06:10:06,150 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-04-01 06:10:06,150 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 06:10:06,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553509127] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:10:06,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 06:10:06,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-01 06:10:06,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172626435] [2023-04-01 06:10:06,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:10:06,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:10:06,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:10:06,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:10:06,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:10:06,154 INFO L87 Difference]: Start difference. First operand 1303 states and 1880 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-04-01 06:10:06,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:10:06,429 INFO L93 Difference]: Finished difference Result 2738 states and 4118 transitions. [2023-04-01 06:10:06,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:10:06,430 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 168 [2023-04-01 06:10:06,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:10:06,440 INFO L225 Difference]: With dead ends: 2738 [2023-04-01 06:10:06,440 INFO L226 Difference]: Without dead ends: 1612 [2023-04-01 06:10:06,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:10:06,458 INFO L413 NwaCegarLoop]: 306 mSDtfsCounter, 90 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:10:06,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 528 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:10:06,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1612 states. [2023-04-01 06:10:06,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1612 to 1545. [2023-04-01 06:10:06,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1545 states, 1003 states have (on average 1.4287138584247259) internal successors, (1433), 1100 states have internal predecessors, (1433), 321 states have call successors, (321), 232 states have call predecessors, (321), 220 states have return successors, (579), 288 states have call predecessors, (579), 317 states have call successors, (579) [2023-04-01 06:10:06,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1545 states to 1545 states and 2333 transitions. [2023-04-01 06:10:06,695 INFO L78 Accepts]: Start accepts. Automaton has 1545 states and 2333 transitions. Word has length 168 [2023-04-01 06:10:06,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:10:06,696 INFO L495 AbstractCegarLoop]: Abstraction has 1545 states and 2333 transitions. [2023-04-01 06:10:06,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-04-01 06:10:06,697 INFO L276 IsEmpty]: Start isEmpty. Operand 1545 states and 2333 transitions. [2023-04-01 06:10:06,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2023-04-01 06:10:06,703 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:10:06,704 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:10:06,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 06:10:06,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:10:06,913 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:10:06,914 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:10:06,914 INFO L85 PathProgramCache]: Analyzing trace with hash -74565514, now seen corresponding path program 1 times [2023-04-01 06:10:06,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:10:06,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792278074] [2023-04-01 06:10:06,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:10:06,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:10:06,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:10:07,496 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 2 proven. 39 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2023-04-01 06:10:07,497 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:10:07,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792278074] [2023-04-01 06:10:07,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792278074] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 06:10:07,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047823529] [2023-04-01 06:10:07,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:10:07,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:10:07,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:10:07,520 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 06:10:07,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 06:10:07,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:10:07,987 INFO L262 TraceCheckSpWp]: Trace formula consists of 1608 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 06:10:08,002 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 06:10:08,151 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2023-04-01 06:10:08,152 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 06:10:08,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047823529] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:10:08,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 06:10:08,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-01 06:10:08,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080619387] [2023-04-01 06:10:08,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:10:08,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:10:08,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:10:08,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:10:08,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:10:08,155 INFO L87 Difference]: Start difference. First operand 1545 states and 2333 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 3 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (23), 2 states have call predecessors, (23), 3 states have call successors, (23) [2023-04-01 06:10:08,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:10:08,699 INFO L93 Difference]: Finished difference Result 4564 states and 7312 transitions. [2023-04-01 06:10:08,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:10:08,700 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 3 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (23), 2 states have call predecessors, (23), 3 states have call successors, (23) Word has length 230 [2023-04-01 06:10:08,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:10:08,736 INFO L225 Difference]: With dead ends: 4564 [2023-04-01 06:10:08,736 INFO L226 Difference]: Without dead ends: 3035 [2023-04-01 06:10:08,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:10:08,767 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 206 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 06:10:08,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 442 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 06:10:08,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3035 states. [2023-04-01 06:10:09,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3035 to 3019. [2023-04-01 06:10:09,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3019 states, 1972 states have (on average 1.4219066937119675) internal successors, (2804), 2150 states have internal predecessors, (2804), 621 states have call successors, (621), 458 states have call predecessors, (621), 425 states have return successors, (1157), 549 states have call predecessors, (1157), 617 states have call successors, (1157) [2023-04-01 06:10:09,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3019 states to 3019 states and 4582 transitions. [2023-04-01 06:10:09,280 INFO L78 Accepts]: Start accepts. Automaton has 3019 states and 4582 transitions. Word has length 230 [2023-04-01 06:10:09,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:10:09,293 INFO L495 AbstractCegarLoop]: Abstraction has 3019 states and 4582 transitions. [2023-04-01 06:10:09,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 3 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (23), 2 states have call predecessors, (23), 3 states have call successors, (23) [2023-04-01 06:10:09,296 INFO L276 IsEmpty]: Start isEmpty. Operand 3019 states and 4582 transitions. [2023-04-01 06:10:09,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2023-04-01 06:10:09,320 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:10:09,324 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:10:09,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 06:10:09,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-04-01 06:10:09,533 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:10:09,533 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:10:09,533 INFO L85 PathProgramCache]: Analyzing trace with hash -767457547, now seen corresponding path program 1 times [2023-04-01 06:10:09,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:10:09,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319675093] [2023-04-01 06:10:09,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:10:09,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:10:09,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:10:09,994 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 2 proven. 39 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2023-04-01 06:10:09,994 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:10:09,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319675093] [2023-04-01 06:10:09,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319675093] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 06:10:09,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568100505] [2023-04-01 06:10:09,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:10:09,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:10:09,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:10:09,996 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 06:10:09,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 06:10:10,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:10:10,244 INFO L262 TraceCheckSpWp]: Trace formula consists of 1599 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 06:10:10,251 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 06:10:10,318 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2023-04-01 06:10:10,318 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 06:10:10,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568100505] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:10:10,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 06:10:10,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-01 06:10:10,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244640144] [2023-04-01 06:10:10,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:10:10,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:10:10,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:10:10,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:10:10,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:10:10,320 INFO L87 Difference]: Start difference. First operand 3019 states and 4582 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 3 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (25), 2 states have call predecessors, (25), 3 states have call successors, (25) [2023-04-01 06:10:10,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:10:10,804 INFO L93 Difference]: Finished difference Result 8948 states and 14457 transitions. [2023-04-01 06:10:10,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:10:10,804 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 3 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (25), 2 states have call predecessors, (25), 3 states have call successors, (25) Word has length 230 [2023-04-01 06:10:10,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:10:10,851 INFO L225 Difference]: With dead ends: 8948 [2023-04-01 06:10:10,851 INFO L226 Difference]: Without dead ends: 5945 [2023-04-01 06:10:10,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:10:10,880 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 192 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:10:10,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 402 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:10:10,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5945 states. [2023-04-01 06:10:11,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5945 to 5917. [2023-04-01 06:10:11,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5917 states, 3882 states have (on average 1.4142194744976817) internal successors, (5490), 4208 states have internal predecessors, (5490), 1211 states have call successors, (1211), 910 states have call predecessors, (1211), 823 states have return successors, (2367), 1051 states have call predecessors, (2367), 1207 states have call successors, (2367) [2023-04-01 06:10:11,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5917 states to 5917 states and 9068 transitions. [2023-04-01 06:10:11,360 INFO L78 Accepts]: Start accepts. Automaton has 5917 states and 9068 transitions. Word has length 230 [2023-04-01 06:10:11,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:10:11,360 INFO L495 AbstractCegarLoop]: Abstraction has 5917 states and 9068 transitions. [2023-04-01 06:10:11,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 3 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (25), 2 states have call predecessors, (25), 3 states have call successors, (25) [2023-04-01 06:10:11,362 INFO L276 IsEmpty]: Start isEmpty. Operand 5917 states and 9068 transitions. [2023-04-01 06:10:11,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2023-04-01 06:10:11,375 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:10:11,375 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:10:11,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 06:10:11,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:10:11,583 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:10:11,583 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:10:11,583 INFO L85 PathProgramCache]: Analyzing trace with hash -978415692, now seen corresponding path program 1 times [2023-04-01 06:10:11,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:10:11,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938746302] [2023-04-01 06:10:11,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:10:11,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:10:11,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:10:12,055 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 2 proven. 39 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2023-04-01 06:10:12,056 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:10:12,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938746302] [2023-04-01 06:10:12,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938746302] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 06:10:12,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142717668] [2023-04-01 06:10:12,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:10:12,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:10:12,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:10:12,059 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 06:10:12,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 06:10:12,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:10:12,364 INFO L262 TraceCheckSpWp]: Trace formula consists of 1590 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 06:10:12,370 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 06:10:12,449 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-04-01 06:10:12,449 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 06:10:12,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142717668] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:10:12,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 06:10:12,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-01 06:10:12,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357928785] [2023-04-01 06:10:12,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:10:12,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:10:12,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:10:12,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:10:12,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:10:12,451 INFO L87 Difference]: Start difference. First operand 5917 states and 9068 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 3 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (27), 2 states have call predecessors, (27), 3 states have call successors, (27) [2023-04-01 06:10:13,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:10:13,140 INFO L93 Difference]: Finished difference Result 17566 states and 28852 transitions. [2023-04-01 06:10:13,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:10:13,141 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 3 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (27), 2 states have call predecessors, (27), 3 states have call successors, (27) Word has length 230 [2023-04-01 06:10:13,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:10:13,227 INFO L225 Difference]: With dead ends: 17566 [2023-04-01 06:10:13,227 INFO L226 Difference]: Without dead ends: 11665 [2023-04-01 06:10:13,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:10:13,275 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 178 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:10:13,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 402 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:10:13,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11665 states. [2023-04-01 06:10:13,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11665 to 11613. [2023-04-01 06:10:13,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11613 states, 7646 states have (on average 1.4059639026942192) internal successors, (10750), 8240 states have internal predecessors, (10750), 2371 states have call successors, (2371), 1814 states have call predecessors, (2371), 1595 states have return successors, (4991), 2015 states have call predecessors, (4991), 2367 states have call successors, (4991) [2023-04-01 06:10:14,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11613 states to 11613 states and 18112 transitions. [2023-04-01 06:10:14,059 INFO L78 Accepts]: Start accepts. Automaton has 11613 states and 18112 transitions. Word has length 230 [2023-04-01 06:10:14,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:10:14,059 INFO L495 AbstractCegarLoop]: Abstraction has 11613 states and 18112 transitions. [2023-04-01 06:10:14,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 3 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (27), 2 states have call predecessors, (27), 3 states have call successors, (27) [2023-04-01 06:10:14,060 INFO L276 IsEmpty]: Start isEmpty. Operand 11613 states and 18112 transitions. [2023-04-01 06:10:14,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2023-04-01 06:10:14,084 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:10:14,085 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:10:14,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 06:10:14,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:10:14,294 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:10:14,294 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:10:14,294 INFO L85 PathProgramCache]: Analyzing trace with hash -115835418, now seen corresponding path program 1 times [2023-04-01 06:10:14,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:10:14,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827209734] [2023-04-01 06:10:14,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:10:14,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:10:14,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:10:14,718 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2023-04-01 06:10:14,718 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:10:14,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827209734] [2023-04-01 06:10:14,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827209734] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:10:14,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:10:14,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:10:14,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067790182] [2023-04-01 06:10:14,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:10:14,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:10:14,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:10:14,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:10:14,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:10:14,721 INFO L87 Difference]: Start difference. First operand 11613 states and 18112 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 4 states have call successors, (26), 4 states have call predecessors, (26), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2023-04-01 06:10:17,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:10:17,900 INFO L93 Difference]: Finished difference Result 48386 states and 90566 transitions. [2023-04-01 06:10:17,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 06:10:17,901 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 4 states have call successors, (26), 4 states have call predecessors, (26), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 230 [2023-04-01 06:10:17,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:10:18,125 INFO L225 Difference]: With dead ends: 48386 [2023-04-01 06:10:18,125 INFO L226 Difference]: Without dead ends: 36789 [2023-04-01 06:10:18,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:10:18,345 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 635 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 667 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 1179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 06:10:18,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [667 Valid, 389 Invalid, 1179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 956 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 06:10:18,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36789 states. [2023-04-01 06:10:20,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36789 to 36429. [2023-04-01 06:10:20,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36429 states, 24558 states have (on average 1.4651844612753482) internal successors, (35982), 27440 states have internal predecessors, (35982), 7603 states have call successors, (7603), 4950 states have call predecessors, (7603), 4267 states have return successors, (21107), 5839 states have call predecessors, (21107), 7599 states have call successors, (21107) [2023-04-01 06:10:21,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36429 states to 36429 states and 64692 transitions. [2023-04-01 06:10:21,449 INFO L78 Accepts]: Start accepts. Automaton has 36429 states and 64692 transitions. Word has length 230 [2023-04-01 06:10:21,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:10:21,450 INFO L495 AbstractCegarLoop]: Abstraction has 36429 states and 64692 transitions. [2023-04-01 06:10:21,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 4 states have call successors, (26), 4 states have call predecessors, (26), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2023-04-01 06:10:21,451 INFO L276 IsEmpty]: Start isEmpty. Operand 36429 states and 64692 transitions. [2023-04-01 06:10:21,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2023-04-01 06:10:21,731 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:10:21,732 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:10:21,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 06:10:21,732 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:10:21,732 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:10:21,732 INFO L85 PathProgramCache]: Analyzing trace with hash 422610862, now seen corresponding path program 1 times [2023-04-01 06:10:21,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:10:21,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891274042] [2023-04-01 06:10:21,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:10:21,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:10:21,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:10:21,973 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2023-04-01 06:10:21,973 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:10:21,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891274042] [2023-04-01 06:10:21,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891274042] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:10:21,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:10:21,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:10:21,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67434708] [2023-04-01 06:10:21,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:10:21,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:10:21,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:10:21,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:10:21,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:10:21,975 INFO L87 Difference]: Start difference. First operand 36429 states and 64692 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 4 states have call successors, (26), 4 states have call predecessors, (26), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2023-04-01 06:10:39,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:10:39,456 INFO L93 Difference]: Finished difference Result 161980 states and 356145 transitions. [2023-04-01 06:10:39,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 06:10:39,457 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 4 states have call successors, (26), 4 states have call predecessors, (26), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 230 [2023-04-01 06:10:39,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:10:43,175 INFO L225 Difference]: With dead ends: 161980 [2023-04-01 06:10:43,175 INFO L226 Difference]: Without dead ends: 125567 [2023-04-01 06:10:44,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:10:44,825 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 608 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 984 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 638 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 1199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:10:44,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [638 Valid, 488 Invalid, 1199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 984 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-01 06:10:45,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125567 states. [2023-04-01 06:10:56,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125567 to 124527. [2023-04-01 06:10:57,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124527 states, 85196 states have (on average 1.5352363960749331) internal successors, (130796), 99522 states have internal predecessors, (130796), 27670 states have call successors, (27670), 13732 states have call predecessors, (27670), 11660 states have return successors, (100487), 18444 states have call predecessors, (100487), 27666 states have call successors, (100487) [2023-04-01 06:11:00,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124527 states to 124527 states and 258953 transitions. [2023-04-01 06:11:00,816 INFO L78 Accepts]: Start accepts. Automaton has 124527 states and 258953 transitions. Word has length 230 [2023-04-01 06:11:00,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:11:00,816 INFO L495 AbstractCegarLoop]: Abstraction has 124527 states and 258953 transitions. [2023-04-01 06:11:00,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 4 states have call successors, (26), 4 states have call predecessors, (26), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2023-04-01 06:11:00,817 INFO L276 IsEmpty]: Start isEmpty. Operand 124527 states and 258953 transitions. [2023-04-01 06:11:01,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2023-04-01 06:11:01,094 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:11:01,094 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:11:01,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 06:11:01,095 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:11:01,095 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:11:01,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1106112841, now seen corresponding path program 1 times [2023-04-01 06:11:01,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:11:01,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426119897] [2023-04-01 06:11:01,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:11:01,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:11:01,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat