./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/Problem05_label49+token_ring.05.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/Problem05_label49+token_ring.05.cil-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 211a040b667c92c6d715ed7462c0db91088ae0b583b29f60ca2f33cb3ca9ce8b --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 19:06:02,586 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 19:06:02,587 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 19:06:02,613 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 19:06:02,613 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 19:06:02,614 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 19:06:02,615 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 19:06:02,616 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 19:06:02,617 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 19:06:02,618 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 19:06:02,619 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 19:06:02,620 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 19:06:02,634 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 19:06:02,635 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 19:06:02,636 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 19:06:02,637 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 19:06:02,639 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 19:06:02,640 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 19:06:02,641 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 19:06:02,642 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 19:06:02,643 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 19:06:02,659 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 19:06:02,659 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 19:06:02,660 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 19:06:02,666 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 19:06:02,670 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 19:06:02,670 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 19:06:02,671 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 19:06:02,672 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 19:06:02,672 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 19:06:02,673 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 19:06:02,673 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 19:06:02,674 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 19:06:02,675 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 19:06:02,676 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 19:06:02,676 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 19:06:02,677 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 19:06:02,678 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 19:06:02,678 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 19:06:02,678 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 19:06:02,681 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 19:06:02,682 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 19:06:02,703 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 19:06:02,704 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 19:06:02,704 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 19:06:02,704 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 19:06:02,705 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 19:06:02,705 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 19:06:02,705 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 19:06:02,706 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 19:06:02,706 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 19:06:02,706 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 19:06:02,707 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 19:06:02,707 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 19:06:02,707 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 19:06:02,707 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 19:06:02,707 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 19:06:02,707 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 19:06:02,708 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 19:06:02,708 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 19:06:02,708 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 19:06:02,708 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 19:06:02,708 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 19:06:02,708 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 19:06:02,708 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 19:06:02,709 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 19:06:02,709 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 19:06:02,709 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 19:06:02,709 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 19:06:02,709 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 19:06:02,709 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 19:06:02,710 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 19:06:02,710 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 19:06:02,710 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 19:06:02,710 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 19:06:02,710 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 19:06:02,710 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 211a040b667c92c6d715ed7462c0db91088ae0b583b29f60ca2f33cb3ca9ce8b [2021-12-17 19:06:02,895 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 19:06:02,912 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 19:06:02,914 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 19:06:02,915 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 19:06:02,915 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 19:06:02,916 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/Problem05_label49+token_ring.05.cil-1.c [2021-12-17 19:06:02,953 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79b69e90f/67626eefedb4467787280ddd93a82f07/FLAGed8ea4e2d [2021-12-17 19:06:03,593 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 19:06:03,593 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/Problem05_label49+token_ring.05.cil-1.c [2021-12-17 19:06:03,621 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79b69e90f/67626eefedb4467787280ddd93a82f07/FLAGed8ea4e2d [2021-12-17 19:06:03,775 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79b69e90f/67626eefedb4467787280ddd93a82f07 [2021-12-17 19:06:03,778 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 19:06:03,779 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 19:06:03,781 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 19:06:03,781 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 19:06:03,783 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 19:06:03,784 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 07:06:03" (1/1) ... [2021-12-17 19:06:03,785 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e30e54a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:06:03, skipping insertion in model container [2021-12-17 19:06:03,785 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 07:06:03" (1/1) ... [2021-12-17 19:06:03,789 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 19:06:03,915 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 19:06:05,174 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/Problem05_label49+token_ring.05.cil-1.c[380593,380606] [2021-12-17 19:06:05,196 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/Problem05_label49+token_ring.05.cil-1.c[383339,383352] [2021-12-17 19:06:05,374 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 19:06:05,382 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 19:06:06,003 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/Problem05_label49+token_ring.05.cil-1.c[380593,380606] [2021-12-17 19:06:06,007 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/Problem05_label49+token_ring.05.cil-1.c[383339,383352] [2021-12-17 19:06:06,014 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 19:06:06,068 INFO L208 MainTranslator]: Completed translation [2021-12-17 19:06:06,068 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:06:06 WrapperNode [2021-12-17 19:06:06,068 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 19:06:06,069 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 19:06:06,070 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 19:06:06,070 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 19:06:06,074 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:06:06" (1/1) ... [2021-12-17 19:06:06,145 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:06:06" (1/1) ... [2021-12-17 19:06:06,500 INFO L137 Inliner]: procedures = 54, calls = 56, calls flagged for inlining = 32, calls inlined = 32, statements flattened = 12793 [2021-12-17 19:06:06,500 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 19:06:06,501 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 19:06:06,501 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 19:06:06,501 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 19:06:06,507 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:06:06" (1/1) ... [2021-12-17 19:06:06,508 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:06:06" (1/1) ... [2021-12-17 19:06:06,614 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:06:06" (1/1) ... [2021-12-17 19:06:06,615 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:06:06" (1/1) ... [2021-12-17 19:06:06,730 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:06:06" (1/1) ... [2021-12-17 19:06:06,757 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:06:06" (1/1) ... [2021-12-17 19:06:06,776 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:06:06" (1/1) ... [2021-12-17 19:06:06,816 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 19:06:06,817 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 19:06:06,818 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 19:06:06,818 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 19:06:06,818 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:06:06" (1/1) ... [2021-12-17 19:06:06,823 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 19:06:06,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 19:06:06,850 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) [2021-12-17 19:06:06,876 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 [2021-12-17 19:06:06,888 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 19:06:06,888 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-12-17 19:06:06,889 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-12-17 19:06:06,889 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-17 19:06:06,889 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-17 19:06:06,889 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-12-17 19:06:06,889 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-12-17 19:06:06,889 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-12-17 19:06:06,890 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-12-17 19:06:06,890 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-12-17 19:06:06,890 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-12-17 19:06:06,890 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-12-17 19:06:06,890 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-12-17 19:06:06,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 19:06:06,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 19:06:06,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 19:06:06,964 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 19:06:06,965 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 19:06:11,392 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 19:06:11,425 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 19:06:11,425 INFO L301 CfgBuilder]: Removed 9 assume(true) statements. [2021-12-17 19:06:11,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 07:06:11 BoogieIcfgContainer [2021-12-17 19:06:11,445 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 19:06:11,446 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 19:06:11,446 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 19:06:11,449 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 19:06:11,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 07:06:03" (1/3) ... [2021-12-17 19:06:11,449 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@eb4cb48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 07:06:11, skipping insertion in model container [2021-12-17 19:06:11,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:06:06" (2/3) ... [2021-12-17 19:06:11,450 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@eb4cb48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 07:06:11, skipping insertion in model container [2021-12-17 19:06:11,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 07:06:11" (3/3) ... [2021-12-17 19:06:11,451 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label49+token_ring.05.cil-1.c [2021-12-17 19:06:11,454 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 19:06:11,454 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-17 19:06:11,507 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 19:06:11,513 INFO L339 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=PETRI_NET, 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 19:06:11,513 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-17 19:06:11,557 INFO L276 IsEmpty]: Start isEmpty. Operand has 2390 states, 2362 states have (on average 1.8526672311600338) internal successors, (4376), 2365 states have internal predecessors, (4376), 19 states have call successors, (19), 6 states have call predecessors, (19), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-12-17 19:06:11,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-17 19:06:11,573 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:06:11,574 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 19:06:11,574 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:06:11,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:06:11,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1427785225, now seen corresponding path program 1 times [2021-12-17 19:06:11,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:06:11,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056188957] [2021-12-17 19:06:11,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:06:11,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:06:11,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:11,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:06:11,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:11,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 19:06:11,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:11,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-17 19:06:11,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:11,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 19:06:11,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:11,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 19:06:11,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:11,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 19:06:11,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:06:11,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056188957] [2021-12-17 19:06:11,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056188957] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:06:11,900 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 19:06:11,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 19:06:11,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031530735] [2021-12-17 19:06:11,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:06:11,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 19:06:11,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:06:11,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 19:06:11,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 19:06:11,928 INFO L87 Difference]: Start difference. First operand has 2390 states, 2362 states have (on average 1.8526672311600338) internal successors, (4376), 2365 states have internal predecessors, (4376), 19 states have call successors, (19), 6 states have call predecessors, (19), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 19:06:12,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:06:12,739 INFO L93 Difference]: Finished difference Result 4837 states and 8925 transitions. [2021-12-17 19:06:12,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 19:06:12,741 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 101 [2021-12-17 19:06:12,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:06:12,762 INFO L225 Difference]: With dead ends: 4837 [2021-12-17 19:06:12,763 INFO L226 Difference]: Without dead ends: 2388 [2021-12-17 19:06:12,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-17 19:06:12,780 INFO L933 BasicCegarLoop]: 4361 mSDtfsCounter, 507 mSDsluCounter, 12296 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 524 SdHoareTripleChecker+Valid, 16657 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 19:06:12,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [524 Valid, 16657 Invalid, 385 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [46 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 19:06:12,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2388 states. [2021-12-17 19:06:12,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2388 to 2323. [2021-12-17 19:06:12,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2323 states, 2296 states have (on average 1.84102787456446) internal successors, (4227), 2298 states have internal predecessors, (4227), 19 states have call successors, (19), 6 states have call predecessors, (19), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-12-17 19:06:12,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2323 states to 2323 states and 4265 transitions. [2021-12-17 19:06:12,879 INFO L78 Accepts]: Start accepts. Automaton has 2323 states and 4265 transitions. Word has length 101 [2021-12-17 19:06:12,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:06:12,879 INFO L470 AbstractCegarLoop]: Abstraction has 2323 states and 4265 transitions. [2021-12-17 19:06:12,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 19:06:12,880 INFO L276 IsEmpty]: Start isEmpty. Operand 2323 states and 4265 transitions. [2021-12-17 19:06:12,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-17 19:06:12,882 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:06:12,882 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 19:06:12,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 19:06:12,883 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:06:12,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:06:12,883 INFO L85 PathProgramCache]: Analyzing trace with hash 990118841, now seen corresponding path program 1 times [2021-12-17 19:06:12,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:06:12,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211575522] [2021-12-17 19:06:12,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:06:12,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:06:12,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:12,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:06:12,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:12,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 19:06:12,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:12,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-17 19:06:12,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:12,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 19:06:12,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:13,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 19:06:13,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:13,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 19:06:13,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:06:13,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211575522] [2021-12-17 19:06:13,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211575522] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:06:13,020 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 19:06:13,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 19:06:13,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084261938] [2021-12-17 19:06:13,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:06:13,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 19:06:13,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:06:13,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 19:06:13,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 19:06:13,023 INFO L87 Difference]: Start difference. First operand 2323 states and 4265 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 19:06:13,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:06:13,925 INFO L93 Difference]: Finished difference Result 2835 states and 5072 transitions. [2021-12-17 19:06:13,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 19:06:13,926 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 101 [2021-12-17 19:06:13,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:06:13,938 INFO L225 Difference]: With dead ends: 2835 [2021-12-17 19:06:13,938 INFO L226 Difference]: Without dead ends: 2646 [2021-12-17 19:06:13,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-17 19:06:13,943 INFO L933 BasicCegarLoop]: 4316 mSDtfsCounter, 4705 mSDsluCounter, 12418 mSDsCounter, 0 mSdLazyCounter, 952 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4717 SdHoareTripleChecker+Valid, 16734 SdHoareTripleChecker+Invalid, 1040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 19:06:13,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4717 Valid, 16734 Invalid, 1040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 952 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 19:06:13,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2646 states. [2021-12-17 19:06:13,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2646 to 2517. [2021-12-17 19:06:14,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2517 states, 2469 states have (on average 1.820980153908465) internal successors, (4496), 2472 states have internal predecessors, (4496), 33 states have call successors, (33), 12 states have call predecessors, (33), 13 states have return successors, (36), 33 states have call predecessors, (36), 33 states have call successors, (36) [2021-12-17 19:06:14,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2517 states to 2517 states and 4565 transitions. [2021-12-17 19:06:14,009 INFO L78 Accepts]: Start accepts. Automaton has 2517 states and 4565 transitions. Word has length 101 [2021-12-17 19:06:14,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:06:14,010 INFO L470 AbstractCegarLoop]: Abstraction has 2517 states and 4565 transitions. [2021-12-17 19:06:14,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 19:06:14,011 INFO L276 IsEmpty]: Start isEmpty. Operand 2517 states and 4565 transitions. [2021-12-17 19:06:14,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-17 19:06:14,014 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:06:14,015 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 19:06:14,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 19:06:14,016 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:06:14,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:06:14,016 INFO L85 PathProgramCache]: Analyzing trace with hash -726765763, now seen corresponding path program 1 times [2021-12-17 19:06:14,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:06:14,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506019334] [2021-12-17 19:06:14,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:06:14,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:06:14,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:14,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:06:14,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:14,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 19:06:14,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:14,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-17 19:06:14,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:14,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 19:06:14,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:14,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 19:06:14,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:14,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 19:06:14,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:06:14,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506019334] [2021-12-17 19:06:14,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506019334] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:06:14,183 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 19:06:14,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 19:06:14,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159330815] [2021-12-17 19:06:14,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:06:14,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 19:06:14,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:06:14,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 19:06:14,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 19:06:14,187 INFO L87 Difference]: Start difference. First operand 2517 states and 4565 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 19:06:15,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:06:15,647 INFO L93 Difference]: Finished difference Result 3293 states and 5783 transitions. [2021-12-17 19:06:15,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 19:06:15,648 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 101 [2021-12-17 19:06:15,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:06:15,657 INFO L225 Difference]: With dead ends: 3293 [2021-12-17 19:06:15,657 INFO L226 Difference]: Without dead ends: 2910 [2021-12-17 19:06:15,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 19:06:15,659 INFO L933 BasicCegarLoop]: 4461 mSDtfsCounter, 4711 mSDsluCounter, 16854 mSDsCounter, 0 mSdLazyCounter, 1492 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4723 SdHoareTripleChecker+Valid, 21315 SdHoareTripleChecker+Invalid, 1558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 19:06:15,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4723 Valid, 21315 Invalid, 1558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1492 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-17 19:06:15,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2910 states. [2021-12-17 19:06:15,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2910 to 2698. [2021-12-17 19:06:15,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2698 states, 2629 states have (on average 1.8025865348041081) internal successors, (4739), 2633 states have internal predecessors, (4739), 47 states have call successors, (47), 18 states have call predecessors, (47), 20 states have return successors, (52), 48 states have call predecessors, (52), 47 states have call successors, (52) [2021-12-17 19:06:15,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2698 states to 2698 states and 4838 transitions. [2021-12-17 19:06:15,717 INFO L78 Accepts]: Start accepts. Automaton has 2698 states and 4838 transitions. Word has length 101 [2021-12-17 19:06:15,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:06:15,718 INFO L470 AbstractCegarLoop]: Abstraction has 2698 states and 4838 transitions. [2021-12-17 19:06:15,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 19:06:15,718 INFO L276 IsEmpty]: Start isEmpty. Operand 2698 states and 4838 transitions. [2021-12-17 19:06:15,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-17 19:06:15,719 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:06:15,719 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 19:06:15,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 19:06:15,720 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:06:15,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:06:15,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1689070587, now seen corresponding path program 1 times [2021-12-17 19:06:15,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:06:15,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740626092] [2021-12-17 19:06:15,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:06:15,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:06:15,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:15,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:06:15,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:15,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 19:06:15,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:15,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-17 19:06:15,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:15,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 19:06:15,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:15,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 19:06:15,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:15,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 19:06:15,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:06:15,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740626092] [2021-12-17 19:06:15,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740626092] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:06:15,804 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 19:06:15,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 19:06:15,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980393424] [2021-12-17 19:06:15,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:06:15,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 19:06:15,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:06:15,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 19:06:15,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 19:06:15,805 INFO L87 Difference]: Start difference. First operand 2698 states and 4838 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 19:06:16,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:06:16,982 INFO L93 Difference]: Finished difference Result 3966 states and 6824 transitions. [2021-12-17 19:06:16,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 19:06:16,983 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 101 [2021-12-17 19:06:16,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:06:16,994 INFO L225 Difference]: With dead ends: 3966 [2021-12-17 19:06:16,994 INFO L226 Difference]: Without dead ends: 3402 [2021-12-17 19:06:16,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 19:06:16,998 INFO L933 BasicCegarLoop]: 4449 mSDtfsCounter, 4705 mSDsluCounter, 16850 mSDsCounter, 0 mSdLazyCounter, 1485 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4717 SdHoareTripleChecker+Valid, 21299 SdHoareTripleChecker+Invalid, 1553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 19:06:16,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4717 Valid, 21299 Invalid, 1553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1485 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-17 19:06:17,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3402 states. [2021-12-17 19:06:17,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3402 to 3064. [2021-12-17 19:06:17,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3064 states, 2953 states have (on average 1.771757534710464) internal successors, (5232), 2959 states have internal predecessors, (5232), 75 states have call successors, (75), 30 states have call predecessors, (75), 34 states have return successors, (88), 78 states have call predecessors, (88), 75 states have call successors, (88) [2021-12-17 19:06:17,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3064 states to 3064 states and 5395 transitions. [2021-12-17 19:06:17,118 INFO L78 Accepts]: Start accepts. Automaton has 3064 states and 5395 transitions. Word has length 101 [2021-12-17 19:06:17,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:06:17,119 INFO L470 AbstractCegarLoop]: Abstraction has 3064 states and 5395 transitions. [2021-12-17 19:06:17,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 19:06:17,119 INFO L276 IsEmpty]: Start isEmpty. Operand 3064 states and 5395 transitions. [2021-12-17 19:06:17,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-17 19:06:17,120 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:06:17,121 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 19:06:17,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 19:06:17,121 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:06:17,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:06:17,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1039138759, now seen corresponding path program 1 times [2021-12-17 19:06:17,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:06:17,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993267968] [2021-12-17 19:06:17,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:06:17,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:06:17,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:17,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:06:17,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:17,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 19:06:17,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:17,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-17 19:06:17,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:17,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 19:06:17,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:17,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 19:06:17,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:17,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 19:06:17,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:06:17,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993267968] [2021-12-17 19:06:17,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993267968] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:06:17,213 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 19:06:17,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 19:06:17,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816841980] [2021-12-17 19:06:17,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:06:17,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 19:06:17,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:06:17,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 19:06:17,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 19:06:17,215 INFO L87 Difference]: Start difference. First operand 3064 states and 5395 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 19:06:18,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:06:18,328 INFO L93 Difference]: Finished difference Result 5270 states and 8833 transitions. [2021-12-17 19:06:18,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 19:06:18,329 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 101 [2021-12-17 19:06:18,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:06:18,343 INFO L225 Difference]: With dead ends: 5270 [2021-12-17 19:06:18,343 INFO L226 Difference]: Without dead ends: 4340 [2021-12-17 19:06:18,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 19:06:18,349 INFO L933 BasicCegarLoop]: 4444 mSDtfsCounter, 4704 mSDsluCounter, 16850 mSDsCounter, 0 mSdLazyCounter, 1477 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4716 SdHoareTripleChecker+Valid, 21294 SdHoareTripleChecker+Invalid, 1545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 19:06:18,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4716 Valid, 21294 Invalid, 1545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1477 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-17 19:06:18,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4340 states. [2021-12-17 19:06:18,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4340 to 3797. [2021-12-17 19:06:18,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3797 states, 3602 states have (on average 1.7262631871182677) internal successors, (6218), 3612 states have internal predecessors, (6218), 131 states have call successors, (131), 54 states have call predecessors, (131), 62 states have return successors, (166), 138 states have call predecessors, (166), 131 states have call successors, (166) [2021-12-17 19:06:18,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3797 states to 3797 states and 6515 transitions. [2021-12-17 19:06:18,461 INFO L78 Accepts]: Start accepts. Automaton has 3797 states and 6515 transitions. Word has length 101 [2021-12-17 19:06:18,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:06:18,462 INFO L470 AbstractCegarLoop]: Abstraction has 3797 states and 6515 transitions. [2021-12-17 19:06:18,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 19:06:18,462 INFO L276 IsEmpty]: Start isEmpty. Operand 3797 states and 6515 transitions. [2021-12-17 19:06:18,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-17 19:06:18,464 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:06:18,464 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 19:06:18,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 19:06:18,464 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:06:18,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:06:18,465 INFO L85 PathProgramCache]: Analyzing trace with hash -2096976837, now seen corresponding path program 1 times [2021-12-17 19:06:18,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:06:18,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048198580] [2021-12-17 19:06:18,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:06:18,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:06:18,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:18,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:06:18,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:18,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 19:06:18,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:18,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-17 19:06:18,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:18,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 19:06:18,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:18,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 19:06:18,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:18,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 19:06:18,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:06:18,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048198580] [2021-12-17 19:06:18,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048198580] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:06:18,553 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 19:06:18,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 19:06:18,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124793377] [2021-12-17 19:06:18,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:06:18,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 19:06:18,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:06:18,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 19:06:18,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 19:06:18,555 INFO L87 Difference]: Start difference. First operand 3797 states and 6515 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 19:06:19,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:06:19,780 INFO L93 Difference]: Finished difference Result 7877 states and 12867 transitions. [2021-12-17 19:06:19,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 19:06:19,781 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 101 [2021-12-17 19:06:19,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:06:19,813 INFO L225 Difference]: With dead ends: 7877 [2021-12-17 19:06:19,813 INFO L226 Difference]: Without dead ends: 6214 [2021-12-17 19:06:19,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 19:06:19,824 INFO L933 BasicCegarLoop]: 4439 mSDtfsCounter, 4703 mSDsluCounter, 16850 mSDsCounter, 0 mSdLazyCounter, 1469 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4715 SdHoareTripleChecker+Valid, 21289 SdHoareTripleChecker+Invalid, 1537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 19:06:19,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4715 Valid, 21289 Invalid, 1537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1469 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-17 19:06:19,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6214 states. [2021-12-17 19:06:19,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6214 to 5270. [2021-12-17 19:06:19,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5270 states, 4907 states have (on average 1.6710821275728551) internal successors, (8200), 4925 states have internal predecessors, (8200), 243 states have call successors, (243), 102 states have call predecessors, (243), 118 states have return successors, (340), 258 states have call predecessors, (340), 243 states have call successors, (340) [2021-12-17 19:06:19,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5270 states to 5270 states and 8783 transitions. [2021-12-17 19:06:19,963 INFO L78 Accepts]: Start accepts. Automaton has 5270 states and 8783 transitions. Word has length 101 [2021-12-17 19:06:19,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:06:19,963 INFO L470 AbstractCegarLoop]: Abstraction has 5270 states and 8783 transitions. [2021-12-17 19:06:19,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 19:06:19,963 INFO L276 IsEmpty]: Start isEmpty. Operand 5270 states and 8783 transitions. [2021-12-17 19:06:19,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-17 19:06:19,966 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:06:19,966 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 19:06:19,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 19:06:19,966 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:06:19,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:06:19,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1055487993, now seen corresponding path program 1 times [2021-12-17 19:06:19,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:06:19,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972501512] [2021-12-17 19:06:19,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:06:19,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:06:19,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:19,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:06:19,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:20,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 19:06:20,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:20,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-17 19:06:20,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:20,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 19:06:20,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:20,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 19:06:20,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:20,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 19:06:20,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:06:20,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972501512] [2021-12-17 19:06:20,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972501512] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:06:20,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 19:06:20,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 19:06:20,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153750969] [2021-12-17 19:06:20,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:06:20,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 19:06:20,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:06:20,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 19:06:20,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 19:06:20,051 INFO L87 Difference]: Start difference. First operand 5270 states and 8783 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 19:06:20,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:06:20,872 INFO L93 Difference]: Finished difference Result 9374 states and 15248 transitions. [2021-12-17 19:06:20,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 19:06:20,873 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 101 [2021-12-17 19:06:20,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:06:20,906 INFO L225 Difference]: With dead ends: 9374 [2021-12-17 19:06:20,906 INFO L226 Difference]: Without dead ends: 6238 [2021-12-17 19:06:20,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-17 19:06:20,920 INFO L933 BasicCegarLoop]: 4245 mSDtfsCounter, 4525 mSDsluCounter, 16313 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4538 SdHoareTripleChecker+Valid, 20558 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 19:06:20,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4538 Valid, 20558 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 689 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 19:06:20,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6238 states. [2021-12-17 19:06:21,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6238 to 5270. [2021-12-17 19:06:21,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5270 states, 4907 states have (on average 1.667617689015692) internal successors, (8183), 4925 states have internal predecessors, (8183), 243 states have call successors, (243), 102 states have call predecessors, (243), 118 states have return successors, (340), 258 states have call predecessors, (340), 243 states have call successors, (340) [2021-12-17 19:06:21,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5270 states to 5270 states and 8766 transitions. [2021-12-17 19:06:21,078 INFO L78 Accepts]: Start accepts. Automaton has 5270 states and 8766 transitions. Word has length 101 [2021-12-17 19:06:21,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:06:21,078 INFO L470 AbstractCegarLoop]: Abstraction has 5270 states and 8766 transitions. [2021-12-17 19:06:21,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 19:06:21,079 INFO L276 IsEmpty]: Start isEmpty. Operand 5270 states and 8766 transitions. [2021-12-17 19:06:21,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-17 19:06:21,083 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:06:21,084 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 19:06:21,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 19:06:21,084 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:06:21,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:06:21,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1295727739, now seen corresponding path program 1 times [2021-12-17 19:06:21,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:06:21,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334130013] [2021-12-17 19:06:21,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:06:21,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:06:21,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:21,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:06:21,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:21,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 19:06:21,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:21,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-17 19:06:21,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:21,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 19:06:21,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:21,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 19:06:21,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:21,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 19:06:21,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:06:21,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334130013] [2021-12-17 19:06:21,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334130013] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:06:21,169 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 19:06:21,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 19:06:21,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691625647] [2021-12-17 19:06:21,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:06:21,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 19:06:21,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:06:21,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 19:06:21,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 19:06:21,171 INFO L87 Difference]: Start difference. First operand 5270 states and 8766 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 19:06:22,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:06:22,835 INFO L93 Difference]: Finished difference Result 14146 states and 22495 transitions. [2021-12-17 19:06:22,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 19:06:22,835 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 101 [2021-12-17 19:06:22,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:06:22,863 INFO L225 Difference]: With dead ends: 14146 [2021-12-17 19:06:22,864 INFO L226 Difference]: Without dead ends: 11010 [2021-12-17 19:06:22,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-17 19:06:22,873 INFO L933 BasicCegarLoop]: 4501 mSDtfsCounter, 4737 mSDsluCounter, 16839 mSDsCounter, 0 mSdLazyCounter, 1668 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4748 SdHoareTripleChecker+Valid, 21340 SdHoareTripleChecker+Invalid, 1738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 19:06:22,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4748 Valid, 21340 Invalid, 1738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1668 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-17 19:06:22,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11010 states. [2021-12-17 19:06:23,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11010 to 8120. [2021-12-17 19:06:23,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8120 states, 7437 states have (on average 1.6150329433911523) internal successors, (12011), 7471 states have internal predecessors, (12011), 451 states have call successors, (451), 198 states have call predecessors, (451), 230 states have return successors, (726), 482 states have call predecessors, (726), 451 states have call successors, (726) [2021-12-17 19:06:23,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8120 states to 8120 states and 13188 transitions. [2021-12-17 19:06:23,111 INFO L78 Accepts]: Start accepts. Automaton has 8120 states and 13188 transitions. Word has length 101 [2021-12-17 19:06:23,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:06:23,111 INFO L470 AbstractCegarLoop]: Abstraction has 8120 states and 13188 transitions. [2021-12-17 19:06:23,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 19:06:23,111 INFO L276 IsEmpty]: Start isEmpty. Operand 8120 states and 13188 transitions. [2021-12-17 19:06:23,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-17 19:06:23,118 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:06:23,118 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 19:06:23,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 19:06:23,118 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:06:23,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:06:23,119 INFO L85 PathProgramCache]: Analyzing trace with hash 2134761401, now seen corresponding path program 1 times [2021-12-17 19:06:23,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:06:23,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690845095] [2021-12-17 19:06:23,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:06:23,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:06:23,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:23,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:06:23,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:23,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 19:06:23,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:23,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-17 19:06:23,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:23,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 19:06:23,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:23,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 19:06:23,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:23,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 19:06:23,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:06:23,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690845095] [2021-12-17 19:06:23,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690845095] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:06:23,196 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 19:06:23,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 19:06:23,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385858735] [2021-12-17 19:06:23,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:06:23,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 19:06:23,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:06:23,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 19:06:23,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 19:06:23,198 INFO L87 Difference]: Start difference. First operand 8120 states and 13188 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 19:06:23,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:06:23,973 INFO L93 Difference]: Finished difference Result 15838 states and 25379 transitions. [2021-12-17 19:06:23,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 19:06:23,974 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 101 [2021-12-17 19:06:23,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:06:24,000 INFO L225 Difference]: With dead ends: 15838 [2021-12-17 19:06:24,000 INFO L226 Difference]: Without dead ends: 9852 [2021-12-17 19:06:24,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-17 19:06:24,018 INFO L933 BasicCegarLoop]: 4250 mSDtfsCounter, 4502 mSDsluCounter, 16314 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4515 SdHoareTripleChecker+Valid, 20564 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 19:06:24,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4515 Valid, 20564 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 695 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 19:06:24,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9852 states. [2021-12-17 19:06:24,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9852 to 8120. [2021-12-17 19:06:24,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8120 states, 7437 states have (on average 1.6105956702971629) internal successors, (11978), 7471 states have internal predecessors, (11978), 451 states have call successors, (451), 198 states have call predecessors, (451), 230 states have return successors, (726), 482 states have call predecessors, (726), 451 states have call successors, (726) [2021-12-17 19:06:24,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8120 states to 8120 states and 13155 transitions. [2021-12-17 19:06:24,398 INFO L78 Accepts]: Start accepts. Automaton has 8120 states and 13155 transitions. Word has length 101 [2021-12-17 19:06:24,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:06:24,399 INFO L470 AbstractCegarLoop]: Abstraction has 8120 states and 13155 transitions. [2021-12-17 19:06:24,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 19:06:24,399 INFO L276 IsEmpty]: Start isEmpty. Operand 8120 states and 13155 transitions. [2021-12-17 19:06:24,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-17 19:06:24,402 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:06:24,403 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 19:06:24,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 19:06:24,403 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:06:24,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:06:24,405 INFO L85 PathProgramCache]: Analyzing trace with hash -2133140293, now seen corresponding path program 1 times [2021-12-17 19:06:24,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:06:24,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337620550] [2021-12-17 19:06:24,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:06:24,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:06:24,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:24,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:06:24,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:24,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 19:06:24,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:24,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-17 19:06:24,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:24,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 19:06:24,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:24,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 19:06:24,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:24,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 19:06:24,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:06:24,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337620550] [2021-12-17 19:06:24,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337620550] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:06:24,478 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 19:06:24,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 19:06:24,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246667002] [2021-12-17 19:06:24,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:06:24,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 19:06:24,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:06:24,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 19:06:24,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 19:06:24,480 INFO L87 Difference]: Start difference. First operand 8120 states and 13155 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 19:06:26,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:06:26,096 INFO L93 Difference]: Finished difference Result 24368 states and 38351 transitions. [2021-12-17 19:06:26,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 19:06:26,097 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 101 [2021-12-17 19:06:26,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:06:26,151 INFO L225 Difference]: With dead ends: 24368 [2021-12-17 19:06:26,152 INFO L226 Difference]: Without dead ends: 18382 [2021-12-17 19:06:26,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-17 19:06:26,172 INFO L933 BasicCegarLoop]: 4413 mSDtfsCounter, 4786 mSDsluCounter, 16842 mSDsCounter, 0 mSdLazyCounter, 1405 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4804 SdHoareTripleChecker+Valid, 21255 SdHoareTripleChecker+Invalid, 1481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 19:06:26,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4804 Valid, 21255 Invalid, 1481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1405 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-17 19:06:26,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18382 states. [2021-12-17 19:06:26,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18382 to 13914. [2021-12-17 19:06:26,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13914 states, 12607 states have (on average 1.568493693979535) internal successors, (19774), 12673 states have internal predecessors, (19774), 851 states have call successors, (851), 390 states have call predecessors, (851), 454 states have return successors, (1644), 914 states have call predecessors, (1644), 851 states have call successors, (1644) [2021-12-17 19:06:26,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13914 states to 13914 states and 22269 transitions. [2021-12-17 19:06:26,799 INFO L78 Accepts]: Start accepts. Automaton has 13914 states and 22269 transitions. Word has length 101 [2021-12-17 19:06:26,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:06:26,799 INFO L470 AbstractCegarLoop]: Abstraction has 13914 states and 22269 transitions. [2021-12-17 19:06:26,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 19:06:26,800 INFO L276 IsEmpty]: Start isEmpty. Operand 13914 states and 22269 transitions. [2021-12-17 19:06:26,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-17 19:06:26,809 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:06:26,809 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 19:06:26,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 19:06:26,809 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:06:26,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:06:26,810 INFO L85 PathProgramCache]: Analyzing trace with hash 84490105, now seen corresponding path program 1 times [2021-12-17 19:06:26,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:06:26,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441983016] [2021-12-17 19:06:26,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:06:26,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:06:26,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:26,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:06:26,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:26,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 19:06:26,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:26,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-17 19:06:26,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:26,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 19:06:26,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:26,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 19:06:26,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:26,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 19:06:26,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:06:26,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441983016] [2021-12-17 19:06:26,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441983016] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:06:26,885 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 19:06:26,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 19:06:26,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943891860] [2021-12-17 19:06:26,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:06:26,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 19:06:26,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:06:26,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 19:06:26,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 19:06:26,887 INFO L87 Difference]: Start difference. First operand 13914 states and 22269 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 19:06:27,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:06:27,840 INFO L93 Difference]: Finished difference Result 28764 states and 45950 transitions. [2021-12-17 19:06:27,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 19:06:27,840 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 101 [2021-12-17 19:06:27,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:06:27,882 INFO L225 Difference]: With dead ends: 28764 [2021-12-17 19:06:27,883 INFO L226 Difference]: Without dead ends: 16984 [2021-12-17 19:06:27,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-17 19:06:27,904 INFO L933 BasicCegarLoop]: 4240 mSDtfsCounter, 4584 mSDsluCounter, 12253 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4597 SdHoareTripleChecker+Valid, 16493 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 19:06:27,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4597 Valid, 16493 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 19:06:27,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16984 states. [2021-12-17 19:06:28,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16984 to 13914. [2021-12-17 19:06:28,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13914 states, 12607 states have (on average 1.5633378281906878) internal successors, (19709), 12673 states have internal predecessors, (19709), 851 states have call successors, (851), 390 states have call predecessors, (851), 454 states have return successors, (1644), 914 states have call predecessors, (1644), 851 states have call successors, (1644) [2021-12-17 19:06:28,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13914 states to 13914 states and 22204 transitions. [2021-12-17 19:06:28,380 INFO L78 Accepts]: Start accepts. Automaton has 13914 states and 22204 transitions. Word has length 101 [2021-12-17 19:06:28,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:06:28,380 INFO L470 AbstractCegarLoop]: Abstraction has 13914 states and 22204 transitions. [2021-12-17 19:06:28,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 19:06:28,380 INFO L276 IsEmpty]: Start isEmpty. Operand 13914 states and 22204 transitions. [2021-12-17 19:06:28,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-17 19:06:28,387 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:06:28,387 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 19:06:28,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 19:06:28,388 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:06:28,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:06:28,388 INFO L85 PathProgramCache]: Analyzing trace with hash 971712951, now seen corresponding path program 1 times [2021-12-17 19:06:28,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:06:28,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508519492] [2021-12-17 19:06:28,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:06:28,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:06:28,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:28,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:06:28,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:28,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 19:06:28,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:28,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-17 19:06:28,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:28,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 19:06:28,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:28,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 19:06:28,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:28,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 19:06:28,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:06:28,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508519492] [2021-12-17 19:06:28,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508519492] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:06:28,449 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 19:06:28,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 19:06:28,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482621335] [2021-12-17 19:06:28,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:06:28,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 19:06:28,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:06:28,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 19:06:28,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 19:06:28,450 INFO L87 Difference]: Start difference. First operand 13914 states and 22204 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 19:06:30,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:06:30,091 INFO L93 Difference]: Finished difference Result 36093 states and 56590 transitions. [2021-12-17 19:06:30,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 19:06:30,092 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 101 [2021-12-17 19:06:30,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:06:30,154 INFO L225 Difference]: With dead ends: 36093 [2021-12-17 19:06:30,155 INFO L226 Difference]: Without dead ends: 24314 [2021-12-17 19:06:30,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-17 19:06:30,184 INFO L933 BasicCegarLoop]: 4556 mSDtfsCounter, 4907 mSDsluCounter, 12519 mSDsCounter, 0 mSdLazyCounter, 1149 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4938 SdHoareTripleChecker+Valid, 17075 SdHoareTripleChecker+Invalid, 1248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 19:06:30,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4938 Valid, 17075 Invalid, 1248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1149 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-17 19:06:30,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24314 states. [2021-12-17 19:06:30,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24314 to 19813. [2021-12-17 19:06:30,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19813 states, 17829 states have (on average 1.536822031521678) internal successors, (27400), 17960 states have internal predecessors, (27400), 1298 states have call successors, (1298), 588 states have call predecessors, (1298), 684 states have return successors, (2335), 1328 states have call predecessors, (2335), 1298 states have call successors, (2335) [2021-12-17 19:06:30,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19813 states to 19813 states and 31033 transitions. [2021-12-17 19:06:30,937 INFO L78 Accepts]: Start accepts. Automaton has 19813 states and 31033 transitions. Word has length 101 [2021-12-17 19:06:30,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:06:30,938 INFO L470 AbstractCegarLoop]: Abstraction has 19813 states and 31033 transitions. [2021-12-17 19:06:30,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 19:06:30,938 INFO L276 IsEmpty]: Start isEmpty. Operand 19813 states and 31033 transitions. [2021-12-17 19:06:30,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-12-17 19:06:30,977 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:06:30,977 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 19:06:30,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 19:06:30,977 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:06:30,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:06:30,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1967377923, now seen corresponding path program 1 times [2021-12-17 19:06:30,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:06:30,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305548620] [2021-12-17 19:06:30,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:06:30,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:06:30,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:30,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:06:30,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:31,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 19:06:31,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:31,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-17 19:06:31,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:31,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 19:06:31,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:31,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 19:06:31,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:31,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-17 19:06:31,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:31,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 19:06:31,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:31,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-17 19:06:31,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:31,077 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 19:06:31,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:06:31,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305548620] [2021-12-17 19:06:31,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305548620] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 19:06:31,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037476121] [2021-12-17 19:06:31,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:06:31,078 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 19:06:31,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 19:06:31,079 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) [2021-12-17 19:06:31,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 19:06:31,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:31,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 19:06:31,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 19:06:31,421 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-17 19:06:31,421 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 19:06:31,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037476121] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:06:31,421 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 19:06:31,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-17 19:06:31,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786663488] [2021-12-17 19:06:31,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:06:31,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 19:06:31,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:06:31,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 19:06:31,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 19:06:31,423 INFO L87 Difference]: Start difference. First operand 19813 states and 31033 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 19:06:32,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:06:32,578 INFO L93 Difference]: Finished difference Result 54822 states and 85237 transitions. [2021-12-17 19:06:32,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 19:06:32,578 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 164 [2021-12-17 19:06:32,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:06:32,687 INFO L225 Difference]: With dead ends: 54822 [2021-12-17 19:06:32,687 INFO L226 Difference]: Without dead ends: 37144 [2021-12-17 19:06:32,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 19:06:32,733 INFO L933 BasicCegarLoop]: 4272 mSDtfsCounter, 4208 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4208 SdHoareTripleChecker+Valid, 4545 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 19:06:32,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4208 Valid, 4545 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 19:06:32,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37144 states. [2021-12-17 19:06:34,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37144 to 36946. [2021-12-17 19:06:34,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36946 states, 33034 states have (on average 1.5147726584730883) internal successors, (50039), 33294 states have internal predecessors, (50039), 2542 states have call successors, (2542), 1176 states have call predecessors, (2542), 1368 states have return successors, (4553), 2539 states have call predecessors, (4553), 2542 states have call successors, (4553) [2021-12-17 19:06:34,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36946 states to 36946 states and 57134 transitions. [2021-12-17 19:06:34,151 INFO L78 Accepts]: Start accepts. Automaton has 36946 states and 57134 transitions. Word has length 164 [2021-12-17 19:06:34,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:06:34,152 INFO L470 AbstractCegarLoop]: Abstraction has 36946 states and 57134 transitions. [2021-12-17 19:06:34,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 19:06:34,152 INFO L276 IsEmpty]: Start isEmpty. Operand 36946 states and 57134 transitions. [2021-12-17 19:06:34,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-12-17 19:06:34,291 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:06:34,291 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 19:06:34,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 19:06:34,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-17 19:06:34,524 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:06:34,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:06:34,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1727463715, now seen corresponding path program 1 times [2021-12-17 19:06:34,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:06:34,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049767765] [2021-12-17 19:06:34,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:06:34,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:06:34,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:34,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:06:34,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:34,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 19:06:34,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:34,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-17 19:06:34,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:34,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 19:06:34,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:34,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 19:06:34,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:34,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-17 19:06:34,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:34,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 19:06:34,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:34,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-17 19:06:34,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:34,626 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 19:06:34,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:06:34,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049767765] [2021-12-17 19:06:34,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049767765] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 19:06:34,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125212777] [2021-12-17 19:06:34,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:06:34,627 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 19:06:34,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 19:06:34,628 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) [2021-12-17 19:06:34,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 19:06:34,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:34,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 19:06:34,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 19:06:34,985 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-17 19:06:34,985 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 19:06:34,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125212777] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:06:34,986 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 19:06:34,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-17 19:06:34,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431156944] [2021-12-17 19:06:34,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:06:34,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 19:06:34,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:06:34,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 19:06:34,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 19:06:34,989 INFO L87 Difference]: Start difference. First operand 36946 states and 57134 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 2 states have internal predecessors, (122), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 19:06:37,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:06:37,107 INFO L93 Difference]: Finished difference Result 105587 states and 163172 transitions. [2021-12-17 19:06:37,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 19:06:37,107 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 2 states have internal predecessors, (122), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 164 [2021-12-17 19:06:37,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:06:37,343 INFO L225 Difference]: With dead ends: 105587 [2021-12-17 19:06:37,344 INFO L226 Difference]: Without dead ends: 70776 [2021-12-17 19:06:37,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 19:06:37,437 INFO L933 BasicCegarLoop]: 4272 mSDtfsCounter, 4202 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4202 SdHoareTripleChecker+Valid, 4545 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 19:06:37,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4202 Valid, 4545 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 19:06:37,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70776 states. [2021-12-17 19:06:40,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70776 to 70382. [2021-12-17 19:06:40,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70382 states, 62760 states have (on average 1.5031708094327598) internal successors, (94339), 63278 states have internal predecessors, (94339), 4884 states have call successors, (4884), 2352 states have call predecessors, (4884), 2736 states have return successors, (8843), 4815 states have call predecessors, (8843), 4884 states have call successors, (8843) [2021-12-17 19:06:40,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70382 states to 70382 states and 108066 transitions. [2021-12-17 19:06:40,524 INFO L78 Accepts]: Start accepts. Automaton has 70382 states and 108066 transitions. Word has length 164 [2021-12-17 19:06:40,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:06:40,525 INFO L470 AbstractCegarLoop]: Abstraction has 70382 states and 108066 transitions. [2021-12-17 19:06:40,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 2 states have internal predecessors, (122), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 19:06:40,525 INFO L276 IsEmpty]: Start isEmpty. Operand 70382 states and 108066 transitions. [2021-12-17 19:06:40,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-12-17 19:06:40,616 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:06:40,616 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 19:06:40,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 19:06:40,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-17 19:06:40,834 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:06:40,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:06:40,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1621685181, now seen corresponding path program 1 times [2021-12-17 19:06:40,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:06:40,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968171672] [2021-12-17 19:06:40,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:06:40,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:06:40,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:40,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:06:40,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:40,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 19:06:40,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:40,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-17 19:06:40,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:40,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 19:06:40,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:40,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 19:06:40,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:40,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-17 19:06:40,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:40,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 19:06:40,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:40,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-17 19:06:40,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:40,919 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 19:06:40,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:06:40,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968171672] [2021-12-17 19:06:40,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968171672] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 19:06:40,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678379171] [2021-12-17 19:06:40,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:06:40,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 19:06:40,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 19:06:40,921 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) [2021-12-17 19:06:40,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 19:06:41,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:41,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 650 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 19:06:41,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 19:06:41,345 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-17 19:06:41,345 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 19:06:41,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678379171] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:06:41,345 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 19:06:41,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-17 19:06:41,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343350575] [2021-12-17 19:06:41,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:06:41,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 19:06:41,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:06:41,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 19:06:41,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 19:06:41,347 INFO L87 Difference]: Start difference. First operand 70382 states and 108066 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 2 states have internal predecessors, (134), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 19:06:46,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:06:46,017 INFO L93 Difference]: Finished difference Result 204915 states and 315566 transitions. [2021-12-17 19:06:46,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 19:06:46,018 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 2 states have internal predecessors, (134), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 164 [2021-12-17 19:06:46,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:06:46,523 INFO L225 Difference]: With dead ends: 204915 [2021-12-17 19:06:46,523 INFO L226 Difference]: Without dead ends: 136668 [2021-12-17 19:06:46,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 19:06:46,651 INFO L933 BasicCegarLoop]: 4272 mSDtfsCounter, 4190 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4190 SdHoareTripleChecker+Valid, 4545 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 19:06:46,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4190 Valid, 4545 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 19:06:46,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136668 states. [2021-12-17 19:06:52,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136668 to 135882. [2021-12-17 19:06:52,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135882 states, 121036 states have (on average 1.4968687002214218) internal successors, (181175), 122070 states have internal predecessors, (181175), 9372 states have call successors, (9372), 4704 states have call predecessors, (9372), 5472 states have return successors, (17227), 9171 states have call predecessors, (17227), 9372 states have call successors, (17227) [2021-12-17 19:06:52,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135882 states to 135882 states and 207774 transitions. [2021-12-17 19:06:52,776 INFO L78 Accepts]: Start accepts. Automaton has 135882 states and 207774 transitions. Word has length 164 [2021-12-17 19:06:52,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:06:52,777 INFO L470 AbstractCegarLoop]: Abstraction has 135882 states and 207774 transitions. [2021-12-17 19:06:52,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 2 states have internal predecessors, (134), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 19:06:52,777 INFO L276 IsEmpty]: Start isEmpty. Operand 135882 states and 207774 transitions. [2021-12-17 19:06:53,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-12-17 19:06:53,200 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:06:53,200 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 19:06:53,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 19:06:53,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 19:06:53,418 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:06:53,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:06:53,418 INFO L85 PathProgramCache]: Analyzing trace with hash -2014758755, now seen corresponding path program 1 times [2021-12-17 19:06:53,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:06:53,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634877103] [2021-12-17 19:06:53,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:06:53,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:06:53,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:53,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:06:53,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:53,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 19:06:53,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:53,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-17 19:06:53,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:53,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 19:06:53,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:53,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 19:06:53,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:53,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-17 19:06:53,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:53,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 19:06:53,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:53,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-17 19:06:53,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:53,523 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 19:06:53,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:06:53,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634877103] [2021-12-17 19:06:53,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634877103] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 19:06:53,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197332734] [2021-12-17 19:06:53,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:06:53,524 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 19:06:53,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 19:06:53,525 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) [2021-12-17 19:06:53,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 19:06:53,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:53,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 644 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 19:06:53,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 19:06:53,832 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-17 19:06:53,833 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 19:06:53,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197332734] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:06:53,833 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 19:06:53,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-17 19:06:53,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327774985] [2021-12-17 19:06:53,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:06:53,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 19:06:53,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:06:53,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 19:06:53,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 19:06:53,835 INFO L87 Difference]: Start difference. First operand 135882 states and 207774 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8)