./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/Problem05_label45+token_ring.02.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 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_label45+token_ring.02.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 1e48f4337a15a9c341fdd857d44943beb3f49e54e3888dcfe82472f36a11730d --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 12:36:48,681 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 12:36:48,682 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 12:36:48,725 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 12:36:48,725 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 12:36:48,726 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 12:36:48,727 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 12:36:48,728 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 12:36:48,729 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 12:36:48,732 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 12:36:48,733 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 12:36:48,745 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 12:36:48,745 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 12:36:48,749 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 12:36:48,750 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 12:36:48,751 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 12:36:48,752 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 12:36:48,754 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 12:36:48,755 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 12:36:48,758 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 12:36:48,762 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 12:36:48,762 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 12:36:48,763 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 12:36:48,764 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 12:36:48,766 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 12:36:48,768 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 12:36:48,768 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 12:36:48,769 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 12:36:48,770 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 12:36:48,770 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 12:36:48,770 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 12:36:48,771 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 12:36:48,772 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 12:36:48,772 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 12:36:48,773 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 12:36:48,774 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 12:36:48,774 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 12:36:48,774 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 12:36:48,775 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 12:36:48,775 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 12:36:48,776 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 12:36:48,777 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 12:36:48,796 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 12:36:48,796 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 12:36:48,796 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 12:36:48,796 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 12:36:48,797 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 12:36:48,797 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 12:36:48,798 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 12:36:48,798 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 12:36:48,798 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 12:36:48,798 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 12:36:48,799 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 12:36:48,799 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 12:36:48,799 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 12:36:48,800 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 12:36:48,800 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 12:36:48,800 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 12:36:48,800 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 12:36:48,800 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 12:36:48,800 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 12:36:48,800 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 12:36:48,801 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 12:36:48,801 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 12:36:48,801 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 12:36:48,801 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 12:36:48,802 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 12:36:48,802 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 12:36:48,802 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 12:36:48,803 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 12:36:48,803 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 12:36:48,803 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 12:36:48,803 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 12:36:48,804 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 12:36:48,804 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 12:36:48,804 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 12:36:48,804 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1e48f4337a15a9c341fdd857d44943beb3f49e54e3888dcfe82472f36a11730d [2021-12-22 12:36:48,986 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 12:36:49,008 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 12:36:49,011 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 12:36:49,011 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 12:36:49,012 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 12:36:49,013 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/Problem05_label45+token_ring.02.cil-1.c [2021-12-22 12:36:49,057 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b041f9dd4/92a93b3835ce4dd0bb39de52e826ad80/FLAGf23537214 [2021-12-22 12:36:49,737 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 12:36:49,738 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/Problem05_label45+token_ring.02.cil-1.c [2021-12-22 12:36:49,767 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b041f9dd4/92a93b3835ce4dd0bb39de52e826ad80/FLAGf23537214 [2021-12-22 12:36:49,827 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b041f9dd4/92a93b3835ce4dd0bb39de52e826ad80 [2021-12-22 12:36:49,829 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 12:36:49,831 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 12:36:49,833 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 12:36:49,833 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 12:36:49,835 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 12:36:49,836 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 12:36:49" (1/1) ... [2021-12-22 12:36:49,837 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bf39e63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:36:49, skipping insertion in model container [2021-12-22 12:36:49,837 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 12:36:49" (1/1) ... [2021-12-22 12:36:49,841 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 12:36:49,977 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 12:36:51,168 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_label45+token_ring.02.cil-1.c[380323,380336] [2021-12-22 12:36:51,186 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_label45+token_ring.02.cil-1.c[383339,383352] [2021-12-22 12:36:51,294 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 12:36:51,304 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 12:36:51,960 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_label45+token_ring.02.cil-1.c[380323,380336] [2021-12-22 12:36:51,965 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_label45+token_ring.02.cil-1.c[383339,383352] [2021-12-22 12:36:51,988 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 12:36:52,029 INFO L208 MainTranslator]: Completed translation [2021-12-22 12:36:52,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:36:52 WrapperNode [2021-12-22 12:36:52,030 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 12:36:52,031 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 12:36:52,031 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 12:36:52,031 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 12:36:52,036 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:36:52" (1/1) ... [2021-12-22 12:36:52,131 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:36:52" (1/1) ... [2021-12-22 12:36:52,361 INFO L137 Inliner]: procedures = 48, calls = 47, calls flagged for inlining = 26, calls inlined = 26, statements flattened = 12619 [2021-12-22 12:36:52,361 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 12:36:52,362 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 12:36:52,362 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 12:36:52,362 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 12:36:52,368 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:36:52" (1/1) ... [2021-12-22 12:36:52,369 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:36:52" (1/1) ... [2021-12-22 12:36:52,470 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:36:52" (1/1) ... [2021-12-22 12:36:52,483 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:36:52" (1/1) ... [2021-12-22 12:36:52,703 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:36:52" (1/1) ... [2021-12-22 12:36:52,738 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:36:52" (1/1) ... [2021-12-22 12:36:52,778 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:36:52" (1/1) ... [2021-12-22 12:36:52,838 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 12:36:52,839 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 12:36:52,839 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 12:36:52,839 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 12:36:52,840 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:36:52" (1/1) ... [2021-12-22 12:36:52,845 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 12:36:52,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:36:52,862 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) [2021-12-22 12:36:52,869 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 [2021-12-22 12:36:52,905 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 12:36:52,905 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-12-22 12:36:52,905 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-12-22 12:36:52,905 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-12-22 12:36:52,905 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-12-22 12:36:52,905 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-22 12:36:52,906 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-22 12:36:52,906 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-12-22 12:36:52,906 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-12-22 12:36:52,906 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-12-22 12:36:52,906 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-12-22 12:36:52,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 12:36:52,906 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-12-22 12:36:52,906 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-12-22 12:36:52,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 12:36:52,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 12:36:52,997 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 12:36:52,999 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 12:36:57,733 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 12:36:57,759 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 12:36:57,759 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-12-22 12:36:57,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 12:36:57 BoogieIcfgContainer [2021-12-22 12:36:57,764 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 12:36:57,766 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 12:36:57,766 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 12:36:57,768 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 12:36:57,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 12:36:49" (1/3) ... [2021-12-22 12:36:57,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2858b383 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 12:36:57, skipping insertion in model container [2021-12-22 12:36:57,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:36:52" (2/3) ... [2021-12-22 12:36:57,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2858b383 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 12:36:57, skipping insertion in model container [2021-12-22 12:36:57,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 12:36:57" (3/3) ... [2021-12-22 12:36:57,772 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label45+token_ring.02.cil-1.c [2021-12-22 12:36:57,776 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 12:36:57,776 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-22 12:36:57,816 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 12:36:57,820 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 [2021-12-22 12:36:57,821 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-22 12:36:57,865 INFO L276 IsEmpty]: Start isEmpty. Operand has 2315 states, 2290 states have (on average 1.8572052401746726) internal successors, (4253), 2293 states have internal predecessors, (4253), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-22 12:36:57,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-22 12:36:57,871 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:36:57,872 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] [2021-12-22 12:36:57,873 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:36:57,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:36:57,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1170312139, now seen corresponding path program 1 times [2021-12-22 12:36:57,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:36:57,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886777309] [2021-12-22 12:36:57,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:36:57,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:36:57,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:36:58,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:36:58,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:36:58,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 12:36:58,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:36:58,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 12:36:58,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:36:58,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 12:36:58,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:36:58,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 12:36:58,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:36:58,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:36:58,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:36:58,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886777309] [2021-12-22 12:36:58,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886777309] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:36:58,120 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:36:58,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 12:36:58,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342478402] [2021-12-22 12:36:58,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:36:58,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 12:36:58,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:36:58,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 12:36:58,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 12:36:58,162 INFO L87 Difference]: Start difference. First operand has 2315 states, 2290 states have (on average 1.8572052401746726) internal successors, (4253), 2293 states have internal predecessors, (4253), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 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) [2021-12-22 12:36:58,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:36:58,930 INFO L93 Difference]: Finished difference Result 4802 states and 8845 transitions. [2021-12-22 12:36:58,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 12:36:58,932 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 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 68 [2021-12-22 12:36:58,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:36:58,957 INFO L225 Difference]: With dead ends: 4802 [2021-12-22 12:36:58,957 INFO L226 Difference]: Without dead ends: 2427 [2021-12-22 12:36:58,965 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 [2021-12-22 12:36:58,967 INFO L933 BasicCegarLoop]: 4248 mSDtfsCounter, 4428 mSDsluCounter, 12460 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4437 SdHoareTripleChecker+Valid, 16708 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 12:36:58,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4437 Valid, 16708 Invalid, 610 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [76 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 12:36:58,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2427 states. [2021-12-22 12:36:59,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2427 to 2364. [2021-12-22 12:36:59,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2364 states, 2322 states have (on average 1.8333333333333333) internal successors, (4257), 2325 states have internal predecessors, (4257), 27 states have call successors, (27), 12 states have call predecessors, (27), 13 states have return successors, (30), 27 states have call predecessors, (30), 27 states have call successors, (30) [2021-12-22 12:36:59,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2364 states to 2364 states and 4314 transitions. [2021-12-22 12:36:59,098 INFO L78 Accepts]: Start accepts. Automaton has 2364 states and 4314 transitions. Word has length 68 [2021-12-22 12:36:59,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:36:59,099 INFO L470 AbstractCegarLoop]: Abstraction has 2364 states and 4314 transitions. [2021-12-22 12:36:59,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 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) [2021-12-22 12:36:59,100 INFO L276 IsEmpty]: Start isEmpty. Operand 2364 states and 4314 transitions. [2021-12-22 12:36:59,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-22 12:36:59,102 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:36:59,103 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] [2021-12-22 12:36:59,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 12:36:59,103 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:36:59,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:36:59,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1597321137, now seen corresponding path program 1 times [2021-12-22 12:36:59,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:36:59,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256952578] [2021-12-22 12:36:59,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:36:59,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:36:59,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:36:59,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:36:59,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:36:59,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 12:36:59,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:36:59,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 12:36:59,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:36:59,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 12:36:59,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:36:59,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 12:36:59,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:36:59,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:36:59,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:36:59,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256952578] [2021-12-22 12:36:59,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256952578] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:36:59,211 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:36:59,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 12:36:59,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431848857] [2021-12-22 12:36:59,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:36:59,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 12:36:59,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:36:59,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 12:36:59,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 12:36:59,213 INFO L87 Difference]: Start difference. First operand 2364 states and 4314 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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) [2021-12-22 12:36:59,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:36:59,962 INFO L93 Difference]: Finished difference Result 2807 states and 4974 transitions. [2021-12-22 12:36:59,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 12:36:59,963 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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 68 [2021-12-22 12:36:59,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:36:59,972 INFO L225 Difference]: With dead ends: 2807 [2021-12-22 12:36:59,973 INFO L226 Difference]: Without dead ends: 2574 [2021-12-22 12:36:59,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-22 12:36:59,976 INFO L933 BasicCegarLoop]: 4246 mSDtfsCounter, 4351 mSDsluCounter, 16464 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4360 SdHoareTripleChecker+Valid, 20710 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 12:36:59,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4360 Valid, 20710 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 821 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 12:36:59,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2574 states. [2021-12-22 12:37:00,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2574 to 2473. [2021-12-22 12:37:00,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2473 states, 2413 states have (on average 1.8188976377952757) internal successors, (4389), 2417 states have internal predecessors, (4389), 38 states have call successors, (38), 18 states have call predecessors, (38), 20 states have return successors, (43), 39 states have call predecessors, (43), 38 states have call successors, (43) [2021-12-22 12:37:00,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2473 states to 2473 states and 4470 transitions. [2021-12-22 12:37:00,043 INFO L78 Accepts]: Start accepts. Automaton has 2473 states and 4470 transitions. Word has length 68 [2021-12-22 12:37:00,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:37:00,043 INFO L470 AbstractCegarLoop]: Abstraction has 2473 states and 4470 transitions. [2021-12-22 12:37:00,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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) [2021-12-22 12:37:00,044 INFO L276 IsEmpty]: Start isEmpty. Operand 2473 states and 4470 transitions. [2021-12-22 12:37:00,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-22 12:37:00,046 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:37:00,046 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] [2021-12-22 12:37:00,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 12:37:00,046 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:37:00,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:37:00,047 INFO L85 PathProgramCache]: Analyzing trace with hash -721302131, now seen corresponding path program 1 times [2021-12-22 12:37:00,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:37:00,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59889594] [2021-12-22 12:37:00,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:37:00,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:37:00,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:00,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:37:00,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:00,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 12:37:00,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:00,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 12:37:00,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:00,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 12:37:00,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:00,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 12:37:00,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:00,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:37:00,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:37:00,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59889594] [2021-12-22 12:37:00,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59889594] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:37:00,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:37:00,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 12:37:00,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504121026] [2021-12-22 12:37:00,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:37:00,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 12:37:00,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:37:00,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 12:37:00,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 12:37:00,152 INFO L87 Difference]: Start difference. First operand 2473 states and 4470 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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) [2021-12-22 12:37:00,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:37:00,752 INFO L93 Difference]: Finished difference Result 3193 states and 5538 transitions. [2021-12-22 12:37:00,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 12:37:00,752 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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 68 [2021-12-22 12:37:00,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:37:00,763 INFO L225 Difference]: With dead ends: 3193 [2021-12-22 12:37:00,763 INFO L226 Difference]: Without dead ends: 2851 [2021-12-22 12:37:00,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-22 12:37:00,770 INFO L933 BasicCegarLoop]: 4169 mSDtfsCounter, 4383 mSDsluCounter, 16279 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4392 SdHoareTripleChecker+Valid, 20448 SdHoareTripleChecker+Invalid, 815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 12:37:00,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4392 Valid, 20448 Invalid, 815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 737 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 12:37:00,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2851 states. [2021-12-22 12:37:00,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2851 to 2692. [2021-12-22 12:37:00,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2692 states, 2596 states have (on average 1.7927580893682589) internal successors, (4654), 2602 states have internal predecessors, (4654), 60 states have call successors, (60), 30 states have call predecessors, (60), 34 states have return successors, (73), 63 states have call predecessors, (73), 60 states have call successors, (73) [2021-12-22 12:37:00,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2692 states to 2692 states and 4787 transitions. [2021-12-22 12:37:00,843 INFO L78 Accepts]: Start accepts. Automaton has 2692 states and 4787 transitions. Word has length 68 [2021-12-22 12:37:00,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:37:00,843 INFO L470 AbstractCegarLoop]: Abstraction has 2692 states and 4787 transitions. [2021-12-22 12:37:00,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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) [2021-12-22 12:37:00,844 INFO L276 IsEmpty]: Start isEmpty. Operand 2692 states and 4787 transitions. [2021-12-22 12:37:00,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-22 12:37:00,847 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:37:00,848 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] [2021-12-22 12:37:00,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 12:37:00,848 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:37:00,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:37:00,848 INFO L85 PathProgramCache]: Analyzing trace with hash -277401457, now seen corresponding path program 1 times [2021-12-22 12:37:00,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:37:00,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771784856] [2021-12-22 12:37:00,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:37:00,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:37:00,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:00,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:37:00,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:00,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 12:37:00,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:00,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 12:37:00,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:00,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 12:37:00,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:00,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 12:37:00,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:00,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:37:00,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:37:00,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771784856] [2021-12-22 12:37:00,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771784856] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:37:00,965 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:37:00,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 12:37:00,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286281821] [2021-12-22 12:37:00,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:37:00,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 12:37:00,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:37:00,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 12:37:00,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 12:37:00,968 INFO L87 Difference]: Start difference. First operand 2692 states and 4787 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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) [2021-12-22 12:37:01,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:37:01,697 INFO L93 Difference]: Finished difference Result 4037 states and 6769 transitions. [2021-12-22 12:37:01,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 12:37:01,698 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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 68 [2021-12-22 12:37:01,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:37:01,709 INFO L225 Difference]: With dead ends: 4037 [2021-12-22 12:37:01,709 INFO L226 Difference]: Without dead ends: 3476 [2021-12-22 12:37:01,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-22 12:37:01,713 INFO L933 BasicCegarLoop]: 4255 mSDtfsCounter, 4357 mSDsluCounter, 16449 mSDsCounter, 0 mSdLazyCounter, 900 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4365 SdHoareTripleChecker+Valid, 20704 SdHoareTripleChecker+Invalid, 964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 12:37:01,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4365 Valid, 20704 Invalid, 964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 900 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 12:37:01,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3476 states. [2021-12-22 12:37:01,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3476 to 3104. [2021-12-22 12:37:01,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3104 states, 2940 states have (on average 1.7530612244897958) internal successors, (5154), 2950 states have internal predecessors, (5154), 100 states have call successors, (100), 54 states have call predecessors, (100), 62 states have return successors, (135), 107 states have call predecessors, (135), 100 states have call successors, (135) [2021-12-22 12:37:01,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3104 states to 3104 states and 5389 transitions. [2021-12-22 12:37:01,787 INFO L78 Accepts]: Start accepts. Automaton has 3104 states and 5389 transitions. Word has length 68 [2021-12-22 12:37:01,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:37:01,787 INFO L470 AbstractCegarLoop]: Abstraction has 3104 states and 5389 transitions. [2021-12-22 12:37:01,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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) [2021-12-22 12:37:01,788 INFO L276 IsEmpty]: Start isEmpty. Operand 3104 states and 5389 transitions. [2021-12-22 12:37:01,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-22 12:37:01,789 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:37:01,789 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] [2021-12-22 12:37:01,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 12:37:01,790 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:37:01,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:37:01,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1988979729, now seen corresponding path program 1 times [2021-12-22 12:37:01,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:37:01,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212082701] [2021-12-22 12:37:01,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:37:01,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:37:01,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:01,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:37:01,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:01,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 12:37:01,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:01,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 12:37:01,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:01,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 12:37:01,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:01,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 12:37:01,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:01,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:37:01,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:37:01,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212082701] [2021-12-22 12:37:01,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212082701] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:37:01,873 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:37:01,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 12:37:01,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894181462] [2021-12-22 12:37:01,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:37:01,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 12:37:01,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:37:01,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 12:37:01,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 12:37:01,875 INFO L87 Difference]: Start difference. First operand 3104 states and 5389 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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) [2021-12-22 12:37:02,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:37:02,617 INFO L93 Difference]: Finished difference Result 5435 states and 8809 transitions. [2021-12-22 12:37:02,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 12:37:02,618 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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 68 [2021-12-22 12:37:02,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:37:02,632 INFO L225 Difference]: With dead ends: 5435 [2021-12-22 12:37:02,632 INFO L226 Difference]: Without dead ends: 4462 [2021-12-22 12:37:02,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-22 12:37:02,637 INFO L933 BasicCegarLoop]: 4224 mSDtfsCounter, 4362 mSDsluCounter, 16452 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4374 SdHoareTripleChecker+Valid, 20676 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 12:37:02,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4374 Valid, 20676 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 12:37:02,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4462 states. [2021-12-22 12:37:02,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4462 to 3941. [2021-12-22 12:37:02,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3941 states, 3645 states have (on average 1.696570644718793) internal successors, (6184), 3663 states have internal predecessors, (6184), 176 states have call successors, (176), 102 states have call predecessors, (176), 118 states have return successors, (273), 191 states have call predecessors, (273), 176 states have call successors, (273) [2021-12-22 12:37:02,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3941 states to 3941 states and 6633 transitions. [2021-12-22 12:37:02,742 INFO L78 Accepts]: Start accepts. Automaton has 3941 states and 6633 transitions. Word has length 68 [2021-12-22 12:37:02,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:37:02,743 INFO L470 AbstractCegarLoop]: Abstraction has 3941 states and 6633 transitions. [2021-12-22 12:37:02,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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) [2021-12-22 12:37:02,743 INFO L276 IsEmpty]: Start isEmpty. Operand 3941 states and 6633 transitions. [2021-12-22 12:37:02,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-22 12:37:02,745 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:37:02,746 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] [2021-12-22 12:37:02,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 12:37:02,746 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:37:02,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:37:02,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1507899471, now seen corresponding path program 1 times [2021-12-22 12:37:02,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:37:02,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673320380] [2021-12-22 12:37:02,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:37:02,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:37:02,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:02,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:37:02,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:02,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 12:37:02,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:02,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 12:37:02,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:02,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 12:37:02,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:02,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 12:37:02,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:02,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:37:02,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:37:02,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673320380] [2021-12-22 12:37:02,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673320380] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:37:02,807 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:37:02,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 12:37:02,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929480617] [2021-12-22 12:37:02,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:37:02,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 12:37:02,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:37:02,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 12:37:02,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 12:37:02,808 INFO L87 Difference]: Start difference. First operand 3941 states and 6633 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 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) [2021-12-22 12:37:03,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:37:03,386 INFO L93 Difference]: Finished difference Result 7278 states and 11576 transitions. [2021-12-22 12:37:03,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 12:37:03,387 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 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 68 [2021-12-22 12:37:03,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:37:03,407 INFO L225 Difference]: With dead ends: 7278 [2021-12-22 12:37:03,408 INFO L226 Difference]: Without dead ends: 5469 [2021-12-22 12:37:03,415 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 [2021-12-22 12:37:03,416 INFO L933 BasicCegarLoop]: 4300 mSDtfsCounter, 4485 mSDsluCounter, 12257 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4510 SdHoareTripleChecker+Valid, 16557 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 12:37:03,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4510 Valid, 16557 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 12:37:03,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5469 states. [2021-12-22 12:37:03,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5469 to 4882. [2021-12-22 12:37:03,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4882 states, 4428 states have (on average 1.6456639566395663) internal successors, (7287), 4463 states have internal predecessors, (7287), 272 states have call successors, (272), 156 states have call predecessors, (272), 180 states have return successors, (397), 278 states have call predecessors, (397), 272 states have call successors, (397) [2021-12-22 12:37:03,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4882 states to 4882 states and 7956 transitions. [2021-12-22 12:37:03,541 INFO L78 Accepts]: Start accepts. Automaton has 4882 states and 7956 transitions. Word has length 68 [2021-12-22 12:37:03,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:37:03,542 INFO L470 AbstractCegarLoop]: Abstraction has 4882 states and 7956 transitions. [2021-12-22 12:37:03,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 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) [2021-12-22 12:37:03,542 INFO L276 IsEmpty]: Start isEmpty. Operand 4882 states and 7956 transitions. [2021-12-22 12:37:03,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-22 12:37:03,547 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:37:03,548 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:37:03,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 12:37:03,548 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:37:03,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:37:03,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1262348608, now seen corresponding path program 1 times [2021-12-22 12:37:03,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:37:03,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462080478] [2021-12-22 12:37:03,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:37:03,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:37:03,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:03,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:37:03,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:03,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 12:37:03,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:03,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 12:37:03,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:03,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 12:37:03,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:03,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 12:37:03,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:03,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-22 12:37:03,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:03,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:37:03,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:03,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-22 12:37:03,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:03,659 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-22 12:37:03,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:37:03,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462080478] [2021-12-22 12:37:03,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462080478] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 12:37:03,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905259298] [2021-12-22 12:37:03,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:37:03,669 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:37:03,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:37:03,670 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) [2021-12-22 12:37:03,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 12:37:03,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:03,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 12:37:03,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 12:37:03,994 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-22 12:37:03,994 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 12:37:03,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905259298] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:37:03,994 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 12:37:03,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-22 12:37:03,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770455510] [2021-12-22 12:37:03,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:37:03,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:37:03,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:37:03,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:37:03,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:37:03,999 INFO L87 Difference]: Start difference. First operand 4882 states and 7956 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 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) [2021-12-22 12:37:04,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:37:04,200 INFO L93 Difference]: Finished difference Result 10239 states and 15790 transitions. [2021-12-22 12:37:04,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:37:04,201 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 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 110 [2021-12-22 12:37:04,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:37:04,229 INFO L225 Difference]: With dead ends: 10239 [2021-12-22 12:37:04,230 INFO L226 Difference]: Without dead ends: 7489 [2021-12-22 12:37:04,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:37:04,238 INFO L933 BasicCegarLoop]: 4150 mSDtfsCounter, 4098 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4098 SdHoareTripleChecker+Valid, 4309 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 [2021-12-22 12:37:04,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4098 Valid, 4309 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:37:04,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7489 states. [2021-12-22 12:37:04,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7489 to 7435. [2021-12-22 12:37:04,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7435 states, 6567 states have (on average 1.5784985533729252) internal successors, (10366), 6635 states have internal predecessors, (10366), 510 states have call successors, (510), 308 states have call predecessors, (510), 356 states have return successors, (745), 507 states have call predecessors, (745), 510 states have call successors, (745) [2021-12-22 12:37:04,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7435 states to 7435 states and 11621 transitions. [2021-12-22 12:37:04,462 INFO L78 Accepts]: Start accepts. Automaton has 7435 states and 11621 transitions. Word has length 110 [2021-12-22 12:37:04,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:37:04,462 INFO L470 AbstractCegarLoop]: Abstraction has 7435 states and 11621 transitions. [2021-12-22 12:37:04,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 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) [2021-12-22 12:37:04,463 INFO L276 IsEmpty]: Start isEmpty. Operand 7435 states and 11621 transitions. [2021-12-22 12:37:04,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-22 12:37:04,471 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:37:04,471 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:37:04,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 12:37:04,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:37:04,688 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:37:04,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:37:04,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1095009120, now seen corresponding path program 1 times [2021-12-22 12:37:04,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:37:04,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674567552] [2021-12-22 12:37:04,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:37:04,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:37:04,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:04,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:37:04,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:04,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 12:37:04,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:04,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 12:37:04,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:04,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 12:37:04,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:04,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 12:37:04,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:04,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-22 12:37:04,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:04,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:37:04,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:04,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-22 12:37:04,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:04,799 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-22 12:37:04,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:37:04,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674567552] [2021-12-22 12:37:04,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674567552] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 12:37:04,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629721278] [2021-12-22 12:37:04,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:37:04,800 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:37:04,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:37:04,803 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) [2021-12-22 12:37:04,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 12:37:04,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:04,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 12:37:04,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 12:37:05,035 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-22 12:37:05,036 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 12:37:05,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629721278] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:37:05,036 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 12:37:05,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-22 12:37:05,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052519492] [2021-12-22 12:37:05,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:37:05,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:37:05,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:37:05,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:37:05,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:37:05,038 INFO L87 Difference]: Start difference. First operand 7435 states and 11621 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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) [2021-12-22 12:37:05,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:37:05,330 INFO L93 Difference]: Finished difference Result 17751 states and 26795 transitions. [2021-12-22 12:37:05,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:37:05,330 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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) Word has length 110 [2021-12-22 12:37:05,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:37:05,371 INFO L225 Difference]: With dead ends: 17751 [2021-12-22 12:37:05,371 INFO L226 Difference]: Without dead ends: 12449 [2021-12-22 12:37:05,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:37:05,389 INFO L933 BasicCegarLoop]: 4299 mSDtfsCounter, 154 mSDsluCounter, 4138 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 8437 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:37:05,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 8437 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:37:05,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12449 states. [2021-12-22 12:37:05,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12449 to 12449. [2021-12-22 12:37:05,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12449 states, 10768 states have (on average 1.5169947994056463) internal successors, (16335), 10885 states have internal predecessors, (16335), 975 states have call successors, (975), 608 states have call predecessors, (975), 704 states have return successors, (1596), 987 states have call predecessors, (1596), 975 states have call successors, (1596) [2021-12-22 12:37:05,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12449 states to 12449 states and 18906 transitions. [2021-12-22 12:37:05,814 INFO L78 Accepts]: Start accepts. Automaton has 12449 states and 18906 transitions. Word has length 110 [2021-12-22 12:37:05,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:37:05,814 INFO L470 AbstractCegarLoop]: Abstraction has 12449 states and 18906 transitions. [2021-12-22 12:37:05,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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) [2021-12-22 12:37:05,814 INFO L276 IsEmpty]: Start isEmpty. Operand 12449 states and 18906 transitions. [2021-12-22 12:37:05,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-12-22 12:37:05,848 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:37:05,848 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-22 12:37:05,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 12:37:06,063 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,SelfDestructingSolverStorable7 [2021-12-22 12:37:06,063 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:37:06,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:37:06,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1627368555, now seen corresponding path program 1 times [2021-12-22 12:37:06,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:37:06,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645579259] [2021-12-22 12:37:06,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:37:06,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:37:06,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:06,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:37:06,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:06,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 12:37:06,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:06,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 12:37:06,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:06,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 12:37:06,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:06,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 12:37:06,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:06,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-22 12:37:06,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:06,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:37:06,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:06,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-22 12:37:06,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:06,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:37:06,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:06,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-22 12:37:06,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:06,174 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-22 12:37:06,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:37:06,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645579259] [2021-12-22 12:37:06,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645579259] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 12:37:06,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210168770] [2021-12-22 12:37:06,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:37:06,176 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:37:06,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:37:06,177 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) [2021-12-22 12:37:06,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 12:37:06,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:06,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 12:37:06,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 12:37:06,480 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-22 12:37:06,480 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 12:37:06,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210168770] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:37:06,481 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 12:37:06,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-22 12:37:06,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841237921] [2021-12-22 12:37:06,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:37:06,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:37:06,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:37:06,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:37:06,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:37:06,482 INFO L87 Difference]: Start difference. First operand 12449 states and 18906 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-22 12:37:07,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:37:07,001 INFO L93 Difference]: Finished difference Result 32641 states and 48463 transitions. [2021-12-22 12:37:07,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:37:07,002 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 142 [2021-12-22 12:37:07,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:37:07,076 INFO L225 Difference]: With dead ends: 32641 [2021-12-22 12:37:07,076 INFO L226 Difference]: Without dead ends: 22329 [2021-12-22 12:37:07,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:37:07,111 INFO L933 BasicCegarLoop]: 4159 mSDtfsCounter, 4056 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4056 SdHoareTripleChecker+Valid, 4318 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 [2021-12-22 12:37:07,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4056 Valid, 4318 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:37:07,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22329 states. [2021-12-22 12:37:07,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22329 to 22119. [2021-12-22 12:37:07,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22119 states, 18858 states have (on average 1.4761374482978047) internal successors, (27837), 19089 states have internal predecessors, (27837), 1869 states have call successors, (1869), 1198 states have call predecessors, (1869), 1390 states have return successors, (3038), 1863 states have call predecessors, (3038), 1869 states have call successors, (3038) [2021-12-22 12:37:07,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22119 states to 22119 states and 32744 transitions. [2021-12-22 12:37:07,721 INFO L78 Accepts]: Start accepts. Automaton has 22119 states and 32744 transitions. Word has length 142 [2021-12-22 12:37:07,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:37:07,722 INFO L470 AbstractCegarLoop]: Abstraction has 22119 states and 32744 transitions. [2021-12-22 12:37:07,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-22 12:37:07,722 INFO L276 IsEmpty]: Start isEmpty. Operand 22119 states and 32744 transitions. [2021-12-22 12:37:07,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-22 12:37:07,768 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:37:07,768 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-22 12:37:07,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 12:37:07,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:37:07,973 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:37:07,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:37:07,973 INFO L85 PathProgramCache]: Analyzing trace with hash -2072719309, now seen corresponding path program 1 times [2021-12-22 12:37:07,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:37:07,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653678847] [2021-12-22 12:37:07,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:37:07,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:37:07,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:07,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:37:07,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:08,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 12:37:08,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:08,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 12:37:08,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:08,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 12:37:08,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:08,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 12:37:08,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:08,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-22 12:37:08,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:08,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-22 12:37:08,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:08,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:37:08,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:08,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-22 12:37:08,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:08,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:37:08,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:08,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-22 12:37:08,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:08,087 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-22 12:37:08,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:37:08,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653678847] [2021-12-22 12:37:08,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653678847] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 12:37:08,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899228284] [2021-12-22 12:37:08,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:37:08,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:37:08,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:37:08,104 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) [2021-12-22 12:37:08,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 12:37:08,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:08,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 12:37:08,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 12:37:08,469 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-22 12:37:08,470 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 12:37:08,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899228284] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:37:08,470 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 12:37:08,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-22 12:37:08,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662649295] [2021-12-22 12:37:08,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:37:08,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:37:08,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:37:08,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:37:08,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:37:08,488 INFO L87 Difference]: Start difference. First operand 22119 states and 32744 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-22 12:37:09,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:37:09,122 INFO L93 Difference]: Finished difference Result 44457 states and 65784 transitions. [2021-12-22 12:37:09,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:37:09,122 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 159 [2021-12-22 12:37:09,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:37:09,196 INFO L225 Difference]: With dead ends: 44457 [2021-12-22 12:37:09,197 INFO L226 Difference]: Without dead ends: 24473 [2021-12-22 12:37:09,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:37:09,247 INFO L933 BasicCegarLoop]: 4137 mSDtfsCounter, 4075 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4075 SdHoareTripleChecker+Valid, 4171 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:37:09,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4075 Valid, 4171 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:37:09,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24473 states. [2021-12-22 12:37:10,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24473 to 24473. [2021-12-22 12:37:10,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24473 states, 21000 states have (on average 1.4191904761904761) internal successors, (29803), 21231 states have internal predecessors, (29803), 1923 states have call successors, (1923), 1356 states have call predecessors, (1923), 1548 states have return successors, (3106), 1917 states have call predecessors, (3106), 1923 states have call successors, (3106) [2021-12-22 12:37:10,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24473 states to 24473 states and 34832 transitions. [2021-12-22 12:37:10,083 INFO L78 Accepts]: Start accepts. Automaton has 24473 states and 34832 transitions. Word has length 159 [2021-12-22 12:37:10,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:37:10,084 INFO L470 AbstractCegarLoop]: Abstraction has 24473 states and 34832 transitions. [2021-12-22 12:37:10,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-22 12:37:10,084 INFO L276 IsEmpty]: Start isEmpty. Operand 24473 states and 34832 transitions. [2021-12-22 12:37:10,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-22 12:37:10,133 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:37:10,133 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-22 12:37:10,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 12:37:10,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:37:10,357 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:37:10,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:37:10,357 INFO L85 PathProgramCache]: Analyzing trace with hash -830749066, now seen corresponding path program 1 times [2021-12-22 12:37:10,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:37:10,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17257278] [2021-12-22 12:37:10,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:37:10,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:37:10,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:10,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:37:10,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:10,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 12:37:10,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:10,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 12:37:10,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:10,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 12:37:10,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:10,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 12:37:10,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:10,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-22 12:37:10,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:10,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-22 12:37:10,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:10,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:37:10,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:10,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-22 12:37:10,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:10,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:37:10,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:10,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-22 12:37:10,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:10,453 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-22 12:37:10,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:37:10,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17257278] [2021-12-22 12:37:10,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17257278] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 12:37:10,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459149705] [2021-12-22 12:37:10,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:37:10,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:37:10,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:37:10,469 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 12:37:10,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 12:37:10,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:10,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 12:37:10,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 12:37:10,700 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-22 12:37:10,700 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 12:37:10,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459149705] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:37:10,700 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 12:37:10,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-22 12:37:10,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619730143] [2021-12-22 12:37:10,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:37:10,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:37:10,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:37:10,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:37:10,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:37:10,703 INFO L87 Difference]: Start difference. First operand 24473 states and 34832 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-22 12:37:11,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:37:11,458 INFO L93 Difference]: Finished difference Result 41324 states and 58008 transitions. [2021-12-22 12:37:11,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:37:11,459 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 159 [2021-12-22 12:37:11,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:37:11,536 INFO L225 Difference]: With dead ends: 41324 [2021-12-22 12:37:11,536 INFO L226 Difference]: Without dead ends: 26013 [2021-12-22 12:37:11,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:37:11,560 INFO L933 BasicCegarLoop]: 4159 mSDtfsCounter, 4088 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4088 SdHoareTripleChecker+Valid, 4325 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:37:11,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4088 Valid, 4325 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:37:11,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26013 states. [2021-12-22 12:37:12,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26013 to 25873. [2021-12-22 12:37:12,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25873 states, 22288 states have (on average 1.3940685570710696) internal successors, (31071), 22519 states have internal predecessors, (31071), 1943 states have call successors, (1943), 1448 states have call predecessors, (1943), 1640 states have return successors, (3218), 1937 states have call predecessors, (3218), 1943 states have call successors, (3218) [2021-12-22 12:37:12,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25873 states to 25873 states and 36232 transitions. [2021-12-22 12:37:12,529 INFO L78 Accepts]: Start accepts. Automaton has 25873 states and 36232 transitions. Word has length 159 [2021-12-22 12:37:12,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:37:12,530 INFO L470 AbstractCegarLoop]: Abstraction has 25873 states and 36232 transitions. [2021-12-22 12:37:12,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-22 12:37:12,530 INFO L276 IsEmpty]: Start isEmpty. Operand 25873 states and 36232 transitions. [2021-12-22 12:37:12,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-22 12:37:12,569 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:37:12,569 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-22 12:37:12,589 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-22 12:37:12,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-22 12:37:12,783 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:37:12,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:37:12,784 INFO L85 PathProgramCache]: Analyzing trace with hash -609804947, now seen corresponding path program 1 times [2021-12-22 12:37:12,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:37:12,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764037584] [2021-12-22 12:37:12,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:37:12,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:37:12,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:12,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:37:12,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:12,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 12:37:12,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:12,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 12:37:12,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:12,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 12:37:12,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:12,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 12:37:12,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:12,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-22 12:37:12,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:12,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-22 12:37:12,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:12,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:37:12,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:12,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-22 12:37:12,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:12,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:37:12,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:12,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-22 12:37:12,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:12,874 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-22 12:37:12,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:37:12,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764037584] [2021-12-22 12:37:12,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764037584] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 12:37:12,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844724618] [2021-12-22 12:37:12,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:37:12,875 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:37:12,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:37:12,877 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 12:37:12,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 12:37:12,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:12,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 12:37:12,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 12:37:13,193 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-22 12:37:13,193 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 12:37:13,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844724618] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:37:13,194 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 12:37:13,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-22 12:37:13,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973094835] [2021-12-22 12:37:13,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:37:13,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:37:13,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:37:13,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:37:13,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:37:13,197 INFO L87 Difference]: Start difference. First operand 25873 states and 36232 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-22 12:37:14,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:37:14,434 INFO L93 Difference]: Finished difference Result 70245 states and 97750 transitions. [2021-12-22 12:37:14,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:37:14,435 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 160 [2021-12-22 12:37:14,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:37:14,606 INFO L225 Difference]: With dead ends: 70245 [2021-12-22 12:37:14,606 INFO L226 Difference]: Without dead ends: 46511 [2021-12-22 12:37:14,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:37:14,666 INFO L933 BasicCegarLoop]: 4172 mSDtfsCounter, 4102 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4102 SdHoareTripleChecker+Valid, 4334 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:37:14,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4102 Valid, 4334 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:37:14,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46511 states. [2021-12-22 12:37:16,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46511 to 45781. [2021-12-22 12:37:16,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45781 states, 39030 states have (on average 1.3636945939021266) internal successors, (53225), 39491 states have internal predecessors, (53225), 3677 states have call successors, (3677), 2688 states have call predecessors, (3677), 3072 states have return successors, (7178), 3665 states have call predecessors, (7178), 3677 states have call successors, (7178) [2021-12-22 12:37:16,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45781 states to 45781 states and 64080 transitions. [2021-12-22 12:37:16,279 INFO L78 Accepts]: Start accepts. Automaton has 45781 states and 64080 transitions. Word has length 160 [2021-12-22 12:37:16,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:37:16,279 INFO L470 AbstractCegarLoop]: Abstraction has 45781 states and 64080 transitions. [2021-12-22 12:37:16,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-22 12:37:16,280 INFO L276 IsEmpty]: Start isEmpty. Operand 45781 states and 64080 transitions. [2021-12-22 12:37:16,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-22 12:37:16,363 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:37:16,364 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-22 12:37:16,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-22 12:37:16,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:37:16,583 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:37:16,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:37:16,718 INFO L85 PathProgramCache]: Analyzing trace with hash -757749610, now seen corresponding path program 1 times [2021-12-22 12:37:16,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:37:16,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707709367] [2021-12-22 12:37:16,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:37:16,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:37:16,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:16,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:37:16,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:16,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 12:37:16,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:16,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 12:37:16,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:16,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 12:37:16,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:16,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 12:37:16,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:16,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-22 12:37:16,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:16,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-22 12:37:16,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:16,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:37:16,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:16,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-22 12:37:16,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:16,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:37:16,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:16,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-22 12:37:16,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:16,799 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-22 12:37:16,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:37:16,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707709367] [2021-12-22 12:37:16,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707709367] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 12:37:16,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030966989] [2021-12-22 12:37:16,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:37:16,800 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:37:16,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:37:16,801 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 12:37:16,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-22 12:37:16,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:16,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 12:37:16,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 12:37:17,095 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-22 12:37:17,095 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 12:37:17,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030966989] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:37:17,096 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 12:37:17,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-22 12:37:17,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494870530] [2021-12-22 12:37:17,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:37:17,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:37:17,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:37:17,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:37:17,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:37:17,097 INFO L87 Difference]: Start difference. First operand 45781 states and 64080 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-22 12:37:18,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:37:18,217 INFO L93 Difference]: Finished difference Result 75161 states and 105873 transitions. [2021-12-22 12:37:18,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:37:18,218 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 160 [2021-12-22 12:37:18,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:37:18,346 INFO L225 Difference]: With dead ends: 75161 [2021-12-22 12:37:18,347 INFO L226 Difference]: Without dead ends: 40527 [2021-12-22 12:37:18,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:37:18,429 INFO L933 BasicCegarLoop]: 4136 mSDtfsCounter, 4089 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4089 SdHoareTripleChecker+Valid, 4169 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:37:18,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4089 Valid, 4169 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:37:18,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40527 states. [2021-12-22 12:37:19,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40527 to 29943. [2021-12-22 12:37:19,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29943 states, 25784 states have (on average 1.3390862550418865) internal successors, (34527), 26025 states have internal predecessors, (34527), 2245 states have call successors, (2245), 1720 states have call predecessors, (2245), 1912 states have return successors, (3934), 2229 states have call predecessors, (3934), 2245 states have call successors, (3934) [2021-12-22 12:37:20,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29943 states to 29943 states and 40706 transitions. [2021-12-22 12:37:20,225 INFO L78 Accepts]: Start accepts. Automaton has 29943 states and 40706 transitions. Word has length 160 [2021-12-22 12:37:20,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:37:20,225 INFO L470 AbstractCegarLoop]: Abstraction has 29943 states and 40706 transitions. [2021-12-22 12:37:20,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-22 12:37:20,225 INFO L276 IsEmpty]: Start isEmpty. Operand 29943 states and 40706 transitions. [2021-12-22 12:37:20,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-22 12:37:20,259 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:37:20,259 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-22 12:37:20,278 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-22 12:37:20,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:37:20,479 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:37:20,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:37:20,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1793650834, now seen corresponding path program 1 times [2021-12-22 12:37:20,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:37:20,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528873921] [2021-12-22 12:37:20,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:37:20,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:37:20,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:20,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:37:20,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:20,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 12:37:20,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:20,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 12:37:20,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:20,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 12:37:20,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:20,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 12:37:20,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:20,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-22 12:37:20,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:20,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-22 12:37:20,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:20,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:37:20,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:20,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-22 12:37:20,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:20,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:37:20,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:20,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-22 12:37:20,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:20,568 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-22 12:37:20,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:37:20,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528873921] [2021-12-22 12:37:20,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528873921] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 12:37:20,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656527938] [2021-12-22 12:37:20,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:37:20,568 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:37:20,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:37:20,569 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 12:37:20,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-22 12:37:20,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:20,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 12:37:20,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 12:37:20,868 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-22 12:37:20,869 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 12:37:20,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656527938] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:37:20,869 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 12:37:20,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-22 12:37:20,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109340814] [2021-12-22 12:37:20,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:37:20,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:37:20,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:37:20,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:37:20,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:37:20,870 INFO L87 Difference]: Start difference. First operand 29943 states and 40706 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-22 12:37:22,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:37:22,692 INFO L93 Difference]: Finished difference Result 82801 states and 112154 transitions. [2021-12-22 12:37:22,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:37:22,692 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 160 [2021-12-22 12:37:22,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:37:22,830 INFO L225 Difference]: With dead ends: 82801 [2021-12-22 12:37:22,830 INFO L226 Difference]: Without dead ends: 55005 [2021-12-22 12:37:22,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:37:22,873 INFO L933 BasicCegarLoop]: 4180 mSDtfsCounter, 4098 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4098 SdHoareTripleChecker+Valid, 4341 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:37:22,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4098 Valid, 4341 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:37:22,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55005 states. [2021-12-22 12:37:25,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55005 to 53491. [2021-12-22 12:37:25,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53491 states, 45624 states have (on average 1.3054751884972822) internal successors, (59561), 46105 states have internal predecessors, (59561), 4265 states have call successors, (4265), 3216 states have call predecessors, (4265), 3600 states have return successors, (8740), 4233 states have call predecessors, (8740), 4265 states have call successors, (8740) [2021-12-22 12:37:25,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53491 states to 53491 states and 72566 transitions. [2021-12-22 12:37:25,197 INFO L78 Accepts]: Start accepts. Automaton has 53491 states and 72566 transitions. Word has length 160 [2021-12-22 12:37:25,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:37:25,198 INFO L470 AbstractCegarLoop]: Abstraction has 53491 states and 72566 transitions. [2021-12-22 12:37:25,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-22 12:37:25,198 INFO L276 IsEmpty]: Start isEmpty. Operand 53491 states and 72566 transitions. [2021-12-22 12:37:25,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-22 12:37:25,264 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:37:25,264 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-22 12:37:25,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-22 12:37:25,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-22 12:37:25,468 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:37:25,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:37:25,468 INFO L85 PathProgramCache]: Analyzing trace with hash -392345557, now seen corresponding path program 1 times [2021-12-22 12:37:25,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:37:25,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796769798] [2021-12-22 12:37:25,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:37:25,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:37:25,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:25,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:37:25,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:25,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 12:37:25,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:25,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 12:37:25,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:25,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 12:37:25,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:25,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 12:37:25,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:25,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-22 12:37:25,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:25,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-22 12:37:25,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:25,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:37:25,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:25,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-22 12:37:25,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:25,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:37:25,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:25,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-22 12:37:25,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:25,630 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-12-22 12:37:25,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:37:25,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796769798] [2021-12-22 12:37:25,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796769798] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:37:25,631 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:37:25,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 12:37:25,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133352996] [2021-12-22 12:37:25,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:37:25,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 12:37:25,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:37:25,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 12:37:25,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 12:37:25,632 INFO L87 Difference]: Start difference. First operand 53491 states and 72566 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-22 12:37:27,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:37:27,716 INFO L93 Difference]: Finished difference Result 102539 states and 136687 transitions. [2021-12-22 12:37:27,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 12:37:27,717 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 160 [2021-12-22 12:37:27,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:37:27,963 INFO L225 Difference]: With dead ends: 102539 [2021-12-22 12:37:27,963 INFO L226 Difference]: Without dead ends: 51193 [2021-12-22 12:37:28,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:37:28,026 INFO L933 BasicCegarLoop]: 4136 mSDtfsCounter, 282 mSDsluCounter, 12008 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 16144 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 12:37:28,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 16144 Invalid, 207 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [43 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 12:37:28,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51193 states. [2021-12-22 12:37:29,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51193 to 48475. [2021-12-22 12:37:30,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48475 states, 41692 states have (on average 1.3054542837954524) internal successors, (54427), 42585 states have internal predecessors, (54427), 3253 states have call successors, (3253), 2472 states have call predecessors, (3253), 3528 states have return successors, (7133), 3449 states have call predecessors, (7133), 3253 states have call successors, (7133) [2021-12-22 12:37:30,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48475 states to 48475 states and 64813 transitions. [2021-12-22 12:37:30,218 INFO L78 Accepts]: Start accepts. Automaton has 48475 states and 64813 transitions. Word has length 160 [2021-12-22 12:37:30,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:37:30,219 INFO L470 AbstractCegarLoop]: Abstraction has 48475 states and 64813 transitions. [2021-12-22 12:37:30,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-22 12:37:30,219 INFO L276 IsEmpty]: Start isEmpty. Operand 48475 states and 64813 transitions. [2021-12-22 12:37:30,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-22 12:37:30,278 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:37:30,278 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-22 12:37:30,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-22 12:37:30,278 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:37:30,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:37:30,279 INFO L85 PathProgramCache]: Analyzing trace with hash -809968940, now seen corresponding path program 1 times [2021-12-22 12:37:30,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:37:30,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098389294] [2021-12-22 12:37:30,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:37:30,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:37:30,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:30,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:37:30,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:30,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 12:37:30,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:30,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 12:37:30,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:30,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 12:37:30,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:30,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 12:37:30,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:30,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-22 12:37:30,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:30,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-22 12:37:30,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:30,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:37:30,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:30,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-22 12:37:30,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:30,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:37:30,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:30,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-22 12:37:30,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:30,342 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-22 12:37:30,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:37:30,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098389294] [2021-12-22 12:37:30,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098389294] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:37:30,342 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:37:30,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 12:37:30,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310809852] [2021-12-22 12:37:30,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:37:30,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 12:37:30,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:37:30,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 12:37:30,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 12:37:30,348 INFO L87 Difference]: Start difference. First operand 48475 states and 64813 transitions. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-22 12:37:32,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:37:32,293 INFO L93 Difference]: Finished difference Result 86015 states and 113686 transitions. [2021-12-22 12:37:32,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 12:37:32,295 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 160 [2021-12-22 12:37:32,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:37:32,394 INFO L225 Difference]: With dead ends: 86015 [2021-12-22 12:37:32,394 INFO L226 Difference]: Without dead ends: 39677 [2021-12-22 12:37:32,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:37:32,448 INFO L933 BasicCegarLoop]: 4135 mSDtfsCounter, 282 mSDsluCounter, 12007 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 16142 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 12:37:32,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 16142 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 12:37:32,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39677 states. [2021-12-22 12:37:33,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39677 to 37027. [2021-12-22 12:37:33,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37027 states, 31990 states have (on average 1.3210690840887778) internal successors, (42261), 32627 states have internal predecessors, (42261), 2427 states have call successors, (2427), 1856 states have call predecessors, (2427), 2608 states have return successors, (4967), 2559 states have call predecessors, (4967), 2427 states have call successors, (4967) [2021-12-22 12:37:34,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37027 states to 37027 states and 49655 transitions. [2021-12-22 12:37:34,161 INFO L78 Accepts]: Start accepts. Automaton has 37027 states and 49655 transitions. Word has length 160 [2021-12-22 12:37:34,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:37:34,161 INFO L470 AbstractCegarLoop]: Abstraction has 37027 states and 49655 transitions. [2021-12-22 12:37:34,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-22 12:37:34,161 INFO L276 IsEmpty]: Start isEmpty. Operand 37027 states and 49655 transitions. [2021-12-22 12:37:34,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-22 12:37:34,206 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:37:34,206 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-22 12:37:34,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-22 12:37:34,206 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:37:34,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:37:34,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1498858591, now seen corresponding path program 1 times [2021-12-22 12:37:34,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:37:34,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677421190] [2021-12-22 12:37:34,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:37:34,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:37:34,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:34,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:37:34,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:34,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 12:37:34,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:34,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 12:37:34,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:34,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 12:37:34,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:34,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 12:37:34,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:34,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-22 12:37:34,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:34,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-22 12:37:34,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:34,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:37:34,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:34,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-22 12:37:34,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:34,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:37:34,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:34,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-12-22 12:37:34,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:34,304 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-22 12:37:34,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:37:34,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677421190] [2021-12-22 12:37:34,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677421190] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 12:37:34,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529666524] [2021-12-22 12:37:34,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:37:34,304 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:37:34,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:37:34,307 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 12:37:34,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-22 12:37:34,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:34,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 12:37:34,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 12:37:34,582 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-22 12:37:34,582 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 12:37:34,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529666524] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:37:34,582 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 12:37:34,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-22 12:37:34,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710635459] [2021-12-22 12:37:34,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:37:34,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:37:34,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:37:34,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:37:34,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:37:34,584 INFO L87 Difference]: Start difference. First operand 37027 states and 49655 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-22 12:37:36,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:37:36,184 INFO L93 Difference]: Finished difference Result 60935 states and 83299 transitions. [2021-12-22 12:37:36,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:37:36,185 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 162 [2021-12-22 12:37:36,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:37:36,277 INFO L225 Difference]: With dead ends: 60935 [2021-12-22 12:37:36,277 INFO L226 Difference]: Without dead ends: 37197 [2021-12-22 12:37:36,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:37:36,322 INFO L933 BasicCegarLoop]: 4267 mSDtfsCounter, 130 mSDsluCounter, 4115 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 8382 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:37:36,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 8382 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:37:36,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37197 states. [2021-12-22 12:37:37,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37197 to 37027. [2021-12-22 12:37:37,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37027 states, 31990 states have (on average 1.2994998437011567) internal successors, (41571), 32627 states have internal predecessors, (41571), 2427 states have call successors, (2427), 1856 states have call predecessors, (2427), 2608 states have return successors, (4967), 2559 states have call predecessors, (4967), 2427 states have call successors, (4967) [2021-12-22 12:37:38,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37027 states to 37027 states and 48965 transitions. [2021-12-22 12:37:38,033 INFO L78 Accepts]: Start accepts. Automaton has 37027 states and 48965 transitions. Word has length 162 [2021-12-22 12:37:38,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:37:38,033 INFO L470 AbstractCegarLoop]: Abstraction has 37027 states and 48965 transitions. [2021-12-22 12:37:38,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-22 12:37:38,033 INFO L276 IsEmpty]: Start isEmpty. Operand 37027 states and 48965 transitions. [2021-12-22 12:37:38,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-22 12:37:38,084 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:37:38,084 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-22 12:37:38,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-22 12:37:38,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-22 12:37:38,285 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:37:38,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:37:38,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1871536255, now seen corresponding path program 1 times [2021-12-22 12:37:38,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:37:38,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337815240] [2021-12-22 12:37:38,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:37:38,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:37:38,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:38,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:37:38,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:38,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 12:37:38,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:38,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 12:37:38,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:38,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 12:37:38,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:38,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 12:37:38,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:38,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-22 12:37:38,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:38,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-22 12:37:38,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:38,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:37:38,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:38,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-22 12:37:38,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:38,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:37:38,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:38,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-12-22 12:37:38,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:38,361 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-22 12:37:38,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:37:38,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337815240] [2021-12-22 12:37:38,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337815240] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 12:37:38,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489324676] [2021-12-22 12:37:38,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:37:38,362 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:37:38,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:37:38,363 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 12:37:38,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-22 12:37:38,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:38,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 12:37:38,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 12:37:38,607 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-22 12:37:38,608 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 12:37:38,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489324676] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:37:38,608 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 12:37:38,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-22 12:37:38,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395146514] [2021-12-22 12:37:38,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:37:38,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:37:38,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:37:38,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:37:38,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:37:38,611 INFO L87 Difference]: Start difference. First operand 37027 states and 48965 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10)