./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/Problem05_label42+token_ring.03.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/Problem05_label42+token_ring.03.cil-2.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 416d3b74bdc0e830f927a3018e8747e6a310d2a238902dccf396a8065404f3af --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 18:51:35,063 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 18:51:35,092 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 18:51:35,135 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 18:51:35,135 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 18:51:35,138 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 18:51:35,140 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 18:51:35,142 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 18:51:35,144 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 18:51:35,148 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 18:51:35,149 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 18:51:35,150 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 18:51:35,151 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 18:51:35,153 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 18:51:35,154 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 18:51:35,160 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 18:51:35,161 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 18:51:35,162 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 18:51:35,164 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 18:51:35,169 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 18:51:35,171 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 18:51:35,172 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 18:51:35,173 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 18:51:35,174 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 18:51:35,180 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 18:51:35,180 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 18:51:35,180 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 18:51:35,182 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 18:51:35,182 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 18:51:35,183 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 18:51:35,183 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 18:51:35,184 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 18:51:35,185 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 18:51:35,186 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 18:51:35,187 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 18:51:35,187 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 18:51:35,188 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 18:51:35,188 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 18:51:35,188 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 18:51:35,190 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 18:51:35,190 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 18:51:35,192 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 18:51:35,223 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 18:51:35,224 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 18:51:35,224 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 18:51:35,224 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 18:51:35,225 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 18:51:35,225 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 18:51:35,226 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 18:51:35,226 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 18:51:35,226 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 18:51:35,227 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 18:51:35,227 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 18:51:35,228 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 18:51:35,228 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 18:51:35,228 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 18:51:35,228 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 18:51:35,228 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 18:51:35,229 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 18:51:35,229 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 18:51:35,229 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 18:51:35,229 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 18:51:35,229 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 18:51:35,229 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 18:51:35,230 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 18:51:35,230 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 18:51:35,230 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 18:51:35,230 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 18:51:35,230 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 18:51:35,231 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 18:51:35,231 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 18:51:35,231 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 18:51:35,231 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 18:51:35,231 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 18:51:35,232 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 18:51:35,232 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 18:51:35,232 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 416d3b74bdc0e830f927a3018e8747e6a310d2a238902dccf396a8065404f3af [2021-12-17 18:51:35,452 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 18:51:35,476 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 18:51:35,479 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 18:51:35,480 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 18:51:35,480 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 18:51:35,482 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/Problem05_label42+token_ring.03.cil-2.c [2021-12-17 18:51:35,561 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/134a8b6f5/a71c9aa4f7ce4002b5b23aad34159dd9/FLAG353396398 [2021-12-17 18:51:36,419 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 18:51:36,420 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/Problem05_label42+token_ring.03.cil-2.c [2021-12-17 18:51:36,465 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/134a8b6f5/a71c9aa4f7ce4002b5b23aad34159dd9/FLAG353396398 [2021-12-17 18:51:36,894 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/134a8b6f5/a71c9aa4f7ce4002b5b23aad34159dd9 [2021-12-17 18:51:36,896 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 18:51:36,897 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 18:51:36,898 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 18:51:36,898 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 18:51:36,906 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 18:51:36,906 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 06:51:36" (1/1) ... [2021-12-17 18:51:36,907 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b44140b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:51:36, skipping insertion in model container [2021-12-17 18:51:36,908 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 06:51:36" (1/1) ... [2021-12-17 18:51:36,913 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 18:51:37,106 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 18:51:38,541 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_label42+token_ring.03.cil-2.c[378560,378573] [2021-12-17 18:51:38,567 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_label42+token_ring.03.cil-2.c[383339,383352] [2021-12-17 18:51:38,719 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 18:51:38,728 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 18:51:39,457 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_label42+token_ring.03.cil-2.c[378560,378573] [2021-12-17 18:51:39,464 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_label42+token_ring.03.cil-2.c[383339,383352] [2021-12-17 18:51:39,499 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 18:51:39,552 INFO L208 MainTranslator]: Completed translation [2021-12-17 18:51:39,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:51:39 WrapperNode [2021-12-17 18:51:39,553 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 18:51:39,554 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 18:51:39,554 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 18:51:39,555 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 18:51:39,560 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:51:39" (1/1) ... [2021-12-17 18:51:39,648 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:51:39" (1/1) ... [2021-12-17 18:51:40,187 INFO L137 Inliner]: procedures = 50, calls = 50, calls flagged for inlining = 28, calls inlined = 28, statements flattened = 12677 [2021-12-17 18:51:40,188 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 18:51:40,189 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 18:51:40,189 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 18:51:40,189 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 18:51:40,197 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:51:39" (1/1) ... [2021-12-17 18:51:40,197 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:51:39" (1/1) ... [2021-12-17 18:51:40,269 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:51:39" (1/1) ... [2021-12-17 18:51:40,270 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:51:39" (1/1) ... [2021-12-17 18:51:40,446 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:51:39" (1/1) ... [2021-12-17 18:51:40,562 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:51:39" (1/1) ... [2021-12-17 18:51:40,591 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:51:39" (1/1) ... [2021-12-17 18:51:40,689 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 18:51:40,690 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 18:51:40,690 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 18:51:40,690 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 18:51:40,708 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:51:39" (1/1) ... [2021-12-17 18:51:40,714 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 18:51:40,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 18:51:40,765 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 18:51:40,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 18:51:40,880 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 18:51:40,880 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-12-17 18:51:40,881 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-12-17 18:51:40,881 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-17 18:51:40,881 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-17 18:51:40,881 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-12-17 18:51:40,881 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-12-17 18:51:40,881 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-12-17 18:51:40,881 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-12-17 18:51:40,882 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-12-17 18:51:40,882 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-12-17 18:51:40,882 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-12-17 18:51:40,882 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-12-17 18:51:40,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 18:51:40,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 18:51:40,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 18:51:41,052 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 18:51:41,053 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 18:51:47,064 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 18:51:47,084 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 18:51:47,085 INFO L301 CfgBuilder]: Removed 7 assume(true) statements. [2021-12-17 18:51:47,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 06:51:47 BoogieIcfgContainer [2021-12-17 18:51:47,090 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 18:51:47,092 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 18:51:47,092 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 18:51:47,095 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 18:51:47,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 06:51:36" (1/3) ... [2021-12-17 18:51:47,096 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ac4a487 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 06:51:47, skipping insertion in model container [2021-12-17 18:51:47,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:51:39" (2/3) ... [2021-12-17 18:51:47,096 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ac4a487 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 06:51:47, skipping insertion in model container [2021-12-17 18:51:47,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 06:51:47" (3/3) ... [2021-12-17 18:51:47,098 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label42+token_ring.03.cil-2.c [2021-12-17 18:51:47,102 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 18:51:47,103 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-17 18:51:47,149 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 18:51:47,155 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 18:51:47,155 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-17 18:51:47,204 INFO L276 IsEmpty]: Start isEmpty. Operand has 2340 states, 2314 states have (on average 1.8556611927398445) internal successors, (4294), 2317 states have internal predecessors, (4294), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-12-17 18:51:47,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 18:51:47,213 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:51:47,214 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 18:51:47,214 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:51:47,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:51:47,219 INFO L85 PathProgramCache]: Analyzing trace with hash 200056068, now seen corresponding path program 1 times [2021-12-17 18:51:47,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:51:47,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011402560] [2021-12-17 18:51:47,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:51:47,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:51:47,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:51:47,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:51:47,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:51:47,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 18:51:47,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:51:47,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 18:51:47,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:51:47,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 18:51:47,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:51:47,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 18:51:47,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:51:47,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 18:51:47,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:51:47,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011402560] [2021-12-17 18:51:47,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011402560] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:51:47,579 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 18:51:47,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 18:51:47,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224444977] [2021-12-17 18:51:47,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:51:47,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 18:51:47,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:51:47,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 18:51:47,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 18:51:47,623 INFO L87 Difference]: Start difference. First operand has 2340 states, 2314 states have (on average 1.8556611927398445) internal successors, (4294), 2317 states have internal predecessors, (4294), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:51:48,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:51:48,639 INFO L93 Difference]: Finished difference Result 4899 states and 9012 transitions. [2021-12-17 18:51:48,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 18:51:48,642 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 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 79 [2021-12-17 18:51:48,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:51:48,672 INFO L225 Difference]: With dead ends: 4899 [2021-12-17 18:51:48,672 INFO L226 Difference]: Without dead ends: 2500 [2021-12-17 18:51:48,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-17 18:51:48,688 INFO L933 BasicCegarLoop]: 4287 mSDtfsCounter, 4543 mSDsluCounter, 12503 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4553 SdHoareTripleChecker+Valid, 16790 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 18:51:48,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4553 Valid, 16790 Invalid, 747 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [80 Valid, 667 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 18:51:48,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2500 states. [2021-12-17 18:51:48,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2500 to 2415. [2021-12-17 18:51:48,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2415 states, 2371 states have (on average 1.8291859974694222) internal successors, (4337), 2374 states have internal predecessors, (4337), 29 states have call successors, (29), 12 states have call predecessors, (29), 13 states have return successors, (32), 29 states have call predecessors, (32), 29 states have call successors, (32) [2021-12-17 18:51:48,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2415 states to 2415 states and 4398 transitions. [2021-12-17 18:51:48,828 INFO L78 Accepts]: Start accepts. Automaton has 2415 states and 4398 transitions. Word has length 79 [2021-12-17 18:51:48,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:51:48,829 INFO L470 AbstractCegarLoop]: Abstraction has 2415 states and 4398 transitions. [2021-12-17 18:51:48,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:51:48,830 INFO L276 IsEmpty]: Start isEmpty. Operand 2415 states and 4398 transitions. [2021-12-17 18:51:48,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 18:51:48,838 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:51:48,838 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 18:51:48,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 18:51:48,839 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:51:48,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:51:48,842 INFO L85 PathProgramCache]: Analyzing trace with hash 437104264, now seen corresponding path program 1 times [2021-12-17 18:51:48,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:51:48,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920548259] [2021-12-17 18:51:48,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:51:48,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:51:48,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:51:48,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:51:48,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:51:48,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 18:51:48,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:51:48,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 18:51:48,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:51:48,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 18:51:48,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:51:48,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 18:51:48,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:51:48,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 18:51:48,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:51:48,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920548259] [2021-12-17 18:51:48,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920548259] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:51:48,989 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 18:51:48,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 18:51:48,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057761111] [2021-12-17 18:51:48,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:51:48,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 18:51:48,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:51:48,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 18:51:48,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 18:51:48,993 INFO L87 Difference]: Start difference. First operand 2415 states and 4398 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:51:50,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:51:50,203 INFO L93 Difference]: Finished difference Result 2969 states and 5244 transitions. [2021-12-17 18:51:50,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 18:51:50,203 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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 79 [2021-12-17 18:51:50,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:51:50,217 INFO L225 Difference]: With dead ends: 2969 [2021-12-17 18:51:50,217 INFO L226 Difference]: Without dead ends: 2686 [2021-12-17 18:51:50,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 18:51:50,222 INFO L933 BasicCegarLoop]: 4320 mSDtfsCounter, 4469 mSDsluCounter, 16595 mSDsCounter, 0 mSdLazyCounter, 1050 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4479 SdHoareTripleChecker+Valid, 20915 SdHoareTripleChecker+Invalid, 1107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 18:51:50,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4479 Valid, 20915 Invalid, 1107 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [57 Valid, 1050 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-17 18:51:50,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2686 states. [2021-12-17 18:51:50,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2686 to 2548. [2021-12-17 18:51:50,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2548 states, 2485 states have (on average 1.8132796780684104) internal successors, (4506), 2489 states have internal predecessors, (4506), 41 states have call successors, (41), 18 states have call predecessors, (41), 20 states have return successors, (46), 42 states have call predecessors, (46), 41 states have call successors, (46) [2021-12-17 18:51:50,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2548 states to 2548 states and 4593 transitions. [2021-12-17 18:51:50,303 INFO L78 Accepts]: Start accepts. Automaton has 2548 states and 4593 transitions. Word has length 79 [2021-12-17 18:51:50,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:51:50,303 INFO L470 AbstractCegarLoop]: Abstraction has 2548 states and 4593 transitions. [2021-12-17 18:51:50,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:51:50,304 INFO L276 IsEmpty]: Start isEmpty. Operand 2548 states and 4593 transitions. [2021-12-17 18:51:50,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 18:51:50,307 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:51:50,307 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 18:51:50,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 18:51:50,308 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:51:50,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:51:50,310 INFO L85 PathProgramCache]: Analyzing trace with hash 382711366, now seen corresponding path program 1 times [2021-12-17 18:51:50,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:51:50,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676392367] [2021-12-17 18:51:50,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:51:50,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:51:50,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:51:50,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:51:50,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:51:50,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 18:51:50,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:51:50,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 18:51:50,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:51:50,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 18:51:50,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:51:50,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 18:51:50,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:51:50,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 18:51:50,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:51:50,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676392367] [2021-12-17 18:51:50,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676392367] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:51:50,417 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 18:51:50,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 18:51:50,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515157769] [2021-12-17 18:51:50,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:51:50,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 18:51:50,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:51:50,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 18:51:50,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 18:51:50,420 INFO L87 Difference]: Start difference. First operand 2548 states and 4593 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:51:51,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:51:51,557 INFO L93 Difference]: Finished difference Result 3451 states and 5967 transitions. [2021-12-17 18:51:51,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 18:51:51,558 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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 79 [2021-12-17 18:51:51,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:51:51,571 INFO L225 Difference]: With dead ends: 3451 [2021-12-17 18:51:51,572 INFO L226 Difference]: Without dead ends: 3035 [2021-12-17 18:51:51,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 18:51:51,576 INFO L933 BasicCegarLoop]: 4312 mSDtfsCounter, 4466 mSDsluCounter, 16591 mSDsCounter, 0 mSdLazyCounter, 1056 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4476 SdHoareTripleChecker+Valid, 20903 SdHoareTripleChecker+Invalid, 1116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 18:51:51,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4476 Valid, 20903 Invalid, 1116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1056 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-17 18:51:51,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3035 states. [2021-12-17 18:51:51,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3035 to 2815. [2021-12-17 18:51:51,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2815 states, 2714 states have (on average 1.7851879145173175) internal successors, (4845), 2720 states have internal predecessors, (4845), 65 states have call successors, (65), 30 states have call predecessors, (65), 34 states have return successors, (78), 68 states have call predecessors, (78), 65 states have call successors, (78) [2021-12-17 18:51:51,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2815 states to 2815 states and 4988 transitions. [2021-12-17 18:51:51,654 INFO L78 Accepts]: Start accepts. Automaton has 2815 states and 4988 transitions. Word has length 79 [2021-12-17 18:51:51,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:51:51,654 INFO L470 AbstractCegarLoop]: Abstraction has 2815 states and 4988 transitions. [2021-12-17 18:51:51,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:51:51,655 INFO L276 IsEmpty]: Start isEmpty. Operand 2815 states and 4988 transitions. [2021-12-17 18:51:51,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 18:51:51,656 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:51:51,657 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 18:51:51,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 18:51:51,657 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:51:51,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:51:51,658 INFO L85 PathProgramCache]: Analyzing trace with hash -34685240, now seen corresponding path program 1 times [2021-12-17 18:51:51,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:51:51,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376118014] [2021-12-17 18:51:51,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:51:51,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:51:51,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:51:51,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:51:51,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:51:51,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 18:51:51,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:51:51,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 18:51:51,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:51:51,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 18:51:51,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:51:51,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 18:51:51,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:51:51,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 18:51:51,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:51:51,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376118014] [2021-12-17 18:51:51,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376118014] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:51:51,737 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 18:51:51,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 18:51:51,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185187007] [2021-12-17 18:51:51,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:51:51,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 18:51:51,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:51:51,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 18:51:51,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 18:51:51,739 INFO L87 Difference]: Start difference. First operand 2815 states and 4988 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:51:52,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:51:52,749 INFO L93 Difference]: Finished difference Result 4382 states and 7362 transitions. [2021-12-17 18:51:52,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 18:51:52,750 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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 79 [2021-12-17 18:51:52,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:51:52,766 INFO L225 Difference]: With dead ends: 4382 [2021-12-17 18:51:52,767 INFO L226 Difference]: Without dead ends: 3699 [2021-12-17 18:51:52,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 18:51:52,771 INFO L933 BasicCegarLoop]: 4308 mSDtfsCounter, 4462 mSDsluCounter, 16591 mSDsCounter, 0 mSdLazyCounter, 1051 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4472 SdHoareTripleChecker+Valid, 20899 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 18:51:52,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4472 Valid, 20899 Invalid, 1111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1051 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 18:51:52,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3699 states. [2021-12-17 18:51:52,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3699 to 3350. [2021-12-17 18:51:52,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3350 states, 3173 states have (on average 1.7406240151276395) internal successors, (5523), 3183 states have internal predecessors, (5523), 113 states have call successors, (113), 54 states have call predecessors, (113), 62 states have return successors, (148), 120 states have call predecessors, (148), 113 states have call successors, (148) [2021-12-17 18:51:52,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3350 states to 3350 states and 5784 transitions. [2021-12-17 18:51:52,878 INFO L78 Accepts]: Start accepts. Automaton has 3350 states and 5784 transitions. Word has length 79 [2021-12-17 18:51:52,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:51:52,879 INFO L470 AbstractCegarLoop]: Abstraction has 3350 states and 5784 transitions. [2021-12-17 18:51:52,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:51:52,879 INFO L276 IsEmpty]: Start isEmpty. Operand 3350 states and 5784 transitions. [2021-12-17 18:51:52,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 18:51:52,881 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:51:52,881 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 18:51:52,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 18:51:52,882 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:51:52,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:51:52,882 INFO L85 PathProgramCache]: Analyzing trace with hash 644587014, now seen corresponding path program 1 times [2021-12-17 18:51:52,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:51:52,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362207586] [2021-12-17 18:51:52,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:51:52,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:51:52,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:51:52,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:51:52,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:51:52,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 18:51:52,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:51:52,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 18:51:52,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:51:52,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 18:51:52,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:51:52,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 18:51:52,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:51:52,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 18:51:52,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:51:52,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362207586] [2021-12-17 18:51:52,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362207586] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:51:52,962 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 18:51:52,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 18:51:52,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840610077] [2021-12-17 18:51:52,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:51:52,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 18:51:52,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:51:52,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 18:51:52,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 18:51:52,964 INFO L87 Difference]: Start difference. First operand 3350 states and 5784 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:51:53,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:51:53,491 INFO L93 Difference]: Finished difference Result 4914 states and 8177 transitions. [2021-12-17 18:51:53,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 18:51:53,492 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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 79 [2021-12-17 18:51:53,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:51:53,508 INFO L225 Difference]: With dead ends: 4914 [2021-12-17 18:51:53,508 INFO L226 Difference]: Without dead ends: 3696 [2021-12-17 18:51:53,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-17 18:51:53,515 INFO L933 BasicCegarLoop]: 4169 mSDtfsCounter, 4396 mSDsluCounter, 12153 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4407 SdHoareTripleChecker+Valid, 16322 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 18:51:53,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4407 Valid, 16322 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 18:51:53,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3696 states. [2021-12-17 18:51:53,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3696 to 3350. [2021-12-17 18:51:53,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3350 states, 3173 states have (on average 1.7377875827292784) internal successors, (5514), 3183 states have internal predecessors, (5514), 113 states have call successors, (113), 54 states have call predecessors, (113), 62 states have return successors, (148), 120 states have call predecessors, (148), 113 states have call successors, (148) [2021-12-17 18:51:53,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3350 states to 3350 states and 5775 transitions. [2021-12-17 18:51:53,732 INFO L78 Accepts]: Start accepts. Automaton has 3350 states and 5775 transitions. Word has length 79 [2021-12-17 18:51:53,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:51:53,732 INFO L470 AbstractCegarLoop]: Abstraction has 3350 states and 5775 transitions. [2021-12-17 18:51:53,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:51:53,733 INFO L276 IsEmpty]: Start isEmpty. Operand 3350 states and 5775 transitions. [2021-12-17 18:51:53,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 18:51:53,734 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:51:53,734 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 18:51:53,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 18:51:53,735 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:51:53,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:51:53,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1688805624, now seen corresponding path program 1 times [2021-12-17 18:51:53,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:51:53,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583057189] [2021-12-17 18:51:53,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:51:53,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:51:53,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:51:53,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:51:53,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:51:53,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 18:51:53,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:51:53,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 18:51:53,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:51:53,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 18:51:53,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:51:53,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 18:51:53,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:51:53,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 18:51:53,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:51:53,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583057189] [2021-12-17 18:51:53,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583057189] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:51:53,826 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 18:51:53,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 18:51:53,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494554807] [2021-12-17 18:51:53,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:51:53,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 18:51:53,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:51:53,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 18:51:53,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 18:51:53,828 INFO L87 Difference]: Start difference. First operand 3350 states and 5775 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:51:55,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:51:55,005 INFO L93 Difference]: Finished difference Result 6544 states and 10562 transitions. [2021-12-17 18:51:55,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 18:51:55,006 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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 79 [2021-12-17 18:51:55,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:51:55,030 INFO L225 Difference]: With dead ends: 6544 [2021-12-17 18:51:55,031 INFO L226 Difference]: Without dead ends: 5326 [2021-12-17 18:51:55,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-17 18:51:55,038 INFO L933 BasicCegarLoop]: 4337 mSDtfsCounter, 4475 mSDsluCounter, 16580 mSDsCounter, 0 mSdLazyCounter, 1161 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4484 SdHoareTripleChecker+Valid, 20917 SdHoareTripleChecker+Invalid, 1226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 18:51:55,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4484 Valid, 20917 Invalid, 1226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1161 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-17 18:51:55,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5326 states. [2021-12-17 18:51:55,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5326 to 4369. [2021-12-17 18:51:55,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4369 states, 4048 states have (on average 1.679100790513834) internal successors, (6797), 4066 states have internal predecessors, (6797), 201 states have call successors, (201), 102 states have call predecessors, (201), 118 states have return successors, (298), 216 states have call predecessors, (298), 201 states have call successors, (298) [2021-12-17 18:51:55,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4369 states to 4369 states and 7296 transitions. [2021-12-17 18:51:55,190 INFO L78 Accepts]: Start accepts. Automaton has 4369 states and 7296 transitions. Word has length 79 [2021-12-17 18:51:55,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:51:55,190 INFO L470 AbstractCegarLoop]: Abstraction has 4369 states and 7296 transitions. [2021-12-17 18:51:55,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:51:55,191 INFO L276 IsEmpty]: Start isEmpty. Operand 4369 states and 7296 transitions. [2021-12-17 18:51:55,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 18:51:55,194 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:51:55,194 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 18:51:55,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 18:51:55,194 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:51:55,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:51:55,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1486981690, now seen corresponding path program 1 times [2021-12-17 18:51:55,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:51:55,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165288528] [2021-12-17 18:51:55,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:51:55,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:51:55,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:51:55,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:51:55,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:51:55,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 18:51:55,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:51:55,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 18:51:55,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:51:55,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 18:51:55,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:51:55,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 18:51:55,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:51:55,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 18:51:55,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:51:55,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165288528] [2021-12-17 18:51:55,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165288528] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:51:55,273 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 18:51:55,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 18:51:55,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107744217] [2021-12-17 18:51:55,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:51:55,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 18:51:55,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:51:55,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 18:51:55,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 18:51:55,275 INFO L87 Difference]: Start difference. First operand 4369 states and 7296 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:51:56,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:51:56,465 INFO L93 Difference]: Finished difference Result 9937 states and 15669 transitions. [2021-12-17 18:51:56,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 18:51:56,465 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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 79 [2021-12-17 18:51:56,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:51:56,518 INFO L225 Difference]: With dead ends: 9937 [2021-12-17 18:51:56,519 INFO L226 Difference]: Without dead ends: 7700 [2021-12-17 18:51:56,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-17 18:51:56,531 INFO L933 BasicCegarLoop]: 4287 mSDtfsCounter, 4466 mSDsluCounter, 16583 mSDsCounter, 0 mSdLazyCounter, 995 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4480 SdHoareTripleChecker+Valid, 20870 SdHoareTripleChecker+Invalid, 1062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 18:51:56,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4480 Valid, 20870 Invalid, 1062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 995 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 18:51:56,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7700 states. [2021-12-17 18:51:56,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7700 to 6452. [2021-12-17 18:51:56,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6452 states, 5851 states have (on average 1.6169885489659888) internal successors, (9461), 5885 states have internal predecessors, (9461), 369 states have call successors, (369), 198 states have call predecessors, (369), 230 states have return successors, (644), 400 states have call predecessors, (644), 369 states have call successors, (644) [2021-12-17 18:51:56,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6452 states to 6452 states and 10474 transitions. [2021-12-17 18:51:56,862 INFO L78 Accepts]: Start accepts. Automaton has 6452 states and 10474 transitions. Word has length 79 [2021-12-17 18:51:56,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:51:56,863 INFO L470 AbstractCegarLoop]: Abstraction has 6452 states and 10474 transitions. [2021-12-17 18:51:56,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:51:56,864 INFO L276 IsEmpty]: Start isEmpty. Operand 6452 states and 10474 transitions. [2021-12-17 18:51:56,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 18:51:56,869 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:51:56,869 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 18:51:56,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 18:51:56,870 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:51:56,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:51:56,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1053252604, now seen corresponding path program 1 times [2021-12-17 18:51:56,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:51:56,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413628793] [2021-12-17 18:51:56,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:51:56,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:51:56,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:51:56,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:51:56,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:51:56,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 18:51:56,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:51:56,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 18:51:56,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:51:56,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 18:51:56,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:51:56,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 18:51:56,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:51:56,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 18:51:56,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:51:56,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413628793] [2021-12-17 18:51:56,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413628793] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:51:56,942 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 18:51:56,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 18:51:56,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495116013] [2021-12-17 18:51:56,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:51:56,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 18:51:56,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:51:56,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 18:51:56,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 18:51:56,944 INFO L87 Difference]: Start difference. First operand 6452 states and 10474 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:51:58,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:51:58,080 INFO L93 Difference]: Finished difference Result 14451 states and 22576 transitions. [2021-12-17 18:51:58,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 18:51:58,081 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 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 79 [2021-12-17 18:51:58,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:51:58,128 INFO L225 Difference]: With dead ends: 14451 [2021-12-17 18:51:58,128 INFO L226 Difference]: Without dead ends: 10132 [2021-12-17 18:51:58,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-17 18:51:58,151 INFO L933 BasicCegarLoop]: 4386 mSDtfsCounter, 4626 mSDsluCounter, 12345 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4653 SdHoareTripleChecker+Valid, 16731 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 18:51:58,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4653 Valid, 16731 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 808 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 18:51:58,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10132 states. [2021-12-17 18:51:58,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10132 to 8642. [2021-12-17 18:51:58,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8642 states, 7726 states have (on average 1.572741392699974) internal successors, (12151), 7793 states have internal predecessors, (12151), 566 states have call successors, (566), 300 states have call predecessors, (566), 348 states have return successors, (923), 580 states have call predecessors, (923), 566 states have call successors, (923) [2021-12-17 18:51:58,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8642 states to 8642 states and 13640 transitions. [2021-12-17 18:51:58,588 INFO L78 Accepts]: Start accepts. Automaton has 8642 states and 13640 transitions. Word has length 79 [2021-12-17 18:51:58,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:51:58,588 INFO L470 AbstractCegarLoop]: Abstraction has 8642 states and 13640 transitions. [2021-12-17 18:51:58,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:51:58,588 INFO L276 IsEmpty]: Start isEmpty. Operand 8642 states and 13640 transitions. [2021-12-17 18:51:58,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-17 18:51:58,607 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:51:58,607 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 18:51:58,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 18:51:58,608 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:51:58,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:51:58,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1451529571, now seen corresponding path program 1 times [2021-12-17 18:51:58,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:51:58,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963759699] [2021-12-17 18:51:58,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:51:58,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:51:58,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:51:58,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:51:58,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:51:58,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 18:51:58,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:51:58,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 18:51:58,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:51:58,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 18:51:58,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:51:58,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 18:51:58,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:51:58,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-17 18:51:58,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:51:58,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 18:51:58,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:51:58,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-17 18:51:58,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:51:58,751 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 18:51:58,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:51:58,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963759699] [2021-12-17 18:51:58,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963759699] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 18:51:58,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790261397] [2021-12-17 18:51:58,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:51:58,753 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 18:51:58,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 18:51:58,755 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 18:51:58,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 18:51:58,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:51:58,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 18:51:58,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 18:51:59,087 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-17 18:51:59,087 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 18:51:59,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790261397] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:51:59,088 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 18:51:59,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-17 18:51:59,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468341094] [2021-12-17 18:51:59,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:51:59,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 18:51:59,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:51:59,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 18:51:59,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:51:59,090 INFO L87 Difference]: Start difference. First operand 8642 states and 13640 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 18:51:59,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:51:59,482 INFO L93 Difference]: Finished difference Result 21481 states and 32916 transitions. [2021-12-17 18:51:59,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 18:51:59,483 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 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 128 [2021-12-17 18:51:59,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:51:59,549 INFO L225 Difference]: With dead ends: 21481 [2021-12-17 18:51:59,549 INFO L226 Difference]: Without dead ends: 14972 [2021-12-17 18:51:59,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:51:59,584 INFO L933 BasicCegarLoop]: 4191 mSDtfsCounter, 4135 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4135 SdHoareTripleChecker+Valid, 4388 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 18:51:59,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4135 Valid, 4388 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 18:51:59,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14972 states. [2021-12-17 18:52:00,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14972 to 14870. [2021-12-17 18:52:00,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14870 states, 13070 states have (on average 1.5247130833970926) internal successors, (19928), 13202 states have internal predecessors, (19928), 1102 states have call successors, (1102), 600 states have call predecessors, (1102), 696 states have return successors, (1785), 1099 states have call predecessors, (1785), 1102 states have call successors, (1785) [2021-12-17 18:52:00,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14870 states to 14870 states and 22815 transitions. [2021-12-17 18:52:00,241 INFO L78 Accepts]: Start accepts. Automaton has 14870 states and 22815 transitions. Word has length 128 [2021-12-17 18:52:00,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:52:00,241 INFO L470 AbstractCegarLoop]: Abstraction has 14870 states and 22815 transitions. [2021-12-17 18:52:00,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 18:52:00,242 INFO L276 IsEmpty]: Start isEmpty. Operand 14870 states and 22815 transitions. [2021-12-17 18:52:00,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-17 18:52:00,271 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:52:00,271 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 18:52:00,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 18:52:00,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 18:52:00,487 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:52:00,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:52:00,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1829435325, now seen corresponding path program 1 times [2021-12-17 18:52:00,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:52:00,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177390201] [2021-12-17 18:52:00,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:52:00,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:52:00,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:52:00,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:52:00,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:52:00,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 18:52:00,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:52:00,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 18:52:00,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:52:00,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 18:52:00,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:52:00,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 18:52:00,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:52:00,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-17 18:52:00,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:52:00,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 18:52:00,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:52:00,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-17 18:52:00,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:52:00,587 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 18:52:00,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:52:00,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177390201] [2021-12-17 18:52:00,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177390201] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 18:52:00,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490352823] [2021-12-17 18:52:00,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:52:00,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 18:52:00,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 18:52:00,589 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 18:52:00,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 18:52:00,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:52:00,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 18:52:00,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 18:52:00,932 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-17 18:52:00,932 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 18:52:00,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490352823] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:52:00,933 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 18:52:00,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-17 18:52:00,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260005866] [2021-12-17 18:52:00,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:52:00,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 18:52:00,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:52:00,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 18:52:00,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:52:00,935 INFO L87 Difference]: Start difference. First operand 14870 states and 22815 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 18:52:01,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:52:01,672 INFO L93 Difference]: Finished difference Result 39843 states and 60157 transitions. [2021-12-17 18:52:01,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 18:52:01,673 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 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 128 [2021-12-17 18:52:01,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:52:01,806 INFO L225 Difference]: With dead ends: 39843 [2021-12-17 18:52:01,807 INFO L226 Difference]: Without dead ends: 27106 [2021-12-17 18:52:01,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:52:01,861 INFO L933 BasicCegarLoop]: 4191 mSDtfsCounter, 4129 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4129 SdHoareTripleChecker+Valid, 4388 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 18:52:01,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4129 Valid, 4388 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 18:52:01,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27106 states. [2021-12-17 18:52:02,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27106 to 26904. [2021-12-17 18:52:02,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26904 states, 23410 states have (on average 1.494404100811619) internal successors, (34984), 23672 states have internal predecessors, (34984), 2100 states have call successors, (2100), 1200 states have call predecessors, (2100), 1392 states have return successors, (3435), 2063 states have call predecessors, (3435), 2100 states have call successors, (3435) [2021-12-17 18:52:03,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26904 states to 26904 states and 40519 transitions. [2021-12-17 18:52:03,074 INFO L78 Accepts]: Start accepts. Automaton has 26904 states and 40519 transitions. Word has length 128 [2021-12-17 18:52:03,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:52:03,075 INFO L470 AbstractCegarLoop]: Abstraction has 26904 states and 40519 transitions. [2021-12-17 18:52:03,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 18:52:03,076 INFO L276 IsEmpty]: Start isEmpty. Operand 26904 states and 40519 transitions. [2021-12-17 18:52:03,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-17 18:52:03,122 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:52:03,122 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 18:52:03,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 18:52:03,347 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,SelfDestructingSolverStorable9 [2021-12-17 18:52:03,348 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:52:03,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:52:03,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1038951203, now seen corresponding path program 1 times [2021-12-17 18:52:03,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:52:03,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722543415] [2021-12-17 18:52:03,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:52:03,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:52:03,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:52:03,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:52:03,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:52:03,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 18:52:03,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:52:03,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 18:52:03,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:52:03,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 18:52:03,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:52:03,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 18:52:03,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:52:03,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-17 18:52:03,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:52:03,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 18:52:03,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:52:03,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-17 18:52:03,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:52:03,469 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 18:52:03,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:52:03,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722543415] [2021-12-17 18:52:03,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722543415] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 18:52:03,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27886485] [2021-12-17 18:52:03,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:52:03,470 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 18:52:03,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 18:52:03,472 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 18:52:03,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 18:52:03,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:52:03,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 18:52:03,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 18:52:03,800 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-17 18:52:03,801 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 18:52:03,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27886485] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:52:03,802 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 18:52:03,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-17 18:52:03,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403922587] [2021-12-17 18:52:03,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:52:03,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 18:52:03,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:52:03,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 18:52:03,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:52:03,806 INFO L87 Difference]: Start difference. First operand 26904 states and 40519 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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) [2021-12-17 18:52:05,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:52:05,299 INFO L93 Difference]: Finished difference Result 75433 states and 113453 transitions. [2021-12-17 18:52:05,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 18:52:05,299 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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 128 [2021-12-17 18:52:05,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:52:05,649 INFO L225 Difference]: With dead ends: 75433 [2021-12-17 18:52:05,649 INFO L226 Difference]: Without dead ends: 50663 [2021-12-17 18:52:05,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:52:05,705 INFO L933 BasicCegarLoop]: 4380 mSDtfsCounter, 193 mSDsluCounter, 4179 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 8559 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 [2021-12-17 18:52:05,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 8559 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 18:52:05,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50663 states. [2021-12-17 18:52:07,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50663 to 50663. [2021-12-17 18:52:07,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50663 states, 43814 states have (on average 1.4695531108778017) internal successors, (64387), 44269 states have internal predecessors, (64387), 4063 states have call successors, (4063), 2400 states have call predecessors, (4063), 2784 states have return successors, (7494), 4057 states have call predecessors, (7494), 4063 states have call successors, (7494) [2021-12-17 18:52:07,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50663 states to 50663 states and 75944 transitions. [2021-12-17 18:52:07,835 INFO L78 Accepts]: Start accepts. Automaton has 50663 states and 75944 transitions. Word has length 128 [2021-12-17 18:52:07,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:52:07,837 INFO L470 AbstractCegarLoop]: Abstraction has 50663 states and 75944 transitions. [2021-12-17 18:52:07,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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) [2021-12-17 18:52:07,837 INFO L276 IsEmpty]: Start isEmpty. Operand 50663 states and 75944 transitions. [2021-12-17 18:52:08,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-12-17 18:52:08,187 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:52:08,187 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 18:52:08,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 18:52:08,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 18:52:08,413 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:52:08,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:52:08,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1108291405, now seen corresponding path program 1 times [2021-12-17 18:52:08,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:52:08,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126859677] [2021-12-17 18:52:08,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:52:08,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:52:08,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:52:08,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:52:08,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:52:08,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 18:52:08,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:52:08,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 18:52:08,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:52:08,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 18:52:08,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:52:08,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 18:52:08,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:52:08,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-17 18:52:08,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:52:08,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 18:52:08,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:52:08,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-17 18:52:08,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:52:08,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 18:52:08,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:52:08,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-12-17 18:52:08,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:52:08,548 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-17 18:52:08,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:52:08,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126859677] [2021-12-17 18:52:08,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126859677] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 18:52:08,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253841311] [2021-12-17 18:52:08,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:52:08,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 18:52:08,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 18:52:08,552 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 18:52:08,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 18:52:08,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:52:08,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 18:52:08,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 18:52:08,981 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-17 18:52:08,982 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 18:52:08,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253841311] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:52:08,982 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 18:52:08,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-17 18:52:08,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562578275] [2021-12-17 18:52:08,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:52:08,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 18:52:08,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:52:08,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 18:52:08,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:52:08,987 INFO L87 Difference]: Start difference. First operand 50663 states and 75944 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 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) [2021-12-17 18:52:11,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:52:11,528 INFO L93 Difference]: Finished difference Result 145415 states and 218067 transitions. [2021-12-17 18:52:11,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 18:52:11,529 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 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 166 [2021-12-17 18:52:11,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:52:12,173 INFO L225 Difference]: With dead ends: 145415 [2021-12-17 18:52:12,174 INFO L226 Difference]: Without dead ends: 96891 [2021-12-17 18:52:12,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:52:12,326 INFO L933 BasicCegarLoop]: 4200 mSDtfsCounter, 4085 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4085 SdHoareTripleChecker+Valid, 4397 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 18:52:12,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4085 Valid, 4397 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 18:52:12,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96891 states. [2021-12-17 18:52:15,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96891 to 96089. [2021-12-17 18:52:15,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96089 states, 82996 states have (on average 1.4590703166417658) internal successors, (121097), 83903 states have internal predecessors, (121097), 7621 states have call successors, (7621), 4702 states have call predecessors, (7621), 5470 states have return successors, (14146), 7547 states have call predecessors, (14146), 7621 states have call successors, (14146) [2021-12-17 18:52:16,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96089 states to 96089 states and 142864 transitions. [2021-12-17 18:52:16,072 INFO L78 Accepts]: Start accepts. Automaton has 96089 states and 142864 transitions. Word has length 166 [2021-12-17 18:52:16,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:52:16,072 INFO L470 AbstractCegarLoop]: Abstraction has 96089 states and 142864 transitions. [2021-12-17 18:52:16,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 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) [2021-12-17 18:52:16,073 INFO L276 IsEmpty]: Start isEmpty. Operand 96089 states and 142864 transitions. [2021-12-17 18:52:16,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-12-17 18:52:16,716 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:52:16,716 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, 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, 1, 1, 1] [2021-12-17 18:52:16,750 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-17 18:52:16,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 18:52:16,917 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:52:16,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:52:16,917 INFO L85 PathProgramCache]: Analyzing trace with hash 399987983, now seen corresponding path program 1 times [2021-12-17 18:52:16,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:52:16,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058260565] [2021-12-17 18:52:16,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:52:16,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:52:16,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:52:16,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:52:16,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:52:16,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 18:52:16,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:52:16,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 18:52:16,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:52:17,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 18:52:17,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:52:17,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 18:52:17,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:52:17,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-17 18:52:17,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:52:17,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-17 18:52:17,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:52:17,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 18:52:17,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:52:17,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-17 18:52:17,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:52:17,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 18:52:17,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:52:17,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2021-12-17 18:52:17,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:52:17,057 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-17 18:52:17,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:52:17,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058260565] [2021-12-17 18:52:17,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058260565] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 18:52:17,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820955694] [2021-12-17 18:52:17,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:52:17,058 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 18:52:17,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 18:52:17,064 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) [2021-12-17 18:52:17,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 18:52:17,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:52:17,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 18:52:17,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 18:52:17,501 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-17 18:52:17,501 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 18:52:17,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820955694] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:52:17,501 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 18:52:17,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-17 18:52:17,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131360031] [2021-12-17 18:52:17,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:52:17,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 18:52:17,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:52:17,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 18:52:17,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:52:17,503 INFO L87 Difference]: Start difference. First operand 96089 states and 142864 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 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) [2021-12-17 18:52:20,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:52:20,834 INFO L93 Difference]: Finished difference Result 202199 states and 303485 transitions. [2021-12-17 18:52:20,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 18:52:20,834 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 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 184 [2021-12-17 18:52:20,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:52:21,280 INFO L225 Difference]: With dead ends: 202199 [2021-12-17 18:52:21,280 INFO L226 Difference]: Without dead ends: 108251 [2021-12-17 18:52:21,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:52:21,697 INFO L933 BasicCegarLoop]: 4178 mSDtfsCounter, 4108 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4108 SdHoareTripleChecker+Valid, 4222 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 18:52:21,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4108 Valid, 4222 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 18:52:21,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108251 states. [2021-12-17 18:52:25,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108251 to 108251. [2021-12-17 18:52:25,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108251 states, 94154 states have (on average 1.4208105869108056) internal successors, (133775), 95061 states have internal predecessors, (133775), 7923 states have call successors, (7923), 5404 states have call predecessors, (7923), 6172 states have return successors, (14574), 7849 states have call predecessors, (14574), 7923 states have call successors, (14574) [2021-12-17 18:52:25,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108251 states to 108251 states and 156272 transitions. [2021-12-17 18:52:25,865 INFO L78 Accepts]: Start accepts. Automaton has 108251 states and 156272 transitions. Word has length 184 [2021-12-17 18:52:25,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:52:25,866 INFO L470 AbstractCegarLoop]: Abstraction has 108251 states and 156272 transitions. [2021-12-17 18:52:25,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 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) [2021-12-17 18:52:25,866 INFO L276 IsEmpty]: Start isEmpty. Operand 108251 states and 156272 transitions. [2021-12-17 18:52:26,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-12-17 18:52:26,115 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:52:26,115 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, 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, 1, 1, 1] [2021-12-17 18:52:26,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 18:52:26,339 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,SelfDestructingSolverStorable12 [2021-12-17 18:52:26,340 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:52:26,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:52:26,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1248051052, now seen corresponding path program 1 times [2021-12-17 18:52:26,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:52:26,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008864216] [2021-12-17 18:52:26,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:52:26,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:52:26,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:52:26,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:52:26,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:52:26,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 18:52:26,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:52:26,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 18:52:26,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:52:26,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 18:52:26,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:52:26,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 18:52:26,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:52:26,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-17 18:52:26,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:52:26,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-17 18:52:26,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:52:26,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 18:52:26,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:52:26,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-17 18:52:26,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:52:26,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 18:52:26,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:52:26,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2021-12-17 18:52:26,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:52:26,723 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-12-17 18:52:26,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:52:26,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008864216] [2021-12-17 18:52:26,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008864216] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 18:52:26,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6418194] [2021-12-17 18:52:26,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:52:26,724 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 18:52:26,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 18:52:26,726 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) [2021-12-17 18:52:26,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 18:52:26,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:52:26,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 18:52:26,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 18:52:27,127 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-17 18:52:27,127 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 18:52:27,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6418194] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:52:27,128 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 18:52:27,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-17 18:52:27,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519584937] [2021-12-17 18:52:27,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:52:27,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 18:52:27,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:52:27,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 18:52:27,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:52:27,130 INFO L87 Difference]: Start difference. First operand 108251 states and 156272 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 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) [2021-12-17 18:52:30,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:52:30,635 INFO L93 Difference]: Finished difference Result 187531 states and 268805 transitions. [2021-12-17 18:52:30,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 18:52:30,636 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 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 184 [2021-12-17 18:52:30,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:52:31,042 INFO L225 Difference]: With dead ends: 187531 [2021-12-17 18:52:31,042 INFO L226 Difference]: Without dead ends: 115519 [2021-12-17 18:52:31,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:52:31,158 INFO L933 BasicCegarLoop]: 4201 mSDtfsCounter, 4120 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4120 SdHoareTripleChecker+Valid, 4408 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 [2021-12-17 18:52:31,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4120 Valid, 4408 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 18:52:31,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115519 states.